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/* ... */
#include "main.h"
/* ... */
/* ... */
Includes
enum {
TRANSFER_WAIT,
TRANSFER_COMPLETE,
TRANSFER_ERROR
...};
#define SPI_ACK_BYTES 0xA5A5
#define SPI_NACK_BYTES 0xDEAD
#define SPI_TIMEOUT_MAX 0x1000
#define SPI_SLAVE_SYNBYTE 0x53
#define SPI_MASTER_SYNBYTE 0xAC
#define ADDRCMD_MASTER_READ ((uint16_t)0x1234)
#define ADDRCMD_MASTER_WRITE ((uint16_t)0x5678)
#define CMD_LENGTH ((uint16_t)0x0004)
#define DATA_LENGTH ((uint16_t)0x0020)
#define MASTER_BOARD
10 defines
SPI_HandleTypeDef SpiHandle;
uint8_t aTxMasterBuffer[] = "SPI - MASTER - Transmit message";
uint8_t aTxSlaveBuffer[] = "SPI - SLAVE - Transmit message ";
uint8_t aRxBuffer[DATA_LENGTH];
__IO uint32_t wTransferState = TRANSFER_WAIT;
Private variables
#ifdef MASTER_BOARD
static void Master_Synchro(void);
#else
static void Slave_Synchro(void);
#endif
static void SystemClock_Config(void);
static void Error_Handler(void);
static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);
static void Flush_Buffer(uint8_t* pBuffer, uint16_t BufferLength);Private function prototypes
/* ... */
int main(void)
{
#ifndef MASTER_BOARD
uint16_t addrcmd = 0;
uint16_t comlength = 0;/* ... */
#endif
uint8_t paddrcmd[CMD_LENGTH] = {0};
uint16_t ackbytes = 0x0000;
/* ... */
HAL_Init();
SystemClock_Config();
BSP_LED_Init(LED1);
BSP_LED_Init(LED4);
BSP_LED_Init(LED3);
SpiHandle.Instance = SPIx;
SpiHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
SpiHandle.Init.CLKPhase = SPI_PHASE_1EDGE;
SpiHandle.Init.CLKPolarity = SPI_POLARITY_LOW;
SpiHandle.Init.DataSize = SPI_DATASIZE_8BIT;
SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
SpiHandle.Init.TIMode = SPI_TIMODE_DISABLE;
SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
SpiHandle.Init.CRCPolynomial = 7;
SpiHandle.Init.NSS = SPI_NSS_SOFT;
#ifdef MASTER_BOARD
SpiHandle.Init.Mode = SPI_MODE_MASTER;
#else
SpiHandle.Init.Mode = SPI_MODE_SLAVE;
#endif
if(HAL_SPI_Init(&SpiHandle) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Init(&SpiHandle) != HAL_OK) { ... }
#ifdef MASTER_BOARD
BSP_PB_Init(BUTTON_WAKEUP,BUTTON_MODE_GPIO);
while (BSP_PB_GetState(BUTTON_WAKEUP) == GPIO_PIN_RESET)
{
BSP_LED_Toggle(LED1);
HAL_Delay(100);
}while (BSP_PB_GetState(BUTTON_WAKEUP) == GPIO_PIN_RESET) { ... }
BSP_LED_Off(LED1);/* ... */
#endif
while(1)
{
#ifdef MASTER_BOARD
Master_Synchro();
paddrcmd[0] = (uint8_t) (ADDRCMD_MASTER_READ >> 8);
paddrcmd[1] = (uint8_t) ADDRCMD_MASTER_READ;
paddrcmd[2] = (uint8_t) (DATA_LENGTH >> 8);
paddrcmd[3] = (uint8_t) DATA_LENGTH;
if(HAL_SPI_Transmit(&SpiHandle, paddrcmd, CMD_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Transmit(&SpiHandle, paddrcmd, CMD_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK) { ... }
Master_Synchro();
ackbytes = 0;
if(HAL_SPI_Receive(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Receive(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK) { ... }
if(ackbytes == SPI_ACK_BYTES)
{
Master_Synchro();
if(HAL_SPI_Receive(&SpiHandle, aRxBuffer, DATA_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Receive(&SpiHandle, aRxBuffer, DATA_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK) { ... }
Master_Synchro();
ackbytes = SPI_ACK_BYTES;
if(HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK) { ... }
}if (ackbytes == SPI_ACK_BYTES) { ... }
else
{
Error_Handler();
}else { ... }
if(Buffercmp((uint8_t*)aTxSlaveBuffer, (uint8_t*)aRxBuffer, CMD_LENGTH))
{
Error_Handler();
}if (Buffercmp((uint8_t*)aTxSlaveBuffer, (uint8_t*)aRxBuffer, CMD_LENGTH)) { ... }
else
{
BSP_LED_Toggle(LED4);
}else { ... }
Master_Synchro();
paddrcmd[0] = (uint8_t) (ADDRCMD_MASTER_WRITE >> 8);
paddrcmd[1] = (uint8_t) ADDRCMD_MASTER_WRITE;
paddrcmd[2] = (uint8_t) (DATA_LENGTH >> 8);
paddrcmd[3] = (uint8_t) DATA_LENGTH;
if(HAL_SPI_Transmit(&SpiHandle, paddrcmd, CMD_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Transmit(&SpiHandle, paddrcmd, CMD_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK) { ... }
Master_Synchro();
ackbytes = 0;
if(HAL_SPI_Receive(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Receive(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK) { ... }
if(ackbytes == SPI_ACK_BYTES)
{
Master_Synchro();
if(HAL_SPI_Transmit(&SpiHandle, aTxMasterBuffer, DATA_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Transmit(&SpiHandle, aTxMasterBuffer, DATA_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK) { ... }
Master_Synchro();
ackbytes = 0;
if(HAL_SPI_Receive(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Receive(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK) { ... }
}if (ackbytes == SPI_ACK_BYTES) { ... }
else
{
Error_Handler();
}else { ... }
Flush_Buffer(aRxBuffer, DATA_LENGTH);
BSP_LED_Toggle(LED1);
HAL_Delay(500);
}/* ... */
while (1) { ... }#else
Slave_Synchro();
if(HAL_SPI_Receive(&SpiHandle, paddrcmd, CMD_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Receive(&SpiHandle, paddrcmd, CMD_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK) { ... }
addrcmd = (uint16_t) ((paddrcmd[0] << 8) | paddrcmd[1]);
comlength = (uint16_t) ((paddrcmd[2] << 8) | paddrcmd[3]);
if(((addrcmd == ADDRCMD_MASTER_READ) || (addrcmd == ADDRCMD_MASTER_WRITE)) && (comlength > 0))
{
Slave_Synchro();
ackbytes = SPI_ACK_BYTES;
if(HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK) { ... }
if(addrcmd == ADDRCMD_MASTER_READ)
{
Slave_Synchro();
if(HAL_SPI_Transmit(&SpiHandle, aTxSlaveBuffer, DATA_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Transmit(&SpiHandle, aTxSlaveBuffer, DATA_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK) { ... }
Slave_Synchro();
ackbytes = 0;
if(HAL_SPI_Receive(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Receive(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK) { ... }
if(ackbytes != SPI_ACK_BYTES)
{
Error_Handler();
}if (ackbytes != SPI_ACK_BYTES) { ... }
}if (addrcmd == ADDRCMD_MASTER_READ) { ... }
else if(addrcmd == ADDRCMD_MASTER_WRITE)
{
Slave_Synchro();
if(HAL_SPI_Receive(&SpiHandle, aRxBuffer, DATA_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Receive(&SpiHandle, aRxBuffer, DATA_LENGTH, SPI_TIMEOUT_MAX) != HAL_OK) { ... }
Slave_Synchro();
ackbytes = SPI_ACK_BYTES;
if(HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK) { ... }
if(Buffercmp((uint8_t*)aTxMasterBuffer, (uint8_t*)aRxBuffer, DATA_LENGTH))
{
Error_Handler();
}if (Buffercmp((uint8_t*)aTxMasterBuffer, (uint8_t*)aRxBuffer, DATA_LENGTH)) { ... }
else
{
BSP_LED_Toggle(LED4);
}else { ... }
}else if (addrcmd == ADDRCMD_MASTER_WRITE) { ... }
}if (((addrcmd == ADDRCMD_MASTER_READ) || (addrcmd == ADDRCMD_MASTER_WRITE)) && (comlength > 0)) { ... }
else
{
Slave_Synchro();
ackbytes = SPI_NACK_BYTES;
if(HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_Transmit(&SpiHandle, (uint8_t *)&ackbytes, sizeof(ackbytes), SPI_TIMEOUT_MAX) != HAL_OK) { ... }
Error_Handler();
}else { ... }
Flush_Buffer(aRxBuffer, DATA_LENGTH);
}/* ... */
main (void) { ... }#endif
}
#ifdef MASTER_BOARD
/* ... */
static void Master_Synchro(void)
{
uint8_t txackbytes = SPI_MASTER_SYNBYTE, rxackbytes = 0x00;
do
{
if(HAL_SPI_TransmitReceive(&SpiHandle, (uint8_t *)&txackbytes, (uint8_t *)&rxackbytes, 1, HAL_MAX_DELAY) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_TransmitReceive(&SpiHandle, (uint8_t *)&txackbytes, (uint8_t *)&rxackbytes, 1, HAL_MAX_DELAY) != HAL_OK) { ... }
...}while(rxackbytes != SPI_SLAVE_SYNBYTE);
}{ ... }
#else/* ... */
/* ... */
static void Slave_Synchro(void)
{
uint8_t txackbyte = SPI_SLAVE_SYNBYTE, rxackbyte = 0x00;
do
{
if (HAL_SPI_TransmitReceive(&SpiHandle, (uint8_t *)&txackbyte, (uint8_t *)&rxackbyte, 1, HAL_MAX_DELAY) != HAL_OK)
{
Error_Handler();
}if (HAL_SPI_TransmitReceive(&SpiHandle, (uint8_t *)&txackbyte, (uint8_t *)&rxackbyte, 1, HAL_MAX_DELAY) != HAL_OK) { ... }
...}
while (rxackbyte != SPI_MASTER_SYNBYTE);
}Slave_Synchro (void) { ... }
/* ... */#endif
/* ... */
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
HAL_StatusTypeDef ret = HAL_OK;
__HAL_RCC_PWR_CLK_ENABLE();
/* ... */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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 = 8;
RCC_OscInitStruct.PLL.PLLN = 200;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
RCC_OscInitStruct.PLL.PLLR = 2;
ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
if(ret != HAL_OK)
{
while(1) { ; }
}if (ret != HAL_OK) { ... }
/* ... */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | 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;
ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3);
if(ret != HAL_OK)
{
while(1) { ; }
}if (ret != HAL_OK) { ... }
}{ ... }
/* ... */
void HAL_SPI_ErrorCallback(SPI_HandleTypeDef *hspi)
{
Error_Handler();
}{ ... }
/* ... */
static void Error_Handler(void)
{
BSP_LED_On(LED3);
while (1)
{
}while (1) { ... }
}{ ... }
/* ... */
static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength)
{
while (BufferLength--)
{
if ((*pBuffer1) != *pBuffer2)
{
return BufferLength;
}if ((*pBuffer1) != *pBuffer2) { ... }
pBuffer1++;
pBuffer2++;
}while (BufferLength--) { ... }
return 0;
}{ ... }
/* ... */
static void Flush_Buffer(uint8_t* pBuffer, uint16_t BufferLength)
{
while (BufferLength--)
{
*pBuffer = 0;
pBuffer++;
}while (BufferLength--) { ... }
}{ ... }
#ifdef USE_FULL_ASSERT
/* ... */
void assert_failed(uint8_t *file, uint32_t line)
{
/* ... */
while (1)
{
}while (1) { ... }
}assert_failed (uint8_t *file, uint32_t line) { ... }
/* ... */#endif
/* ... */
/* ... */