mirror of
https://github.com/sle118/squeezelite-esp32.git
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mini i2S backend to allow other DAC
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philippe44
248
components/squeezelite/tas57xx/dac_57xx.c
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248
components/squeezelite/tas57xx/dac_57xx.c
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/*
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* Squeezelite for esp32
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*
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* (c) Sebastien 2019
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* Philippe G. 2019, philippe_44@outlook.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "squeezelite.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/i2s.h"
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#include "driver/i2c.h"
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#include "driver/gpio.h"
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#include "adac.h"
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#define VOLUME_GPIO 14
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#define TAS575x 0x98
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#define TAS578x 0x90
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static bool init(int i2c_port_num, int i2s_num, i2s_config_t *config);
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static void deinit(void);
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static void speaker(bool active);
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static void headset(bool active);
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static void volume(unsigned left, unsigned right);
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static void power(adac_power_e mode);
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struct adac_s dac_tas57xx = { init, deinit, power, speaker, headset, volume };
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struct tas57xx_cmd_s {
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uint8_t reg;
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uint8_t value;
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};
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static const struct tas57xx_cmd_s tas57xx_init_sequence[] = {
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{ 0x00, 0x00 }, // select page 0
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{ 0x02, 0x10 }, // standby
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{ 0x0d, 0x10 }, // use SCK for PLL
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{ 0x25, 0x08 }, // ignore SCK halt
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{ 0x08, 0x10 }, // Mute control enable (from TAS5780)
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{ 0x54, 0x02 }, // Mute output control (from TAS5780)
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{ 0x02, 0x00 }, // restart
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{ 0xff, 0xff } // end of table
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};
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// matching orders
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typedef enum { TAS57_ACTIVE = 0, TAS57_STANDBY, TAS57_DOWN, TAS57_ANALOGUE_OFF, TAS57_ANALOGUE_ON, TAS57_VOLUME } dac_cmd_e;
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static const struct tas57xx_cmd_s tas57xx_cmd[] = {
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{ 0x02, 0x00 }, // TAS57_ACTIVE
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{ 0x02, 0x10 }, // TAS57_STANDBY
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{ 0x02, 0x01 }, // TAS57_DOWN
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{ 0x56, 0x10 }, // TAS57_ANALOGUE_OFF
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{ 0x56, 0x00 }, // TAS57_ANALOGUE_ON
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};
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static log_level loglevel = lINFO;
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static u8_t tas57_addr;
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static int i2c_port;
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static void dac_cmd(dac_cmd_e cmd, ...);
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static int tas57_detect(void);
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/****************************************************************************************
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* init
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*/
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static bool init(int i2c_port_num, int i2s_num, i2s_config_t *i2s_config) {
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LOG_INFO("Initializing TAS57xx ");
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i2c_port = i2c_port_num;
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// init volume & mute
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gpio_pad_select_gpio(VOLUME_GPIO);
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gpio_set_direction(VOLUME_GPIO, GPIO_MODE_OUTPUT);
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gpio_set_level(VOLUME_GPIO, 0);
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// configure i2c
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i2c_config_t i2c_config = {
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.mode = I2C_MODE_MASTER,
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.sda_io_num = 27,
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.sda_pullup_en = GPIO_PULLUP_ENABLE,
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.scl_io_num = 26,
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.scl_pullup_en = GPIO_PULLUP_ENABLE,
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.master.clk_speed = 100000,
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};
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i2c_param_config(i2c_port, &i2c_config);
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i2c_driver_install(i2c_port, I2C_MODE_MASTER, false, false, false);
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LOG_INFO("DAC using I2C sda:%u, scl:%u", i2c_config.sda_io_num, i2c_config.scl_io_num);
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// find which TAS we are using
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tas57_addr = tas57_detect();
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i2c_cmd_handle_t i2c_cmd = i2c_cmd_link_create();
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for (int i = 0; tas57xx_init_sequence[i].reg != 0xff; i++) {
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i2c_master_start(i2c_cmd);
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i2c_master_write_byte(i2c_cmd, tas57_addr | I2C_MASTER_WRITE, I2C_MASTER_NACK);
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i2c_master_write_byte(i2c_cmd, tas57xx_init_sequence[i].reg, I2C_MASTER_NACK);
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i2c_master_write_byte(i2c_cmd, tas57xx_init_sequence[i].value, I2C_MASTER_NACK);
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LOG_DEBUG("i2c write %x at %u", tas57xx_init_sequence[i].reg, tas57xx_init_sequence[i].value);
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}
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i2c_master_stop(i2c_cmd);
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esp_err_t ret = i2c_master_cmd_begin(i2c_port, i2c_cmd, 500 / portTICK_RATE_MS);
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i2c_cmd_link_delete(i2c_cmd);
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// configure I2S pins & install driver
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i2s_pin_config_t i2s_pin_config = (i2s_pin_config_t) { .bck_io_num = 33, .ws_io_num = 25,
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.data_out_num = 32, .data_in_num = -1 //Not used
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};
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i2s_driver_install(i2s_num, i2s_config, 0, NULL);
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i2s_set_pin(i2s_num, &i2s_pin_config);
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LOG_INFO("DAC using I2S bck:%u, ws:%u, do:%u", i2s_pin_config.bck_io_num, i2s_pin_config.ws_io_num, i2s_pin_config.data_out_num);
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if (ret != ESP_OK) {
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LOG_ERROR("could not intialize TAS57xx %d", ret);
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return false;
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} else {
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return true;
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}
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}
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/****************************************************************************************
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* init
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*/
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static void deinit(void) {
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i2c_driver_delete(i2c_port);
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}
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/****************************************************************************************
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* change volume
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*/
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static void volume(unsigned left, unsigned right) {
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LOG_INFO("TAS57xx volume (L:%u R:%u)", left, right);
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gpio_set_level(VOLUME_GPIO, left || right);
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}
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/****************************************************************************************
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* power
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*/
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static void power(adac_power_e mode) {
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switch(mode) {
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case ADAC_STANDBY:
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dac_cmd(TAS57_STANDBY);
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break;
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case ADAC_ON:
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dac_cmd(TAS57_ACTIVE);
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break;
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case ADAC_OFF:
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dac_cmd(TAS57_DOWN);
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break;
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default:
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LOG_WARN("unknown DAC command");
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break;
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}
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}
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/****************************************************************************************
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* speaker
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*/
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static void speaker(bool active) {
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if (active) dac_cmd(TAS57_ANALOGUE_ON);
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else dac_cmd(TAS57_ANALOGUE_OFF);
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}
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/****************************************************************************************
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* headset
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*/
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static void headset(bool active) {
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}
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/****************************************************************************************
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* DAC specific commands
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*/
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void dac_cmd(dac_cmd_e cmd, ...) {
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va_list args;
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esp_err_t ret = ESP_OK;
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va_start(args, cmd);
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i2c_cmd_handle_t i2c_cmd = i2c_cmd_link_create();
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switch(cmd) {
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case TAS57_VOLUME:
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LOG_ERROR("DAC volume not handled yet");
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break;
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default:
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i2c_master_start(i2c_cmd);
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i2c_master_write_byte(i2c_cmd, tas57_addr | I2C_MASTER_WRITE, I2C_MASTER_NACK);
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i2c_master_write_byte(i2c_cmd, tas57xx_cmd[cmd].reg, I2C_MASTER_NACK);
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i2c_master_write_byte(i2c_cmd, tas57xx_cmd[cmd].value, I2C_MASTER_NACK);
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i2c_master_stop(i2c_cmd);
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ret = i2c_master_cmd_begin(i2c_port, i2c_cmd, 50 / portTICK_RATE_MS);
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}
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i2c_cmd_link_delete(i2c_cmd);
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if (ret != ESP_OK) {
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LOG_ERROR("could not intialize TAS57xx %d", ret);
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}
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va_end(args);
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}
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/****************************************************************************************
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* TAS57 detection
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*/
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static int tas57_detect(void) {
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u8_t data, addr[] = {TAS578x, TAS575x};
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int ret;
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for (int i = 0; i < sizeof(addr); i++) {
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i2c_cmd_handle_t i2c_cmd = i2c_cmd_link_create();
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i2c_master_start(i2c_cmd);
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i2c_master_write_byte(i2c_cmd, addr[i] | I2C_MASTER_WRITE, I2C_MASTER_NACK);
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i2c_master_write_byte(i2c_cmd, 00, I2C_MASTER_NACK);
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i2c_master_start(i2c_cmd);
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i2c_master_write_byte(i2c_cmd, addr[i] | I2C_MASTER_READ, I2C_MASTER_NACK);
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i2c_master_read_byte(i2c_cmd, &data, I2C_MASTER_NACK);
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i2c_master_stop(i2c_cmd);
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ret = i2c_master_cmd_begin(i2c_port, i2c_cmd, 50 / portTICK_RATE_MS);
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i2c_cmd_link_delete(i2c_cmd);
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if (ret == ESP_OK) {
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LOG_INFO("Detected TAS @0x%x", addr[i]);
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return addr[i];
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}
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}
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return 0;
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}
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