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Driver update: I2S pdm and built-in DAC

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1. Modify I2S DAC built-in mode settings
2. Add I2S pdm mode
3. Correct I2S signal index in full-duplex mode
4. Modify dac output function
5. Add dac pad init functions
6. Modify DAC documentation
7. Add i2s_set_dac_mode API
This commit is contained in:
Wangjialin 2017-05-03 18:55:52 +08:00
parent 15a6145961
commit 1f055d28b8
6 changed files with 306 additions and 82 deletions
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199
components/driver/i2s.c
View file

@ -26,6 +26,8 @@
#include "driver/gpio.h"
#include "driver/i2s.h"
#include "driver/rtc_io.h"
#include "driver/dac.h"
#include "esp_intr.h"
#include "esp_err.h"
@ -41,7 +43,8 @@ static const char* I2S_TAG = "I2S";
#define I2S_EXIT_CRITICAL_ISR() portEXIT_CRITICAL_ISR(&i2s_spinlock[i2s_num])
#define I2S_ENTER_CRITICAL() portENTER_CRITICAL(&i2s_spinlock[i2s_num])
#define I2S_EXIT_CRITICAL() portEXIT_CRITICAL(&i2s_spinlock[i2s_num])
#define I2S_FULL_DUPLEX_SLAVE_MODE_MASK (I2S_MODE_TX | I2S_MODE_RX | I2S_MODE_SLAVE)
#define I2S_FULL_DUPLEX_MASTER_MODE_MASK (I2S_MODE_TX | I2S_MODE_RX | I2S_MODE_MASTER)
/**
* @brief DMA buffer object
@ -99,6 +102,7 @@ inline static void gpio_matrix_out_check(uint32_t gpio, uint32_t signal_idx, boo
//if pin = -1, do not need to configure
if (gpio != -1) {
PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio], PIN_FUNC_GPIO);
gpio_set_direction(gpio, GPIO_MODE_DEF_OUTPUT);
gpio_matrix_out(gpio, signal_idx, out_inv, oen_inv);
}
}
@ -106,6 +110,8 @@ inline static void gpio_matrix_in_check(uint32_t gpio, uint32_t signal_idx, bool
{
if (gpio != -1) {
PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio], PIN_FUNC_GPIO);
//Set direction, for some GPIOs, the input function are not enabled as default.
gpio_set_direction(gpio, GPIO_MODE_DEF_INPUT);
gpio_matrix_in(gpio, signal_idx, inv);
}
}
@ -181,13 +187,6 @@ esp_err_t i2s_set_clk(i2s_port_t i2s_num, uint32_t rate, i2s_bits_per_sample_t b
return ESP_FAIL;
}
if (p_i2s_obj[i2s_num]->mode & I2S_MODE_DAC_BUILT_IN) {
//DAC uses bclk as sample clock, not WS. WS can be something arbitrary.
//Rate as given to this function is the intended BCLK rate; divided by bits it will
//give the real sample rate. For DAC mode, use the real sample rate as BCLK rate instead.
rate = rate / bits;
}
double clkmdiv = (double)I2S_BASE_CLK / (rate * factor);
if (clkmdiv > 256) {
@ -206,15 +205,7 @@ esp_err_t i2s_set_clk(i2s_port_t i2s_num, uint32_t rate, i2s_bits_per_sample_t b
i2s_stop(i2s_num);
p_i2s_obj[i2s_num]->channel_num = (ch == 2) ? 2 : 1;
I2S[i2s_num]->conf_chan.tx_chan_mod = (ch == 2) ? 0 : 1; // 0-two channel;1-right;2-left;3-righ;4-left
I2S[i2s_num]->fifo_conf.tx_fifo_mod = (ch == 2) ? 0 : 1; // 0-right&left channel;1-one channel
I2S[i2s_num]->conf.tx_mono = 0;
I2S[i2s_num]->conf_chan.rx_chan_mod = (ch == 2) ? 0 : 1;
I2S[i2s_num]->fifo_conf.rx_fifo_mod = (ch == 2) ? 0 : 1;
I2S[i2s_num]->conf.rx_mono = 0;
if (bits != p_i2s_obj[i2s_num]->bits_per_sample) {
//change fifo mode
@ -273,15 +264,43 @@ esp_err_t i2s_set_clk(i2s_port_t i2s_num, uint32_t rate, i2s_bits_per_sample_t b
if (save_rx) {
i2s_destroy_dma_queue(i2s_num, save_rx);
}
}
}
clkmInteger = clkmdiv;
clkmDecimals = (clkmdiv - clkmInteger) / denom;
double mclk = clkmInteger + denom * clkmDecimals;
bck = factor/(bits * channel);
double mclk;
if (p_i2s_obj[i2s_num]->mode & I2S_MODE_DAC_BUILT_IN) {
//DAC uses bclk as sample clock, not WS. WS can be something arbitrary.
//Rate as given to this function is the intended sample rate;
//According to the TRM, WS clk equals to the sample rate, and bclk is double the speed of WS
uint32_t b_clk = rate * 2;
int factor2 = 60;
mclk = b_clk * factor2;
clkmdiv = ((double) I2S_BASE_CLK) / mclk;
clkmInteger = clkmdiv;
clkmDecimals = (clkmdiv - clkmInteger) / denom;
bck = mclk / b_clk;
} else if (p_i2s_obj[i2s_num]->mode & I2S_MODE_PDM) {
uint32_t b_clk = 0;
if (p_i2s_obj[i2s_num]->mode & I2S_MODE_TX) {
int fp = I2S[i2s_num]->pdm_freq_conf.tx_pdm_fp;
int fs = I2S[i2s_num]->pdm_freq_conf.tx_pdm_fs;
b_clk = rate * 64 * (fp / fs);
} else if (p_i2s_obj[i2s_num]->mode & I2S_MODE_RX) {
b_clk = rate * 64 * (I2S[i2s_num]->pdm_conf.rx_sinc_dsr_16_en + 1);
}
int factor2 = 5 ;
mclk = b_clk * factor2;
clkmdiv = ((double) I2S_BASE_CLK) / mclk;
clkmInteger = clkmdiv;
clkmDecimals = (clkmdiv - clkmInteger) / denom;
bck = mclk / b_clk;
} else {
clkmInteger = clkmdiv;
clkmDecimals = (clkmdiv - clkmInteger) / denom;
mclk = clkmInteger + denom * clkmDecimals;
bck = factor/(bits * channel);
}
I2S[i2s_num]->clkm_conf.clka_en = 0;
I2S[i2s_num]->clkm_conf.clkm_div_a = 63;
@ -291,7 +310,7 @@ esp_err_t i2s_set_clk(i2s_port_t i2s_num, uint32_t rate, i2s_bits_per_sample_t b
I2S[i2s_num]->sample_rate_conf.rx_bck_div_num = bck;
I2S[i2s_num]->sample_rate_conf.tx_bits_mod = bits;
I2S[i2s_num]->sample_rate_conf.rx_bits_mod = bits;
double real_rate = (double)(I2S_BASE_CLK / (bck * bits * clkmInteger)/2);
double real_rate = (double) (I2S_BASE_CLK / (bck * bits * clkmInteger) / 2);
ESP_LOGI(I2S_TAG, "Req RATE: %d, real rate: %0.3f, BITS: %u, CLKM: %u, BCK: %u, MCLK: %0.3f, SCLK: %f, diva: %d, divb: %d",
rate, real_rate, bits, clkmInteger, bck, (double)I2S_BASE_CLK / mclk, real_rate*bits*channel, 64, clkmDecimals);
@ -504,22 +523,25 @@ esp_err_t i2s_stop(i2s_port_t i2s_num)
return 0;
}
static esp_err_t configure_dac_pin(void)
esp_err_t i2s_set_dac_mode(i2s_dac_mode_t dac_mode)
{
SET_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_DAC_DIG_FORCE_M);
SET_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_DAC_CLK_INV_M);
I2S_CHECK((dac_mode < I2S_DAC_CHANNEL_MAX), "i2s dac mode error", ESP_ERR_INVALID_ARG);
if(dac_mode == I2S_DAC_CHANNEL_DISABLE) {
dac_output_disable(DAC_CHANNEL_1);
dac_output_disable(DAC_CHANNEL_1);
dac_i2s_disable();
} else {
dac_i2s_enable();
}
SET_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_DAC_XPD_FORCE_M);
SET_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC_M);
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_RUE_M);
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_RDE_M);
SET_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_DAC_XPD_FORCE_M);
SET_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC_M);
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_RUE_M);
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_RDE_M);
if (dac_mode & I2S_DAC_CHANNEL_RIGHT_EN) {
//DAC1, right channel, GPIO25
dac_output_enable(DAC_CHANNEL_1);
}
if (dac_mode & I2S_DAC_CHANNEL_LEFT_EN) {
//DAC2, left channel, GPIO26
dac_output_enable(DAC_CHANNEL_2);
}
return ESP_OK;
}
@ -527,7 +549,7 @@ esp_err_t i2s_set_pin(i2s_port_t i2s_num, const i2s_pin_config_t *pin)
{
I2S_CHECK((i2s_num < I2S_NUM_MAX), "i2s_num error", ESP_ERR_INVALID_ARG);
if (pin == NULL) {
return configure_dac_pin();
return i2s_set_dac_mode(I2S_DAC_CHANNEL_BOTH_EN);
}
if (pin->bck_io_num != -1 && !GPIO_IS_VALID_GPIO(pin->bck_io_num)) {
ESP_LOGE(I2S_TAG, "bck_io_num error");
@ -547,47 +569,76 @@ esp_err_t i2s_set_pin(i2s_port_t i2s_num, const i2s_pin_config_t *pin)
}
int bck_sig = -1, ws_sig = -1, data_out_sig = -1, data_in_sig = -1;
//TX & RX
//Each IIS hw module has a RX and TX unit.
//For TX unit, the output signal index should be I2SnO_xxx_OUT_IDX
//For TX unit, the input signal index should be I2SnO_xxx_IN_IDX
if (p_i2s_obj[i2s_num]->mode & I2S_MODE_TX) {
if (p_i2s_obj[i2s_num]->mode & I2S_MODE_MASTER) {
bck_sig = I2S0O_BCK_OUT_IDX;
ws_sig = I2S0O_WS_OUT_IDX;
data_out_sig = I2S0O_DATA_OUT23_IDX;
if (i2s_num == I2S_NUM_1) {
if (i2s_num == I2S_NUM_0) {
bck_sig = I2S0O_BCK_OUT_IDX;
ws_sig = I2S0O_WS_OUT_IDX;
data_out_sig = I2S0O_DATA_OUT23_IDX;
} else {
bck_sig = I2S1O_BCK_OUT_IDX;
ws_sig = I2S1O_WS_OUT_IDX;
data_out_sig = I2S1O_DATA_OUT23_IDX;
}
} else if (p_i2s_obj[i2s_num]->mode & I2S_MODE_SLAVE) {
bck_sig = I2S0O_BCK_IN_IDX;
ws_sig = I2S0O_WS_IN_IDX;
data_out_sig = I2S0O_DATA_OUT23_IDX;
if (i2s_num == I2S_NUM_1) {
if (i2s_num == I2S_NUM_0) {
bck_sig = I2S0O_BCK_IN_IDX;
ws_sig = I2S0O_WS_IN_IDX;
data_out_sig = I2S0O_DATA_OUT23_IDX;
} else {
bck_sig = I2S1O_BCK_IN_IDX;
ws_sig = I2S1O_WS_IN_IDX;
data_out_sig = I2S1O_DATA_OUT23_IDX;
}
}
}
//For RX unit, the output signal index should be I2SnI_xxx_OUT_IDX
//For RX unit, the input signal index shuld be I2SnI_xxx_IN_IDX
if (p_i2s_obj[i2s_num]->mode & I2S_MODE_RX) {
if (p_i2s_obj[i2s_num]->mode & I2S_MODE_MASTER) {
if (p_i2s_obj[i2s_num]->mode & I2S_MODE_MASTER) {
if (i2s_num == I2S_NUM_0) {
bck_sig = I2S0I_BCK_OUT_IDX;
ws_sig = I2S0I_WS_OUT_IDX;
data_in_sig = I2S0I_DATA_IN15_IDX;
if (i2s_num == I2S_NUM_1) {
bck_sig = I2S1O_BCK_OUT_IDX;
ws_sig = I2S1O_WS_OUT_IDX;
data_in_sig = I2S1I_DATA_IN15_IDX;
}
} else if (p_i2s_obj[i2s_num]->mode & I2S_MODE_SLAVE) {
} else {
bck_sig = I2S1I_BCK_OUT_IDX;
ws_sig = I2S1I_WS_OUT_IDX;
data_in_sig = I2S1I_DATA_IN15_IDX;
}
} else if (p_i2s_obj[i2s_num]->mode & I2S_MODE_SLAVE) {
if (i2s_num == I2S_NUM_0) {
bck_sig = I2S0I_BCK_IN_IDX;
ws_sig = I2S0I_WS_IN_IDX;
data_in_sig = I2S0I_DATA_IN15_IDX;
if (i2s_num == I2S_NUM_1) {
bck_sig = I2S1I_BCK_IN_IDX;
ws_sig = I2S1I_WS_IN_IDX;
data_in_sig = I2S1I_DATA_IN15_IDX;
}
} else {
bck_sig = I2S1I_BCK_IN_IDX;
ws_sig = I2S1I_WS_IN_IDX;
data_in_sig = I2S1I_DATA_IN15_IDX;
}
}
}
//For "full-duplex + slave" mode, we should select RX signal index for ws and bck.
//For "full-duplex + master" mode, we should select TX signal index for ws and bck.
if ((p_i2s_obj[i2s_num]->mode & I2S_FULL_DUPLEX_SLAVE_MODE_MASK) == I2S_FULL_DUPLEX_SLAVE_MODE_MASK) {
if (i2s_num == I2S_NUM_0) {
bck_sig = I2S0I_BCK_IN_IDX;
ws_sig = I2S0I_WS_IN_IDX;
} else {
bck_sig = I2S1I_BCK_IN_IDX;
ws_sig = I2S1I_WS_IN_IDX;
}
} else if ((p_i2s_obj[i2s_num]->mode & I2S_FULL_DUPLEX_MASTER_MODE_MASK) == I2S_FULL_DUPLEX_MASTER_MODE_MASK) {
if (i2s_num == I2S_NUM_0) {
bck_sig = I2S0O_BCK_OUT_IDX;
ws_sig = I2S0O_WS_OUT_IDX;
} else {
bck_sig = I2S1O_BCK_OUT_IDX;
ws_sig = I2S1O_WS_OUT_IDX;
}
}
gpio_matrix_out_check(pin->data_out_num, data_out_sig, 0, 0);
gpio_matrix_in_check(pin->data_in_num, data_in_sig, 0);
@ -613,11 +664,13 @@ static esp_err_t i2s_param_config(i2s_port_t i2s_num, const i2s_config_t *i2s_co
{
I2S_CHECK((i2s_num < I2S_NUM_MAX), "i2s_num error", ESP_ERR_INVALID_ARG);
I2S_CHECK((i2s_config), "param null", ESP_ERR_INVALID_ARG);
if (i2s_num == I2S_NUM_1) {
periph_module_enable(PERIPH_I2S1_MODULE);
} else {
periph_module_enable(PERIPH_I2S0_MODULE);
}
// configure I2S data port interface.
i2s_reset_fifo(i2s_num);
@ -671,7 +724,7 @@ static esp_err_t i2s_param_config(i2s_port_t i2s_num, const i2s_config_t *i2s_co
I2S[i2s_num]->conf.tx_right_first = 0;
I2S[i2s_num]->conf.tx_slave_mod = 0; // Master
I2S[i2s_num]->fifo_conf.tx_fifo_mod_force_en = 1;//?
I2S[i2s_num]->fifo_conf.tx_fifo_mod_force_en = 1;
if (i2s_config->mode & I2S_MODE_SLAVE) {
I2S[i2s_num]->conf.tx_slave_mod = 1;//TX Slave
@ -682,7 +735,7 @@ static esp_err_t i2s_param_config(i2s_port_t i2s_num, const i2s_config_t *i2s_co
I2S[i2s_num]->conf.rx_msb_right = 0;
I2S[i2s_num]->conf.rx_right_first = 0;
I2S[i2s_num]->conf.rx_slave_mod = 0; // Master
I2S[i2s_num]->fifo_conf.rx_fifo_mod_force_en = 1;//?
I2S[i2s_num]->fifo_conf.rx_fifo_mod_force_en = 1;
if (i2s_config->mode & I2S_MODE_SLAVE) {
I2S[i2s_num]->conf.rx_slave_mod = 1;//RX Slave
@ -692,9 +745,26 @@ static esp_err_t i2s_param_config(i2s_port_t i2s_num, const i2s_config_t *i2s_co
if (i2s_config->mode & I2S_MODE_DAC_BUILT_IN) {
I2S[i2s_num]->conf2.lcd_en = 1;
I2S[i2s_num]->conf.tx_right_first = 1;
I2S[i2s_num]->fifo_conf.tx_fifo_mod = 3;
}
if (i2s_config->mode & I2S_MODE_PDM) {
I2S[i2s_num]->fifo_conf.rx_fifo_mod_force_en = 1;
I2S[i2s_num]->fifo_conf.tx_fifo_mod_force_en = 1;
I2S[i2s_num]->pdm_freq_conf.tx_pdm_fp = 960;
I2S[i2s_num]->pdm_freq_conf.tx_pdm_fs = i2s_config->sample_rate / 1000 * 10;
I2S[i2s_num]->pdm_conf.tx_sinc_osr2 = I2S[i2s_num]->pdm_freq_conf.tx_pdm_fp / I2S[i2s_num]->pdm_freq_conf.tx_pdm_fs;
I2S[i2s_num]->pdm_conf.rx_sinc_dsr_16_en = 0;
I2S[i2s_num]->pdm_conf.rx_pdm_en = 1;
I2S[i2s_num]->pdm_conf.tx_pdm_en = 1;
I2S[i2s_num]->pdm_conf.pcm2pdm_conv_en = 1;
I2S[i2s_num]->pdm_conf.pdm2pcm_conv_en = 1;
} else {
I2S[i2s_num]->pdm_conf.rx_pdm_en = 0;
I2S[i2s_num]->pdm_conf.tx_pdm_en = 0;
}
if (i2s_config->communication_format & I2S_COMM_FORMAT_I2S) {
I2S[i2s_num]->conf.tx_short_sync = 0;
I2S[i2s_num]->conf.rx_short_sync = 0;
@ -778,6 +848,13 @@ esp_err_t i2s_driver_install(i2s_port_t i2s_num, const i2s_config_t *i2s_config,
p_i2s_obj[i2s_num]->bytes_per_sample = 0; // Not initialized yet
p_i2s_obj[i2s_num]->channel_num = i2s_config->channel_format < I2S_CHANNEL_FMT_ONLY_RIGHT ? 2 : 1;
//To make sure hardware is enabled before any hardware register operations.
if (i2s_num == I2S_NUM_1) {
periph_module_enable(PERIPH_I2S1_MODULE);
} else {
periph_module_enable(PERIPH_I2S0_MODULE);
}
//initial interrupt
err = i2s_isr_register(i2s_num, i2s_config->intr_alloc_flags, i2s_intr_handler_default, p_i2s_obj[i2s_num], &p_i2s_obj[i2s_num]->i2s_isr_handle);
if (err != ESP_OK) {

51
components/driver/include/driver/dac.h
View file

@ -28,13 +28,31 @@ typedef enum {
DAC_CHANNEL_MAX,
} dac_channel_t;
/**
* @brief Set DAC output voltage.
*
* @note Function has been deprecated, please use dac_output_voltage instead.
* This name will be removed in a future release.
* The difference is that before calling dac_output_voltage, we need to initialize the dac pad by dac_output_enable
*
*
* @param channel DAC channel
* @param dac_value DAC output value
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
*/
esp_err_t dac_out_voltage(dac_channel_t channel, uint8_t dac_value) __attribute__ ((deprecated));
/**
* @brief Set DAC output voltage.
*
* DAC output is 8-bit. Maximum (255) corresponds to VDD.
*
* @note When this function is called, function for the DAC
* channel's GPIO pin is reconfigured for RTC DAC function.
* @note Need to configure DAC pad before calling this function.
* DAC channel 1 is attached to GPIO25, DAC channel 2 is attached to GPIO26
*
* @param channel DAC channel
* @param dac_value DAC output value
@ -43,8 +61,35 @@ typedef enum {
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
*/
esp_err_t dac_out_voltage(dac_channel_t channel, uint8_t dac_value);
esp_err_t dac_output_voltage(dac_channel_t channel, uint8_t dac_value);
/**
* @brief DAC pad output enable
*
* @param channel DAC channel
* @note DAC channel 1 is attached to GPIO25, DAC channel 2 is attached to GPIO26
* I2S left channel will be mapped to DAC channel 2
* I2S right channel will be mapped to DAC channel 1
*/
esp_err_t dac_output_enable(dac_channel_t channel);
/**
* @brief DAC pad output disable
*
* @param channel DAC channel
* @note DAC channel 1 is attached to GPIO25, DAC channel 2 is attached to GPIO26
*/
esp_err_t dac_output_disable(dac_channel_t channel);
/**
* @brief Enable DAC output data from I2S
*/
esp_err_t dac_i2s_enable();
/**
* @brief Disable DAC output data from I2S
*/
esp_err_t dac_i2s_disable();
#ifdef __cplusplus
}
#endif

38
components/driver/include/driver/i2s.h
View file

@ -109,13 +109,17 @@ typedef enum {
/**
* @brief I2S Mode, defaut is I2S_MODE_MASTER | I2S_MODE_TX
*
* @note PDM and built-in DAC functions are only supported on I2S0 for current ESP32 chip.
*
*/
typedef enum {
I2S_MODE_MASTER = 1,
I2S_MODE_SLAVE = 2,
I2S_MODE_TX = 4,
I2S_MODE_RX = 8,
I2S_MODE_DAC_BUILT_IN = 16
I2S_MODE_DAC_BUILT_IN = 16, /*!< Output I2S data to built-in DAC, no matter the data format is 16bit or 32 bit, the DAC module will only take the 8bits from MSB*/
//I2S_MODE_ADC_BUILT_IN = 32, /*!< Currently not supported yet, will be added for the next version*/
I2S_MODE_PDM = 64,
} i2s_mode_t;
/**
@ -144,6 +148,19 @@ typedef enum {
I2S_EVENT_MAX, /*!< I2S event max index*/
} i2s_event_type_t;
/**
* @brief I2S DAC mode for i2s_set_dac_mode.
*
* @note PDM and built-in DAC functions are only supported on I2S0 for current ESP32 chip.
*/
typedef enum {
I2S_DAC_CHANNEL_DISABLE = 0, /*!< Disable I2S built-in DAC signals*/
I2S_DAC_CHANNEL_RIGHT_EN = 1, /*!< Enable I2S built-in DAC right channel, maps to DAC channel 1 on GPIO25*/
I2S_DAC_CHANNEL_LEFT_EN = 2, /*!< Enable I2S built-in DAC left channel, maps to DAC channel 2 on GPIO26*/
I2S_DAC_CHANNEL_BOTH_EN = 0x3, /*!< Enable both of the I2S built-in DAC channels.*/
I2S_DAC_CHANNEL_MAX = 0x4, /*!< I2S built-in DAC mode max index*/
} i2s_dac_mode_t;
/**
* @brief Event structure used in I2S event queue
*
@ -166,6 +183,7 @@ typedef struct {
int data_in_num; /*!< DATA in pin*/
} i2s_pin_config_t;
typedef intr_handle_t i2s_isr_handle_t;
/**
* @brief Set I2S pin number
@ -181,12 +199,30 @@ typedef intr_handle_t i2s_isr_handle_t;
* Inside the pin configuration structure, set I2S_PIN_NO_CHANGE for any pin where
* the current configuration should not be changed.
*
* @note if *pin is set as NULL, this function will initialize both of the built-in DAC channels by default.
* if you don't want this to happen and you want to initialize only one of the DAC channels, you can call i2s_set_dac_mode instead.
*
* @return
* - ESP_OK Success
* - ESP_FAIL Parameter error
*/
esp_err_t i2s_set_pin(i2s_port_t i2s_num, const i2s_pin_config_t *pin);
/**
* @brief Set I2S dac mode, I2S built-in DAC is disabled by default
*
* @param dac_mode DAC mode configurations - see i2s_dac_mode_t
*
* @note Built-in DAC functions are only supported on I2S0 for current ESP32 chip.
* If either of the built-in DAC channel are enabled, the other one can not
* be used as RTC DAC function at the same time.
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG Parameter error
*/
esp_err_t i2s_set_dac_mode(i2s_dac_mode_t dac_mode);
/**
* @brief Install and start I2S driver.
*

79
components/driver/rtc_module.c
View file

@ -37,6 +37,8 @@ static const char *RTC_MODULE_TAG = "RTC_MODULE";
return ESP_FAIL;\
}
#define DAC_ERR_STR_CHANNEL_ERROR "DAC channel error"
portMUX_TYPE rtc_spinlock = portMUX_INITIALIZER_UNLOCKED;
static xSemaphoreHandle rtc_touch_sem = NULL;
@ -607,7 +609,8 @@ int adc1_get_voltage(adc1_channel_t channel)
---------------------------------------------------------------*/
static esp_err_t dac_pad_get_io_num(dac_channel_t channel, gpio_num_t *gpio_num)
{
RTC_MODULE_CHECK(channel < DAC_CHANNEL_MAX, "DAC Channel Err", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK(gpio_num, "Param null", ESP_ERR_INVALID_ARG);
switch (channel) {
case DAC_CHANNEL_1:
@ -625,7 +628,7 @@ static esp_err_t dac_pad_get_io_num(dac_channel_t channel, gpio_num_t *gpio_num)
static esp_err_t dac_rtc_pad_init(dac_channel_t channel)
{
RTC_MODULE_CHECK(channel < DAC_CHANNEL_MAX, "DAC Channel Err", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
gpio_num_t gpio_num = 0;
dac_pad_get_io_num(channel, &gpio_num);
rtc_gpio_init(gpio_num);
@ -637,26 +640,64 @@ static esp_err_t dac_rtc_pad_init(dac_channel_t channel)
return ESP_OK;
}
static esp_err_t dac_out_enable(dac_channel_t channel)
esp_err_t dac_output_enable(dac_channel_t channel)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
dac_rtc_pad_init(channel);
portENTER_CRITICAL(&rtc_spinlock);
if (channel == DAC_CHANNEL_1) {
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC | RTC_IO_PDAC1_DAC_XPD_FORCE);
portEXIT_CRITICAL(&rtc_spinlock);
} else if (channel == DAC_CHANNEL_2) {
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);
portEXIT_CRITICAL(&rtc_spinlock);
} else {
return ESP_ERR_INVALID_ARG;
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t dac_output_disable(dac_channel_t channel)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
if (channel == DAC_CHANNEL_1) {
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_XPD_DAC | RTC_IO_PDAC1_DAC_XPD_FORCE);
} else if (channel == DAC_CHANNEL_2) {
CLEAR_PERI_REG_MASK(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_XPD_DAC | RTC_IO_PDAC2_DAC_XPD_FORCE);
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t dac_output_voltage(dac_channel_t channel, uint8_t dac_value)
{
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
//Disable Tone
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_SW_TONE_EN);
//Disable Channel Tone
if (channel == DAC_CHANNEL_1) {
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN1_M);
} else if (channel == DAC_CHANNEL_2) {
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL2_REG, SENS_DAC_CW_EN2_M);
}
//Set the Dac value
if (channel == DAC_CHANNEL_1) {
SET_PERI_REG_BITS(RTC_IO_PAD_DAC1_REG, RTC_IO_PDAC1_DAC, dac_value, RTC_IO_PDAC1_DAC_S); //dac_output
} else if (channel == DAC_CHANNEL_2) {
SET_PERI_REG_BITS(RTC_IO_PAD_DAC2_REG, RTC_IO_PDAC2_DAC, dac_value, RTC_IO_PDAC2_DAC_S); //dac_output
}
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t dac_out_voltage(dac_channel_t channel, uint8_t dac_value)
{
RTC_MODULE_CHECK(channel < DAC_CHANNEL_MAX, "DAC Channel Err", ESP_ERR_INVALID_ARG);
RTC_MODULE_CHECK((channel >= DAC_CHANNEL_1) && (channel < DAC_CHANNEL_MAX), DAC_ERR_STR_CHANNEL_ERROR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&rtc_spinlock);
//Disable Tone
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_SW_TONE_EN);
@ -678,11 +719,27 @@ esp_err_t dac_out_voltage(dac_channel_t channel, uint8_t dac_value)
portEXIT_CRITICAL(&rtc_spinlock);
//dac pad init
dac_rtc_pad_init(channel);
dac_out_enable(channel);
dac_output_enable(channel);
return ESP_OK;
}
esp_err_t dac_i2s_enable()
{
portENTER_CRITICAL(&rtc_spinlock);
SET_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_DAC_DIG_FORCE_M | SENS_DAC_CLK_INV_M);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
esp_err_t dac_i2s_disable()
{
portENTER_CRITICAL(&rtc_spinlock);
CLEAR_PERI_REG_MASK(SENS_SAR_DAC_CTRL1_REG, SENS_DAC_DIG_FORCE_M | SENS_DAC_CLK_INV_M);
portEXIT_CRITICAL(&rtc_spinlock);
return ESP_OK;
}
/*---------------------------------------------------------------
HALL SENSOR
---------------------------------------------------------------*/

12
docs/api-reference/peripherals/dac.rst
View file

@ -22,7 +22,8 @@ Setting DAC channel 1 (GPIO 25) voltage to approx 0.78 of VDD_A voltage (VDD * 2
...
dac_out_voltage(DAC_CHANNEL_1, 200);
dac_output_enable(DAC_CHANNEL_1);
dac_output_voltage(DAC_CHANNEL_1, 200);
API Reference
-------------
@ -40,6 +41,9 @@ Enumerations
Functions
^^^^^^^^^
.. doxygenfunction:: dac_out_voltage
.. doxygenfunction:: dac_output_voltage
.. doxygenfunction:: dac_output_enable
.. doxygenfunction:: dac_output_disable
.. doxygenfunction:: dac_i2s_enable
.. doxygenfunction:: dac_i2s_disable

9
docs/api-reference/peripherals/i2s.rst
View file

@ -60,7 +60,7 @@ Short example configuring I2S to use internal DAC for analog output::
static const i2s_config_t i2s_config = {
.mode = I2S_MODE_MASTER | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN,
.sample_rate = 44100,
.bits_per_sample = 8, /* must be 8 for built-in DAC */
.bits_per_sample = 16, /* the DAC module will only take the 8bits from MSB */
.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
.communication_format = I2S_COMM_FORMAT_I2S_MSB,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1, // high interrupt priority
@ -72,7 +72,10 @@ Short example configuring I2S to use internal DAC for analog output::
i2s_driver_install(i2s_num, &i2s_config, 0, NULL); //install and start i2s driver
i2s_set_pin(i2s_num, NULL); //for internal DAC
i2s_set_pin(i2s_num, NULL); //for internal DAC, this will enable both of the internal channels
//You can call i2s_set_dac_mode to set built-in DAC output mode.
//i2s_set_dac_mode(I2S_DAC_CHANNEL_BOTH_EN);
i2s_set_sample_rates(i2s_num, 22050); //set sample rates
@ -112,11 +115,13 @@ Enumerations
.. doxygenenum:: i2s_port_t
.. doxygenenum:: i2s_mode_t
.. doxygenenum:: i2s_event_type_t
.. doxygenenum:: i2s_dac_mode_t
Functions
^^^^^^^^^
.. doxygenfunction:: i2s_set_pin
.. doxygenfunction:: i2s_set_dac_mode
.. doxygenfunction:: i2s_driver_install
.. doxygenfunction:: i2s_driver_uninstall
.. doxygenfunction:: i2s_write_bytes