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Marco S
Marco S
Associate III
Sep 12, 2017 12:52 PM UTC
Question

Error when trying to save a variable in an EEPROM using I2C

Posted on September 12, 2017 at 14:52

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    1 reply

    Marco S
    Marco SAuthor
    Associate III
    Sep 13, 2017 8:25 AM UTC
    Posted on September 13, 2017 at 10:25

    I have solved the problem by changing these functions:

    HAL_I2C_Mem_Read_DMA(&hi2c1, (uint16_t)EEPROM_ADDRESS, 0, I2C_MEMADD_SIZE_16BIT, (uint8_t *)aRxBuffer, RXBUFFERSIZE)

    HAL_I2C_Mem_Write_DMA(&hi2c1 , (uint16_t)EEPROM_ADDRESS, Memory_Address, I2C_MEMADD_SIZE_16BIT, (uint8_t*)(aTxBuffer + Memory_Address), EEPROM_PAGESIZE)

    to these ones:

    HAL_I2C_Mem_Read(&hi2c1, (uint16_t)EEPROM_ADDRESS, 0, I2C_MEMADD_SIZE_16BIT, (uint8_t *)aRxBuffer, RXBUFFERSIZE, 0x10)

    HAL_I2C_Mem_Write(&hi2c1 , (uint16_t)EEPROM_ADDRESS, Memory_Address, I2C_MEMADD_SIZE_16BIT, (uint8_t*)(aTxBuffer + Memory_Address), EEPROM_PAGESIZE, 0x10)

    Also, I changed the EEPROM address to: 

    #define EEPROM_ADDRESS          (0x50<<1)

    I still don't understand why the example proposed by ST doesn't work in with the evaluation board I'm using.

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