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LEDC - AnalogWrite new API + ledcAttachPin duty fix (#7346)

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Jan Procházka 2022-11-11 12:54:02 +01:00 committed by GitHub
parent bcc1d758fc
commit 9762b2392a
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 30 additions and 3 deletions
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29
cores/esp32/esp32-hal-ledc.c
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@ -166,6 +166,7 @@ void ledcAttachPin(uint8_t pin, uint8_t chan)
return;
}
uint8_t group=(chan/8), channel=(chan%8), timer=((chan/2)%4);
uint32_t duty = ledc_get_duty(group,channel);
ledc_channel_config_t ledc_channel = {
.speed_mode = group,
@ -173,7 +174,7 @@ void ledcAttachPin(uint8_t pin, uint8_t chan)
.timer_sel = timer,
.intr_type = LEDC_INTR_DISABLE,
.gpio_num = pin,
.duty = 0,
.duty = duty,
.hpoint = 0
};
ledc_channel_config(&ledc_channel);
@ -211,6 +212,8 @@ uint32_t ledcChangeFrequency(uint8_t chan, uint32_t freq, uint8_t bit_num)
static int8_t pin_to_channel[SOC_GPIO_PIN_COUNT] = { 0 };
static int cnt_channel = LEDC_CHANNELS;
static uint8_t analog_resolution = 8;
static int analog_frequency = 1000;
void analogWrite(uint8_t pin, int value) {
// Use ledc hardware for internal pins
if (pin < SOC_GPIO_PIN_COUNT) {
@ -220,8 +223,8 @@ void analogWrite(uint8_t pin, int value) {
return;
}
pin_to_channel[pin] = cnt_channel--;
ledcSetup(cnt_channel, analog_frequency, analog_resolution);
ledcAttachPin(pin, cnt_channel);
ledcSetup(cnt_channel, 1000, 8);
}
ledcWrite(pin_to_channel[pin] - 1, value);
}
@ -230,3 +233,25 @@ void analogWrite(uint8_t pin, int value) {
int8_t analogGetChannel(uint8_t pin) {
return pin_to_channel[pin] - 1;
}
void analogWriteFrequency(uint32_t freq) {
if (cnt_channel != LEDC_CHANNELS) {
for (int channel = LEDC_CHANNELS - 1; channel >= cnt_channel; channel--) {
ledcChangeFrequency(channel, freq, analog_resolution);
}
}
analog_frequency = freq;
}
void analogWriteResolution(uint8_t bits) {
if(bits > LEDC_MAX_BIT_WIDTH) {
log_w("analogWrite resolution width too big! Setting to maximum %u bits)", LEDC_MAX_BIT_WIDTH);
bits = LEDC_MAX_BIT_WIDTH;
}
if (cnt_channel != LEDC_CHANNELS) {
for (int channel = LEDC_CHANNELS - 1; channel >= cnt_channel; channel--) {
ledcChangeFrequency(channel, analog_frequency, bits);
}
}
analog_resolution = bits;
}

2
cores/esp32/esp32-hal.h
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@ -93,6 +93,8 @@ void yield(void);
void analogWrite(uint8_t pin, int value);
int8_t analogGetChannel(uint8_t pin);
void analogWriteFrequency(uint32_t freq);
void analogWriteResolution(uint8_t bits);
//returns chip temperature in Celsius
float temperatureRead();