IAP LPC 8000

来源：互联网发布：01年总决赛艾弗森数据编辑：程序博客网时间：2024/04/29 23:42

Cannot access Memory
Cannot access Memory
*** error 122: AGDI: memory read failed (0xFFFFFFFE)
Cannot access Memory
Cannot access Memory
Cannot access Memory
Cannot access Memory

WS 1, `adr

1.设置

2. IAP flash地址请参考 LPC812的Datasheet,我们用的芯片的 Flash是 16M的

注意Datasheet规定：最小擦写单位是 one page, 1page分为64Byte, 按page擦除所以最小擦除擦写的起始地址必须是sector 或者page的起始地址（我用的sector起始地址，但是一定要注意，这片地址内没有你写的程序，否则会把自己download到flash中的程序给擦除了，一定要不能和自己的程序代码空间重合）

原文：The size of a sector is 1KB and the size of a page is 64Byte. One Sector contains 16 pages.

//uint32_t IAP_FLASH_ADDRESS_3rd_SECTOR 0x0c00 //Flash 3th Sector, 48th page, address 0x0c00 ,只要是sector或者页起始地址就行
//uint32_t IAP_FLASH_ADDRESS = 0x1c00; //Flash 7th Sector, 112th page, address 0x1c00
uint32_t IAP_FLASH_ADDRESS = 0x3C00; //Flash 15th Sector,240th page, address 0x3c00

3. 函数

主函数的部分配置

SystemCoreClockUpdate();

// remap to show all of Flash
LPC_SYSCON->SYSMEMREMAP = 2;
CLKOUT_Setup( CLKOUTCLK_SRC_MAIN_CLK );

api函数：

/*
* Program Data in Flash Memory
* Parameter: adr: Destination Start Address
* sz: Data Size
* buf: Source Data
* Return Value: 0 - OK, 1 - Failed
*/

int Program (uint32_t adr, uint32_t sz, uint8_t *buf)
{
uint32_t n;

#if SET_VALID_CODE != 0 // Set valid User Code Signature
if (adr == 0) { // Check for Vector Table
n = *((uint32_t *)(buf + 0x00)) +
*((uint32_t *)(buf + 0x04)) +
*((uint32_t *)(buf + 0x08)) +
*((uint32_t *)(buf + 0x0C)) +
*((uint32_t *)(buf + 0x10)) +
*((uint32_t *)(buf + 0x14)) +
*((uint32_t *)(buf + 0x18));
*((uint32_t *)(buf + 0x1C)) = 0 - n; // Signature at Reserved Vector
}
#endif

n = GetSecNum(adr); // Get Sector Number

IAP.cmd = IAP_PREPARE; // Prepare Sector for Write
IAP.par[0] = n; // Start Sector
IAP.par[1] = n; // End Sector
IAP_Call (&IAP.cmd, &IAP.stat); // Call IAP Command
if (IAP.stat) return (IAP.stat); // Command Failed

IAP.cmd = IAP_COPY_RAM2FLASH; // Copy RAM to Flash
IAP.par[0] = adr; // Destination Flash Address
IAP.par[1] = (uint32_t)buf; // Source RAM Address
IAP.par[2] = sz; // Number of bytes
IAP.par[3] = SystemCoreClock / 1000; // CCLK in kHz
IAP_Call (&IAP.cmd, &IAP.stat); // Call IAP Command
if (IAP.stat) return (IAP.stat); // Command Failed

return (0); // Finished without Errors
}

int EraseAllPage(void)
{
IAP.cmd = IAP_PREPARE; // Prepare Sector for Erase
IAP.par[0] = 0; // Start Sector
IAP.par[1] = 15; // End Sector
IAP_Call (&IAP.cmd, &IAP.stat); // Call IAP Command
if (IAP.stat) return (IAP.stat); // Command Failed

IAP.cmd = IAP_ERASE_PAGE; // Erase Page
IAP.par[0] = 0; // Start page
IAP.par[1] = 255; // End page
IAP.par[2] = SystemCoreClock / 1000; // CCLK in kHz
IAP_Call (&IAP.cmd, &IAP.stat); // Call IAP Command
if (IAP.stat) return (IAP.stat); // Command Failed

return (0); // Finished without Errors

}