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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2905 35acf78f-673a-0410-8e92-d51de3d6d3f4

master
gdisirio 2011-04-30 07:52:35 +00:00
parent 699789a722
commit 2e7866f634
3 changed files with 80 additions and 0 deletions
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66
os/hal/platforms/STM32/sdc_lld.c
View File

@ -119,6 +119,72 @@ void sdc_lld_stop(SDCDriver *sdcp) {
}
}
/**
* @brief Starts the SDIO clock and sets it to init mode (400KHz or less).
*
* @param[in] sdcp pointer to the @p SDCDriver object
*
* @notapi
*/
void sdc_lld_start_clk(SDCDriver *sdcp) {
(void)sdcp;
/* Initial clock setting: 400KHz, 1bit mode.*/
SDIO->CLKCR = STM32_SDIO_DIV_LS;
SDIO->POWER |= SDIO_POWER_PWRCTRL_0 | SDIO_POWER_PWRCTRL_1;
SDIO->CLKCR |= SDIO_CLKCR_CLKEN;
}
/**
* @brief Sets the SDIO clock to data mode (25MHz or less).
*
* @param[in] sdcp pointer to the @p SDCDriver object
*
* @notapi
*/
void sdc_lld_set_data_clk(SDCDriver *sdcp) {
(void)sdcp;
SDIO->CLKCR = (SDIO->CLKCR & 0xFFFFFF00) | STM32_SDIO_DIV_HS;
}
/**
* @brief Stops the SDIO clock.
*
* @param[in] sdcp pointer to the @p SDCDriver object
*
* @notapi
*/
void sdc_lld_stop_clk(SDCDriver *sdcp) {
(void)sdcp;
SDIO->CLKCR = 0;
SDIO->POWER = 0;
}
/**
* @brief Switches the bus to 4 bits mode.
*
* @param[in] sdcp pointer to the @p SDCDriver object
*
* @notapi
*/
void sdc_lld_set_bus_mode(SDCDriver *sdcp, sdcbusmode_t mode) {
uint32_t clk = SDIO->CLKCR & ~SDIO_CLKCR_WIDBUS;
(void)sdcp;
switch (mode) {
case SDC_MODE_1BIT:
SDIO->CLKCR = clk;
break;
case SDC_MODE_4BIT:
SDIO->CLKCR = clk | SDIO_CLKCR_WIDBUS_0;
break;
case SDC_MODE_8BIT:
SDIO->CLKCR = clk | SDIO_CLKCR_WIDBUS_1;
}
}
/**
* @brief Sends an SDIO command with no response expected.
*

12
os/hal/platforms/STM32/sdc_lld.h
View File

@ -89,6 +89,14 @@
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Type of SDIO bus mode.
*/
typedef enum {
SDC_MODE_1BIT = 0,
SDC_MODE_4BIT,
SDC_MODE_8BIT
} sdcbusmode_t;
/**
* @brief Type of a structure representing an SDC driver.
@ -136,6 +144,10 @@ extern "C" {
void sdc_lld_init(void);
void sdc_lld_start(SDCDriver *sdcp);
void sdc_lld_stop(SDCDriver *sdcp);
void sdc_lld_set_init_clk(SDCDriver *sdcp);
void sdc_lld_set_data_clk(SDCDriver *sdcp);
void sdc_lld_stop_clk(SDCDriver *sdcp);
void sdc_lld_set_bus_mode(SDCDriver *sdcp, sdcbusmode_t mode);
void sdc_lld_send_cmd_none(SDCDriver *sdcp, uint8_t cmd, uint32_t arg);
bool_t sdc_lld_send_cmd_short(SDCDriver *sdcp, uint8_t cmd, uint32_t arg,
uint32_t *resp);

2
os/hal/src/sdc.c
View File

@ -135,6 +135,8 @@ bool_t sdcConnect(SDCDriver *sdcp) {
sdcp->state = SDC_INITNG;
chSysUnlock();
sdc_lld_start_clk(sdcp);
sdcp->state = SDC_ACTIVE;
return FALSE;
}