#include "stm32f4xx_flash.h"
#include "stm32f4xx.h"
#include "modbus.h"
#include "modbus_flash.h"
#include "string.h"

extern uint8_t ModbusCoil[1250];  
extern uint16_t ModbusReg[10000];


uint8_t ModbusCoilWriteFlash(void)
{
    uint32_t addres = MODBUS_FLASH_COIL_ADDR;
    uint16_t halfWord;
    FLASH_Status status;

    FLASH_Unlock();
    /*扇区擦除，写入之前必须先擦除*/
    status = FLASH_EraseSector(MODBUS_FLASH_SECTOR, VoltageRange_3);

    for(uint16_t i = 0; i < 1250; i += 2)
    {
        /*前面的放在低字节，后面的放在高字节*/
        halfWord =  ((uint16_t)ModbusCoil[i + 1] << 8) | ((uint16_t)ModbusCoil[i]);

        status = FLASH_ProgramHalfWord(addres, ModbusCoil[i]);

        /*写入失败，停止写入*/
        if(status != FLASH_COMPLETE)
        {
            break;
        }

        addres += 2;
    }
    FLASH_Lock();
}


uint8_t ModbusRegWriteFlash(void)
{
    uint32_t addres = MODBUS_FLASH_REG_ADDR;
    FLASH_Status status;

    FLASH_Unlock();
    /*扇区擦除，写入之前必须先擦除*/
    status = FLASH_EraseSector(MODBUS_FLASH_SECTOR, VoltageRange_3);

    for(uint16_t i = 0; i < 10000; i++)
    {
        status = FLASH_ProgramHalfWord(addres, ModbusReg[i]);

        /*写入失败，停止写入*/
        if(status != FLASH_COMPLETE)
        {
            break;
        }

        addres += 2;
    }

    FLASH_Lock();
}


uint8_t ModbusRegReadFlash(void)
{
    memcpy(ModbusCoil, (const void *)MODBUS_FLASH_COIL_ADDR, 1250);
}

uint8_t ModbusCoilReadFlash(void)
{
    memcpy(ModbusReg, (const void *)MODBUS_FLASH_REG_ADDR, 10000);
}