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pwmout - KL27Z - add read methods for period and pulsewidth

pull/13492/head
talorion 2020-08-25 23:40:07 +02:00 committed by Gregor Mayramhof
parent 32bcd62e76
commit ac648170a4
1 changed files with 30 additions and 11 deletions
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41
targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KL27Z/pwmout_api.c
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@ -27,7 +27,7 @@ static float pwm_clock_mhz;
/* Array of TPM peripheral base address. */
static TPM_Type *const tpm_addrs[] = TPM_BASE_PTRS;
void pwmout_init(pwmout_t* obj, PinName pin)
void pwmout_init(pwmout_t *obj, PinName pin)
{
PWMName pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT(pwm != (PWMName)NC);
@ -72,12 +72,12 @@ void pwmout_init(pwmout_t* obj, PinName pin)
pinmap_pinout(pin, PinMap_PWM);
}
void pwmout_free(pwmout_t* obj)
void pwmout_free(pwmout_t *obj)
{
TPM_Deinit(tpm_addrs[obj->pwm_name >> TPM_SHIFT]);
}
void pwmout_write(pwmout_t* obj, float value)
void pwmout_write(pwmout_t *obj, float value)
{
if (value < 0.0f) {
value = 0.0f;
@ -93,30 +93,31 @@ void pwmout_write(pwmout_t* obj, float value)
base->CNT = 0;
}
float pwmout_read(pwmout_t* obj)
float pwmout_read(pwmout_t *obj)
{
TPM_Type *base = tpm_addrs[obj->pwm_name >> TPM_SHIFT];
uint16_t count = (base->CONTROLS[obj->pwm_name & 0xF].CnV) & TPM_CnV_VAL_MASK;
uint16_t mod = base->MOD & TPM_MOD_MOD_MASK;
if (mod == 0)
if (mod == 0) {
return 0.0;
}
float v = (float)(count) / (float)(mod);
return (v > 1.0f) ? (1.0f) : (v);
}
void pwmout_period(pwmout_t* obj, float seconds)
void pwmout_period(pwmout_t *obj, float seconds)
{
pwmout_period_us(obj, seconds * 1000000.0f);
}
void pwmout_period_ms(pwmout_t* obj, int ms)
void pwmout_period_ms(pwmout_t *obj, int ms)
{
pwmout_period_us(obj, ms * 1000);
}
// Set the PWM period, keeping the duty cycle the same.
void pwmout_period_us(pwmout_t* obj, int us)
void pwmout_period_us(pwmout_t *obj, int us)
{
TPM_Type *base = tpm_addrs[obj->pwm_name >> TPM_SHIFT];
float dc = pwmout_read(obj);
@ -126,17 +127,26 @@ void pwmout_period_us(pwmout_t* obj, int us)
pwmout_write(obj, dc);
}
void pwmout_pulsewidth(pwmout_t* obj, float seconds)
int pwmout_read_period_us(pwmout_t *obj)
{
uint32_t tmp = 0;
if (pwm_clock_mhz > 0) {
tmp = ((base->MOD) + 1) / pwm_clock_mhz;
}
return tmp;
}
void pwmout_pulsewidth(pwmout_t *obj, float seconds)
{
pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
}
void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
void pwmout_pulsewidth_ms(pwmout_t *obj, int ms)
{
pwmout_pulsewidth_us(obj, ms * 1000);
}
void pwmout_pulsewidth_us(pwmout_t* obj, int us)
void pwmout_pulsewidth_us(pwmout_t *obj, int us)
{
TPM_Type *base = tpm_addrs[obj->pwm_name >> TPM_SHIFT];
uint32_t value = (uint32_t)(pwm_clock_mhz * (float)us);
@ -145,6 +155,15 @@ void pwmout_pulsewidth_us(pwmout_t* obj, int us)
base->CONTROLS[obj->pwm_name & 0xF].CnV = value;
}
int pwmout_read_pulsewidth_us(pwmout_t *obj)
{
uint32_t tmp = 0;
if (pwm_clock_mhz > 0) {
tmp = (base->CONTROLS[obj->pwm_name & 0xF].CnV) / pwm_clock_mhz;
}
return tmp;
}
const PinMap *pwmout_pinmap()
{
return PinMap_PWM;