Hi All.
Please help me!
Platform/Configurations:
stm32F746IGT6
EEPROM 24AA025E48T
PB7(165) SDA
PB8(167) SCL
1. Code generated from STM32CubeMx:
static void MX_I2C1_Init(void)
{
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x00303D5B;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
{
Error_Handler();
}
}
2. My Functions for validate read/write:
uint16_t devAddr = (0x50 << 1); // 0xA0
uint16_t memAddr = 0x0100;
HAL_StatusTypeDef status;
void init() {
const char wmsg[] = "Some data";
char rmsg[sizeof(wmsg)];
// HAL expects address to be shifted one bit to the left
// Hint: try to comment this line
HAL_I2C_Mem_Write(&hi2c1, devAddr, memAddr, I2C_MEMADD_SIZE_16BIT,
(uint8_t*)wmsg, sizeof(wmsg), HAL_MAX_DELAY);
for(;;) { // wait...
status = HAL_I2C_IsDeviceReady(&hi2c1, devAddr, 1,
HAL_MAX_DELAY);
if(status == HAL_OK)
break;
}
memset(rmsg, 0, sizeof(rmsg));
HAL_I2C_Mem_Read(&hi2c1, devAddr, memAddr, I2C_MEMADD_SIZE_16BIT,
(uint8_t*)rmsg, sizeof(rmsg), HAL_MAX_DELAY);
if(memcmp(rmsg, wmsg, sizeof(rmsg)) == 0) {
const char result[] = "Test passed!\r\n";
funcOk();
} else {
funcFail();
}
}
void funcOk()
{
while(1)
{
}
}
void funcFail()
{
while(1)
{
}
}
3. Result:
Write data to i2c EEPROM
uint16_t devAddr = (0x50 << 1);// 0xA0
uint16_t memAddr = 0x0100;
wmsg = "Some data"
wmsg[0]=0x53;'S'
wmsg[1]=0x6F;'o'
wmsg[2]=0x6D;'m'
wmsg[3]=0x65;'e'
wmsg[4]=0x20;' '
wmsg[5]=0x64;'d'
wmsg[6]=0x61;'a'
wmsg[7]=0x74;'d'
wmsg[8]=0x61;'a'
wmsg[9]=0x00;
HAL_I2C_Mem_Write(&hi2c1, devAddr, memAddr, I2C_MEMADD_SIZE_16BIT, (uint8_t*)wmsg, sizeof(wmsg), HAL_MAX_DELAY);
Read data to i2c EEPROM
memset(rmsg, 0, sizeof(rmsg));
HAL_I2C_Mem_Read(&hi2c1, devAddr, memAddr, I2C_MEMADD_SIZE_16BIT, (uint8_t*)rmsg, sizeof(rmsg), HAL_MAX_DELAY);
rmsg[0]=0x61;'a'
rmsg[1]=0x00;
rmsg[2]=0x6D;'m'
rmsg[3]=0x65;'e'
rmsg[4]=0x20;' '
rmsg[5]=0x64;'d'
rmsg[6]=0x00;
rmsg[7]=0x1E;
rmsg[8]=0x10;
rmsg[9]=0x00;
