riot-ci/RIOT
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

cpu/samd21: don't hard-code number of channels

Browse Source 
Each TCC can have 8 PWM channels, so don't hard-code
3 channels/TCC.
This commit is contained in:
Benjamin Valentin 2020-04-26 22:26:01 +02:00
parent 70a558059e
commit da89f6ac5f
2 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
cpu/samd21/include/periph_cpu.h
View File

@ -84,7 +84,8 @@ typedef struct {
*/
typedef struct {
Tcc *dev; /**< TCC device to use */
pwm_conf_chan_t chan[3]; /**< channel configuration */
const pwm_conf_chan_t *chan;/**< channel configuration */
const uint8_t chan_numof; /**< number of channels */
} pwm_conf_t;
/**

6
cpu/samd21/periph/pwm.c
View File

@ -151,7 +151,7 @@ uint32_t pwm_init(pwm_t dev, pwm_mode_t mode, uint32_t freq, uint16_t res)
f_real = (CLOCK_CORECLOCK / (scale * res));
/* configure the used pins */
for (unsigned i = 0; i < PWM_MAX_CHANNELS; i++) {
for (unsigned i = 0; i < pwm_config[dev].chan_numof; i++) {
if (pwm_config[dev].chan[i].pin != GPIO_UNDEF) {
gpio_init(pwm_config[dev].chan[i].pin, GPIO_OUT);
gpio_init_mux(pwm_config[dev].chan[i].pin, pwm_config[dev].chan[i].mux);
@ -195,12 +195,12 @@ uint32_t pwm_init(pwm_t dev, pwm_mode_t mode, uint32_t freq, uint16_t res)
uint8_t pwm_channels(pwm_t dev)
{
return ARRAY_SIZE(pwm_config[dev].chan);
return pwm_config[dev].chan_numof;
}
void pwm_set(pwm_t dev, uint8_t channel, uint16_t value)
{
if ((channel >= PWM_MAX_CHANNELS) ||
if ((channel >= pwm_config[dev].chan_numof) ||
(pwm_config[dev].chan[channel].pin == GPIO_UNDEF)) {
return;
}