i was able to setup a fully working STM32CubeIDE project. as there is no I2S support in STM32duino ( yet ), i copied over the relevant code from the generated STM32CubeIDE project and added `#define HAL_I2S_MODULE_ENABLED` to the `variant.h` file.
although the sketch compiles, unfortunately the audio codec produces no sound. connecting my oscilloscope i was able to track down the problem to the data-out pin ( i.e `I2S2_SDO` :: `PC3_C` ). i then experimented with different DMA streams and channels but the pin remains inactive.
however, sending data *manually* to the audio codec ( `HAL_I2S_Transmit()` ) works just fine and even the data-in pin returns signals.
unfortunately i am running out of ideas of where the problem might occur. i looked at the linker script, in the compiler settings
so my question is if anybody has any idea of where the problem might originate or where a relevant difference between STM32CubeIDE and STM32duino code and compiler settings might be ( and i know that there are some e.g different compiler versions etcetera )?
i post the sketch here although it is quite messy and convoluted:
Code: Select all
#define B1_Pin GPIO_PIN_13
#define B1_GPIO_Port GPIOC
#define LD1_Pin GPIO_PIN_0
#define LD1_GPIO_Port GPIOB
#define LD2_Pin GPIO_PIN_1
#define LD2_GPIO_Port GPIOE
#define LD3_Pin GPIO_PIN_14
#define LD3_GPIO_Port GPIOB
I2S_HandleTypeDef hi2s2;
DMA_HandleTypeDef hdma_spi2_rx;
DMA_HandleTypeDef hdma_spi2_tx;
I2C_HandleTypeDef hi2c2;
#define I2C_TX_handle &hi2c2
#define I2C_RX_handle &hi2c2
#define AUDIO_INPUT_LINEIN 0
#define AUDIO_INPUT_MIC 1
#define I2S_USE_DMA 1
#include "stm32_def_build.h"
void setup() {
Serial.begin(115200);
Serial.println();
Serial.println("--------------------------------------------");
Serial.println(__DATE__);
Serial.println(__TIME__);
Serial.println("--------------------------------------------");
MX_GPIO_Init();
MX_DMA_Init();
MX_I2S2_Init();
MX_I2C2_Init();
WM8731_init();
WM8731_inputSelect(AUDIO_INPUT_MIC);
WM8731_volumeInteger(110);
#if I2S_USE_DMA
StartAudioBuffers(&hi2s2); // - `I2S2_SDO` :: `PC3_C` is not triggered … why?!?!
#endif
}
void loop() {
#if I2S_USE_DMA
HAL_GPIO_TogglePin(LD1_GPIO_Port, LD1_Pin);
// HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
// HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);
HAL_Delay(1000);
#else
static uint16_t foo[2] = {0, 0};
foo[0] += 129;
foo[1] += 255;
HAL_I2S_Transmit(&hi2s2, foo, 2, 1000000);
#endif
}
bool I2C_TX_write(uint8_t device_address, uint8_t *data, uint8_t length) {
HAL_StatusTypeDef mResult = HAL_I2C_Master_Transmit(I2C_TX_handle,
device_address, data, length, 10);
if (mResult != HAL_OK) {
Serial.println("--- ERROR @ I2C_TX_write");
return false;
}
return true;
}
bool I2C_RX_write(uint8_t device_address, uint8_t *data, uint8_t length) {
HAL_StatusTypeDef mResult = HAL_I2C_Master_Transmit(I2C_RX_handle,
device_address, data, length, 10);
if (mResult != HAL_OK) {
Serial.println("--- ERROR @ I2C_RX_write");
return false;
}
return true;
}
/* -------------------------------------------------------------------------------- */
#define I2S_BUFFER_SIZE 64
uint32_t dma_TX_buffer[I2S_BUFFER_SIZE];
uint32_t dma_RX_buffer[I2S_BUFFER_SIZE];
float osc_phi = 0;
float osc_phi_inc = 440.0f / 44100.0f; // generating 440HZ
uint8_t mCounterHAL_I2S_RxCpltCallback = 0;
uint8_t mCounterHAL_I2S_TxCpltCallback = 0;
void FillBuffer(uint32_t *buffer, uint16_t len) {
float a;
int16_t y;
uint16_t c;
for (c = 0; c < len; c++) {
a = (float) sin(osc_phi * 6.2832f) * 0.20f;
osc_phi += osc_phi_inc;
osc_phi -= (float) ((uint16_t) osc_phi);
y = (int16_t) (a * 32767.0f);
buffer[c] = ((uint32_t) (uint16_t) y) << 0 | ((uint32_t) (uint16_t) y) << 16;
}
}
void StartAudioBuffers(I2S_HandleTypeDef *hi2s) {
memset(dma_TX_buffer, 0, sizeof(dma_TX_buffer));
memset(dma_RX_buffer, 0, sizeof(dma_RX_buffer));
if (HAL_I2S_Transmit_DMA(hi2s, (uint16_t*) dma_TX_buffer, I2S_BUFFER_SIZE << 1) != HAL_OK) {
Error_Handler();
}
hi2s2.State = HAL_I2S_STATE_READY; // state flag needs to be cleared manually
if (HAL_I2S_Receive_DMA(hi2s, (uint16_t*) dma_RX_buffer, I2S_BUFFER_SIZE << 1) != HAL_OK) {
Error_Handler();
}
}
void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef *hi2s) {
FillBuffer(&(dma_TX_buffer[I2S_BUFFER_SIZE >> 1]), I2S_BUFFER_SIZE >> 1);
mCounterHAL_I2S_TxCpltCallback++;
if (mCounterHAL_I2S_TxCpltCallback == 0) {
HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
}
}
void HAL_I2S_TxHalfCpltCallback(I2S_HandleTypeDef *hi2s) {
FillBuffer(&(dma_TX_buffer[0]), I2S_BUFFER_SIZE >> 1);
}
void HAL_I2S_RxCpltCallback(I2S_HandleTypeDef *hi2s) {
mCounterHAL_I2S_RxCpltCallback++;
if (mCounterHAL_I2S_RxCpltCallback == 0) {
HAL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);
}
}
void _Error_Handler(const char * c, int i) {
Serial.print("ERROR in line: "); Serial.println(i);
}
/* -------------------------------------------------------------------------------- */
/* copied from `main.c`, `stm32h7xx_hal_msp.c`, `stm32h7xx_it.c` */
/* -------------------------------------------------------------------------------- */
extern "C" {
/**
@brief System Clock Configuration
@retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
/** Supply configuration update enable
*/
HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}
/** Initializes the RCC Oscillators according to the specified parameters
in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
RCC_OscInitStruct.HSIState = RCC_HSI_DIV1;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 1;
RCC_OscInitStruct.PLL.PLLN = 24;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 4;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2
| RCC_CLOCKTYPE_D3PCLK1 | RCC_CLOCKTYPE_D1PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV1;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USART3 | RCC_PERIPHCLK_SPI2
| RCC_PERIPHCLK_I2C2 | RCC_PERIPHCLK_USB;
PeriphClkInitStruct.Spi123ClockSelection = RCC_SPI123CLKSOURCE_PLL;
PeriphClkInitStruct.Usart234578ClockSelection = RCC_USART234578CLKSOURCE_D2PCLK1;
PeriphClkInitStruct.I2c123ClockSelection = RCC_I2C123CLKSOURCE_D2PCLK1;
PeriphClkInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_PLL;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Enable USB Voltage detector
*/
HAL_PWREx_EnableUSBVoltageDetector();
}
/**
@brief I2C2 Initialization Function
@param None
@retval None
*/
void MX_I2C2_Init(void)
{
/* USER CODE BEGIN I2C2_Init 0 */
/* USER CODE END I2C2_Init 0 */
/* USER CODE BEGIN I2C2_Init 1 */
/* USER CODE END I2C2_Init 1 */
hi2c2.Instance = I2C2;
hi2c2.Init.Timing = 0x10707DBC;
hi2c2.Init.OwnAddress1 = 0;
hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c2.Init.OwnAddress2 = 0;
hi2c2.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c2) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c2, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c2, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C2_Init 2 */
/* USER CODE END I2C2_Init 2 */
}
/**
@brief I2S2 Initialization Function
@param None
@retval None
*/
void MX_I2S2_Init(void)
{
/* USER CODE BEGIN I2S2_Init 0 */
/* USER CODE END I2S2_Init 0 */
/* USER CODE BEGIN I2S2_Init 1 */
/* USER CODE END I2S2_Init 1 */
hi2s2.Instance = SPI2;
hi2s2.Init.Mode = I2S_MODE_MASTER_TX;
hi2s2.Init.Standard = I2S_STANDARD_PHILIPS;
hi2s2.Init.DataFormat = I2S_DATAFORMAT_16B;
hi2s2.Init.MCLKOutput = I2S_MCLKOUTPUT_ENABLE;
hi2s2.Init.AudioFreq = I2S_AUDIOFREQ_44K;
hi2s2.Init.CPOL = I2S_CPOL_LOW;
hi2s2.Init.FirstBit = I2S_FIRSTBIT_MSB;
hi2s2.Init.WSInversion = I2S_WS_INVERSION_DISABLE;
hi2s2.Init.Data24BitAlignment = I2S_DATA_24BIT_ALIGNMENT_RIGHT;
hi2s2.Init.MasterKeepIOState = I2S_MASTER_KEEP_IO_STATE_DISABLE;
if (HAL_I2S_Init(&hi2s2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2S2_Init 2 */
hi2s2.Init.Mode = I2S_MODE_MASTER_FULLDUPLEX; /* fixes bug in CubeMX */
if (HAL_I2S_Init(&hi2s2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE END I2S2_Init 2 */
}
/**
Enable DMA controller clock
*/
void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA2_CLK_ENABLE();
/* DMA interrupt init */
/* DMA2_Stream0_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);
/* DMA2_Stream1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA2_Stream1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream1_IRQn);
}
/**
@brief GPIO Initialization Function
@param None
@retval None
*/
void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, LD1_Pin | LD3_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
/*Configure GPIO pin : B1_Pin */
GPIO_InitStruct.Pin = B1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pins : PC1 PC4 PC5 */
GPIO_InitStruct.Pin = GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pins : PA1 PA2 PA7 */
GPIO_InitStruct.Pin = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pins : LD1_Pin LD3_Pin */
GPIO_InitStruct.Pin = LD1_Pin | LD3_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pin : PB13 */
GPIO_InitStruct.Pin = GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pins : PG11 PG13 */
GPIO_InitStruct.Pin = GPIO_PIN_11 | GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
/*Configure GPIO pin : LD2_Pin */
GPIO_InitStruct.Pin = LD2_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
}
/**
Initializes the Global MSP.
*/
void HAL_MspInit(void)
{
/* USER CODE BEGIN MspInit 0 */
/* USER CODE END MspInit 0 */
__HAL_RCC_SYSCFG_CLK_ENABLE();
/* System interrupt init*/
/* USER CODE BEGIN MspInit 1 */
/* USER CODE END MspInit 1 */
}
/**
@brief I2C MSP Initialization
This function configures the hardware resources used in this example
@param hi2c: I2C handle pointer
@retval None
*/
void HAL_I2C_MspInit(I2C_HandleTypeDef* hi2c)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if (hi2c->Instance == I2C2)
{
/* USER CODE BEGIN I2C2_MspInit 0 */
/* USER CODE END I2C2_MspInit 0 */
__HAL_RCC_GPIOF_CLK_ENABLE();
/**I2C2 GPIO Configuration
PF0 ------> I2C2_SDA
PF1 ------> I2C2_SCL
*/
GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF4_I2C2;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/* Peripheral clock enable */
__HAL_RCC_I2C2_CLK_ENABLE();
/* USER CODE BEGIN I2C2_MspInit 1 */
/* USER CODE END I2C2_MspInit 1 */
}
}
/**
@brief I2S MSP Initialization
This function configures the hardware resources used in this example
@param hi2s: I2S handle pointer
@retval None
*/
void HAL_I2S_MspInit(I2S_HandleTypeDef* hi2s)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if (hi2s->Instance == SPI2)
{
/* USER CODE BEGIN SPI2_MspInit 0 */
/* USER CODE END SPI2_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_SPI2_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**I2S2 GPIO Configuration
PC2_C ------> I2S2_SDI
PC3_C ------> I2S2_SDO
PB10 ------> I2S2_CK
PB12 ------> I2S2_WS
PC6 ------> I2S2_MCK
*/
GPIO_InitStruct.Pin = GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_10 | GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* I2S2 DMA Init */
/* SPI2_RX Init */
hdma_spi2_rx.Instance = DMA2_Stream1;
hdma_spi2_rx.Init.Request = DMA_REQUEST_SPI2_RX;
hdma_spi2_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_spi2_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi2_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi2_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_spi2_rx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_spi2_rx.Init.Mode = DMA_CIRCULAR;
hdma_spi2_rx.Init.Priority = DMA_PRIORITY_LOW;
hdma_spi2_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_spi2_rx) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hi2s, hdmarx, hdma_spi2_rx);
/* SPI2_TX Init */
hdma_spi2_tx.Instance = DMA2_Stream0;
hdma_spi2_tx.Init.Request = DMA_REQUEST_SPI2_TX;
hdma_spi2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_spi2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi2_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_spi2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_spi2_tx.Init.Mode = DMA_CIRCULAR;
hdma_spi2_tx.Init.Priority = DMA_PRIORITY_LOW;
hdma_spi2_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_spi2_tx) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(hi2s, hdmatx, hdma_spi2_tx);
/* USER CODE BEGIN SPI2_MspInit 1 */
/* USER CODE END SPI2_MspInit 1 */
}
}
/**
@brief This function handles DMA2 stream0 global interrupt.
*/
void DMA2_Stream0_IRQHandler(void)
{
/* USER CODE BEGIN DMA2_Stream0_IRQn 0 */
/* USER CODE END DMA2_Stream0_IRQn 0 */
HAL_DMA_IRQHandler(&hdma_spi2_tx);
/* USER CODE BEGIN DMA2_Stream0_IRQn 1 */
/* USER CODE END DMA2_Stream0_IRQn 1 */
}
/**
@brief This function handles DMA2 stream1 global interrupt.
*/
void DMA2_Stream1_IRQHandler(void)
{
/* USER CODE BEGIN DMA2_Stream1_IRQn 0 */
/* USER CODE END DMA2_Stream1_IRQn 0 */
HAL_DMA_IRQHandler(&hdma_spi2_rx);
/* USER CODE BEGIN DMA2_Stream1_IRQn 1 */
/* USER CODE END DMA2_Stream1_IRQn 1 */
}
} /* extern "C" */
/* -------------------------------------------------------------------------------- */
#include <stdbool.h>
#include <stdint.h>
#define WM8731_I2C_ADDR 0x34
#define WM8731_REG_LLINEIN 0
#define WM8731_REG_RLINEIN 1
#define WM8731_REG_LHEADOUT 2
#define WM8731_REG_RHEADOUT 3
#define WM8731_REG_ANALOG 4
#define WM8731_REG_DIGITAL 5
#define WM8731_REG_POWERDOWN 6
#define WM8731_REG_INTERFACE 7
#define WM8731_REG_SAMPLING 8
#define WM8731_REG_ACTIVE 9
#define WM8731_REG_RESET 15
bool WM8731_init() {
/* I2S configuration */
delay(5);
WM8731_write(WM8731_REG_RESET, 0);
WM8731_write(WM8731_REG_INTERFACE, 0b00000010); // 0x02=0b00000010 // I2S, 16 bit, MCLK slave
WM8731_write(WM8731_REG_SAMPLING, 0b00100000); // 0x20=0b00100000 // 256*Fs, 44.1 kHz, MCLK/1
WM8731_write(WM8731_REG_DIGITAL, 0x08); // DAC soft mute
WM8731_write(WM8731_REG_ANALOG, 0x00); // disable all
WM8731_write(WM8731_REG_POWERDOWN, 0x00);
WM8731_write(WM8731_REG_LHEADOUT, 0x80);
WM8731_write(WM8731_REG_RHEADOUT, 0x80);
delay(5);
WM8731_write(WM8731_REG_ACTIVE, 1);
delay(5);
WM8731_write(WM8731_REG_DIGITAL, 0b00100); // DAC unmuted
WM8731_write(WM8731_REG_ANALOG, 0b00010000); // DAC selected
WM8731_volume(0.5);
return true;
}
bool WM8731_write(uint8_t reg, uint16_t val) {
/*
sub procedure WM8731_CMD(dim address as byte, dim cmd as word)
dim addr as byte
' B[15:9] Are Control Address Bits
' B[8:0] Are Control Data Bits
addr = address << 1 ' Shift left for one positions
addr = addr or (hi(cmd) and 1)
I2C2_Start() ' Start I2C2 module
I2C2_wm8731_write(WM8731_ADDRESS) ' Write Adress of WM8731 chip
I2C2_wm8731_write(addr) ' Write register address
I2C2_wm8731_write(lo(cmd)) ' Write command
I2C2_Stop() ' Stop I2C2 module
end sub
*/
const static uint8_t TRANSMIT_LENGTH = 2;
uint8_t data[TRANSMIT_LENGTH];
data[0] = (reg << 1) | ((val >> 8) & 1);
data[1] = val & 0xFF;
bool mResult = I2C_TX_write(WM8731_I2C_ADDR, data, TRANSMIT_LENGTH);
return mResult;
}
bool WM8731_volumeInteger(unsigned int n) {
// n = 127 for max volume (+6 dB)
// n = 48 for min volume (-73 dB)
// n = 0 to 47 for mute
if (n > 127)
n = 127;
WM8731_write(WM8731_REG_LHEADOUT, n | 0x180);
WM8731_write(WM8731_REG_RHEADOUT, n | 0x80);
return true;
}
bool WM8731_inputLevel(float n) {
// range is 0x00 (min) - 0x1F (max)
int _level = (int) (n * 31.f);
_level = _level > 0x1F ? 0x1F : _level;
WM8731_write(WM8731_REG_LLINEIN, _level);
WM8731_write(WM8731_REG_RLINEIN, _level);
return true;
}
bool WM8731_inputSelect(int n) {
if (n == AUDIO_INPUT_LINEIN) {
WM8731_write(WM8731_REG_ANALOG, 0x12);
} else if (n == AUDIO_INPUT_MIC) {
WM8731_write(WM8731_REG_ANALOG, 0x15);
} else {
return false;
}
return true;
}
bool WM8731_volume(float n) {
return WM8731_volumeInteger(n * 80.0 + 47.499);
}
