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[K64F] Ensure immediate update of CnV register in FTM 

Also changed pin assignment for the PWM test.
pull/299/head
Bogdan Marinescu 2014-04-07 16:48:56 +01:00
parent 286a4e42f6
commit 2e32c71b50
2 changed files with 8 additions and 4 deletions
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10
libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_K64F/pwmout_api.c
View File

@ -116,15 +116,19 @@ void pwmout_free(pwmout_t* obj) {
}
void pwmout_write(pwmout_t* obj, float value) {
uint32_t instance = obj->pwm_name >> TPM_SHIFT;
if (value < 0.0f) {
value = 0.0f;
} else if (value > 1.0f) {
value = 1.0f;
}
uint16_t mod = ftm_hal_get_mod(obj->pwm_name >> TPM_SHIFT);
uint16_t mod = ftm_hal_get_mod(instance);
uint32_t new_count = (uint32_t)((float)(mod) * value);
ftm_hal_set_channel_count_value(obj->pwm_name >> TPM_SHIFT, obj->pwm_name & 0xF, new_count);
ftm_hal_set_counter(obj->pwm_name >> TPM_SHIFT, 0);
// Stop FTM clock to ensure instant update of MOD register
ftm_hal_set_clock_source(instance, kClock_source_FTM_None);
ftm_hal_set_channel_count_value(instance, obj->pwm_name & 0xF, new_count);
ftm_hal_set_counter(instance, 0);
ftm_hal_set_clock_source(instance, kClock_source_FTM_SystemClk);
}
float pwmout_read(pwmout_t* obj) {

2
libraries/tests/mbed/pwm/main.cpp
View File

@ -18,7 +18,7 @@ float value = 0.75;
int main() {
#if defined(TARGET_FF_ARDUINO)
PwmOut pwm(D5);
PwmOut pwm(D9);
pwm.period_ms(10);
pwm.write(value);