esp32-hal-dac.c

/*
 * SPDX-FileCopyrightText: 2019-2023 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include"esp32-hal-dac.h"

#ifSOC_DAC_SUPPORTED
#include"esp32-hal.h"
#include"esp32-hal-periman.h"
#include"soc/dac_channel.h"
#include"driver/dac_oneshot.h"

staticbooldacDetachBus(void*bus) {
esp_err_terr=dac_oneshot_del_channel((dac_oneshot_handle_t)bus);
if (err!=ESP_OK) {
log_e("dac_oneshot_del_channel failed with error: %d", err);
return false;
 }
return true;
}

bool__dacWrite(uint8_tpin, uint8_tvalue) {
esp_err_terr=ESP_OK;
if (pin!=DAC_CHAN0_GPIO_NUM&&pin!=DAC_CHAN1_GPIO_NUM) {
log_e("pin %u is not a DAC pin", pin);
return false; //not dac pin
 }

dac_oneshot_handle_tbus= (dac_oneshot_handle_t)perimanGetPinBus(pin, ESP32_BUS_TYPE_DAC_ONESHOT);
if (bus==NULL) {
perimanSetBusDeinit(ESP32_BUS_TYPE_DAC_ONESHOT, dacDetachBus);
if (!perimanClearPinBus(pin)) {
return false;
 }
dac_channel_tchannel= (pin==DAC_CHAN0_GPIO_NUM) ? DAC_CHAN_0 : DAC_CHAN_1;
dac_oneshot_config_tconfig= {.chan_id=channel};
err=dac_oneshot_new_channel(&config, &bus);
if (err!=ESP_OK) {
log_e("dac_oneshot_new_channel failed with error: %d", err);
return false;
 }
if (!perimanSetPinBus(pin, ESP32_BUS_TYPE_DAC_ONESHOT, (void*)bus, -1, channel)) {
dacDetachBus((void*)bus);
return false;
 }
 }

err=dac_oneshot_output_voltage(bus, value);
if (err!=ESP_OK) {
log_e("dac_oneshot_output_voltage failed with error: %d", err);
return false;
 }
return true;
}

bool__dacDisable(uint8_tpin) {
if (pin!=DAC_CHAN0_GPIO_NUM&&pin!=DAC_CHAN1_GPIO_NUM) {
log_e("pin %u is not a DAC pin", pin);
return false; //not dac pin
 }
void*bus=perimanGetPinBus(pin, ESP32_BUS_TYPE_DAC_ONESHOT);
if (bus!=NULL) {
// will call dacDetachBus
returnperimanClearPinBus(pin);
 } else {
log_e("pin %u is not attached to DAC", pin);
 }
return false;
}

externbooldacWrite(uint8_tpin, uint8_tvalue) __attribute__((weak, alias("__dacWrite")));
externbooldacDisable(uint8_tpin) __attribute__((weak, alias("__dacDisable")));

#endif