mirror of
https://github.com/espressif/arduino-esp32
synced 2024-09-21 10:28:04 +00:00
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/*
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* SPDX-FileCopyrightText: 2019-2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "esp32-hal-dac.h"
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#if SOC_DAC_SUPPORTED
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#include "esp32-hal.h"
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#include "esp32-hal-periman.h"
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#include "soc/dac_channel.h"
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#include "driver/dac_oneshot.h"
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static bool dacDetachBus(void *bus) {
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esp_err_t err = dac_oneshot_del_channel((dac_oneshot_handle_t)bus);
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if (err != ESP_OK) {
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log_e("dac_oneshot_del_channel failed with error: %d", err);
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return false;
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}
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return true;
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}
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bool __dacWrite(uint8_t pin, uint8_t value) {
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esp_err_t err = ESP_OK;
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if (pin != DAC_CHAN0_GPIO_NUM && pin != DAC_CHAN1_GPIO_NUM) {
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log_e("pin %u is not a DAC pin", pin);
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return false; //not dac pin
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}
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dac_oneshot_handle_t bus = (dac_oneshot_handle_t)perimanGetPinBus(pin, ESP32_BUS_TYPE_DAC_ONESHOT);
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if (bus == NULL) {
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perimanSetBusDeinit(ESP32_BUS_TYPE_DAC_ONESHOT, dacDetachBus);
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if (!perimanClearPinBus(pin)) {
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return false;
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}
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dac_channel_t channel = (pin == DAC_CHAN0_GPIO_NUM) ? DAC_CHAN_0 : DAC_CHAN_1;
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dac_oneshot_config_t config = {.chan_id = channel};
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err = dac_oneshot_new_channel(&config, &bus);
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if (err != ESP_OK) {
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log_e("dac_oneshot_new_channel failed with error: %d", err);
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return false;
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}
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if (!perimanSetPinBus(pin, ESP32_BUS_TYPE_DAC_ONESHOT, (void *)bus, -1, channel)) {
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dacDetachBus((void *)bus);
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return false;
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}
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}
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err = dac_oneshot_output_voltage(bus, value);
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if (err != ESP_OK) {
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log_e("dac_oneshot_output_voltage failed with error: %d", err);
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return false;
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}
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return true;
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}
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bool __dacDisable(uint8_t pin) {
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if (pin != DAC_CHAN0_GPIO_NUM && pin != DAC_CHAN1_GPIO_NUM) {
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log_e("pin %u is not a DAC pin", pin);
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return false; //not dac pin
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}
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void *bus = perimanGetPinBus(pin, ESP32_BUS_TYPE_DAC_ONESHOT);
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if (bus != NULL) {
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// will call dacDetachBus
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return perimanClearPinBus(pin);
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} else {
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log_e("pin %u is not attached to DAC", pin);
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}
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return false;
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}
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extern bool dacWrite(uint8_t pin, uint8_t value) __attribute__((weak, alias("__dacWrite")));
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extern bool dacDisable(uint8_t pin) __attribute__((weak, alias("__dacDisable")));
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#endif
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