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I2C. Added template of synchronouse deriver. It does not work for a moment. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/i2c_dev@3190 35acf78f-673a-0410-8e92-d51de3d6d3f4
master
barthess 2011-08-05 17:24:23 +00:00
parent 4bcff1c283
commit 6ee04cf232
12 changed files with 291 additions and 136 deletions
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1
os/hal/include/i2c.h
View File

@ -270,6 +270,7 @@ extern "C" {
void i2cAcquireBus(I2CDriver *i2cp);
void i2cReleaseBus(I2CDriver *i2cp);
#endif /* I2C_USE_MUTUAL_EXCLUSION */
#ifdef __cplusplus
}
#endif

242
os/hal/platforms/STM32/i2c_lld.c
View File

@ -29,7 +29,7 @@
/* TODO: may be? move this defines in i2c_lld.h and mcuconf.h */
#define I2C_STOP_GPT_TIMEOUT 50 /* waiting timer value */
#define I2C_START_GPT_TIMEOUT 50 /* waiting timer value */
#define I2C_POLLING_TIMEOUT 0xFFFF /* timeout for syncronouse driver */
#define I2C_POLLING_TIMEOUT 0xFFFF
/*===========================================================================*/
/* Driver exported variables. */
@ -58,15 +58,16 @@ static volatile uint16_t dbgCR2 = 0;
#endif /* CH_DBG_ENABLE_ASSERTS */
/* defines for convenience purpose */
#if I2C_SUPPORTS_CALLBACKS
#define txBuffp (i2cp->txbuff_p)
#define rxBuffp (i2cp->rxbuff_p)
#endif /* I2C_SUPPORTS_CALLBACKS */
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
#if STM32_I2C_I2C1_USE_POLLING_WAIT
#else
#if I2C_SUPPORTS_CALLBACKS
#if !(STM32_I2C_I2C1_USE_POLLING_WAIT)
/* I2C1 GPT callback. */
static void i2c1gptcb(GPTDriver *gptp) {
(void)gptp;
@ -100,8 +101,7 @@ static const GPTConfig i2c1gptcfg = {
};
#endif /* STM32_I2C_I2C1_USE_POLLING_WAIT */
#if STM32_I2C_I2C2_USE_POLLING_WAIT
#else
#if !(STM32_I2C_I2C2_USE_POLLING_WAIT)
/* I2C2 GPT callback. */
static void i2c2gptcb(GPTDriver *gptp) {
(void)gptp;
@ -134,6 +134,7 @@ static const GPTConfig i2c2gptcfg = {
i2c2gptcb /* Timer callback.*/
};
#endif /* STM32_I2C_I2C2_USE_POLLING_WAIT */
#endif /* I2C_SUPPORTS_CALLBACKS */
/**
* @brief Function for I2C debugging purpose.
@ -155,6 +156,7 @@ void _i2c_unhandled_case(I2CDriver *i2cp){
#define _i2c_unhandled_case(i2cp)
#endif /* CH_DBG_ENABLE_ASSERTS */
#if I2C_SUPPORTS_CALLBACKS
/**
* @brief Return the last event value from I2C status registers.
* @note Internal use only.
@ -372,7 +374,7 @@ static void i2c_serve_event_interrupt(I2CDriver *i2cp) {
break;
}
}
#endif /* I2C_SUPPORTS_CALLBACKS */
static void i2c_serve_error_interrupt(I2CDriver *i2cp) {
i2cflags_t flags;
@ -417,7 +419,9 @@ static void i2c_serve_error_interrupt(I2CDriver *i2cp) {
chSysLockFromIsr();
i2cAddFlagsI(i2cp, flags);
chSysUnlockFromIsr();
#if I2C_SUPPORTS_CALLBACKS
_i2c_isr_err_code(i2cp, i2cp->id_slave_config);
#endif /* I2C_SUPPORTS_CALLBACKS */
}
}
@ -426,13 +430,14 @@ static void i2c_serve_error_interrupt(I2CDriver *i2cp) {
/**
* @brief I2C1 event interrupt handler.
*/
#if I2C_SUPPORTS_CALLBACKS
CH_IRQ_HANDLER(VectorBC) {
CH_IRQ_PROLOGUE();
i2c_serve_event_interrupt(&I2CD1);
CH_IRQ_EPILOGUE();
}
#endif /* I2C_SUPPORTS_CALLBACKS */
/**
* @brief I2C1 error interrupt handler.
*/
@ -442,19 +447,20 @@ CH_IRQ_HANDLER(VectorC0) {
i2c_serve_error_interrupt(&I2CD1);
CH_IRQ_EPILOGUE();
}
#endif
#endif /* STM32_I2C_USE_I2C1 */
#if STM32_I2C_USE_I2C2 || defined(__DOXYGEN__)
/**
* @brief I2C2 event interrupt handler.
*/
#if I2C_SUPPORTS_CALLBACKS
CH_IRQ_HANDLER(VectorC4) {
CH_IRQ_PROLOGUE();
i2c_serve_event_interrupt(&I2CD2);
CH_IRQ_EPILOGUE();
}
#endif /* I2C_SUPPORTS_CALLBACKS */
/**
* @brief I2C2 error interrupt handler.
*/
@ -464,7 +470,7 @@ CH_IRQ_HANDLER(VectorC8) {
i2c_serve_error_interrupt(&I2CD2);
CH_IRQ_EPILOGUE();
}
#endif
#endif /* STM32_I2C_USE_I2C2 */
/**
* @brief Low level I2C driver initialization.
@ -477,13 +483,12 @@ void i2c_lld_init(void) {
i2cObjectInit(&I2CD1);
I2CD1.id_i2c = I2C1;
#if STM32_I2C_I2C1_USE_POLLING_WAIT
I2CD1.timer = NULL;
I2CD1.timer_cfg = NULL;
#else
#if I2C_SUPPORTS_CALLBACKS
#if !(STM32_I2C_I2C1_USE_POLLING_WAIT)
I2CD1.timer = &(STM32_I2C_I2C1_USE_GPT_TIM);
I2CD1.timer_cfg = &i2c1gptcfg;
#endif /* !(STM32_I2C_I2C1_USE_POLLING_WAIT) */
#endif /* I2C_SUPPORTS_CALLBACKS */
#endif /* STM32_I2C_USE_I2C */
@ -493,13 +498,12 @@ void i2c_lld_init(void) {
i2cObjectInit(&I2CD2);
I2CD2.id_i2c = I2C2;
#if STM32_I2C_I2C2_USE_POLLING_WAIT
I2CD2.timer = NULL;
I2CD2.timer_cfg = NULL;
#else
#if I2C_SUPPORTS_CALLBACKS
#if !(STM32_I2C_I2C2_USE_POLLING_WAIT)
I2CD2.timer = &(STM32_I2C_I2C2_USE_GPT_TIM);
I2CD2.timer_cfg = &i2c2gptcfg;
#endif /* !(STM32_I2C_I2C2_USE_POLLING_WAIT) */
#endif /* I2C_SUPPORTS_CALLBACKS */
#endif /* STM32_I2C_USE_I2C2 */
}
@ -510,14 +514,17 @@ void i2c_lld_init(void) {
* @param[in] i2cp pointer to the @p I2CDriver object
*/
void i2c_lld_start(I2CDriver *i2cp) {
if (i2cp->timer != NULL || i2cp->timer_cfg != NULL)
#if (!(STM32_I2C_I2C2_USE_POLLING_WAIT) && I2C_SUPPORTS_CALLBACKS)
gptStart(i2cp->timer, i2cp->timer_cfg);
#endif /* !(STM32_I2C_I2C2_USE_POLLING_WAIT) */
if (i2cp->id_state == I2C_STOP) { /* If in stopped state then enables the I2C clock.*/
#if STM32_I2C_USE_I2C1
if (&I2CD1 == i2cp) {
#if I2C_SUPPORTS_CALLBACKS
NVICEnableVector(I2C1_EV_IRQn,
CORTEX_PRIORITY_MASK(STM32_I2C_I2C1_IRQ_PRIORITY));
#endif /* I2C_SUPPORTS_CALLBACKS */
NVICEnableVector(I2C1_ER_IRQn,
CORTEX_PRIORITY_MASK(STM32_I2C_I2C1_IRQ_PRIORITY));
RCC->APB1ENR |= RCC_APB1ENR_I2C1EN; /* I2C 1 clock enable */
@ -525,8 +532,10 @@ void i2c_lld_start(I2CDriver *i2cp) {
#endif
#if STM32_I2C_USE_I2C2
if (&I2CD2 == i2cp) {
#if I2C_SUPPORTS_CALLBACKS
NVICEnableVector(I2C2_EV_IRQn,
CORTEX_PRIORITY_MASK(STM32_I2C_I2C1_IRQ_PRIORITY));
#endif /* I2C_SUPPORTS_CALLBACKS */
NVICEnableVector(I2C2_ER_IRQn,
CORTEX_PRIORITY_MASK(STM32_I2C_I2C1_IRQ_PRIORITY));
RCC->APB1ENR |= RCC_APB1ENR_I2C2EN; /* I2C 2 clock enable */
@ -690,6 +699,8 @@ void i2c_lld_stop(I2CDriver *i2cp) {
i2cp->id_state = I2C_STOP;
}
#if I2C_SUPPORTS_CALLBACKS
/**
* @brief Transmits data via the I2C bus as master.
*
@ -709,7 +720,6 @@ void i2c_lld_master_transmit(I2CDriver *i2cp, uint16_t slave_addr,
/* "waiting" for STOP bit routine*/
#if STM32_I2C_I2C1_USE_POLLING_WAIT
uint32_t timeout = I2C_POLLING_TIMEOUT;
/* TODO: timeout and Assert here */
while((i2cp->id_i2c->CR1 & I2C_CR1_STOP) && timeout)
timeout--;
chDbgAssert((timeout > 0), "i2c_lld_master_transmit(), #1", "time to STOP is out");
@ -747,7 +757,6 @@ void i2c_lld_master_transmit(I2CDriver *i2cp, uint16_t slave_addr,
i2cp->id_i2c->CR2 |= (I2C_CR2_ITERREN|I2C_CR2_ITEVTEN|I2C_CR2_ITBUFEN); /* enable ERR, EVT & BUF ITs */
}
/**
* @brief Receives data from the I2C bus.
*
@ -874,6 +883,195 @@ void i2c_lld_master_transceive(I2CDriver *i2cp){
i2cp->id_i2c->CR2 |= (I2C_CR2_ITERREN|I2C_CR2_ITEVTEN|I2C_CR2_ITBUFEN); /* enable ERR, EVT & BUF ITs */
}
#else /*I2C_SUPPORTS_CALLBACKS*/
/**
* @brief Synchronously transmits data via the I2C bus as master.
*
* @param[in] i2cp pointer to the @p I2CDriver object
* @param[in] slave_addr Slave device address. Bits 0-9 contain slave
* device address. Bit 15 must be set to 1 if 10-bit
* addressing modes used. Otherwise keep it cleared.
* Bits 10-14 unused.
* @param[in] txbuf pointer to the transmit buffer
* @param[in] txbytes number of bytes to be transmitted
* @param[in] rxbuf pointer to the receive buffer
* @param[in] rxbytes number of bytes to be received
*/
void i2c_lld_master_transmit(I2CDriver *i2cp, uint16_t slave_addr,
uint8_t *txbuf, size_t txbytes, uint8_t *rxbuf, size_t rxbytes) {
/* init driver fields */
i2cp->slave_addr = slave_addr;
i2cp->txbytes = txbytes;
i2cp->rxbytes = rxbytes;
i2cp->txbuf = txbuf;
i2cp->rxbuf = rxbuf;
/* init address fields */
if(slave_addr & 0x8000){ /* 10-bit mode used */
i2cp->slave_addr1 = ((slave_addr >>7) & 0x0006); /* add the two msb of 10-bit address to the header */
i2cp->slave_addr1 |= 0xF0; /* add the header bits with LSB = 0 -> write */
i2cp->slave_addr2 = slave_addr & 0x00FF; /* the remaining 8 bit of 10-bit address */
}
else{
i2cp->slave_addr1 = ((slave_addr <<1) & 0x00FE); /* LSB = 0 -> write */
}
i2cp->flags = 0;
i2cp->errors = 0;
i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
i2cp->id_i2c->CR2 &= ~I2C_CR2_ITEVTEN; /* disable event interrupts */
i2cp->id_i2c->CR2 |= I2C_CR2_ITERREN; /* enable error interrupts */
i2cp->id_i2c->CR1 |= I2C_CR1_START;
while (!(i2cp->id_i2c->SR1 & I2C_SR1_SB))
;
i2cp->id_i2c->DR = i2cp->slave_addr1;
while (!(i2cp->id_i2c->SR1 & I2C_SR1_ADDR))
;
while (!(i2cp->id_i2c->SR2 & I2C_SR2_BUSY))
;
i2cp->id_i2c->DR = *txbuf;
txbuf++;
i2cp->txbytes--;
while(i2cp->txbytes > 0){
while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))
;
i2cp->id_i2c->DR = *txbuf;
txbuf++;
i2cp->txbytes--;
}
while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))
;
if(rxbytes == 0){
i2cp->id_i2c->CR1 |= I2C_CR1_STOP;
while (i2cp->id_i2c->CR1 & I2C_CR1_STOP)
;
}
else{
i2c_lld_master_receive(i2cp, slave_addr, rxbuf, rxbytes);
}
}
/**
* @brief Synchronously receives data from the I2C bus.
*
* @param[in] i2cp pointer to the @p I2CDriver object
* @param[in] slave_addr Slave device address. Bits 0-9 contain slave
* device address. Bit 15 must be set to 1 if 10-bit
* addressing modes used. Otherwise keep it cleared.
* Bits 10-14 unused.
* @param[in] rxbuf pointer to the receive buffer
* @param[in] rxbytes number of bytes to be received
*/
void i2c_lld_master_receive(I2CDriver *i2cp, uint16_t slave_addr,
uint8_t *rxbuf, size_t rxbytes){
/* init driver fields */
i2cp->slave_addr = slave_addr;
i2cp->rxbytes = rxbytes;
i2cp->rxbuf = rxbuf;
/* init address fields */
if(slave_addr & 0x8000){ /* 10-bit mode used */
i2cp->slave_addr1 = ((slave_addr >>7) & 0x0006); /* add the two msb of 10-bit address to the header */
i2cp->slave_addr1 |= 0xF0; /* add the header bits (the LSB -> 1 will be add to second */
i2cp->slave_addr2 = slave_addr & 0x00FF; /* the remaining 8 bit of 10-bit address */
}
else{
i2cp->slave_addr1 = ((slave_addr <<1) | 0x01); /* LSB = 1 -> receive */
}
/* setting flags and register bits */
i2cp->flags = 0;
i2cp->errors = 0;
i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
i2cp->id_i2c->CR2 &= ~I2C_CR2_ITEVTEN; /* disable event interrupts */
i2cp->id_i2c->CR2 |= I2C_CR2_ITERREN; /* enable error interrupts */
i2cp->id_i2c->CR1 |= I2C_CR1_START;
while (!(i2cp->id_i2c->SR1 & I2C_SR1_SB))
;
i2cp->id_i2c->DR = i2cp->slave_addr1;
while (!(i2cp->id_i2c->SR1 & I2C_SR1_ADDR))
;
if(i2cp->rxbytes >= 3){ /* more than 2 bytes receiving procedure */
while(!(i2cp->id_i2c->SR2 & I2C_SR2_BUSY)) /* to clear ADDR bit */
;
while(i2cp->rxbytes > 3){
while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))
;
*rxbuf = i2cp->id_i2c->DR;
rxbuf++;
i2cp->rxbytes--;
}
while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF)) /* stopping procedure */
;
i2cp->id_i2c->CR1 &= ~I2C_CR1_ACK;
chSysLock();
i2cp->id_i2c->CR1 |= I2C_CR1_STOP;
*rxbuf = i2cp->id_i2c->DR;
rxbuf++;
i2cp->rxbytes--;
chSysUnlock();
while(!(i2cp->id_i2c->SR1 & I2C_SR1_RXNE))
;
*rxbuf = i2cp->id_i2c->DR;
rxbuf++;
i2cp->rxbytes--;
while (i2cp->id_i2c->CR1 & I2C_CR1_STOP)
;
i2cp->id_i2c->CR1 |= I2C_CR1_ACK;
}
else{ /* 1 or 2 bytes receiving procedure */
if(i2cp->rxbytes == 2){
i2cp->id_i2c->CR1 |= I2C_CR1_POS;
chSysLock();
while(!(i2cp->id_i2c->SR2 & I2C_SR2_BUSY)) /* to clear ADDR bit */
;
i2cp->id_i2c->CR1 &= ~I2C_CR1_ACK;
chSysUnlock();
while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))
;
chSysLock();
i2cp->id_i2c->CR1 |= I2C_CR1_STOP;
*rxbuf = i2cp->id_i2c->DR;
rxbuf++;
i2cp->rxbytes--;
chSysUnlock();
*rxbuf = i2cp->id_i2c->DR;
rxbuf++;
i2cp->rxbytes--;
while (i2cp->id_i2c->CR1 & I2C_CR1_STOP)
;
i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
i2cp->id_i2c->CR1 |= I2C_CR1_ACK;
}
else{ /* 1 byte */
i2cp->id_i2c->CR1 &= ~I2C_CR1_ACK;
chSysLock();
while(!(i2cp->id_i2c->SR2 & I2C_SR2_BUSY)) /* to clear ADDR bit */
;
i2cp->id_i2c->CR1 |= I2C_CR1_STOP;
chSysUnlock();
while(!(i2cp->id_i2c->SR1 & I2C_SR1_RXNE))
;
*rxbuf = i2cp->id_i2c->DR;
rxbuf++;
i2cp->rxbytes--;
while (i2cp->id_i2c->CR1 & I2C_CR1_STOP)
;
i2cp->id_i2c->CR1 |= I2C_CR1_ACK;
}
}
}
#endif /* I2C_SUPPORTS_CALLBACKS */
#undef rxBuffp
#undef txBuffp

19
os/hal/platforms/STM32/i2c_lld.h
View File

@ -13,11 +13,17 @@
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define I2C_START_TIMEOUT 0xFFFF
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief Switch between callback based and synchronouse driver.
* @note The default is synchronouse.
*/
#if !defined(I2C_SUPPORTS_CALLBACKS) || defined(__DOXYGEN__)
#define I2C_SUPPORTS_CALLBACKS FALSE
#endif
/**
* @brief I2C1 driver synchronization choice between GPT and polling.
@ -161,6 +167,7 @@ struct I2CDriver{
* @brief Driver state.
*/
i2cstate_t id_state;
#if I2C_USE_WAIT
/**
* @brief Thread waiting for I/O completion.
@ -177,6 +184,7 @@ struct I2CDriver{
Semaphore id_semaphore;
#endif
#endif /* I2C_USE_MUTUAL_EXCLUSION */
/**
* @brief Current configuration data.
*/
@ -198,7 +206,7 @@ struct I2CDriver{
uint16_t slave_addr; /*!< @brief Current slave address. */
uint8_t slave_addr1;/*!< @brief 7-bit address of the slave with r\w bit.*/
uint8_t slave_addr2;/*!< @brief Used in 10-bit address mode. */
uint8_t slave_addr2;/*!< @brief Uses in 10-bit address mode. */
EventSource sevent; /*!< @brief Status Change @p EventSource.*/
@ -209,6 +217,8 @@ struct I2CDriver{
*/
I2C_TypeDef *id_i2c;
#if !(STM32_I2C_I2C1_USE_POLLING_WAIT)
/* TODO: capability to switch this GPT fields off */
/**
* @brief Timer for waiting STOP condition on the bus.
* @details This is workaround for STM32 buggy I2C cell.
@ -219,7 +229,8 @@ struct I2CDriver{
* @brief Config for workaround timer.
*/
const GPTConfig *timer_cfg;
} ;
#endif /* !(STM32_I2C_I2C1_USE_POLLING_WAIT) */
};
/*===========================================================================*/
@ -235,7 +246,7 @@ struct I2CDriver{
* does not block thread, only if slave not response it does.
*/
#define i2c_lld_wait_bus_free(i2cp) { \
uint32_t tmo = 0xffff; \
uint32_t tmo = 0xfffff; \
while((i2cp->id_i2c->SR2 & I2C_SR2_BUSY) && tmo--) \
; \
}

8
os/hal/src/i2c.c
View File

@ -178,7 +178,11 @@ void i2cMasterTransmit(I2CDriver *i2cp,
i2cp->id_state = I2C_ACTIVE_TRANSMIT;
i2c_lld_master_transmit(i2cp, slave_addr, txbuf, txbytes, rxbuf, rxbytes);
#if I2C_SUPPORTS_CALLBACKS
_i2c_wait_s(i2cp);
#else
i2cp->id_state = I2C_READY;
#endif /* I2C_SUPPORTS_CALLBACKS */
}
/**
@ -216,7 +220,11 @@ void i2cMasterReceive(I2CDriver *i2cp,
i2cp->id_state = I2C_ACTIVE_RECEIVE;
i2c_lld_master_receive(i2cp, slave_addr, rxbuf, rxbytes);
#if I2C_SUPPORTS_CALLBACKS
_i2c_wait_s(i2cp);
#else
i2cp->id_state = I2C_READY;
#endif /* I2C_SUPPORTS_CALLBACKS */
}

2
testhal/STM32/I2C/chconf.h
View File

@ -188,7 +188,7 @@
* @note The default is @p TRUE.
*/
#if !defined(CH_USE_MUTEXES) || defined(__DOXYGEN__)
#define CH_USE_MUTEXES FALSE
#define CH_USE_MUTEXES TRUE
#endif
/**

9
testhal/STM32/I2C/halconf.h
View File

@ -178,7 +178,7 @@
* @note Disabling this option saves both code and data space.
*/
#if !defined(I2C_USE_WAIT) || defined(__DOXYGEN__)
#define I2C_USE_WAIT TRUE
#define I2C_USE_WAIT FALSE
#endif
/**
@ -188,6 +188,13 @@
#define I2C_USE_MUTUAL_EXCLUSION TRUE
#endif
/**
* @brief Switch to asynchronouse driver with callbacks.
*/
#if !defined(I2C_SUPPORTS_CALLBACKS) || defined(__DOXYGEN__)
#define I2C_SUPPORTS_CALLBACKS TRUE
#endif
/*===========================================================================*/
/* MAC driver related settings. */
/*===========================================================================*/

8
testhal/STM32/I2C/i2c_pns.c
View File

@ -32,7 +32,6 @@ static const I2CConfig i2cfg2 = {
void I2CInit_pns(void){
i2cInit();
i2cStart(&I2CD1, &i2cfg1);
@ -46,13 +45,12 @@ void I2CInit_pns(void){
palSetPadMode(IOPORT2, 10, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
palSetPadMode(IOPORT2, 11, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
/* startups. Pauses added just to be safe */
chThdSleepMilliseconds(1000);
init_max1236();
chThdSleepMilliseconds(100);
chThdSleepMilliseconds(1000);
init_lis3();
chThdSleepMilliseconds(100);
chThdSleepMilliseconds(1000);
}

91
testhal/STM32/I2C/lis3.c
View File

@ -14,10 +14,17 @@
#include "lis3.h"
#define lis3_addr 0b0011101
/* buffers */
static i2cblock_t accel_rx_data[ACCEL_RX_DEPTH];
static i2cblock_t accel_tx_data[ACCEL_TX_DEPTH];
static int16_t acceleration_x = 0;
static int16_t acceleration_y = 0;
static int16_t acceleration_z = 0;
/* Error trap */
static void i2c_lis3_error_cb(I2CDriver *i2cp, const I2CSlaveConfig *i2cscfg){
(void)i2cscfg;
@ -26,50 +33,10 @@ static void i2c_lis3_error_cb(I2CDriver *i2cp, const I2CSlaveConfig *i2cscfg){
while(TRUE);
}
/**
* This treading need for convenient realize
* "read through write" process.
*/
static WORKING_AREA(I2CAccelThreadWA, 128);
static Thread *i2c_accel_tp = NULL;
static msg_t I2CAccelThread(void *arg) {
(void)arg;
int16_t acceleration_x = 0;
int16_t acceleration_y = 0;
int16_t acceleration_z = 0;
I2CSlaveConfig *i2cscfg;
msg_t msg;
while (TRUE) {
/* Waiting for wake up */
chSysLock();
i2c_accel_tp = chThdSelf();
chSchGoSleepS(THD_STATE_SUSPENDED);
msg = chThdSelf()->p_msg; /* Retrieving the message, optional.*/
chSysUnlock();
/***************** Perform processing here. ***************************/
i2cscfg = (I2CSlaveConfig *)msg;
/* collect measured data */
acceleration_x = accel_rx_data[0] + (accel_rx_data[1] << 8);
acceleration_y = accel_rx_data[2] + (accel_rx_data[3] << 8);
acceleration_z = accel_rx_data[4] + (accel_rx_data[5] << 8);
}
return 0;
}
/* This callback raise up when transfer finished */
static void i2c_lis3_cb(I2CDriver *i2cp, const I2CSlaveConfig *i2cscfg){
(void) i2cp;
/* only wake up processing thread */
if (i2c_accel_tp != NULL) {
i2c_accel_tp->p_msg = (msg_t)i2cscfg;
chSchReadyI(i2c_accel_tp);
i2c_accel_tp = NULL;
}
(void)i2cp;
(void)i2cscfg;
}
@ -80,29 +47,10 @@ static const I2CSlaveConfig lis3 = {
};
#define lis3_addr 0b0011101
/**
* Init function. Here we will also start personal serving thread.
*/
int init_lis3(void){
/* Starting the accelerometer serving thread.*/
i2c_accel_tp = chThdCreateStatic(I2CAccelThreadWA,
sizeof(I2CAccelThreadWA),
HIGHPRIO,
I2CAccelThread,
NULL);
/* wait thread statup */
while (i2c_accel_tp == NULL)
chThdSleepMilliseconds(1);
#define TXBYTES 4
#define RXBYTES 0 /* set to 0 because we need only transmit */
/* configure accelerometer */
accel_tx_data[0] = ACCEL_CTRL_REG1 | AUTO_INCREMENT_BIT; /* register address */
accel_tx_data[1] = 0b11100111;
@ -110,12 +58,7 @@ int init_lis3(void){
accel_tx_data[3] = 0b00000000;
/* sending */
i2cMasterTransmit(&I2CD1, &lis3, lis3_addr, accel_tx_data, TXBYTES, accel_rx_data, RXBYTES);
chThdSleepMilliseconds(1);
#undef RXBYTES
#undef TXBYTES
i2cMasterTransmit(&I2CD1, &lis3, lis3_addr, accel_tx_data, 4, accel_rx_data, 0);
return 0;
}
@ -123,13 +66,13 @@ int init_lis3(void){
*
*/
void request_acceleration_data(void){
#define RXBYTES 6
#define TXBYTES 1
accel_tx_data[0] = ACCEL_OUT_DATA | AUTO_INCREMENT_BIT; // register address
i2cAcquireBus(&I2CD1);
i2cMasterTransmit(&I2CD1, &lis3, lis3_addr, accel_tx_data, TXBYTES, accel_rx_data, RXBYTES);
i2cReleaseBus(&I2CD1);
#undef RXBYTES
#undef TXBYTES
//i2cAcquireBus(&I2CD1);
i2cMasterTransmit(&I2CD1, &lis3, lis3_addr, accel_tx_data, 1, accel_rx_data, 6);
//i2cReleaseBus(&I2CD1);
acceleration_x = accel_rx_data[0] + (accel_rx_data[1] << 8);
acceleration_y = accel_rx_data[2] + (accel_rx_data[3] << 8);
acceleration_z = accel_rx_data[4] + (accel_rx_data[5] << 8);
}

4
testhal/STM32/I2C/main.c
View File

@ -68,7 +68,7 @@ static msg_t PollMax1236Thread(void *arg) {
systime_t time = chTimeNow();
while (TRUE) {
time += MS2ST(20);
time += MS2ST(200);
/* Call reading function */
read_max1236();
chThdSleepUntil(time);
@ -83,7 +83,7 @@ static msg_t PollAccelThread(void *arg) {
systime_t time = chTimeNow();
while (TRUE) {
time += MS2ST(2);
time += MS2ST(20);
request_acceleration_data();
chThdSleepUntil(time);
}

31
testhal/STM32/I2C/max1236.c
View File

@ -10,6 +10,10 @@
#include "max1236.h"
#define max1236_addr 0b0110100
/* Data buffers */
static i2cblock_t max1236_rx_data[MAX1236_RX_DEPTH];
static i2cblock_t max1236_tx_data[MAX1236_TX_DEPTH];
@ -31,10 +35,6 @@ static void i2c_max1236_cb(I2CDriver *i2cp, const I2CSlaveConfig *i2cscfg){
(void)*i2cp;
(void)*i2cscfg;
/* get ADC data */
ch1 = ((max1236_rx_data[0] & 0xF) << 8) + max1236_rx_data[1];
ch2 = ((max1236_rx_data[2] & 0xF) << 8) + max1236_rx_data[3];
ch3 = ((max1236_rx_data[4] & 0xF) << 8) + max1236_rx_data[5];
ch4 = ((max1236_rx_data[6] & 0xF) << 8) + max1236_rx_data[7];
}
@ -45,7 +45,6 @@ static const I2CSlaveConfig max1236 = {
i2c_max1236_error_cb,
};
#define max1236_addr 0b0110100
/**
* Initilization routine. See datasheet on page 13 to understand
@ -53,32 +52,24 @@ static const I2CSlaveConfig max1236 = {
*/
void init_max1236(void){
/* this data we must send via IC to setup ADC */
#define RXBYTES 0
#define TXBYTES 2
max1236_tx_data[0] = 0b10000011; /* config register content. Consult datasheet */
max1236_tx_data[1] = 0b00000111; /* config register content. Consult datasheet */
/* transmit out 2 bytes */
i2cAcquireBus(&I2CD2);
i2cMasterTransmit(&I2CD2, &max1236, max1236_addr, max1236_tx_data, TXBYTES, max1236_rx_data, RXBYTES);
while(I2CD2.id_state != I2C_READY){
chThdSleepMilliseconds(1);
}
i2cMasterTransmit(&I2CD2, &max1236, max1236_addr, max1236_tx_data, 2, max1236_rx_data, 0);
i2cReleaseBus(&I2CD2);
#undef RXBYTES
#undef TXBYTES
}
/* Now simply read 8 bytes to get all 4 ADC channels */
void read_max1236(void){
#define TXBYTES 0
#define RXBYTES 8
i2cAcquireBus(&I2CD2);
i2cMasterReceive(&I2CD2, &max1236, max1236_addr, max1236_rx_data, RXBYTES);
i2cMasterReceive(&I2CD2, &max1236, max1236_addr, max1236_rx_data, 8);
i2cReleaseBus(&I2CD2);
#undef RXBYTES
#undef TXBYTES
ch1 = ((max1236_rx_data[0] & 0xF) << 8) + max1236_rx_data[1];
ch2 = ((max1236_rx_data[2] & 0xF) << 8) + max1236_rx_data[3];
ch3 = ((max1236_rx_data[4] & 0xF) << 8) + max1236_rx_data[5];
ch4 = ((max1236_rx_data[6] & 0xF) << 8) + max1236_rx_data[7];
}

4
testhal/STM32/I2C/mcuconf.h
View File

@ -159,10 +159,10 @@
#define STM32_I2C_I2C2_DMA_ERROR_HOOK() chSysHalt()
/* I2C1 */
#define STM32_I2C_I2C1_USE_GPT_TIM GPTD1
#define STM32_I2C_I2C1_USE_POLLING_WAIT FALSE
#define STM32_I2C_I2C1_USE_POLLING_WAIT TRUE
/* I2C2 */
#define STM32_I2C_I2C2_USE_GPT_TIM GPTD2
#define STM32_I2C_I2C2_USE_POLLING_WAIT FALSE
#define STM32_I2C_I2C2_USE_POLLING_WAIT TRUE
/*

8
testhal/STM32/I2C/tmp75.c
View File

@ -14,6 +14,7 @@
/* input buffer */
static i2cblock_t tmp75_rx_data[TMP75_RX_DEPTH];
/* temperature value */
static int16_t temperature = 0;
@ -30,7 +31,6 @@ static void i2c_tmp75_cb(I2CDriver *i2cp, const I2CSlaveConfig *i2cscfg){
(void)*i2cp;
(void)*i2cscfg;
/* store temperature value */
temperature = (tmp75_rx_data[0] << 8) + tmp75_rx_data[1];
}
/* Fill TMP75 config. */
@ -43,12 +43,10 @@ static const I2CSlaveConfig tmp75 = {
/* This is main function. */
void request_temperature(void){
#define TXBYTES 0 /* set to zero because we need only reading */
#define RXBYTES 2 /* we need to read 2 bytes */
i2cAcquireBus(&I2CD2);
i2cMasterReceive(&I2CD2, &tmp75, tmp75_addr, tmp75_rx_data, RXBYTES);
i2cMasterReceive(&I2CD2, &tmp75, tmp75_addr, tmp75_rx_data, 2);
i2cReleaseBus(&I2CD2);
temperature = (tmp75_rx_data[0] << 8) + tmp75_rx_data[1];
}