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PWM Output on RP2040 for high frequencies (#5204)

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Maciej Sokołowski 2023-08-07 01:41:44 +02:00 committed by GitHub
parent dfffa67c0f
commit 0ae3fcb0b7
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esphome/components/rp2040_pwm/rp2040_pwm.cpp
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@ -27,8 +27,12 @@ void RP2040PWM::setup_pwm_() {
uint32_t clock = clock_get_hz(clk_sys); uint32_t clock = clock_get_hz(clk_sys);
float divider = ceil(clock / (4096 * this->frequency_)) / 16.0f; float divider = ceil(clock / (4096 * this->frequency_)) / 16.0f;
if (divider < 1.0f) {
divider = 1.0f;
}
uint16_t wrap = clock / divider / this->frequency_ - 1; uint16_t wrap = clock / divider / this->frequency_ - 1;
this->wrap_ = wrap; this->wrap_ = wrap;
ESP_LOGD(TAG, "divider=%.5f, wrap=%d, clock=%d", divider, wrap, clock);
pwm_config_set_clkdiv(&config, divider); pwm_config_set_clkdiv(&config, divider);
pwm_config_set_wrap(&config, wrap); pwm_config_set_wrap(&config, wrap);