/* Copyright Statement:
 *
 * This software/firmware and related documentation ("AutoChips Software") are
 * protected under relevant copyright laws. The information contained herein is
 * confidential and proprietary to AutoChips Inc. and/or its licensors. Without
 * the prior written permission of AutoChips inc. and/or its licensors, any
 * reproduction, modification, use or disclosure of AutoChips Software, and
 * information contained herein, in whole or in part, shall be strictly
 * prohibited.
 *
 * AutoChips Inc. (C) 2016. All rights reserved.
 *
 * BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
 * THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("AUTOCHIPS SOFTWARE")
 * RECEIVED FROM AUTOCHIPS AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER
 * ON AN "AS-IS" BASIS ONLY. AUTOCHIPS EXPRESSLY DISCLAIMS ANY AND ALL
 * WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NONINFRINGEMENT. NEITHER DOES AUTOCHIPS PROVIDE ANY WARRANTY WHATSOEVER WITH
 * RESPECT TO THE SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY,
 * INCORPORATED IN, OR SUPPLIED WITH THE AUTOCHIPS SOFTWARE, AND RECEIVER AGREES
 * TO LOOK ONLY TO SUCH THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO.
 * RECEIVER EXPRESSLY ACKNOWLEDGES THAT IT IS RECEIVER'S SOLE RESPONSIBILITY TO
 * OBTAIN FROM ANY THIRD PARTY ALL PROPER LICENSES CONTAINED IN AUTOCHIPS
 * SOFTWARE. AUTOCHIPS SHALL ALSO NOT BE RESPONSIBLE FOR ANY AUTOCHIPS SOFTWARE
 * RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
 * STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY AND AUTOCHIPS'S
 * ENTIRE AND CUMULATIVE LIABILITY WITH RESPECT TO THE AUTOCHIPS SOFTWARE
 * RELEASED HEREUNDER WILL BE, AT AUTOCHIPS'S OPTION, TO REVISE OR REPLACE THE
 * AUTOCHIPS SOFTWARE AT ISSUE, OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE
 * CHARGE PAID BY RECEIVER TO AUTOCHIPS FOR SUCH AUTOCHIPS SOFTWARE AT ISSUE.
 */
 
#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;
}