#include "at24c64.h"
#include "i2c.h"
#define AT24CXX_ADDR_READ   0xA1
#define AT24CXX_ADDR_WRITE   0xA0
#define PAGE_SIZE   32
/** * @brief        Read multiple bytes of data from any address of AT24C64 * @param        addr —— Address to read data (0-65535) * @param        dat  —— Address to store read data * @retval        Success —— HAL_OK*/
uint8_t At24cxx_Read_Amount_Byte(uint16_t addr, uint8_t* recv_buf, uint16_t size){
    return HAL_I2C_Mem_Read(&hi2c2, AT24CXX_ADDR_READ, addr, I2C_MEMADD_SIZE_16BIT, recv_buf, size, 0xFFFFFFFF);
}
/** * @brief        Write multiple bytes of data to any address of AT24C64 * @param        addr —— Address to write data (0-65535) * @param        dat  —— Address to store written data * @retval        Success —— HAL_OK*/
uint8_t At24cxx_Write_Amount_Byte(uint16_t addr, uint8_t* dat, uint16_t size){
    uint8_t i = 0;
    uint16_t cnt = 0;
    // Count of bytes written
    /* For the starting address, there are two cases to consider */
    if(0 == addr % PAGE_SIZE )    {
        /* Starting address is exactly the page start address */
        /* For the number of bytes to write, there are two cases to consider */
        if(size <= PAGE_SIZE)        {
            // Number of bytes to write is not greater than one page, write directly
            return HAL_I2C_Mem_Write(&hi2c2, AT24CXX_ADDR_WRITE, addr, I2C_MEMADD_SIZE_16BIT, dat, size, 0xFFFFFFFF);
        }
        else        {
            // Number of bytes to write is greater than one page, write the whole page in a loop
            for(i = 0;i < size/PAGE_SIZE; i++)            {
                HAL_I2C_Mem_Write(&hi2c2, AT24CXX_ADDR_WRITE, addr, I2C_MEMADD_SIZE_16BIT, &dat[cnt], PAGE_SIZE, 0xFFFFFFFF);
                HAL_Delay(3);
                addr += PAGE_SIZE;
                cnt += PAGE_SIZE;
            }
            // Write the remaining bytes
            return HAL_I2C_Mem_Write(&hi2c2, AT24CXX_ADDR_WRITE, addr, I2C_MEMADD_SIZE_16BIT, &dat[cnt], size - cnt, 0xFFFFFFFF);
        }
    }
    else    {
        /* Starting address deviates from the page start address */
        /* For the number of bytes to write, there are two cases to consider */
        if(size <= (PAGE_SIZE - addr%PAGE_SIZE))        {
            /* Can write all in this page */
            return HAL_I2C_Mem_Write(&hi2c2, AT24CXX_ADDR_WRITE, addr, I2C_MEMADD_SIZE_16BIT, dat, size, 0xFFFFFFFF);
        }
        else        {
            /* This page cannot be fully written */
            // First finish writing this page
            cnt += PAGE_SIZE - addr%PAGE_SIZE;
            HAL_I2C_Mem_Write(&hi2c2, AT24CXX_ADDR_WRITE, addr, I2C_MEMADD_SIZE_16BIT, dat, cnt, 0xFFFFFFFF);
            addr += cnt;
            HAL_Delay(3);
            // Loop to write whole page data
            for(i = 0;i < (size - cnt)/PAGE_SIZE; i++)            {
                HAL_I2C_Mem_Write(&hi2c2, AT24CXX_ADDR_WRITE, addr, I2C_MEMADD_SIZE_16BIT, &dat[cnt], PAGE_SIZE, 0xFFFFFFFF);
                HAL_Delay(3);
                addr += PAGE_SIZE;
                cnt += PAGE_SIZE;
            }
            // Write the remaining bytes
            return HAL_I2C_Mem_Write(&hi2c2, AT24CXX_ADDR_WRITE, addr, I2C_MEMADD_SIZE_16BIT, &dat[cnt], size - cnt, 0xFFFFFFFF);
        }                }
}