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/* ... */
#include "main.h"
/* ... */
/* ... */
Includes
#define MASTER_BOARD
#define I2C_ADDRESS 0x3E
#define MASTER_REQ_READ 0x12
#define MASTER_REQ_WRITE 0x34
Private macro
I2C_HandleTypeDef I2CxHandle;
uint8_t aTxBuffer[] = " ****I2C_TwoBoards advanced communication based on IT**** ****I2C_TwoBoards advanced communication based on IT**** ****I2C_TwoBoards advanced communication based on IT**** ";
uint8_t aRxBuffer[RXBUFFERSIZE];
uint16_t hTxNumData = 0, hRxNumData = 0;
uint8_t bTransferRequest = 0;
Private variables
static void SystemClock_Config(void);
static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);
static void Flush_Buffer(uint8_t* pBuffer, uint16_t BufferLength);
static void Error_Handler(void);
Private function prototypes
/* ... */
int main(void)
{
/* ... */
HAL_Init();
SystemClock_Config();
BSP_LED_Init(LED2);
I2CxHandle.Instance = I2Cx;
I2CxHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
I2CxHandle.Init.ClockSpeed = 400000;
I2CxHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
I2CxHandle.Init.DutyCycle = I2C_DUTYCYCLE_16_9;
I2CxHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
I2CxHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
I2CxHandle.Init.OwnAddress1 = I2C_ADDRESS;
I2CxHandle.Init.OwnAddress2 = 0;
if(HAL_I2C_Init(&I2CxHandle) != HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Init(&I2CxHandle) != HAL_OK) { ... }
#ifdef MASTER_BOARD
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
while (BSP_PB_GetState(BUTTON_KEY) == 1)
{
BSP_LED_Toggle(LED2);
HAL_Delay(1000);
}while (BSP_PB_GetState(BUTTON_KEY) == 1) { ... }
while (BSP_PB_GetState(BUTTON_KEY) == 0)
{
}while (BSP_PB_GetState(BUTTON_KEY) == 0) { ... }
BSP_LED_Off(LED2);
while(1)
{
hTxNumData = TXBUFFERSIZE;
hRxNumData = RXBUFFERSIZE;
bTransferRequest = MASTER_REQ_WRITE;
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&hTxNumData, 2)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&hTxNumData, 2)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
bTransferRequest = MASTER_REQ_READ;
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&bTransferRequest, 1)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
do
{
if(HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&hRxNumData, 2)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Transmit_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)&hRxNumData, 2)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
do
{
if(HAL_I2C_Master_Receive_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)aRxBuffer, RXBUFFERSIZE)!= HAL_OK)
{
Error_Handler();
}if (HAL_I2C_Master_Receive_IT(&I2CxHandle, (uint16_t)I2C_ADDRESS, (uint8_t*)aRxBuffer, RXBUFFERSIZE)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
/* ... */
...}
while(HAL_I2C_GetError(&I2CxHandle) == HAL_I2C_ERROR_AF);
if(Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,hRxNumData))
{
Error_Handler();
}if (Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,hRxNumData)) { ... }
Flush_Buffer((uint8_t*)aRxBuffer,RXBUFFERSIZE);
BSP_LED_Toggle(LED2);
HAL_Delay(25);
}while (1) { ... }
/* ... */#else
while(1)
{
hTxNumData = 0;
hRxNumData = 0;
while(HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)&bTransferRequest, 1)!= HAL_OK)
{
}while (HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)&bTransferRequest, 1)!= HAL_OK) { ... }
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
if (bTransferRequest == MASTER_REQ_WRITE)
{
while(HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)&hRxNumData, 2)!= HAL_OK);
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
while(HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)aRxBuffer, hRxNumData)!= HAL_OK);
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
if(Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,hRxNumData))
{
Error_Handler();
}if (Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,hRxNumData)) { ... }
Flush_Buffer((uint8_t*)aRxBuffer,RXBUFFERSIZE);
BSP_LED_Toggle(LED2);
}if (bTransferRequest == MASTER_REQ_WRITE) { ... }
else
{
while(HAL_I2C_Slave_Receive_IT(&I2CxHandle, (uint8_t*)&hTxNumData, 2)!= HAL_OK);
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
while(HAL_I2C_Slave_Transmit_IT(&I2CxHandle, (uint8_t*)aTxBuffer, RXBUFFERSIZE)!= HAL_OK);
/* ... */
while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY)
{
}while (HAL_I2C_GetState(&I2CxHandle) != HAL_I2C_STATE_READY) { ... }
}else { ... }
}while (1) { ... }
/* ... */#endif
}{ ... }
/* ... */
static void Error_Handler(void)
{
BSP_LED_On(LED2);
HAL_Delay(500);
BSP_LED_Off(LED2);
HAL_Delay(500);
while(1)
{
}while (1) { ... }
}{ ... }
/* ... */
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_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 0x10;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 16;
RCC_OscInitStruct.PLL.PLLN = 360;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
RCC_OscInitStruct.PLL.PLLR = 6;
if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { ... }
ret = HAL_PWREx_EnableOverDrive();
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_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
{
Error_Handler();
}if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { ... }
}{ ... }
/* ... */
void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *I2cHandle)
{
/* ... */
if (HAL_I2C_GetError(I2cHandle) != HAL_I2C_ERROR_AF)
{
Error_Handler();
}if (HAL_I2C_GetError(I2cHandle) != HAL_I2C_ERROR_AF) { ... }
}{ ... }
/* ... */
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
/* ... */
/* ... */