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cpu/samd21: pwm: allow to use channels > 3

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Channels 4…7 are on the CCB register.
This commit is contained in:
Benjamin Valentin 2020-04-02 23:48:42 +02:00 committed by Benjamin Valentin
parent 4eb9b9b9df
commit 01c573c612
1 changed files with 10 additions and 2 deletions
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12
cpu/samd21/periph/pwm.c
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@ -167,8 +167,16 @@ void pwm_set(pwm_t dev, uint8_t channel, uint16_t value)
(pwm_config[dev].chan[channel].pin == GPIO_UNDEF)) {
return;
}
_tcc(dev)->CC[_chan(dev, channel)].reg = value;
while (_tcc(dev)->SYNCBUSY.reg & (TCC_SYNCBUSY_CC0 << _chan(dev, channel))) {}
uint8_t chan = _chan(dev, channel);
if (chan < 4) {
_tcc(dev)->CC[chan].reg = value;
while (_tcc(dev)->SYNCBUSY.reg & (TCC_SYNCBUSY_CC0 << chan)) {}
} else {
chan -= 4;
_tcc(dev)->CCB[chan].reg = value;
while (_tcc(dev)->SYNCBUSY.reg & (TCC_SYNCBUSY_CCB0 << chan)) {}
}
}
void pwm_poweron(pwm_t dev)