/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2025 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "crc.h"
#include "dma.h"
#include "fatfs.h"
#include "i2s.h"
#include "sdio.h"
#include "spi.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <ctype.h>
#include <stdbool.h>
#include <stdarg.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include "audio.h"
#include "st7789.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
typedef enum
{
AUDIO_PLAYBACK_STATE_IDLE = 0,
AUDIO_PLAYBACK_STATE_RUNNING,
AUDIO_PLAYBACK_STATE_DONE,
AUDIO_PLAYBACK_STATE_ERROR
} audio_playback_state_t;
typedef struct
{
uint32_t next_index;
uint32_t samples_remaining;
audio_playback_state_t state;
} audio_playback_ctrl_t;
typedef enum
{
AUDIO_SD_STATE_IDLE = 0,
AUDIO_SD_STATE_PLAYING,
AUDIO_SD_STATE_DONE,
AUDIO_SD_STATE_ERROR
} audio_sd_state_t;
typedef struct
{
FIL file;
UINT half_bytes;
UINT frame_bytes;
UINT bytes_next;
uint8_t *buf0;
uint8_t *buf1;
uint8_t *read_buf;
uint8_t mounted;
uint8_t file_opened;
audio_sd_state_t state;
FRESULT last_res;
HAL_StatusTypeDef last_hal;
} audio_sd_playback_t;
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#ifndef _USE_MKFS
#define _USE_MKFS 1
#endif
#if (_USE_MKFS == 1)
#define FATFS_MKFS_BUFFER_SIZE 4096U
#endif
#define FATFS_SPEED_TEST_BUFFER_SIZE 4096U
#define AUDIO_DMA_MAX_TRANSFER_SAMPLES 65535U
#define AUDIO_FILE_DIRECTORY "audio"
#define AUDIO_FILE_NAME "audio.bin"
#define AUDIO_FILE_PATH_MAX 64U
#define AUDIO_STREAM_BUFFER_BYTES 5120U
#define AUDIO_VOLUME_PERCENT 100U /* 0-100%，用于数字音量缩放 */
#define AUDIO_VOLUME_BUFFER_SAMPLES 2048U /* 内置音轨播放时的临时缓冲区大小（采样数） */
#define SPECTRUM_BIN_COUNT 40U
#define SPECTRUM_WINDOW_FRAMES 256U
#define SPECTRUM_DRAW_INTERVAL_MS 40U
#define SPECTRUM_MAX_HEIGHT (ST7789_HIGHT - 10U)
#define SPECTRUM_BAR_GAP 2U
#define SPECTRUM_SMOOTH_ALPHA 0.30f
#define SPECTRUM_DECAY_ALPHA 0.90f
#define SPECTRUM_PEAK_INIT 2000.0f
#ifndef M_PI
#define M_PI 3.1415926f
#endif
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
static volatile audio_playback_ctrl_t audio_ctrl = {0};
static uint16_t audio_sd_buffer[AUDIO_STREAM_BUFFER_BYTES / sizeof(uint16_t)];
static audio_sd_playback_t audio_sd_ctx = {0};
static volatile uint8_t audio_stream_from_sd = 0U;
static volatile uint8_t audio_sd_dma_done = 0U;
static uint16_t audio_volume_q15 = 0U;
static int16_t audio_volume_buffer[AUDIO_VOLUME_BUFFER_SAMPLES];
static float spectrum_coeff[SPECTRUM_BIN_COUNT];
static float spectrum_smooth[SPECTRUM_BIN_COUNT];
static uint16_t spectrum_levels[SPECTRUM_BIN_COUNT];
static uint16_t spectrum_draw_levels[SPECTRUM_BIN_COUNT];
static float spectrum_peak_avg = SPECTRUM_PEAK_INIT;
static uint32_t spectrum_last_draw_ms = 0U;
typedef struct
{
float pos;
uint16_t color;
} spectrum_stop_t;
static const spectrum_stop_t spectrum_gradient[] = {
{0.0f, BLUE},
{0.25f, CYAN},
{0.50f, GREEN},
{0.75f, YELLOW},
{1.0f, RED}
};
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
static void FATFS_SpeedTest(uint32_t kilobytes);
static HAL_StatusTypeDef Audio_StartNextChunk(void);
static void Audio_BeginPlayback(void);
static void Audio_SD_StopAndCleanup(void);
static FRESULT Audio_SD_StartPlayback(const char *directory,
const char *file_name,
uint8_t *work_buffer,
UINT work_buffer_bytes);
static void Audio_SD_ProcessPlayback(void);
static void Spectrum_Init(void);
static void Spectrum_UpdateFromBuffer(const int16_t *samples, size_t sample_count);
static void Spectrum_DrawIfDue(void);
static uint16_t Spectrum_LerpColor(uint16_t c0, uint16_t c1, float t);
static uint16_t Spectrum_ColorForBin(uint32_t index);
static uint16_t Audio_ComputeVolumeQ15(void);
static int16_t Audio_ApplyVolumeToSample(int16_t sample, uint16_t gain_q15);
static void Audio_ApplyVolumeToBuffer(int16_t *buffer, size_t samples, uint16_t gain_q15);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
static uint16_t Audio_ComputeVolumeQ15(void)
{
uint32_t percent = AUDIO_VOLUME_PERCENT;
if (percent > 100U)
{
percent = 100U;
}
return (uint16_t)(((percent * 32767U) + 50U) / 100U);
}
static int16_t Audio_ApplyVolumeToSample(int16_t sample, uint16_t gain_q15)
{
int32_t scaled = (int32_t)sample * (int32_t)gain_q15;
scaled += (1 << 14); /* 四舍五入 */
scaled >>= 15;
if (scaled > 32767)
{
scaled = 32767;
}
else if (scaled < -32768)
{
scaled = -32768;
}
return (int16_t)scaled;
}
static void Audio_ApplyVolumeToBuffer(int16_t *buffer, size_t samples, uint16_t gain_q15)
{
if ((buffer == NULL) || (samples == 0U))
{
return;
}
if (gain_q15 == 0U)
{
memset(buffer, 0, samples * sizeof(int16_t));
return;
}
if (gain_q15 >= 32767U)
{
return; /* 100% 音量，无需处理 */
}
for (size_t i = 0U; i < samples; ++i)
{
buffer[i] = Audio_ApplyVolumeToSample(buffer[i], gain_q15);
}
}
static HAL_StatusTypeDef Audio_StartNextChunk(void)
{
if (audio_ctrl.samples_remaining == 0U)
{
audio_ctrl.state = AUDIO_PLAYBACK_STATE_DONE;
return HAL_OK;
}
uint32_t chunk_limit = (AUDIO_VOLUME_BUFFER_SAMPLES < AUDIO_DMA_MAX_TRANSFER_SAMPLES) ?
AUDIO_VOLUME_BUFFER_SAMPLES :
AUDIO_DMA_MAX_TRANSFER_SAMPLES;
uint32_t chunk = (audio_ctrl.samples_remaining > chunk_limit) ?
chunk_limit :
audio_ctrl.samples_remaining;
const int16_t *chunk_ptr = (const int16_t *)&audio_track[audio_ctrl.next_index];
memcpy(audio_volume_buffer, chunk_ptr, chunk * sizeof(int16_t));
Audio_ApplyVolumeToBuffer(audio_volume_buffer, chunk, audio_volume_q15);
HAL_StatusTypeDef status = HAL_I2S_Transmit_DMA(&hi2s2,
(uint16_t *)audio_volume_buffer,
(uint16_t)chunk);
if (status == HAL_OK)
{
audio_ctrl.next_index += chunk;
audio_ctrl.samples_remaining -= chunk;
audio_ctrl.state = AUDIO_PLAYBACK_STATE_RUNNING;
}
return status;
}
static void Audio_BeginPlayback(void)
{
audio_volume_q15 = Audio_ComputeVolumeQ15();
audio_ctrl.next_index = 0U;
audio_ctrl.samples_remaining = (uint32_t)AUDIO_TRACK_SAMPLE_COUNT;
audio_ctrl.state = AUDIO_PLAYBACK_STATE_IDLE;
if (audio_ctrl.samples_remaining == 0U)
{
audio_ctrl.state = AUDIO_PLAYBACK_STATE_DONE;
return;
}
if (Audio_StartNextChunk() != HAL_OK)
{
audio_ctrl.state = AUDIO_PLAYBACK_STATE_ERROR;
Error_Handler();
}
}
static void Audio_SD_StopAndCleanup(void)
{
if (audio_sd_ctx.file_opened)
{
f_close(&audio_sd_ctx.file);
audio_sd_ctx.file_opened = 0U;
}
if (audio_sd_ctx.mounted)
{
f_mount(NULL, (TCHAR const*)SDPath, 0);
audio_sd_ctx.mounted = 0U;
}
audio_stream_from_sd = 0U;
}
static FRESULT Audio_SD_StartPlayback(const char *directory,
const char *file_name,
uint8_t *work_buffer,
UINT work_buffer_bytes)
{
audio_volume_q15 = Audio_ComputeVolumeQ15();
const UINT frame_bytes = (UINT)(AUDIO_NUM_CHANNELS * sizeof(int16_t));
if ((work_buffer == NULL) ||
(work_buffer_bytes < (2U * frame_bytes)) ||
((work_buffer_bytes % frame_bytes) != 0U))
{
return FR_INVALID_PARAMETER;
}
if (audio_sd_ctx.state == AUDIO_SD_STATE_PLAYING)
{
return FR_LOCKED;
}
Audio_SD_StopAndCleanup();
memset(&audio_sd_ctx, 0, sizeof(audio_sd_ctx));
UINT half_bytes = work_buffer_bytes / 2U;
const UINT max_bytes = AUDIO_DMA_MAX_TRANSFER_SAMPLES * sizeof(uint16_t);
if (half_bytes > max_bytes)
{
half_bytes = max_bytes;
}
const UINT align = (512U > frame_bytes) ? 512U : frame_bytes;
half_bytes -= (half_bytes % align);
if (half_bytes == 0U)
{
return FR_INVALID_PARAMETER;
}
audio_sd_ctx.buf0 = work_buffer;
audio_sd_ctx.buf1 = work_buffer + half_bytes;
audio_sd_ctx.read_buf = audio_sd_ctx.buf1;
audio_sd_ctx.half_bytes = half_bytes;
audio_sd_ctx.frame_bytes = frame_bytes;
audio_sd_ctx.state = AUDIO_SD_STATE_IDLE;
char file_path[AUDIO_FILE_PATH_MAX];
int written = ((directory != NULL) && (directory[0] != '\0')) ?
snprintf(file_path, sizeof(file_path), "%s/%s", directory, file_name) :
snprintf(file_path, sizeof(file_path), "%s", file_name);
if ((written <= 0) || ((size_t)written >= sizeof(file_path)))
{
return FR_INVALID_NAME;
}
FRESULT res = f_mount(&SDFatFS, (TCHAR const*)SDPath, 1);
if (res != FR_OK)
{
printf("audio(fs): mount failed (%d)\r\n", (int)res);
audio_sd_ctx.last_res = res;
audio_sd_ctx.state = AUDIO_SD_STATE_ERROR;
return res;
}
audio_sd_ctx.mounted = 1U;
res = f_open(&audio_sd_ctx.file, file_path, FA_READ);
if (res != FR_OK)
{
printf("audio(fs): open %s failed (%d)\r\n", file_path, (int)res);
audio_sd_ctx.last_res = res;
audio_sd_ctx.state = AUDIO_SD_STATE_ERROR;
Audio_SD_StopAndCleanup();
return res;
}
audio_sd_ctx.file_opened = 1U;
UINT bytes0 = 0U;
UINT bytes1 = 0U;
res = f_read(&audio_sd_ctx.file, audio_sd_ctx.buf0, half_bytes, &bytes0);
if (res != FR_OK)
{
printf("audio(fs): first read failed (%d)\r\n", (int)res);
audio_sd_ctx.last_res = res;
audio_sd_ctx.state = AUDIO_SD_STATE_ERROR;
Audio_SD_StopAndCleanup();
return res;
}
bytes0 -= (bytes0 % frame_bytes);
if (bytes0 > 0U)
{
Audio_ApplyVolumeToBuffer((int16_t *)audio_sd_ctx.buf0,
bytes0 / sizeof(int16_t),
audio_volume_q15);
}
if (bytes0 == 0U)
{
printf("audio(fs): file empty\r\n");
audio_sd_ctx.state = AUDIO_SD_STATE_DONE;
Audio_SD_StopAndCleanup();
return FR_OK;
}
res = f_read(&audio_sd_ctx.file, audio_sd_ctx.buf1, half_bytes, &bytes1);
if (res != FR_OK)
{
printf("audio(fs): second read failed (%d)\r\n", (int)res);
audio_sd_ctx.last_res = res;
audio_sd_ctx.state = AUDIO_SD_STATE_ERROR;
Audio_SD_StopAndCleanup();
return res;
}
bytes1 -= (bytes1 % frame_bytes);
if (bytes1 > 0U)
{
Audio_ApplyVolumeToBuffer((int16_t *)audio_sd_ctx.buf1,
bytes1 / sizeof(int16_t),
audio_volume_q15);
}
audio_sd_ctx.bytes_next = bytes1;
audio_stream_from_sd = 1U;
audio_sd_dma_done = 0U;
HAL_StatusTypeDef hal = HAL_I2S_Transmit_DMA(&hi2s2,
(uint16_t *)audio_sd_ctx.buf0,
(uint16_t)(bytes0 / sizeof(uint16_t)));
if (hal != HAL_OK)
{
printf("audio(fs): start DMA failed (%ld)\r\n", (long)hal);
audio_sd_ctx.last_res = FR_INT_ERR;
audio_sd_ctx.last_hal = hal;
audio_sd_ctx.state = AUDIO_SD_STATE_ERROR;
Audio_SD_StopAndCleanup();
return FR_INT_ERR;
}
Spectrum_UpdateFromBuffer((const int16_t *)audio_sd_ctx.buf0,
bytes0 / sizeof(uint16_t));
audio_sd_ctx.state = AUDIO_SD_STATE_PLAYING;
return FR_OK;
}
static void Audio_SD_ProcessPlayback(void)
{
if (audio_sd_ctx.state != AUDIO_SD_STATE_PLAYING)
{
return;
}
if (audio_sd_dma_done == 0U)
{
return;
}
audio_sd_dma_done = 0U;
if (audio_sd_ctx.bytes_next == 0U)
{
HAL_I2S_DMAStop(&hi2s2);
audio_sd_ctx.state = AUDIO_SD_STATE_DONE;
Audio_SD_StopAndCleanup();
return;
}
uint8_t *play_buf = audio_sd_ctx.read_buf;
UINT play_bytes = audio_sd_ctx.bytes_next;
audio_sd_ctx.read_buf = (play_buf == audio_sd_ctx.buf0) ? audio_sd_ctx.buf1 : audio_sd_ctx.buf0;
HAL_StatusTypeDef hal = HAL_I2S_Transmit_DMA(&hi2s2,
(uint16_t *)play_buf,
(uint16_t)(play_bytes / sizeof(uint16_t)));
if (hal != HAL_OK)
{
printf("audio(fs): DMA start failed (%ld)\r\n", (long)hal);
audio_sd_ctx.last_res = FR_INT_ERR;
audio_sd_ctx.last_hal = hal;
audio_sd_ctx.state = AUDIO_SD_STATE_ERROR;
Audio_SD_StopAndCleanup();
return;
}
Spectrum_UpdateFromBuffer((const int16_t *)play_buf, play_bytes / sizeof(uint16_t));
UINT bytes_read = 0U;
FRESULT res = f_read(&audio_sd_ctx.file, audio_sd_ctx.read_buf, audio_sd_ctx.half_bytes, &bytes_read);
if (res != FR_OK)
{
printf("audio(fs): read failed (%d)\r\n", (int)res);
audio_sd_ctx.last_res = res;
audio_sd_ctx.state = AUDIO_SD_STATE_ERROR;
Audio_SD_StopAndCleanup();
HAL_I2S_DMAStop(&hi2s2);
return;
}
bytes_read -= (bytes_read % audio_sd_ctx.frame_bytes);
if (bytes_read > 0U)
{
Audio_ApplyVolumeToBuffer((int16_t *)audio_sd_ctx.read_buf,
bytes_read / sizeof(int16_t),
audio_volume_q15);
}
audio_sd_ctx.bytes_next = bytes_read;
}
static void Spectrum_Init(void)
{
const float bin_width_hz = ((float)AUDIO_SAMPLE_RATE_HZ * 0.5f) / (float)SPECTRUM_BIN_COUNT;
for (uint32_t i = 0U; i < SPECTRUM_BIN_COUNT; ++i)
{
float freq = bin_width_hz * (float)(i + 1U);
float omega = 2.0f * (float)M_PI * freq / (float)AUDIO_SAMPLE_RATE_HZ;
spectrum_coeff[i] = 2.0f * cosf(omega);
spectrum_smooth[i] = 0.0f;
spectrum_levels[i] = 0U;
spectrum_draw_levels[i] = 0U;
}
spectrum_peak_avg = SPECTRUM_PEAK_INIT;
spectrum_last_draw_ms = HAL_GetTick();
}
static void Spectrum_UpdateFromBuffer(const int16_t *samples, size_t sample_count)
{
if ((samples == NULL) || (sample_count < AUDIO_NUM_CHANNELS))
{
return;
}
size_t frames = sample_count / AUDIO_NUM_CHANNELS;
size_t window = (frames < (size_t)SPECTRUM_WINDOW_FRAMES) ? frames : (size_t)SPECTRUM_WINDOW_FRAMES;
if (window < 8U)
{
return;
}
for (uint32_t bin = 0U; bin < SPECTRUM_BIN_COUNT; ++bin)
{
float coeff = spectrum_coeff[bin];
float q0 = 0.0f;
float q1 = 0.0f;
float q2 = 0.0f;
for (size_t n = 0U; n < window; ++n)
{
float x = (float)samples[n * AUDIO_NUM_CHANNELS];
q0 = (coeff * q1) - q2 + x;
q2 = q1;
q1 = q0;
}
float power = (q1 * q1) + (q2 * q2) - (coeff * q1 * q2);
if (power < 0.0f)
{
power = 0.0f;
}
float mag = sqrtf(power) / (float)window;
spectrum_peak_avg = (SPECTRUM_DECAY_ALPHA * spectrum_peak_avg) +
((1.0f - SPECTRUM_DECAY_ALPHA) * mag);
float scaled = (mag * (float)SPECTRUM_MAX_HEIGHT) / (spectrum_peak_avg + 1.0f);
if (scaled < 0.0f)
{
scaled = 0.0f;
}
if (scaled > (float)SPECTRUM_MAX_HEIGHT)
{
scaled = (float)SPECTRUM_MAX_HEIGHT;
}
float smooth = (1.0f - SPECTRUM_SMOOTH_ALPHA) * spectrum_smooth[bin] +
(SPECTRUM_SMOOTH_ALPHA * scaled);
spectrum_smooth[bin] = smooth;
spectrum_levels[bin] = (uint16_t)smooth;
}
}
static void Spectrum_DrawIfDue(void)
{
uint32_t now = HAL_GetTick();
if ((now - spectrum_last_draw_ms) < SPECTRUM_DRAW_INTERVAL_MS)
{
return;
}
spectrum_last_draw_ms = now;
const uint16_t bar_width = ST7789_WIDTH / SPECTRUM_BIN_COUNT;
uint16_t usable_width = (bar_width > SPECTRUM_BAR_GAP) ? (bar_width - SPECTRUM_BAR_GAP) : bar_width;
if (usable_width == 0U)
{
usable_width = 1U;
}
const uint16_t y_base = ST7789_HIGHT - 1U;
for (uint32_t i = 0U; i < SPECTRUM_BIN_COUNT; ++i)
{
uint16_t h = spectrum_levels[i];
uint16_t x0 = (uint16_t)(i * bar_width);
x0 = (uint16_t)(x0 + ((bar_width - usable_width) / 2U));
uint16_t x1 = x0 + usable_width - 1U;
if (x1 >= ST7789_WIDTH)
{
x1 = ST7789_WIDTH - 1U;
}
/* Clear column then draw new bar */
ST7789_FillRect(x0, 0U, x1, y_base, BLACK);
if (h > 0U)
{
uint16_t y0 = (h >= ST7789_HIGHT) ? 0U : (uint16_t)(ST7789_HIGHT - h);
uint16_t color = Spectrum_ColorForBin(i);
ST7789_FillRect(x0, y0, x1, y_base, color);
}
spectrum_draw_levels[i] = h;
}
}
static uint16_t Spectrum_LerpColor(uint16_t c0, uint16_t c1, float t)
{
if (t < 0.0f) t = 0.0f;
if (t > 1.0f) t = 1.0f;
float r0 = (float)((c0 >> 11) & 0x1FU);
float g0 = (float)((c0 >> 5) & 0x3FU);
float b0 = (float)(c0 & 0x1FU);
float r1 = (float)((c1 >> 11) & 0x1FU);
float g1 = (float)((c1 >> 5) & 0x3FU);
float b1 = (float)(c1 & 0x1FU);
float r = r0 + (r1 - r0) * t;
float g = g0 + (g1 - g0) * t;
float b = b0 + (b1 - b0) * t;
uint16_t ri = (uint16_t)(r + 0.5f);
uint16_t gi = (uint16_t)(g + 0.5f);
uint16_t bi = (uint16_t)(b + 0.5f);
if (ri > 0x1F) ri = 0x1F;
if (gi > 0x3F) gi = 0x3F;
if (bi > 0x1F) bi = 0x1F;
return (uint16_t)((ri << 11) | (gi << 5) | bi);
}
static uint16_t Spectrum_ColorForBin(uint32_t index)
{
const size_t stop_count = sizeof(spectrum_gradient) / sizeof(spectrum_gradient[0]);
if (stop_count == 0U)
{
return WHITE;
}
float t = (SPECTRUM_BIN_COUNT > 1U) ?
((float)index / (float)(SPECTRUM_BIN_COUNT - 1U)) : 0.0f;
if (t <= spectrum_gradient[0].pos)
{
return spectrum_gradient[0].color;
}
if (t >= spectrum_gradient[stop_count - 1U].pos)
{
return spectrum_gradient[stop_count - 1U].color;
}
for (size_t i = 0U; i < (stop_count - 1U); ++i)
{
float p0 = spectrum_gradient[i].pos;
float p1 = spectrum_gradient[i + 1U].pos;
if ((t >= p0) && (t <= p1))
{
float local_t = (p1 > p0) ? ((t - p0) / (p1 - p0)) : 0.0f;
return Spectrum_LerpColor(spectrum_gradient[i].color,
spectrum_gradient[i + 1U].color,
local_t);
}
}
return spectrum_gradient[stop_count - 1U].color;
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_USART2_UART_Init();
MX_SPI1_Init();
MX_SDIO_SD_Init();
MX_FATFS_Init();
MX_CRC_Init();
MX_I2S2_Init();
/* USER CODE BEGIN 2 */
HAL_Delay(200);
ST7789_Init();
ST7789_Clear(BLACK);
Spectrum_Init();
const uint32_t speed_test_kbytes = 512U; /* Adjust size to profile different transfers */
FATFS_SpeedTest(speed_test_kbytes);
FRESULT audio_res = Audio_SD_StartPlayback(AUDIO_FILE_DIRECTORY,
AUDIO_FILE_NAME,
(uint8_t *)audio_sd_buffer,
(UINT)sizeof(audio_sd_buffer));
if (audio_res != FR_OK)
{
printf("audio(fs): playback failed (%d)\r\n", (int)audio_res);
}
uint8_t audio_playback_reported = 0U;
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
Audio_SD_ProcessPlayback();
Spectrum_DrawIfDue();
if (audio_playback_reported == 0U)
{
if (audio_sd_ctx.state == AUDIO_SD_STATE_DONE)
{
printf("audio(fs): playback done\r\n");
audio_playback_reported = 1U;
}
else if (audio_sd_ctx.state == AUDIO_SD_STATE_ERROR)
{
printf("audio(fs): playback error (%d, hal %ld)\r\n",
(int)audio_sd_ctx.last_res, (long)audio_sd_ctx.last_hal);
audio_playback_reported = 1U;
}
}
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4;
RCC_OscInitStruct.PLL.PLLN = 84;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
static void FATFS_SpeedTest(uint32_t kilobytes)
{
const char speed_file[] = "sd_speed.bin";
FRESULT res;
UINT bytes_io = 0U;
uint32_t total_bytes = 0U;
uint32_t remaining = 0U;
uint32_t start_tick = 0U;
uint32_t elapsed_ms = 0U;
uint32_t speed_kbs = 0U;
uint8_t is_mounted = 0U;
uint8_t file_opened = 0U;
uint8_t file_created = 0U;
static uint8_t transfer_buffer[FATFS_SPEED_TEST_BUFFER_SIZE];
if (kilobytes == 0U)
{
printf("fatfs speed test: size parameter must be > 0\r\n");
return;
}
if (kilobytes > (UINT32_MAX / 1024U))
{
printf("fatfs speed test: size too large\r\n");
return;
}
total_bytes = kilobytes * 1024U;
for (uint32_t i = 0U; i < sizeof(transfer_buffer); ++i)
{
transfer_buffer[i] = (uint8_t)(i & 0xFFU);
}
printf("fatfs speed test: mounting %s\r\n", SDPath);
res = f_mount(&SDFatFS, (TCHAR const*)SDPath, 1);
if (res != FR_OK)
{
printf("fatfs speed test: mount failed (%d)\r\n", (int)res);
return;
}
is_mounted = 1U;
res = f_open(&SDFile, speed_file, FA_CREATE_ALWAYS | FA_WRITE);
if (res != FR_OK)
{
printf("fatfs speed test: open for write failed (%d)\r\n", (int)res);
goto cleanup;
}
file_opened = 1U;
file_created = 1U;
printf("fatfs speed test: writing %lu KB\r\n", (unsigned long)kilobytes);
remaining = total_bytes;
start_tick = HAL_GetTick();
while (remaining > 0U)
{
uint32_t chunk = (remaining > sizeof(transfer_buffer)) ? (uint32_t)sizeof(transfer_buffer) : remaining;
res = f_write(&SDFile, transfer_buffer, chunk, &bytes_io);
if ((res != FR_OK) || (bytes_io != chunk))
{
printf("fatfs speed test: write error (%d)\r\n", (int)res);
goto cleanup;
}
remaining -= chunk;
}
res = f_sync(&SDFile);
if (res != FR_OK)
{
printf("fatfs speed test: sync failed (%d)\r\n", (int)res);
goto cleanup;
}
elapsed_ms = HAL_GetTick() - start_tick;
speed_kbs = (elapsed_ms > 0U) ? (uint32_t)(((uint64_t)total_bytes * 1000ULL) / ((uint64_t)elapsed_ms * 1024ULL)) : 0U;
printf("fatfs speed test: write done in %lu ms (%lu KB/s)\r\n",
(unsigned long)elapsed_ms, (unsigned long)speed_kbs);
f_close(&SDFile);
file_opened = 0U;
res = f_open(&SDFile, speed_file, FA_READ);
if (res != FR_OK)
{
printf("fatfs speed test: open for read failed (%d)\r\n", (int)res);
goto cleanup;
}
file_opened = 1U;
printf("fatfs speed test: reading %lu KB\r\n", (unsigned long)kilobytes);
remaining = total_bytes;
start_tick = HAL_GetTick();
while (remaining > 0U)
{
uint32_t chunk = (remaining > sizeof(transfer_buffer)) ? (uint32_t)sizeof(transfer_buffer) : remaining;
res = f_read(&SDFile, transfer_buffer, chunk, &bytes_io);
if (res != FR_OK)
{
printf("fatfs speed test: read error (%d)\r\n", (int)res);
goto cleanup;
}
if (bytes_io == 0U)
{
printf("fatfs speed test: unexpected end of file\r\n");
goto cleanup;
}
remaining -= bytes_io;
}
elapsed_ms = HAL_GetTick() - start_tick;
speed_kbs = (elapsed_ms > 0U) ? (uint32_t)(((uint64_t)total_bytes * 1000ULL) / ((uint64_t)elapsed_ms * 1024ULL)) : 0U;
printf("fatfs speed test: read done in %lu ms (%lu KB/s)\r\n",
(unsigned long)elapsed_ms, (unsigned long)speed_kbs);
f_close(&SDFile);
file_opened = 0U;
printf("fatfs speed test: removing %s\r\n", speed_file);
res = f_unlink(speed_file);
if (res == FR_OK)
{
file_created = 0U;
}
else
{
printf("fatfs speed test: remove failed (%d)\r\n", (int)res);
}
cleanup:
if (file_opened)
{
f_close(&SDFile);
}
if (is_mounted && file_created)
{
FRESULT unlink_res = f_unlink(speed_file);
if (unlink_res != FR_OK)
{
printf("fatfs speed test: cleanup remove %s failed (%d)\r\n", speed_file, (int)unlink_res);
}
}
if (is_mounted)
{
f_mount(NULL, (TCHAR const*)SDPath, 0);
printf("fatfs speed test: unmounted\r\n");
}
}
void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef *hi2s)
{
if (hi2s->Instance != hi2s2.Instance)
{
return;
}
if (audio_stream_from_sd)
{
audio_sd_dma_done = 1U;
return;
}
if (audio_ctrl.samples_remaining == 0U)
{
audio_ctrl.state = AUDIO_PLAYBACK_STATE_DONE;
return;
}
if (Audio_StartNextChunk() != HAL_OK)
{
audio_ctrl.state = AUDIO_PLAYBACK_STATE_ERROR;
Error_Handler();
}
}
void HAL_I2S_ErrorCallback(I2S_HandleTypeDef *hi2s)
{
if (hi2s->Instance != hi2s2.Instance)
{
return;
}
if (audio_stream_from_sd)
{
audio_sd_ctx.state = AUDIO_SD_STATE_ERROR;
audio_sd_ctx.last_hal = HAL_ERROR;
audio_sd_ctx.last_res = FR_INT_ERR;
audio_sd_dma_done = 1U;
Audio_SD_StopAndCleanup();
return;
}
audio_ctrl.state = AUDIO_PLAYBACK_STATE_ERROR;
Error_Handler();
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */