mirror of
https://github.com/sle118/squeezelite-esp32.git
synced 2025-12-07 20:17:04 +03:00
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/*
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* Squeezelite for esp32
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*
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* (c) Wizmo 2021
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* Sebastien 2019
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* Philippe G. 2019, philippe_44@outlook.com
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*
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* This software is released under the MIT License.
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* https://opensource.org/licenses/MIT
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*
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*/
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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 "esp_log.h"
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#include "adac.h"
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static const char TAG[] = "WM8978";
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static void speaker(bool active) { }
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static void headset(bool active) { }
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static bool volume(unsigned left, unsigned right) { return false; }
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static void power(adac_power_e mode);
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static bool init(char *config, int i2c_port_num, i2s_config_t *i2s_config, bool *mck);
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static esp_err_t i2c_write_shadow(uint8_t reg, uint16_t val);
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static uint16_t i2c_read_shadow(uint8_t reg);
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static int WM8978;
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const struct adac_s dac_wm8978 = { "WM8978", init, adac_deinit, power, speaker, headset, volume };
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// initiation table for non-readbale 9-bit i2c registers
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static uint16_t WM8978_REGVAL_TBL[58] = {
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0X0000, 0X0000, 0X0000, 0X0000, 0X0050, 0X0000, 0X0140, 0X0000,
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0X0000, 0X0000, 0X0000, 0X00FF, 0X00FF, 0X0000, 0X0100, 0X00FF,
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0X00FF, 0X0000, 0X012C, 0X002C, 0X002C, 0X002C, 0X002C, 0X0000,
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0X0032, 0X0000, 0X0000, 0X0000, 0X0000, 0X0000, 0X0000, 0X0000,
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0X0038, 0X000B, 0X0032, 0X0000, 0X0008, 0X000C, 0X0093, 0X00E9,
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0X0000, 0X0000, 0X0000, 0X0000, 0X0003, 0X0010, 0X0010, 0X0100,
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0X0100, 0X0002, 0X0001, 0X0001, 0X0039, 0X0039, 0X0039, 0X0039,
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0X0001, 0X0001
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};
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/****************************************************************************************
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* init
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*/
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static bool init(char *config, int i2c_port, i2s_config_t *i2s_config, bool *mck) {
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WM8978 = adac_init(config, i2c_port);
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if (!WM8978) WM8978 = 0x1a;
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ESP_LOGI(TAG, "WM8978 detected @%d", WM8978);
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*mck = true;
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// init sequence
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i2c_write_shadow(0, 0);
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i2c_write_shadow(4, 16);
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i2c_write_shadow(6, 0);
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i2c_write_shadow(10, 8);
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i2c_write_shadow(43, 16);
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i2c_write_shadow(49, 102);
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return true;
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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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uint16_t *data, off[] = {0, 0, 0}, on[] = {11, 384, 111};
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data = (mode == ADAC_STANDBY || mode == ADAC_OFF) ? off : on;
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i2c_write_shadow(1, data[0]);
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i2c_write_shadow(2, data[1]);
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i2c_write_shadow(3, data[2]);
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}
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/****************************************************************************************
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* Write with custom reg/value structure
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*/
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static esp_err_t i2c_write_shadow(uint8_t reg, uint16_t val) {
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WM8978_REGVAL_TBL[reg] = val;
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reg = (reg << 1) | ((val >> 8) & 0x01);
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val &= 0xff;
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return adac_write_byte(WM8978, reg, val);
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}
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/****************************************************************************************
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* Return local register value
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*/
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static uint16_t i2c_read_shadow(uint8_t reg) {
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return WM8978_REGVAL_TBL[reg];
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}
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