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ChibiOS
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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1415 35acf78f-673a-0410-8e92-d51de3d6d3f4

This commit is contained in:
gdisirio 2009-12-11 15:55:45 +00:00
parent f2c5dc67ea
commit 59cd37eacb
2 changed files with 69 additions and 3 deletions
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37
os/hal/platforms/STM32/pwm_lld.c
View File

@ -29,6 +29,11 @@
#if CH_HAL_USE_PWM || defined(__DOXYGEN__)
/** @brief PWM1 driver identifier.*/
#if defined(USE_STM32_PWM1) || defined(__DOXYGEN__)
PWMDriver PWMD1;
#endif
/*===========================================================================*/
/* Low Level Driver exported variables. */
/*===========================================================================*/
@ -54,6 +59,15 @@
*/
void pwm_lld_init(void) {
#if USE_STM32_PWM1
/* TIM1 reset, ensures reset state in order to avoid trouble with JTAGs.*/
RCC->APB2RSTR = RCC_APB2RSTR_TIM1RST;
RCC->APB2RSTR = 0;
/* Driver initialization.*/
pwmObjectInit(&PWMD1);
#endif
}
/**
@ -65,6 +79,12 @@ void pwm_lld_start(PWMDriver *pwmp) {
if (pwmp->pd_state == PWM_STOP) {
/* Clock activation.*/
#if USE_STM32_PWM1
if (&PWMD1 == pwmp) {
NVICEnableVector(TIM1_CC_IRQn, STM32_PWM1_IRQ_PRIORITY);
RCC->APB2ENR |= RCC_APB2ENR_TIM1EN;
}
#endif
}
/* Configuration.*/
}
@ -76,6 +96,15 @@ void pwm_lld_start(PWMDriver *pwmp) {
*/
void pwm_lld_stop(PWMDriver *pwmp) {
/* If in ready state then disables the PWM clock.*/
if (pwmp->pd_state == PWM_READY) {
#if USE_STM32_PWM1
if (&PWMD1 == pwmp) {
NVICDisableVector(TIM1_CC_IRQn);
RCC->APB2ENR &= ~RCC_APB2ENR_TIM1EN;
}
#endif
}
}
/**
@ -105,6 +134,14 @@ bool_t pwm_lld_is_enabled(PWMDriver *pwmp, pwmchannel_t channel) {
void pwm_lld_set_callback(PWMDriver *pwmp, pwmchannel_t channel,
pwmedge_t edge, pwmcallback_t callback) {
if (edge == PWM_NONE) {
/* Callback disable.*/
pwmp->pd_callbacks[channel] = NULL;
}
else {
/* Callback enable.*/
pwmp->pd_callbacks[channel] = callback;
}
}
/**

35
os/hal/platforms/STM32/pwm_lld.h
View File

@ -33,15 +33,30 @@
/* Driver constants. */
/*===========================================================================*/
/**
* @brief Number of PWM channels per PWM driver.
*/
#define PWM_CHANNELS 4
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief Number of PWM channels per PWM driver.
* @brief PWM1 driver enable switch.
* @details If set to @p TRUE the support for PWM1 is included.
* @note The default is @p TRUE.
*/
#if !defined(PWM_CHANNELS) || defined(__DOXYGEN__)
#define PWM_CHANNELS 1
#if !defined(USE_STM32_PWM1) || defined(__DOXYGEN__)
#define USE_STM32_PWM1 TRUE
#endif
/**
* @brief PWM1 interrupt priority level setting.
* @note @p BASEPRI_KERNEL >= @p STM32_PWM1_IRQ_PRIORITY > @p PRIORITY_PENDSV.
*/
#if !defined(STM32_PWM1_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define STM32_PWM1_IRQ_PRIORITY 0x80
#endif
/*===========================================================================*/
@ -79,12 +94,25 @@ typedef struct {
*/
const PWMConfig *pd_config;
/* End of the mandatory fields.*/
/**
* @brief Bit mask of the enabled channels.
*/
uint32_t pd_enabled_channels;
/**
* @brief Callback pointers.
*/
pwmcallback_t pd_callbacks[PWM_CHANNELS];
} PWMDriver;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
/** @cond never*/
#if defined(USE_STM32_PWM1)
extern PWMDriver PWMD1;
#endif
#ifdef __cplusplus
extern "C" {
#endif
@ -101,6 +129,7 @@ extern "C" {
#ifdef __cplusplus
}
#endif
/** @endcond*/
#endif /* CH_HAL_USE_PWM */