Improvements to the MMC over SPI driver.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3741 35acf78f-673a-0410-8e92-d51de3d6d3f4master
gdisirio
parent
600b02f38f
commit
62b090c673
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@ -19,7 +19,7 @@
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*/
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/**
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* @file spi.h
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* @file mmc_spi.h
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* @brief MMC over SPI driver header.
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*
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* @addtogroup MMC_SPI
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@ -37,10 +37,12 @@
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#define MMC_CMD0_RETRY 10
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#define MMC_CMD1_RETRY 100
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#define MMC_ACMD41_RETRY 100
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#define MMC_WAIT_DATA 10000
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#define MMC_CMDGOIDLE 0
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#define MMC_CMDINIT 1
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#define MMC_CMDINTERFACE_CONDITION 8
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#define MMC_CMDREADCSD 9
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#define MMC_CMDSTOP 12
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#define MMC_CMDSETBLOCKLEN 16
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@ -48,6 +50,9 @@
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#define MMC_CMDREADMULTIPLE 18
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#define MMC_CMDWRITE 24
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#define MMC_CMDWRITEMULTIPLE 25
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#define MMC_CMDAPP 55
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#define MMC_CMDREADOCR 58
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#define MMC_ACMDOPCONDITION 41
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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@ -180,6 +185,10 @@ typedef struct {
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* @brief Insertion counter.
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*/
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uint_fast8_t cnt;
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/***
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* @brief Addresses use blocks instead of bytes.
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*/
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bool_t block_addresses;
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} MMCDriver;
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/*===========================================================================*/
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@ -17,6 +17,10 @@
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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Concepts and parts of this file have been contributed by Uladzimir Pylinsky
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aka barthess.
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*/
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/**
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* @file STM32/i2c_lld.c
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@ -112,6 +116,63 @@ static volatile uint16_t dbgCR2;
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/* Driver local functions. */
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/*===========================================================================*/
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/**
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* @brief Wakes up the waiting thread.
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*
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* @param[in] i2cp pointer to the @p I2CDriver object
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* @param[in] msg wakeup message
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*
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* @notapi
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*/
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#define wakeup_isr(i2cp, msg) { \
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chSysLockFromIsr(); \
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if ((i2cp)->thread != NULL) { \
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Thread *tp = (i2cp)->thread; \
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(i2cp)->thread = NULL; \
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tp->p_u.rdymsg = (msg); \
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chSchReadyI(tp); \
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} \
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chSysUnlockFromIsr(); \
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}
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/**
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* @brief Aborts an I2C transaction.
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*
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* @param[in] i2cp pointer to the @p I2CDriver object
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*
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* @notapi
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*/
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static void i2c_lld_abort_operation(I2CDriver *i2cp) {
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/* Stops the I2C peripheral.*/
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i2cp->i2c->CR1 = I2C_CR1_SWRST;
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i2cp->i2c->CR1 = 0;
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i2cp->i2c->SR1 = 0;
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/* Stops the associated DMA streams.*/
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dmaStreamDisable(i2cp->dmatx);
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dmaStreamDisable(i2cp->dmarx);
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dmaStreamClearInterrupt(i2cp->dmatx);
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dmaStreamClearInterrupt(i2cp->dmarx);
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}
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/**
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* @brief Handling of stalled I2C transactions.
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*
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* @param[in] i2cp pointer to the @p I2CDriver object
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*
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* @notapi
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*/
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static void i2c_lld_safety_timeout(void *p) {
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I2CDriver *i2cp = (I2CDriver *)p;
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if (i2cp->thread) {
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i2c_lld_abort_operation(i2cp);
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i2cp->thread->p_u.rdymsg = RDY_TIMEOUT;
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chSchReadyI(i2cp->thread);
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}
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}
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/**
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* @brief Set clock speed.
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*
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@ -206,7 +267,6 @@ static void i2c_lld_set_opmode(I2CDriver *i2cp) {
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regCR1 |= (I2C_CR1_SMBUS|I2C_CR1_SMBTYPE);
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break;
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}
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i2cp->i2c->CR1 = regCR1;
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}
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@ -242,7 +302,7 @@ static uint32_t i2c_get_event(I2CDriver *i2cp) {
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*
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* @notapi
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*/
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static void i2c_serve_event_interrupt(I2CDriver *i2cp) {
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static void i2c_lld_serve_event_interrupt(I2CDriver *i2cp) {
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I2C_TypeDef *dp = i2cp->i2c;
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switch (i2c_get_event(i2cp)) {
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@ -260,13 +320,13 @@ static void i2c_serve_event_interrupt(I2CDriver *i2cp) {
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case I2C_EV8_2_MASTER_BYTE_TRANSMITTED:
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/* Catches BTF event after the end of transmission.*/
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if (dmaStreamGetTransactionSize(i2cp->dmarx) > 0) {
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/* Starts "read after write" operation.*/
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i2cp->addr |= 0x01; /* LSB = 1 -> receive */
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/* Starts "read after write" operation, LSB = 1 -> receive.*/
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i2cp->addr |= 0x01;
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i2cp->i2c->CR1 |= I2C_CR1_START | I2C_CR1_ACK;
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return;
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}
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i2cp->i2c->CR1 |= I2C_CR1_STOP;
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i2c_lld_isr_code(i2cp);
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wakeup_isr(i2cp, RDY_OK);
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break;
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default:
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break;
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@ -277,14 +337,24 @@ static void i2c_serve_event_interrupt(I2CDriver *i2cp) {
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* @brief DMA RX end IRQ handler.
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*
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* @param[in] i2cp pointer to the @p I2CDriver object
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* @param[in] flags pre-shifted content of the ISR register
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*
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* @notapi
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*/
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static void i2c_lld_serve_rx_end_irq(I2CDriver *i2cp) {
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static void i2c_lld_serve_rx_end_irq(I2CDriver *i2cp, uint32_t flags) {
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/* DMA errors handling.*/
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#if defined(STM32_I2C_DMA_ERROR_HOOK)
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if ((flags & (STM32_DMA_ISR_TEIF | STM32_DMA_ISR_DMEIF)) != 0) {
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STM32_I2C_DMA_ERROR_HOOK(i2cp);
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}
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#else
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(void)flags;
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#endif
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dmaStreamDisable(i2cp->dmarx);
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i2cp->i2c->CR1 |= I2C_CR1_STOP;
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i2c_lld_isr_code(i2cp);
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wakeup_isr(i2cp, RDY_OK);
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}
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/**
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@ -294,7 +364,16 @@ static void i2c_lld_serve_rx_end_irq(I2CDriver *i2cp) {
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*
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* @notapi
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*/
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static void i2c_lld_serve_tx_end_irq(I2CDriver *i2cp) {
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static void i2c_lld_serve_tx_end_irq(I2CDriver *i2cp, uint32_t flags) {
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/* DMA errors handling.*/
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#if defined(STM32_I2C_DMA_ERROR_HOOK)
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if ((flags & (STM32_DMA_ISR_TEIF | STM32_DMA_ISR_DMEIF)) != 0) {
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STM32_I2C_DMA_ERROR_HOOK(i2cp);
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}
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#else
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(void)flags;
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#endif
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dmaStreamDisable(i2cp->dmatx);
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}
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@ -306,7 +385,7 @@ static void i2c_lld_serve_tx_end_irq(I2CDriver *i2cp) {
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*
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* @notapi
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*/
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static void i2c_serve_error_interrupt(I2CDriver *i2cp) {
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static void i2c_lld_serve_error_interrupt(I2CDriver *i2cp) {
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i2cflags_t errors;
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chSysLockFromIsr();
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@ -351,8 +430,8 @@ static void i2c_serve_error_interrupt(I2CDriver *i2cp) {
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/* If some error has been identified then sends wakes the waiting thread.*/
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if (errors != I2CD_NO_ERROR) {
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i2cp->errors |= errors;
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i2c_lld_isr_err_code(i2cp);
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i2cp->errors = errors;
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wakeup_isr(i2cp, RDY_RESET);
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}
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}
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@ -370,7 +449,7 @@ CH_IRQ_HANDLER(I2C1_EV_IRQHandler) {
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CH_IRQ_PROLOGUE();
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i2c_serve_event_interrupt(&I2CD1);
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i2c_lld_serve_event_interrupt(&I2CD1);
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CH_IRQ_EPILOGUE();
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}
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@ -382,7 +461,7 @@ CH_IRQ_HANDLER(I2C1_ER_IRQHandler) {
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CH_IRQ_PROLOGUE();
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i2c_serve_error_interrupt(&I2CD1);
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i2c_lld_serve_error_interrupt(&I2CD1);
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CH_IRQ_EPILOGUE();
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}
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@ -398,7 +477,7 @@ CH_IRQ_HANDLER(I2C2_EV_IRQHandler) {
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CH_IRQ_PROLOGUE();
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i2c_serve_event_interrupt(&I2CD2);
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i2c_lld_serve_event_interrupt(&I2CD2);
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CH_IRQ_EPILOGUE();
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}
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@ -412,7 +491,7 @@ CH_IRQ_HANDLER(I2C2_ER_IRQHandler) {
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CH_IRQ_PROLOGUE();
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i2c_serve_error_interrupt(&I2CD2);
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i2c_lld_serve_error_interrupt(&I2CD2);
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CH_IRQ_EPILOGUE();
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}
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@ -428,7 +507,7 @@ CH_IRQ_HANDLER(I2C3_EV_IRQHandler) {
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CH_IRQ_PROLOGUE();
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i2c_serve_event_interrupt(&I2CD3);
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i2c_lld_serve_event_interrupt(&I2CD3);
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CH_IRQ_EPILOGUE();
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}
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@ -442,12 +521,15 @@ CH_IRQ_HANDLER(I2C3_ER_IRQHandler) {
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CH_IRQ_PROLOGUE();
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i2c_serve_error_interrupt(&I2CD3);
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i2c_lld_serve_error_interrupt(&I2CD3);
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CH_IRQ_EPILOGUE();
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}
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#endif /* STM32_I2C_USE_I2C3 */
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level I2C driver initialization.
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@ -497,12 +579,11 @@ void i2c_lld_start(I2CDriver *i2cp) {
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/* If in stopped state then enables the I2C and DMA clocks.*/
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if (i2cp->state == I2C_STOP) {
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i2c_lld_reset(i2cp);
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#if STM32_I2C_USE_I2C1
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if (&I2CD1 == i2cp) {
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bool_t b;
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rccResetI2C1();
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b = dmaStreamAllocate(i2cp->dmarx,
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STM32_I2C_I2C1_IRQ_PRIORITY,
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(stm32_dmaisr_t)i2c_lld_serve_rx_end_irq,
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@ -528,6 +609,7 @@ void i2c_lld_start(I2CDriver *i2cp) {
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if (&I2CD2 == i2cp) {
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bool_t b;
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rccResetI2C2();
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b = dmaStreamAllocate(i2cp->dmarx,
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STM32_I2C_I2C2_IRQ_PRIORITY,
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(stm32_dmaisr_t)i2c_lld_serve_rx_end_irq,
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@ -553,6 +635,7 @@ void i2c_lld_start(I2CDriver *i2cp) {
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if (&I2CD3 == i2cp) {
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bool_t b;
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rccResetI2C3();
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b = dmaStreamAllocate(i2cp->dmarx,
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STM32_I2C_I2C3_IRQ_PRIORITY,
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(stm32_dmaisr_t)i2c_lld_serve_rx_end_irq,
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@ -575,6 +658,10 @@ void i2c_lld_start(I2CDriver *i2cp) {
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#endif /* STM32_I2C_USE_I2C3 */
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}
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/* DMA streams mode preparation in advance.*/
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dmaStreamSetMode(i2cp->dmatx, i2cp->dmamode | STM32_DMA_CR_DIR_M2P);
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dmaStreamSetMode(i2cp->dmarx, i2cp->dmamode | STM32_DMA_CR_DIR_P2M);
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/* I2C registers pointed by the DMA.*/
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dmaStreamSetPeripheral(i2cp->dmarx, &i2cp->i2c->DR);
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dmaStreamSetPeripheral(i2cp->dmatx, &i2cp->i2c->DR);
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@ -582,6 +669,7 @@ void i2c_lld_start(I2CDriver *i2cp) {
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/* Reset i2c peripheral.*/
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i2cp->i2c->CR1 = I2C_CR1_SWRST;
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i2cp->i2c->CR1 = 0;
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i2cp->i2c->CR2 = I2C_CR2_ITERREN | I2C_CR2_ITEVTEN;
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/* Setup I2C parameters.*/
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i2c_lld_set_clock(i2cp);
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@ -603,12 +691,8 @@ void i2c_lld_stop(I2CDriver *i2cp) {
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/* If not in stopped state then disables the I2C clock.*/
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if (i2cp->state != I2C_STOP) {
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i2c_lld_reset(i2cp);
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dmaStreamDisable(i2cp->dmatx);
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dmaStreamDisable(i2cp->dmarx);
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dmaStreamClearInterrupt(i2cp->dmatx);
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dmaStreamClearInterrupt(i2cp->dmarx);
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/* I2C disable.*/
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i2c_lld_abort_operation(i2cp);
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dmaStreamRelease(i2cp->dmatx);
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dmaStreamRelease(i2cp->dmarx);
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@ -638,33 +722,6 @@ void i2c_lld_stop(I2CDriver *i2cp) {
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}
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}
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/**
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* @brief Resets the interface via RCC.
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*
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* @param[in] i2cp pointer to the @p I2CDriver object
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*
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* @notapi
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*/
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void i2c_lld_reset(I2CDriver *i2cp) {
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chDbgCheck((i2cp->state == I2C_STOP)||(i2cp->state == I2C_READY),
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"i2c_lld_reset: invalid state");
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#if STM32_I2C_USE_I2C1
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if (&I2CD1 == i2cp)
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rccResetI2C1();
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#endif /* STM32_I2C_USE_I2C1 */
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#if STM32_I2C_USE_I2C2
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if (&I2CD2 == i2cp)
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rccResetI2C2();
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#endif /* STM32_I2C_USE_I2C2 */
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#if STM32_I2C_USE_I2C3
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if (&I2CD3 == i2cp)
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rccResetI2C3();
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#endif /* STM32_I2C_USE_I2C3 */
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}
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/**
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* @brief Receives data via the I2C bus as master.
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* @details Number of receiving bytes must be more than 1 because of stm32
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@ -682,53 +739,61 @@ void i2c_lld_reset(I2CDriver *i2cp) {
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* @retval RDY_OK if the function succeeded.
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* @retval RDY_RESET if one or more I2C errors occurred, the errors can
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* be retrieved using @p i2cGetErrors().
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* @retval RDY_TIMEOUT if a timeout occurred before operation end.
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* @retval RDY_TIMEOUT if a timeout occurred before operation end. <b>After a
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* timeout the driver must be stopped and restarted
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* because the bus is in an uncertain state</b>.
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*
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* @notapi
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*/
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msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
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uint8_t *rxbuf, size_t rxbytes,
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systime_t timeout) {
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VirtualTimer vt;
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msg_t rdymsg;
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chDbgCheck((rxbytes > 1), "i2c_lld_master_receive_timeout");
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/* Global timeout for the whole operation.*/
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chVTSetI(&vt, timeout, i2c_lld_safety_timeout, (void *)i2cp);
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/* Releases the lock from high level driver.*/
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chSysUnlock();
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chDbgCheck((rxbytes > 1), "i2c_lld_master_receive_timeout");
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/* Initializes driver fields, LSB = 1 -> receive.*/
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i2cp->addr = (addr << 1) | 0x01;
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i2cp->errors = 0;
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/* TODO: DMA error handling */
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/* RX DMA setup.*/
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dmaStreamSetMemory0(i2cp->dmarx, rxbuf);
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dmaStreamSetTransactionSize(i2cp->dmarx, rxbytes);
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dmaStreamSetMode(i2cp->dmarx, i2cp->dmamode | STM32_DMA_CR_DIR_P2M);
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/* Waits until BUSY flag is reset.*/
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volatile uint32_t tmo = 1 + (STM32_SYSCLK / 1000000) * 20;
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while((i2cp->i2c->SR2 & I2C_SR2_BUSY) && tmo)
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tmo--;
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if (tmo == 0)
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return RDY_RESET;
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|
||||
/* wait stop bit from previous transaction*/
|
||||
tmo = 1 + (STM32_SYSCLK / 1000000) * 20;
|
||||
while((i2cp->i2c->CR1 & I2C_CR1_STOP) && tmo)
|
||||
tmo--;
|
||||
if (tmo == 0)
|
||||
return RDY_RESET;
|
||||
/* Waits until BUSY flag is reset and the STOP from the previous operation
|
||||
is completed, alternatively for a timeout condition.*/
|
||||
while ((i2cp->i2c->SR2 & I2C_SR2_BUSY) || (i2cp->i2c->CR1 & I2C_CR1_STOP)) {
|
||||
if (!chVTIsArmedI(&vt)) {
|
||||
chSysLock();
|
||||
return RDY_TIMEOUT;
|
||||
}
|
||||
}
|
||||
|
||||
/* This lock will be released in high level driver.*/
|
||||
chSysLock();
|
||||
|
||||
/* Within the critical zone in order to avoid race conditions.*/
|
||||
i2cp->i2c->CR2 |= I2C_CR2_ITERREN | I2C_CR2_ITEVTEN;
|
||||
/* Atomic check on the timer in order to make sure that a timeout didn't
|
||||
happen outside the critical zone.*/
|
||||
if (!chVTIsArmedI(&vt))
|
||||
return RDY_TIMEOUT;
|
||||
|
||||
/* Starts the operation.*/
|
||||
i2cp->i2c->CR2 &= I2C_CR2_FREQ;
|
||||
i2cp->i2c->CR1 |= I2C_CR1_START | I2C_CR1_ACK;
|
||||
|
||||
/* Waits for the operation completion.*/
|
||||
i2c_lld_wait_s(i2cp, timeout, rdymsg);
|
||||
/* Waits for the operation completion or a timeout.*/
|
||||
i2cp->thread = chThdSelf();
|
||||
chSchGoSleepS(THD_STATE_SUSPENDED);
|
||||
rdymsg = chThdSelf()->p_u.rdymsg;
|
||||
if (rdymsg != RDY_TIMEOUT)
|
||||
chVTResetI(&vt);
|
||||
|
||||
return rdymsg;
|
||||
}
|
||||
|
|
@ -752,7 +817,9 @@ msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
|||
* @retval RDY_OK if the function succeeded.
|
||||
* @retval RDY_RESET if one or more I2C errors occurred, the errors can
|
||||
* be retrieved using @p i2cGetErrors().
|
||||
* @retval RDY_TIMEOUT if a timeout occurred before operation end.
|
||||
* @retval RDY_TIMEOUT if a timeout occurred before operation end. <b>After a
|
||||
* timeout the driver must be stopped and restarted
|
||||
* because the bus is in an uncertain state</b>.
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
|
|
@ -760,52 +827,57 @@ msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
|||
const uint8_t *txbuf, size_t txbytes,
|
||||
uint8_t *rxbuf, size_t rxbytes,
|
||||
systime_t timeout) {
|
||||
VirtualTimer vt;
|
||||
msg_t rdymsg;
|
||||
|
||||
/* Releases the lock from high level driver.*/
|
||||
chSysUnlock();
|
||||
|
||||
chDbgCheck(((rxbytes == 0) || ((rxbytes > 1) && (rxbuf != NULL))),
|
||||
"i2c_lld_master_transmit_timeout");
|
||||
|
||||
/* Global timeout for the whole operation.*/
|
||||
chVTSetI(&vt, timeout, i2c_lld_safety_timeout, (void *)i2cp);
|
||||
|
||||
/* Releases the lock from high level driver.*/
|
||||
chSysUnlock();
|
||||
|
||||
/* Initializes driver fields, LSB = 0 -> write.*/
|
||||
i2cp->addr = addr << 1;
|
||||
i2cp->errors = 0;
|
||||
|
||||
/* TODO: DMA error handling */
|
||||
/* TX DMA setup.*/
|
||||
dmaStreamSetMemory0(i2cp->dmatx, txbuf);
|
||||
dmaStreamSetTransactionSize(i2cp->dmatx, txbytes);
|
||||
dmaStreamSetMode(i2cp->dmatx, i2cp->dmamode | STM32_DMA_CR_DIR_M2P);
|
||||
|
||||
/* RX DMA setup.*/
|
||||
dmaStreamSetMemory0(i2cp->dmarx, rxbuf);
|
||||
dmaStreamSetTransactionSize(i2cp->dmarx, rxbytes);
|
||||
dmaStreamSetMode(i2cp->dmarx, i2cp->dmamode | STM32_DMA_CR_DIR_P2M);
|
||||
|
||||
/* Waits until BUSY flag is reset.*/
|
||||
volatile uint32_t tmo = 1 + (STM32_SYSCLK / 1000000) * 20;
|
||||
while((i2cp->i2c->SR2 & I2C_SR2_BUSY) && tmo)
|
||||
tmo--;
|
||||
if (tmo == 0)
|
||||
return RDY_RESET;
|
||||
|
||||
/* Wait stop bit from previous transaction.*/
|
||||
tmo = 1 + (STM32_SYSCLK / 1000000) * 20;
|
||||
while((i2cp->i2c->CR1 & I2C_CR1_STOP) && tmo)
|
||||
tmo--;
|
||||
if (tmo == 0)
|
||||
return RDY_RESET;
|
||||
/* Waits until BUSY flag is reset and the STOP from the previous operation
|
||||
is completed, alternatively for a timeout condition.*/
|
||||
while ((i2cp->i2c->SR2 & I2C_SR2_BUSY) || (i2cp->i2c->CR1 & I2C_CR1_STOP)) {
|
||||
if (!chVTIsArmedI(&vt)) {
|
||||
chSysLock();
|
||||
return RDY_TIMEOUT;
|
||||
}
|
||||
}
|
||||
|
||||
/* This lock will be released in high level driver.*/
|
||||
chSysLock();
|
||||
|
||||
/* Within the critical zone in order to avoid race conditions.*/
|
||||
i2cp->i2c->CR2 |= I2C_CR2_ITERREN | I2C_CR2_ITEVTEN;
|
||||
/* Atomic check on the timer in order to make sure that a timeout didn't
|
||||
happen outside the critical zone.*/
|
||||
if (!chVTIsArmedI(&vt))
|
||||
return RDY_TIMEOUT;
|
||||
|
||||
/* Starts the operation.*/
|
||||
i2cp->i2c->CR2 &= I2C_CR2_FREQ;
|
||||
i2cp->i2c->CR1 |= I2C_CR1_START;
|
||||
|
||||
/* Waits for the operation completion.*/
|
||||
i2c_lld_wait_s(i2cp, timeout, rdymsg);
|
||||
/* Waits for the operation completion or a timeout.*/
|
||||
i2cp->thread = chThdSelf();
|
||||
chSchGoSleepS(THD_STATE_SUSPENDED);
|
||||
rdymsg = chThdSelf()->p_u.rdymsg;
|
||||
if (rdymsg != RDY_TIMEOUT)
|
||||
chVTResetI(&vt);
|
||||
|
||||
return rdymsg;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -17,6 +17,10 @@
|
|||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
/*
|
||||
Concepts and parts of this file have been contributed by Uladzimir Pylinsky
|
||||
aka barthess.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @file STM32/i2c_lld.h
|
||||
|
|
@ -367,87 +371,6 @@ struct I2CDriver{
|
|||
/* Driver macros. */
|
||||
/*===========================================================================*/
|
||||
|
||||
/**
|
||||
* @brief Waits for operation completion.
|
||||
* @details This function waits for the driver to complete the current
|
||||
* operation.
|
||||
* @pre An operation must be running while the function is invoked.
|
||||
* @note No more than one thread can wait on a I2C driver using
|
||||
* this function.
|
||||
*
|
||||
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||
* @param[in] timeout the number of ticks before the operation timeouts,
|
||||
* the following special values are allowed:
|
||||
* - @a TIME_INFINITE no timeout.
|
||||
* .
|
||||
* @param[out] rdymsg received message on wakeup
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
#define i2c_lld_wait_s(i2cp, timeout, rdymsg) { \
|
||||
chDbgAssert((i2cp)->thread == NULL, \
|
||||
"_i2c_wait(), #1", "already waiting"); \
|
||||
(i2cp)->thread = chThdSelf(); \
|
||||
rdymsg = chSchGoSleepTimeoutS(THD_STATE_SUSPENDED, timeout); \
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Wakes up the waiting thread.
|
||||
*
|
||||
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
#define i2c_lld_wakeup_isr(i2cp) { \
|
||||
chSysLockFromIsr(); \
|
||||
if ((i2cp)->thread != NULL) { \
|
||||
Thread *tp = (i2cp)->thread; \
|
||||
(i2cp)->thread = NULL; \
|
||||
chSchReadyI(tp); \
|
||||
} \
|
||||
chSysUnlockFromIsr(); \
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Wakes up the waiting thread in case of errors.
|
||||
*
|
||||
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
#define i2c_lld_error_wakeup_isr(i2cp) { \
|
||||
chSysLockFromIsr(); \
|
||||
if ((i2cp)->thread != NULL) { \
|
||||
Thread *tp = (i2cp)->thread; \
|
||||
(i2cp)->thread = NULL; \
|
||||
tp->p_u.rdymsg = RDY_RESET; \
|
||||
chSchReadyI(tp); \
|
||||
} \
|
||||
chSysUnlockFromIsr(); \
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Common ISR code.
|
||||
*
|
||||
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
#define i2c_lld_isr_code(i2cp) { \
|
||||
i2c_lld_wakeup_isr(i2cp); \
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Error ISR code.
|
||||
*
|
||||
* @param[in] i2cp pointer to the @p I2CDriver object
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
#define i2c_lld_isr_err_code(i2cp) { \
|
||||
i2c_lld_error_wakeup_isr(i2cp); \
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Get errors from I2C driver.
|
||||
*
|
||||
|
|
@ -473,22 +396,21 @@ extern I2CDriver I2CD2;
|
|||
#if STM32_I2C_USE_I2C3
|
||||
extern I2CDriver I2CD3;
|
||||
#endif
|
||||
#endif
|
||||
#endif /* !defined(__DOXYGEN__) */
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
void i2c_lld_init(void);
|
||||
void i2c_lld_reset(I2CDriver *i2cp);
|
||||
void i2c_lld_start(I2CDriver *i2cp);
|
||||
void i2c_lld_stop(I2CDriver *i2cp);
|
||||
msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
||||
const uint8_t *txbuf, size_t txbytes,
|
||||
uint8_t *rxbuf, size_t rxbytes,
|
||||
systime_t timeout);
|
||||
msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
||||
uint8_t *rxbuf, size_t rxbytes,
|
||||
systime_t timeout);
|
||||
void i2c_lld_init(void);
|
||||
void i2c_lld_start(I2CDriver *i2cp);
|
||||
void i2c_lld_stop(I2CDriver *i2cp);
|
||||
msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
||||
const uint8_t *txbuf, size_t txbytes,
|
||||
uint8_t *rxbuf, size_t rxbytes,
|
||||
systime_t timeout);
|
||||
msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
|
||||
uint8_t *rxbuf, size_t rxbytes,
|
||||
systime_t timeout);
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -17,15 +17,20 @@
|
|||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
/*
|
||||
Parts of this file have been contributed by Matthias Blaicher.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @file spi.c
|
||||
* @file mmc_spi.c
|
||||
* @brief MMC over SPI driver code.
|
||||
*
|
||||
* @addtogroup MMC_SPI
|
||||
* @{
|
||||
*/
|
||||
|
||||
#include <string.h>
|
||||
|
||||
#include "ch.h"
|
||||
#include "hal.h"
|
||||
|
||||
|
|
@ -43,10 +48,53 @@
|
|||
/* Driver local variables. */
|
||||
/*===========================================================================*/
|
||||
|
||||
/**
|
||||
* @brief Lookup table for CRC-7 ( based on polynomial x^7 + x^3 + 1).
|
||||
*/
|
||||
static const uint8_t crc7_lookup_table[256] = {
|
||||
0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53,
|
||||
0x6c, 0x65, 0x7e, 0x77, 0x19, 0x10, 0x0b, 0x02, 0x3d, 0x34, 0x2f, 0x26,
|
||||
0x51, 0x58, 0x43, 0x4a, 0x75, 0x7c, 0x67, 0x6e, 0x32, 0x3b, 0x20, 0x29,
|
||||
0x16, 0x1f, 0x04, 0x0d, 0x7a, 0x73, 0x68, 0x61, 0x5e, 0x57, 0x4c, 0x45,
|
||||
0x2b, 0x22, 0x39, 0x30, 0x0f, 0x06, 0x1d, 0x14, 0x63, 0x6a, 0x71, 0x78,
|
||||
0x47, 0x4e, 0x55, 0x5c, 0x64, 0x6d, 0x76, 0x7f, 0x40, 0x49, 0x52, 0x5b,
|
||||
0x2c, 0x25, 0x3e, 0x37, 0x08, 0x01, 0x1a, 0x13, 0x7d, 0x74, 0x6f, 0x66,
|
||||
0x59, 0x50, 0x4b, 0x42, 0x35, 0x3c, 0x27, 0x2e, 0x11, 0x18, 0x03, 0x0a,
|
||||
0x56, 0x5f, 0x44, 0x4d, 0x72, 0x7b, 0x60, 0x69, 0x1e, 0x17, 0x0c, 0x05,
|
||||
0x3a, 0x33, 0x28, 0x21, 0x4f, 0x46, 0x5d, 0x54, 0x6b, 0x62, 0x79, 0x70,
|
||||
0x07, 0x0e, 0x15, 0x1c, 0x23, 0x2a, 0x31, 0x38, 0x41, 0x48, 0x53, 0x5a,
|
||||
0x65, 0x6c, 0x77, 0x7e, 0x09, 0x00, 0x1b, 0x12, 0x2d, 0x24, 0x3f, 0x36,
|
||||
0x58, 0x51, 0x4a, 0x43, 0x7c, 0x75, 0x6e, 0x67, 0x10, 0x19, 0x02, 0x0b,
|
||||
0x34, 0x3d, 0x26, 0x2f, 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c,
|
||||
0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04, 0x6a, 0x63, 0x78, 0x71,
|
||||
0x4e, 0x47, 0x5c, 0x55, 0x22, 0x2b, 0x30, 0x39, 0x06, 0x0f, 0x14, 0x1d,
|
||||
0x25, 0x2c, 0x37, 0x3e, 0x01, 0x08, 0x13, 0x1a, 0x6d, 0x64, 0x7f, 0x76,
|
||||
0x49, 0x40, 0x5b, 0x52, 0x3c, 0x35, 0x2e, 0x27, 0x18, 0x11, 0x0a, 0x03,
|
||||
0x74, 0x7d, 0x66, 0x6f, 0x50, 0x59, 0x42, 0x4b, 0x17, 0x1e, 0x05, 0x0c,
|
||||
0x33, 0x3a, 0x21, 0x28, 0x5f, 0x56, 0x4d, 0x44, 0x7b, 0x72, 0x69, 0x60,
|
||||
0x0e, 0x07, 0x1c, 0x15, 0x2a, 0x23, 0x38, 0x31, 0x46, 0x4f, 0x54, 0x5d,
|
||||
0x62, 0x6b, 0x70, 0x79
|
||||
};
|
||||
|
||||
/*===========================================================================*/
|
||||
/* Driver local functions. */
|
||||
/*===========================================================================*/
|
||||
|
||||
/**
|
||||
* @brief Calculate the MMC standard CRC-7 based on a lookup table.
|
||||
*
|
||||
* @param[in] crc start value for CRC
|
||||
* @param[in] buffer pointer to data buffer
|
||||
* @param[in] len length of data
|
||||
* @return Calculated CRC
|
||||
*/
|
||||
static uint8_t crc7(uint8_t crc, const uint8_t *buffer, size_t len) {
|
||||
|
||||
while (len--)
|
||||
crc = crc7_lookup_table[(crc << 1) ^ (*buffer++)];
|
||||
return crc;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Inserion monitor timer callback function.
|
||||
*
|
||||
|
|
@ -109,15 +157,15 @@ static void wait(MMCDriver *mmcp) {
|
|||
* @brief Sends a command header.
|
||||
*
|
||||
* @param[in] mmcp pointer to the @p MMCDriver object
|
||||
* @param cmd[in] the command id
|
||||
* @param arg[in] the command argument
|
||||
* @param[in] cmd the command id
|
||||
* @param[in] arg the command argument
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
static void send_hdr(MMCDriver *mmcp, uint8_t cmd, uint32_t arg) {
|
||||
uint8_t buf[6];
|
||||
|
||||
/* Wait for the bus to become idle if a write operation was in progress. */
|
||||
/* Wait for the bus to become idle if a write operation was in progress.*/
|
||||
wait(mmcp);
|
||||
|
||||
buf[0] = 0x40 | cmd;
|
||||
|
|
@ -125,7 +173,9 @@ static void send_hdr(MMCDriver *mmcp, uint8_t cmd, uint32_t arg) {
|
|||
buf[2] = arg >> 16;
|
||||
buf[3] = arg >> 8;
|
||||
buf[4] = arg;
|
||||
buf[5] = 0x95; /* Valid for CMD0 ignored by other commands. */
|
||||
/* Calculate CRC for command header, shift to right position, add stop bit.*/
|
||||
buf[5] = ((crc7(0, buf, 5) & 0x7F) << 1) | 0x01;
|
||||
|
||||
spiSend(mmcp->spip, 6, buf);
|
||||
}
|
||||
|
||||
|
|
@ -150,18 +200,37 @@ static uint8_t recvr1(MMCDriver *mmcp) {
|
|||
return 0xFF;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Receives a three byte response.
|
||||
*
|
||||
* @param[in] mmcp pointer to the @p MMCDriver object
|
||||
* @param[out] buffer pointer to four bytes wide buffer
|
||||
* @return First response byte as an @p uint8_t value.
|
||||
* @retval 0xFF timed out.
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
static uint8_t recvr3(MMCDriver *mmcp, uint8_t* buffer) {
|
||||
uint8_t r1;
|
||||
|
||||
r1 = recvr1(mmcp);
|
||||
spiReceive(mmcp->spip, 4, buffer);
|
||||
|
||||
return r1;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Sends a command an returns a single byte response.
|
||||
*
|
||||
* @param[in] mmcp pointer to the @p MMCDriver object
|
||||
* @param cmd[in] the command id
|
||||
* @param arg[in] the command argument
|
||||
* @param[in] cmd the command id
|
||||
* @param[in] arg the command argument
|
||||
* @return The response as an @p uint8_t value.
|
||||
* @retval 0xFF timed out.
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
static uint8_t send_command(MMCDriver *mmcp, uint8_t cmd, uint32_t arg) {
|
||||
static uint8_t send_command_R1(MMCDriver *mmcp, uint8_t cmd, uint32_t arg) {
|
||||
uint8_t r1;
|
||||
|
||||
spiSelect(mmcp->spip);
|
||||
|
|
@ -171,6 +240,30 @@ static uint8_t send_command(MMCDriver *mmcp, uint8_t cmd, uint32_t arg) {
|
|||
return r1;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Sends a command which returns a five bytes response (R3).
|
||||
*
|
||||
* @param[in] mmcp pointer to the @p MMCDriver object
|
||||
* @param[in] cmd the command id
|
||||
* @param[in] arg the command argument
|
||||
* @param[out] response pointer to four bytes wide uint8_t buffer
|
||||
* @return The first byte of the response (R1) as an @p
|
||||
* uint8_t value.
|
||||
* @retval 0xFF timed out.
|
||||
*
|
||||
* @notapi
|
||||
*/
|
||||
static uint8_t send_command_R3(MMCDriver *mmcp, uint8_t cmd, uint32_t arg,
|
||||
uint8_t *response) {
|
||||
uint8_t r1;
|
||||
|
||||
spiSelect(mmcp->spip);
|
||||
send_hdr(mmcp, cmd, arg);
|
||||
r1 = recvr3(mmcp, response);
|
||||
spiUnselect(mmcp->spip);
|
||||
return r1;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Waits that the card reaches an idle state.
|
||||
*
|
||||
|
|
@ -233,6 +326,7 @@ void mmcObjectInit(MMCDriver *mmcp, SPIDriver *spip,
|
|||
mmcp->hscfg = hscfg;
|
||||
mmcp->is_protected = is_protected;
|
||||
mmcp->is_inserted = is_inserted;
|
||||
mmcp->block_addresses = FALSE;
|
||||
chEvtInit(&mmcp->inserted_event);
|
||||
chEvtInit(&mmcp->removed_event);
|
||||
}
|
||||
|
|
@ -315,17 +409,47 @@ bool_t mmcConnect(MMCDriver *mmcp) {
|
|||
/* SPI mode selection.*/
|
||||
i = 0;
|
||||
while (TRUE) {
|
||||
if (send_command(mmcp, MMC_CMDGOIDLE, 0) == 0x01)
|
||||
if (send_command_R1(mmcp, MMC_CMDGOIDLE, 0) == 0x01)
|
||||
break;
|
||||
if (++i >= MMC_CMD0_RETRY)
|
||||
return TRUE;
|
||||
chThdSleepMilliseconds(10);
|
||||
}
|
||||
|
||||
/* Try to detect if this is a high capacity card and switch to block
|
||||
* addresses if possible.
|
||||
*
|
||||
* This method is based on "How to support SDC Ver2 and high capacity cards"
|
||||
* by ElmChan.
|
||||
*
|
||||
* */
|
||||
uint8_t r3[4];
|
||||
if(send_command_R3(mmcp, MMC_CMDINTERFACE_CONDITION, 0x01AA, r3) != 0x05){
|
||||
|
||||
/* Switch to SDHC mode */
|
||||
i = 0;
|
||||
while (TRUE) {
|
||||
if ((send_command_R1(mmcp, MMC_CMDAPP, 0) == 0x01) &&
|
||||
(send_command_R3(mmcp, MMC_ACMDOPCONDITION, 0x400001aa, r3) == 0x00))
|
||||
break;
|
||||
|
||||
if (++i >= MMC_ACMD41_RETRY)
|
||||
return TRUE;
|
||||
chThdSleepMilliseconds(10);
|
||||
}
|
||||
|
||||
/* Execute dedicated read on OCR register */
|
||||
send_command_R3(mmcp, MMC_CMDREADOCR, 0, r3);
|
||||
|
||||
/* Check if CCS is set in response. Card operates in block mode if set */
|
||||
if(r3[0] & 0x40)
|
||||
mmcp->block_addresses = TRUE;
|
||||
}
|
||||
|
||||
/* Initialization. */
|
||||
i = 0;
|
||||
while (TRUE) {
|
||||
uint8_t b = send_command(mmcp, MMC_CMDINIT, 0);
|
||||
uint8_t b = send_command_R1(mmcp, MMC_CMDINIT, 0);
|
||||
if (b == 0x00)
|
||||
break;
|
||||
if (b != 0x01)
|
||||
|
|
@ -339,7 +463,7 @@ bool_t mmcConnect(MMCDriver *mmcp) {
|
|||
spiStart(mmcp->spip, mmcp->hscfg);
|
||||
|
||||
/* Setting block size.*/
|
||||
if (send_command(mmcp, MMC_CMDSETBLOCKLEN, MMC_SECTOR_SIZE) != 0x00)
|
||||
if (send_command_R1(mmcp, MMC_CMDSETBLOCKLEN, MMC_SECTOR_SIZE) != 0x00)
|
||||
return TRUE;
|
||||
|
||||
/* Transition to MMC_READY state (if not extracted).*/
|
||||
|
|
@ -419,7 +543,12 @@ bool_t mmcStartSequentialRead(MMCDriver *mmcp, uint32_t startblk) {
|
|||
|
||||
spiStart(mmcp->spip, mmcp->hscfg);
|
||||
spiSelect(mmcp->spip);
|
||||
send_hdr(mmcp, MMC_CMDREADMULTIPLE, startblk * MMC_SECTOR_SIZE);
|
||||
|
||||
if(mmcp->block_addresses)
|
||||
send_hdr(mmcp, MMC_CMDREADMULTIPLE, startblk);
|
||||
else
|
||||
send_hdr(mmcp, MMC_CMDREADMULTIPLE, startblk * MMC_SECTOR_SIZE);
|
||||
|
||||
if (recvr1(mmcp) != 0x00) {
|
||||
spiUnselect(mmcp->spip);
|
||||
chSysLock();
|
||||
|
|
@ -534,7 +663,12 @@ bool_t mmcStartSequentialWrite(MMCDriver *mmcp, uint32_t startblk) {
|
|||
|
||||
spiStart(mmcp->spip, mmcp->hscfg);
|
||||
spiSelect(mmcp->spip);
|
||||
send_hdr(mmcp, MMC_CMDWRITEMULTIPLE, startblk * MMC_SECTOR_SIZE);
|
||||
if(mmcp->block_addresses)
|
||||
send_hdr(mmcp, MMC_CMDWRITEMULTIPLE, startblk);
|
||||
else
|
||||
send_hdr(mmcp, MMC_CMDWRITEMULTIPLE, startblk * MMC_SECTOR_SIZE);
|
||||
|
||||
|
||||
if (recvr1(mmcp) != 0x00) {
|
||||
spiUnselect(mmcp->spip);
|
||||
chSysLock();
|
||||
|
|
|
|||
|
|
@ -79,6 +79,8 @@
|
|||
- FIX: Fixed SYSCFG clock not started in STM32L1/F4 HALs (bug 3449139).
|
||||
- FIX: Fixed wrong definitions in STM32L-Discovery board file (bug 3449076).
|
||||
- OPT: Improved the exception exit code in the GCC Cortex-Mx ports.
|
||||
- NEW: MMC over SPI driver improved to handle high capacity cards, by
|
||||
Matthias Blaicher.
|
||||
- NEW: Added PVD support to the HAL of all STM32s, by Barthess.
|
||||
- NEW: Added to the HAL driver the handling of an abstract realtime free
|
||||
running counter, added the capability to all the STM32 HALs.
|
||||
|
|
|
|||
Loading…
Reference in New Issue