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cpu/samd21: allowed third PWM channel per device

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This commit is contained in:
Hauke Petersen 2016-02-19 16:33:57 +01:00
parent a75847ca27
commit bc1013b54e
2 changed files with 7 additions and 4 deletions
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2
cpu/samd21/include/periph_cpu.h
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@ -48,7 +48,7 @@ typedef struct {
*/
typedef struct {
Tcc *dev; /**< TCC device to use */
pwm_conf_chan_t chan[2]; /**< channel configuration */
pwm_conf_chan_t chan[3]; /**< channel configuration */
} pwm_conf_t;
/**

9
cpu/samd21/periph/pwm.c
View File

@ -106,8 +106,10 @@ uint32_t pwm_init(pwm_t dev, pwm_mode_t mode, uint32_t freq, uint16_t res)
/* configure the used pins */
for (int i = 0; i < PWM_MAX_CHANNELS; i++) {
gpio_init(pwm_config[dev].chan[i].pin, GPIO_DIR_OUT, GPIO_NOPULL);
gpio_init_mux(pwm_config[dev].chan[i].pin, pwm_config[dev].chan[i].mux);
if (pwm_config[dev].chan[i].pin != GPIO_UNDEF) {
gpio_init(pwm_config[dev].chan[i].pin, GPIO_DIR_OUT, GPIO_NOPULL);
gpio_init_mux(pwm_config[dev].chan[i].pin, pwm_config[dev].chan[i].mux);
}
}
/* power on the device */
@ -152,7 +154,8 @@ uint8_t pwm_channels(pwm_t dev)
void pwm_set(pwm_t dev, uint8_t channel, uint16_t value)
{
if (channel >= PWM_MAX_CHANNELS) {
if ((channel >= PWM_MAX_CHANNELS) ||
(pwm_config[dev].chan[channel].pin == GPIO_UNDEF)) {
return;
}
_tcc(dev)->CC[_chan(dev, channel)].reg = value;