1. 修改usart.c,将printf转为串口打印
/* USER CODE BEGIN 0 */
#include "stdio.h"
int fputc(int ch, FILE *f)
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART2 and Loop until the end of transmission */
HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF);
return ch;
}
/* USER CODE END 0 */
2.修改i2c.c
void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(i2cHandle->Instance==I2C1)
{
/* USER CODE BEGIN I2C1_MspInit 0 */
/* USER CODE END I2C1_MspInit 0 */
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_I2C1_CLK_ENABLE();
/**I2C1 GPIO Configuration
PB6 ------> I2C1_SCL
PB7 ------> I2C1_SDA
*/
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* I2C1 clock enable */
/* USER CODE BEGIN I2C1_MspInit 1 */
/* USER CODE END I2C1_MspInit 1 */
}
}
3.修改main.c
增加头文件：
#include "main.h"
#include "i2c.h"
#include "usart.h"
#include "gpio.h"
#include <stdio.h>
#include <string.h>
/* USER CODE BEGIN 1 */
#define ADDR_24LCxx_Write 0xA0
#define ADDR_24LCxx_Read 0xA1
#define BufferSize 256
uint8_t WriteBuffer[256] = { 0 };
uint8_t ReadBuffer[256] = { 0 };
uint16_t i = 0;
/* USER CODE END 1 */
/* USER CODE BEGIN 2 */
printf("\r\n***************I2C Example00*******************************\r\n");
HAL_StatusTypeDef status = HAL_OK;
for(i=0; i<256; i++)
{
WriteBuffer[i]=i; /* WriteBuffer Initialization */
printf("%02d ", WriteBuffer[i]);
}
unsigned int iPageSize = 8;
for(i=0; i<256/iPageSize; i++)
{
if (HAL_I2C_Mem_Write(&hi2c1, ADDR_24LCxx_Write, i*iPageSize, I2C_MEMADD_SIZE_16BIT,&(WriteBuffer[i*iPageSize]),iPageSize, 1000) == HAL_OK)
{
//printf("\r\n Byte %02d to Byte %02d Write OK",i,i+8);
HAL_Delay(5);//写完以后需要延时5ms，这个不能少
}else{
//printf("\r\n Byte %02d to Byte %02d Write Failed",i,i+8);
}
}
/* read date from EEPROM */
status = HAL_I2C_Mem_Read(&hi2c1, ADDR_24LCxx_Read, 0, I2C_MEMADD_SIZE_16BIT,ReadBuffer,BufferSize, 0x1000);
printf("%d\r\n",status);
for(i=0; i<256; i++)
printf("%02d ",ReadBuffer[i]);
if(memcmp(ReadBuffer,WriteBuffer,256) == 0 ) /* check data */
printf("\r\n AT24C02 Read Test OK\r\n");
else
printf("\r\n AT24C02 Read Test Failed\r\n");
/* USER CODE END 2 */