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[stm32] add support for TIM3,4,5,8 for ppm input

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Thanks to Chris!
This finally closes #557
This commit is contained in:
Felix Ruess
2013-11-01 19:04:53 +01:00
parent 8807918668
commit 93e3839b5f
1 changed files with 136 additions and 0 deletions
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sw/airborne/arch/stm32/subsystems/radio_control/ppm_arch.c
+136
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@@ -82,6 +82,54 @@ PRINT_CONFIG_MSG("Using TIM2 for PPM input.")
#define PPM_TIMER_CLK (rcc_ppre1_frequency * 2)
#endif
#elif USE_PPM_TIM3
PRINT_CONFIG_MSG("Using TIM3 for PPM input.")
#define PPM_RCC &RCC_APB1ENR
#define PPM_PERIPHERAL RCC_APB1ENR_TIM3EN
#define PPM_TIMER TIM3
#ifdef STM32F4
/* Since APB prescaler != 1 :
* Timer clock frequency (before prescaling) is twice the frequency
* of the APB domain to which the timer is connected.
*/
#define PPM_TIMER_CLK (rcc_ppre1_frequency * 2)
#endif
#elif USE_PPM_TIM4
PRINT_CONFIG_MSG("Using TIM4 for PPM input.")
#define PPM_RCC &RCC_APB1ENR
#define PPM_PERIPHERAL RCC_APB1ENR_TIM4EN
#define PPM_TIMER TIM4
#ifdef STM32F4
/* Since APB prescaler != 1 :
* Timer clock frequency (before prescaling) is twice the frequency
* of the APB domain to which the timer is connected.
*/
#define PPM_TIMER_CLK (rcc_ppre1_frequency * 2)
#endif
#elif USE_PPM_TIM5
PRINT_CONFIG_MSG("Using TIM5 for PPM input.")
#define PPM_RCC &RCC_APB1ENR
#define PPM_PERIPHERAL RCC_APB1ENR_TIM5EN
#define PPM_TIMER TIM5
#ifdef STM32F4
/* Since APB prescaler != 1 :
* Timer clock frequency (before prescaling) is twice the frequency
* of the APB domain to which the timer is connected.
*/
#define PPM_TIMER_CLK (rcc_ppre1_frequency * 2)
#endif
#elif USE_PPM_TIM1
PRINT_CONFIG_MSG("Using TIM1 for PPM input.")
@@ -94,6 +142,19 @@ PRINT_CONFIG_MSG("Using TIM1 for PPM input.")
#define PPM_TIMER_CLK (rcc_ppre2_frequency * 2)
#endif
#elif USE_PPM_TIM8
PRINT_CONFIG_MSG("Using TIM8 for PPM input.")
#define PPM_RCC &RCC_APB2ENR
#define PPM_PERIPHERAL RCC_APB2ENR_TIM8EN
#define PPM_TIMER TIM8
#ifdef STM32F4
#define PPM_TIMER_CLK (rcc_ppre2_frequency * 2)
#endif
#else
#error Unknown PPM input timer configuration.
#endif
@@ -171,6 +232,59 @@ void tim2_isr(void) {
}
#elif USE_PPM_TIM3
void tim3_isr(void) {
if((TIM3_SR & PPM_CC_IF) != 0) {
timer_clear_flag(TIM3, PPM_CC_IF);
uint32_t now = timer_get_counter(TIM3) + timer_rollover_cnt;
DecodePpmFrame(now);
}
else if((TIM3_SR & TIM_SR_UIF) != 0) {
timer_rollover_cnt+=(1<<16);
timer_clear_flag(TIM3, TIM_SR_UIF);
}
}
#elif USE_PPM_TIM4
void tim4_isr(void) {
if((TIM4_SR & PPM_CC_IF) != 0) {
timer_clear_flag(TIM4, PPM_CC_IF);
uint32_t now = timer_get_counter(TIM4) + timer_rollover_cnt;
DecodePpmFrame(now);
}
else if((TIM4_SR & TIM_SR_UIF) != 0) {
timer_rollover_cnt+=(1<<16);
timer_clear_flag(TIM4, TIM_SR_UIF);
}
}
#elif USE_PPM_TIM5
void tim5_isr(void) {
if((TIM5_SR & PPM_CC_IF) != 0) {
timer_clear_flag(TIM5, PPM_CC_IF);
uint32_t now = timer_get_counter(TIM5) + timer_rollover_cnt;
DecodePpmFrame(now);
}
else if((TIM5_SR & TIM_SR_UIF) != 0) {
timer_rollover_cnt+=(1<<16);
timer_clear_flag(TIM5, TIM_SR_UIF);
}
}
#elif USE_PPM_TIM1
#if defined(STM32F1)
@@ -193,5 +307,27 @@ void tim1_cc_isr(void) {
}
}
#elif USE_PPM_TIM8 && defined(STM32F4)
#if defined(STM32F1)
void tim8_up_isr(void) {
#elif defined(STM32F4)
void tim8_up_tim13_isr(void) {
#endif
if((TIM8_SR & TIM_SR_UIF) != 0) {
timer_rollover_cnt+=(1<<16);
timer_clear_flag(TIM8, TIM_SR_UIF);
}
}
void tim8_cc_isr(void) {
if((TIM8_SR & PPM_CC_IF) != 0) {
timer_clear_flag(TIM8, PPM_CC_IF);
uint32_t now = timer_get_counter(TIM8) + timer_rollover_cnt;
DecodePpmFrame(now);
}
}
#endif /* USE_PPM_TIM1 */