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pwmout - M261 - add read methods for period and pulsewidth

pull/13492/head
talorion 2020-08-25 23:43:47 +02:00 committed by Gregor Mayramhof
parent 1c75956312
commit 1a9d8576d7
1 changed files with 24 additions and 15 deletions
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39
targets/TARGET_NUVOTON/TARGET_M261/pwmout_api.c
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@ -1,4 +1,4 @@
/* /*
* Copyright (c) 2019-2020 Nuvoton Technology Corporation * Copyright (c) 2019-2020 Nuvoton Technology Corporation
* SPDX-License-Identifier: Apache-2.0 * SPDX-License-Identifier: Apache-2.0
* *
@ -58,9 +58,9 @@ static const struct nu_modinit_s pwm_modinit_tab[] = {
{NC, 0, 0, 0, 0, (IRQn_Type) 0, NULL} {NC, 0, 0, 0, 0, (IRQn_Type) 0, NULL}
}; };
static void pwmout_config(pwmout_t* obj, int start); static void pwmout_config(pwmout_t *obj, int start);
void pwmout_init(pwmout_t* obj, PinName pin) void pwmout_init(pwmout_t *obj, PinName pin)
{ {
obj->pwm = (PWMName) pinmap_peripheral(pin, PinMap_PWM); obj->pwm = (PWMName) pinmap_peripheral(pin, PinMap_PWM);
MBED_ASSERT((int) obj->pwm != NC); MBED_ASSERT((int) obj->pwm != NC);
@ -85,7 +85,7 @@ void pwmout_init(pwmout_t* obj, PinName pin)
} }
// NOTE: All channels (identified by PWMName) share a PWM module. This reset will also affect other channels of the same PWM module. // NOTE: All channels (identified by PWMName) share a PWM module. This reset will also affect other channels of the same PWM module.
if (! ((struct nu_pwm_var *) modinit->var)->en_msk) { if (!((struct nu_pwm_var *) modinit->var)->en_msk) {
// Reset this module if no channel enabled // Reset this module if no channel enabled
SYS_ResetModule(modinit->rsetidx); SYS_ResetModule(modinit->rsetidx);
} }
@ -102,7 +102,7 @@ void pwmout_init(pwmout_t* obj, PinName pin)
pwm_modinit_mask |= 1 << i; pwm_modinit_mask |= 1 << i;
} }
void pwmout_free(pwmout_t* obj) void pwmout_free(pwmout_t *obj)
{ {
EPWM_T *pwm_base = (EPWM_T *) NU_MODBASE(obj->pwm); EPWM_T *pwm_base = (EPWM_T *) NU_MODBASE(obj->pwm);
uint32_t chn = NU_MODSUBINDEX(obj->pwm); uint32_t chn = NU_MODSUBINDEX(obj->pwm);
@ -127,29 +127,29 @@ void pwmout_free(pwmout_t* obj)
obj->pin = NC; obj->pin = NC;
} }
void pwmout_write(pwmout_t* obj, float value) void pwmout_write(pwmout_t *obj, float value)
{ {
obj->pulsewidth_us = NU_CLAMP((uint32_t) (value * obj->period_us), 0, obj->period_us); obj->pulsewidth_us = NU_CLAMP((uint32_t)(value * obj->period_us), 0, obj->period_us);
pwmout_config(obj, 1); pwmout_config(obj, 1);
} }
float pwmout_read(pwmout_t* obj) float pwmout_read(pwmout_t *obj)
{ {
return NU_CLAMP((((float) obj->pulsewidth_us) / obj->period_us), 0.0f, 1.0f); return NU_CLAMP((((float) obj->pulsewidth_us) / obj->period_us), 0.0f, 1.0f);
} }
void pwmout_period(pwmout_t* obj, float seconds) void pwmout_period(pwmout_t *obj, float seconds)
{ {
pwmout_period_us(obj, seconds * 1000000.0f); 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); pwmout_period_us(obj, ms * 1000);
} }
// Set the PWM period, keeping the duty cycle the same. // 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)
{ {
uint32_t period_us_old = obj->period_us; uint32_t period_us_old = obj->period_us;
uint32_t pulsewidth_us_old = obj->pulsewidth_us; uint32_t pulsewidth_us_old = obj->pulsewidth_us;
@ -158,23 +158,32 @@ void pwmout_period_us(pwmout_t* obj, int us)
pwmout_config(obj, 1); pwmout_config(obj, 1);
} }
void pwmout_pulsewidth(pwmout_t* obj, float seconds) int pwmout_read_period_us(pwmout_t *obj)
{
return obj->period_us;
}
void pwmout_pulsewidth(pwmout_t *obj, float seconds)
{ {
pwmout_pulsewidth_us(obj, seconds * 1000000.0f); 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); pwmout_pulsewidth_us(obj, ms * 1000);
} }
void pwmout_pulsewidth_us(pwmout_t* obj, int us) void pwmout_pulsewidth_us(pwmout_t *obj, int us)
{ {
obj->pulsewidth_us = NU_CLAMP(us, 0, obj->period_us); obj->pulsewidth_us = NU_CLAMP(us, 0, obj->period_us);
pwmout_config(obj, 1); pwmout_config(obj, 1);
} }
static void pwmout_config(pwmout_t* obj, int start) int pwmout_read_pulsewidth_us(pwmout_t *obj {
return obj->pulsewidth_us;
}
static void pwmout_config(pwmout_t *obj, int start)
{ {
EPWM_T *pwm_base = (EPWM_T *) NU_MODBASE(obj->pwm); EPWM_T *pwm_base = (EPWM_T *) NU_MODBASE(obj->pwm);
uint32_t chn = NU_MODSUBINDEX(obj->pwm); uint32_t chn = NU_MODSUBINDEX(obj->pwm);