/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
WAVE_FormatTypeDef *waveformat = NULL;
/* STM32F3xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Initialize the LEDs */
BSP_LED_Init(LED1);
BSP_LED_Init(LED2);
BSP_LED_Init(LED3);
BSP_LED_Init(LED4);
/* Configure the system clock to 72 MHz */
SystemClock_Config();
/*##-1- Initialize the Keys Push buttons and LCD #####################*/
/* Initialize the Push buttons */
/* Key push button used for Pause/Resume */
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
/* Joystick UP push button used for Volume High */
BSP_PB_Init(BUTTON_DOWN, BUTTON_MODE_GPIO);
/* Joystick DOWN push button used for Volume Low */
BSP_PB_Init(BUTTON_UP, BUTTON_MODE_GPIO);
/* Initialize the LCD */
BSP_LCD_Init();
/*##-2- Display welcome messages on LCD ####################################*/
Display_ExampleDescription();
/* Wait for Key push-button press before starting the Example */
while (BSP_PB_GetState(BUTTON_KEY) != GPIO_PIN_RESET)
{
}
/* Wait for Key push-button release before starting the Example */
while (BSP_PB_GetState(BUTTON_KEY) != GPIO_PIN_SET)
{
}
/*##-3- Display Example Template ###########################################*/
AudioPlay_SetHint();
/*##-4- Turn on LEDs available on STM32303E-EVAL RevC Eval board ###################*/
BSP_LED_On(LED1);
BSP_LED_On(LED2);
BSP_LED_On(LED3);
BSP_LED_On(LED4);
/* Initialize the Audio codec and all related peripherals (I2S, I2C, IOs...) */
if (BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_AUTO, uwVolume, I2S_AUDIOFREQ_8K) != AUDIO_OK)
{
/* Initialization Error */
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"Initialization problem", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Verify that jumper JP5 and JP6", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"are well set to I2C2 position", CENTER_MODE);
Error_Handler();
}
else
{
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(20, 100, (uint8_t *)"Audio Codec Ready", LEFT_MODE);
}
/*##-5- Display information related to control and Playback state #*/
/* Retrieve Wave Sample rate*/
waveformat = (WAVE_FormatTypeDef*)AUDIO_FILE_ADDRESS;
AudioPlay_DisplayInfos(waveformat);
/*##-6- Start AUDIO playback #####################################*/
/*
Normal mode description:
Start playing the audio file (using DMA).
Using this mode, the application can run other tasks in parallel since
the DMA is handling the Audio Transfer instead of the CPU.
The only task remaining for the CPU will be the management of the DMA
Transfer Complete interrupt or the Half Transfer Complete interrupt in
order to load again the buffer and to calculate the remaining data.
Circular mode description:
Start playing the file from a circular buffer, once the DMA is enabled it
always run. User has to fill periodically the buffer with the audio data
using Transfer complete and/or half transfer complete interrupts callbacks
(EVAL_AUDIO_TransferComplete_CallBack() or EVAL_AUDIO_HalfTransfer_CallBack()...
In this case the audio data file is smaller than the DMA max buffer
size 65535 so there is no need to load buffer continuously or manage the
transfer complete or Half transfer interrupts callbacks. */
/* Set the total number of data to be played (count in half-word) */
AudioTotalSize = (AUDIO_FILE_SIZE - AUDIO_START_OFFSET_ADDRESS)/(waveformat->NbrChannels);
/* Set the current audio pointer position */
CurrentPos = (uint16_t*)(AUDIO_FILE_ADDRESS + AUDIO_START_OFFSET_ADDRESS);
/* Start the audio player */
BSP_AUDIO_OUT_Play((uint16_t*)CurrentPos, (uint32_t)(AUDIO_FILE_SIZE - AUDIO_START_OFFSET_ADDRESS));
/* Update the remaining number of data to be played */
AudioRemSize = AudioTotalSize - DMA_MAX(AudioTotalSize);
/* Update the current audio pointer position */
CurrentPos += DMA_MAX(AudioTotalSize);
/* Display the state on the screen */
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_DisplayStringAt(0, 160, (uint8_t *)"Playback on-going", CENTER_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
/* Infinite loop */
while (1)
{
/* Check on the Pause/Resume button */
if (BSP_PB_GetState(BUTTON_KEY) == GPIO_PIN_RESET)
{
/* Wait to avoid rebound */
while (BSP_PB_GetState(BUTTON_KEY) == GPIO_PIN_RESET);
if (uwCommand == AUDIO_PAUSE)
{
BSP_AUDIO_OUT_Pause();
/* Display the current state of the player */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DisplayStringAt(0, 160, (uint8_t *)"Playback paused ", CENTER_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
/* Next time Resume command should be processed */
uwCommand = AUDIO_RESUME;
}
else
{
BSP_AUDIO_OUT_Resume();
/* Display the current state of the player */
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_DisplayStringAt(0, 160, (uint8_t *)"Playback on-going", CENTER_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
/* Next time Pause command should be processed */
uwCommand = AUDIO_PAUSE;
}
}
/* Check on the Volume Low button */
if (BSP_PB_GetState(BUTTON_DOWN) == GPIO_PIN_SET)
{
/* Wait to avoid rebound */
while (BSP_PB_GetState(BUTTON_DOWN) == GPIO_PIN_SET);
/* Decrease volume by 5% */
if (uwVolume > 5)
{
uwVolume -= 5;
}
else
{
uwVolume = 0;
}
/* Apply the new volume to the codec */
BSP_AUDIO_OUT_SetVolume(uwVolume);
sprintf((char *) Volume_string, " Volume : %lu%% ", uwVolume);
BSP_LCD_DisplayStringAt((uint16_t)(-6), BSP_LCD_GetYSize()-60, Volume_string, RIGHT_MODE);
}
/* Check on the Volume High button */
if (BSP_PB_GetState(BUTTON_UP) == GPIO_PIN_SET)
{
/* Wait to avoid rebound */
while (BSP_PB_GetState(BUTTON_UP) == GPIO_PIN_SET);
/* Increase volume by 5% */
if (uwVolume < 95)
{
uwVolume += 5;
}
else
{
uwVolume = 100;
}
/* Apply the new volume to the codec */
BSP_AUDIO_OUT_SetVolume(uwVolume);
sprintf((char *) Volume_string, " Volume : %lu%% ", uwVolume);
BSP_LCD_DisplayStringAt((uint16_t)(-6), BSP_LCD_GetYSize()-60, Volume_string, RIGHT_MODE);
}
/* Toggle LED3 */
BSP_LED_Toggle(LED3);
/* Insert 100 ms delay */
HAL_Delay(100);
/* Toggle LED2 */
BSP_LED_Toggle(LED2);
/* Insert 100 ms delay */
HAL_Delay(100);
}
}
/**
* @brief Test Audio Hardware.
* The main objective of this test is to check the hardware connection of the
* Audio peripheral.
* @param None
* @retval None
*/
void AudioPlay_demo(void)
{
WAVE_FormatTypeDef *waveformat = NULL;
uint8_t Volume_string[20] = {0};
AudioPlay_SetHint();
/* Configuration of the EXTI for the joystick SEL push button for pause/resume */
/* UP/DOWN push buttons for change the volume */
BSP_PB_Init(BUTTON_SEL, BUTTON_MODE_EXTI);
BSP_PB_Init(BUTTON_UP, BUTTON_MODE_EXTI);
BSP_PB_Init(BUTTON_DOWN, BUTTON_MODE_EXTI);
/* Retrieve Wave Sample rate*/
waveformat = (WAVE_FormatTypeDef*) AUDIO_FILE_ADDRESS;
AudioPlay_DisplayInfos(waveformat);
/* Initialize Audio Device */
if(BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_HEADPHONE, volume, waveformat->SampleRate) != 0)
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Initialization problem", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"Audio Codec not detected", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 160, (uint8_t*)"Verify that jumper JP4 and JP5", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 175, (uint8_t*)"are well set to I2C2 position", CENTER_MODE);
Error_Handler();
}
/* Set the total number of data to be played */
AudioTotalSize = (AUDIO_FILE_SIZE / AUDIODATA_SIZE);
/* Set the current audio pointer position */
CurrentPos = (uint16_t *)(AUDIO_FILE_ADDRESS);
/* Start the audio player */
if(BSP_AUDIO_OUT_Play(CurrentPos,DMA_MAX((AudioTotalSize))) != 0)
{
Error_Handler();
}
/* Turn ON LED green: start of Audio file play */
BSP_LED_On(LED_GREEN);
/* Update the remaining number of data to be played */
AudioRemSize = AudioTotalSize - DMA_MAX(AudioTotalSize);
/* Update the current audio pointer position */
CurrentPos += DMA_MAX(AudioTotalSize);
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback on-going", LEFT_MODE);
sprintf((char *) Volume_string, " Volume : %d%% ", volume);
BSP_LCD_DisplayStringAt((uint16_t)(-20), BSP_LCD_GetYSize()-30, Volume_string, RIGHT_MODE);
/* Infinite loop */
while(!CheckForUserInput())
{
if (PauseResumeStatus == PAUSE_STATUS)
{
/* Turn ON LED orange: Audio play in pause */
BSP_LED_On(LED_ORANGE);
/* Pause playing */
if(BSP_AUDIO_OUT_Pause() != 0)
{
Error_Handler();
}
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback paused ", LEFT_MODE);
PauseResumeStatus = IDLE_STATUS;
}
else if (PauseResumeStatus == RESUME_STATUS)
{
/* Turn OFF LED orange: Audio play running */
BSP_LED_Off(LED_ORANGE);
/* Resume playing */
if(BSP_AUDIO_OUT_Resume() != 0)
{
Error_Handler();
}
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback on-going", LEFT_MODE);
PauseResumeStatus = IDLE_STATUS;
}
if (VolumeChange != 0)
{
VolumeChange = 0;
if(BSP_AUDIO_OUT_SetVolume(volume) != 0)
{
Error_Handler();
}
sprintf((char *) Volume_string, " Volume : %d%% ", volume);
BSP_LCD_DisplayStringAt((uint16_t)(-20), BSP_LCD_GetYSize()-30, Volume_string, RIGHT_MODE);
}
}
/* Reset the EXTI configuration for Joystick SEL, UP and DOWN push buttons */
/* Configuration of the joystick in GPIO mode and no more EXTI */
BSP_PB_Init(BUTTON_SEL, BUTTON_MODE_GPIO);
BSP_PB_Init(BUTTON_UP, BUTTON_MODE_GPIO);
BSP_PB_Init(BUTTON_DOWN, BUTTON_MODE_GPIO);
/* Stop Player before close Test */
if (BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW) != AUDIO_OK)
{
/* Audio Stop error */
Error_Handler();
}
else
{
/* Turn OFF LED green: stop of Audio file play */
BSP_LED_Off(LED_GREEN);
BSP_LED_Off(LED_ORANGE);
}
}
/**
* @brief Test Audio Hardware.
* The main objective of this test is to check the hardware connection of the
* Audio peripheral.
* @param None
* @retval None
*/
void AudioPlay_demo(void)
{
WAVE_FormatTypeDef *waveformat = NULL;
uint8_t Volume_string[20] = {0};
AudioPlay_SetHint();
/* Configuration of the EXTI for the joystick SEL push button for pause/resume */
/* UP/DOWN push buttons for change the volume */
BSP_JOY_Init(JOY_MODE_EXTI);
/* Retrieve Wave Sample rate */
waveformat = (WAVE_FormatTypeDef*) AUDIO_FILE_ADDRESS;
/* Check waveformat validity */
/* In case of audio file pre-loaded into Flash memory, to check audio data */
/* integrity. */
if ((waveformat->SampleRate < SAMPLE_RATE_MIN) || (waveformat->SampleRate > SAMPLE_RATE_MAX))
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Audio file not valid", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"Check audio data integrity", CENTER_MODE);
Error_Handler();
}
/* Display audio file Wave parameters */
AudioPlay_DisplayInfos(waveformat);
/* Initialize Audio Device */
if(BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_BOTH, volume, waveformat->SampleRate) != 0)
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Initialization problem", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"Audio Codec not detected", CENTER_MODE);
Error_Handler();
}
/* Set the total number of data to be played */
AudioTotalSize = (AUDIO_FILE_SIZE - AUDIO_START_ADDRESS) / 2;
/* Set the current audio pointer position */
CurrentPos = (uint16_t *)(AUDIO_FILE_ADDRESS);
/* Initialize Volume */
if(BSP_AUDIO_OUT_SetVolume(volume) != 0)
{
Error_Handler();
}
/* Start the audio player */
if(BSP_AUDIO_OUT_Play(CurrentPos, DMA_MAX(AudioTotalSize)) != 0)
{
Error_Handler();
}
/* Turn ON LED green: start of Audio file play */
BSP_LED_On(LED_GREEN);
/* Update the remaining number of data to be played */
AudioRemSize = AudioTotalSize - DMA_MAX(AudioTotalSize);
/* Update the current audio pointer position */
CurrentPos += DMA_MAX(AudioTotalSize);
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback on-going", LEFT_MODE);
sprintf((char *) Volume_string, " Volume : %d%% ", volume);
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, Volume_string, RIGHT_MODE);
/* Infinite loop */
while(!CheckForUserInput())
{
if (PauseResumeStatus == PAUSE_STATUS)
{
/* Turn ON LED orange: Audio play in pause */
BSP_LED_On(LED_ORANGE);
/* Pause playing */
if(BSP_AUDIO_OUT_Pause() != 0)
{
Error_Handler();
}
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback paused ", LEFT_MODE);
PauseResumeStatus = IDLE_STATUS;
}
else if (PauseResumeStatus == RESUME_STATUS)
{
/* Turn OFF LED orange: Audio play running */
BSP_LED_Off(LED_ORANGE);
/* Resume playing */
if(BSP_AUDIO_OUT_Resume() != 0)
{
Error_Handler();
}
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback on-going", LEFT_MODE);
PauseResumeStatus = IDLE_STATUS;
}
if (VolumeChange != 0)
{
VolumeChange = 0;
if(BSP_AUDIO_OUT_SetVolume(volume) != 0)
{
Error_Handler();
}
sprintf((char *) Volume_string, " Volume : %d%% ", volume);
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, Volume_string, RIGHT_MODE);
}
if (UserOutputMode != UserOutputModePreviousState)
{
/* Change audio output */
BSP_AUDIO_OUT_SetOutputMode(UserOutputMode);
UserOutputModePreviousState = UserOutputMode;
}
}
/* Reset the EXTI configuration for Joystick SEL, UP and DOWN push buttons */
/* Configuration of the joystick in GPIO mode and no more EXTI */
BSP_PB_Init(BUTTON_SEL, BUTTON_MODE_GPIO);
BSP_PB_Init(BUTTON_UP, BUTTON_MODE_GPIO);
BSP_PB_Init(BUTTON_DOWN, BUTTON_MODE_GPIO);
/* Stop Player before close Test */
if (BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW) != AUDIO_OK)
{
/* Audio Stop error */
Error_Handler();
}
else
{
/* Turn OFF LED green: stop of Audio file play */
BSP_LED_Off(LED_GREEN);
BSP_LED_Off(LED_ORANGE);
}
}
