AirControlValve/User/IAP.c

/* Copyright Statement:
 *
 * This software/firmware and related documentation ("AutoChips Software") are
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#include <string.h>
#include "IAP.h" 


static __align(4)uint8_t WriteDataBuff[2048];

static uint32_t s_writeAddress;

static uint8_t s_iapStep;

static uint32_t s_writeDataBuffSeek;


void IAP_Start(void)
{
    if (s_iapStep == 1)
    {
        return;     ///<repeat start
    }
    s_writeAddress = APP_ADDRESS;
    s_iapStep = 1;
}
int IAP_Write(uint8_t *pdata, uint16_t length)
{
    EFLASH_StatusType ret = EFLASH_STATUS_SUCCESS;
    uint16_t MiniLength = 0;
    if (s_iapStep != 1)     ///<防止用户不先调用start就开始写
        return -1;
    while (length > 0)
    {
        if ((s_writeAddress < APP_ADDRESS) || (s_writeAddress >= APP_ADDRESS_END))  ///<IAP不能超出APP_BKP地址范围
            return -1;
        if (s_writeDataBuffSeek + length > 2048)    ///得到单次写入的长度
        {
            MiniLength = 2048 - s_writeDataBuffSeek;    ///<长度超出buff
        }
        else
        {
            MiniLength = length;    ///<全部写完，
        }
        memcpy(&WriteDataBuff[s_writeDataBuffSeek], pdata, MiniLength);
        pdata += MiniLength;
        s_writeDataBuffSeek += MiniLength;
        length -= MiniLength;
        if (s_writeDataBuffSeek == 2048)
        {
            EFLASH_UnlockCtrl();
            ret = EFLASH_PageErase(s_writeAddress);     ///<erase page
            if (ret != EFLASH_STATUS_SUCCESS) return -1;
            ret = EFLASH_PageEraseVerify(s_writeAddress);   ///< verify erase state
            if (ret != EFLASH_STATUS_SUCCESS) return -1;
            ret = EFLASH_PageProgram(s_writeAddress, (uint32_t *)WriteDataBuff, 512); 
            if (ret != EFLASH_STATUS_SUCCESS) return -1;
            EFLASH_LockCtrl();
            s_writeAddress += 2048;
            s_writeDataBuffSeek = 0;
        }
    }
    return 0;
}

int IAP_Stop(void)
{
    EFLASH_StatusType ret = EFLASH_STATUS_SUCCESS;
    s_iapStep = 0;  ///<stop后重置step
    if ((s_writeAddress < APP_ADDRESS) || (s_writeAddress >= APP_ADDRESS_END))  ///<IAP不能超出APP_BKP地址范围
        return -1;
    EFLASH_UnlockCtrl();
    ret = EFLASH_PageErase(s_writeAddress);     ///<erase page
    if (ret != EFLASH_STATUS_SUCCESS) return -1;
    ret = EFLASH_PageEraseVerify(s_writeAddress);   ///< verify erase state
    if (ret != EFLASH_STATUS_SUCCESS) return -1;
    ret = EFLASH_PageProgram(s_writeAddress, (uint32_t *)WriteDataBuff, 512);   ///<此处应该不满2048，但还是全部写入，后面为多余字节
    if (ret != EFLASH_STATUS_SUCCESS) return -1;
    EFLASH_LockCtrl();
    return 0;
}