使用其它MCU對STC15系列單片機進行串口ISP下載舉例(等于開放了STC的isp下載協議）
使用其它MCU對STC15系列單片機進行串口ISP下載舉例(等于開放了STC單片機的isp下載協議）
//本示例在Keil開發環境下請選擇Intel的8058芯片型號進行編譯
//假定測試芯片的工作頻率為11.0592MHz
//注意:使用本代碼對STC15系列的單片機進行下載時,必須要執行了Download代碼之后,
//才能給目標芯片上電,否則目標芯片將無法正確下載
#include "reg51.h"
typedef bit BOOL;
typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned long DWORD;
//宏、常量定義
#define FALSE 0
#define TRUE 1
#define LOBYTE(w) ((BYTE)(WORD)(w))
#define HIBYTE(w) ((BYTE)((WORD)(w) >> 8))
#define MINBAUD 2400L
#define MAXBAUD 115200L
#define FOSC 11059200L //主控芯片工作頻率
#define BR(n) (65536 - FOSC/4/(n)) //主控芯片串口波特率計算公式
#define T1MS (65536 - FOSC/1000) //主控芯片1ms定時初值
#define FUSER 24000000L //15系列目標芯片工作頻率
#define RL(n) (65536 - FUSER/4/(n)) //15系列目標芯片串口波特率計算公式
//SFR定義
sfr AUXR = 0x8e;
//變量定義
BOOL f1ms; //1ms標志位
BOOL UartBusy; //串口發送忙標志位
BOOL UartReceived; //串口數據接收完成標志位
BYTE UartRecvStep; //串口數據接收控制
BYTE TimeOut; //串口通訊超時計數器
BYTE xdata TxBuffer[256]; //串口數據發送緩沖區
BYTE xdata RxBuffer[256]; //串口數據接收緩沖區
char code DEMO[256]; //演示代碼數據
//函數聲明
void Initial(void);
void DelayXms(WORD x);
BYTE UartSend(BYTE dat);
void CommInit(void);
void CommSend(BYTE size);
BOOL Download(BYTE *pdat, long size);
//主函數入口
void main(void)
{
while (1)
{
Initial();
if (Download(DEMO, 0x0100))
{
//下載成功
P3 = 0xff;
DelayXms(500);
P3 = 0x00;
DelayXms(500);
P3 = 0xff;
DelayXms(500);
P3 = 0x00;
DelayXms(500);
P3 = 0xff;
DelayXms(500);
P3 = 0x00;
DelayXms(500);
P3 = 0xff;
}
else
{
//下載失敗
P3 = 0xff;
DelayXms(500);
P3 = 0xf3;
DelayXms(500);
P3 = 0xff;
DelayXms(500);
P3 = 0xf3;
DelayXms(500);
P3 = 0xff;
DelayXms(500);
P3 = 0xf3;
DelayXms(500);
P3 = 0xff;
}
}
}
//1ms定時器中斷服務程序
void tm0(void) interrupt 1 using 1
{
static BYTE Counter100;
f1ms = TRUE;
if (Counter100-- == 0)
{
Counter100 = 100;
if (TimeOut) TimeOut--;
}
}
//串口中斷服務程序
void uart(void) interrupt 4 using 1
{
static WORD RecvSum;
static BYTE RecvIndex;
static BYTE RecvCount;
BYTE dat;
if (TI)
{
TI = 0;
UartBusy = FALSE;
}
if (RI)
{
RI = 0;
dat = SBUF;
switch (UartRecvStep)
{
case 1:
if (dat != 0xb9) goto L_CheckFirst;
UartRecvStep++;
break;
case 2:
if (dat != 0x68) goto L_CheckFirst;
UartRecvStep++;
break;
case 3:
if (dat != 0x00) goto L_CheckFirst;
UartRecvStep++;
break;
case 4:
RecvSum = 0x68 + dat;
RecvCount = dat - 6;
RecvIndex = 0;
UartRecvStep++;
break;
case 5:
RecvSum += dat;
RxBuffer[RecvIndex++] = dat;
if (RecvIndex == RecvCount) UartRecvStep++;
break;
case 6:
if (dat != HIBYTE(RecvSum)) goto L_CheckFirst;
UartRecvStep++;
break;
case 7:
if (dat != LOBYTE(RecvSum)) goto L_CheckFirst;
UartRecvStep++;
break;
case 8:
if (dat != 0x16) goto L_CheckFirst;
UartReceived = TRUE;
UartRecvStep++;
break;
L_CheckFirst:
case 0:
default:
CommInit();
UartRecvStep = (dat == 0x46 ? 1 : 0);
break;
}
}
}
//系統初始化
void Initial(void)
{
UartBusy = FALSE;
SCON = 0xd0; //串口數據模式必須為8位數據+1位偶檢驗
AUXR = 0xc0;
TMOD = 0x00;
TH0 = HIBYTE(T1MS);
TL0 = LOBYTE(T1MS);
TR0 = 1;
TH1 = HIBYTE(BR(MINBAUD));
TL1 = LOBYTE(BR(MINBAUD));
TR1 = 1;
ET0 = 1;
ES = 1;
EA = 1;
}
//Xms延時程序
void DelayXms(WORD x)
{
do
{
f1ms = FALSE;
while (!f1ms);
} while (x--);
}
//串口數據發送程序
BYTE UartSend(BYTE dat)
{
while (UartBusy);
UartBusy = TRUE;
ACC = dat;
TB8 = P;
SBUF = ACC;
return dat;
}
//串口通訊初始化
void CommInit(void)
{
UartRecvStep = 0;
TimeOut = 20;
UartReceived = FALSE;
}
//發送串口通訊數據包
void CommSend(BYTE size)
{
WORD sum;
BYTE i;
UartSend(0x46);
UartSend(0xb9);
UartSend(0x6a);
UartSend(0x00);
sum = size + 6 + 0x6a;
UartSend(size + 6);
for (i=0; i
{
sum += UartSend(TxBuffer[i]);
}
UartSend(HIBYTE(sum));
UartSend(LOBYTE(sum));
UartSend(0x16);
while (UartBusy);
CommInit();
}
//對STC15系列的芯片進行數據下載程序
BOOL Download(BYTE *pdat, long size)
{
BYTE arg;
BYTE cnt;
WORD addr;
//握手
CommInit();
while (1)
{
if (UartRecvStep == 0)
{
UartSend(0x7f);
DelayXms(10);
}
if (UartReceived)
{
arg = RxBuffer[4];
if (RxBuffer[0] == 0x50) break;
return FALSE;
}
}
//設置參數
TxBuffer[0] = 0x01;
TxBuffer[1] = arg;
TxBuffer[2] = 0x40;
TxBuffer[3] = HIBYTE(RL(MAXBAUD));
TxBuffer[4] = LOBYTE(RL(MAXBAUD));
TxBuffer[5] = 0x00;
TxBuffer[6] = 0x00;
TxBuffer[7] = 0xc3;
CommSend(8);
while (1)
{
if (TimeOut == 0) return FALSE;
if (UartReceived)
{
if (RxBuffer[0] == 0x01) break;
return FALSE;
}
}
//準備
TH1 = HIBYTE(BR(MAXBAUD));
TL1 = LOBYTE(BR(MAXBAUD));
DelayXms(10);
TxBuffer[0] = 0x05;
CommSend(1);
while (1)
{
if (TimeOut == 0) return FALSE;
if (UartReceived)
{
if (RxBuffer[0] == 0x05) break;
return FALSE;
}
}
//擦除
DelayXms(10);
TxBuffer[0] = 0x03;
TxBuffer[1] = 0x00;
CommSend(2);
TimeOut = 100;
while (1)
{
if (TimeOut == 0) return FALSE;
if (UartReceived)
{
if (RxBuffer[0] == 0x03) break;
return FALSE;
}
}
//寫用戶代碼
DelayXms(10);
addr = 0;
TxBuffer[0] = 0x22;
while (addr < size)
{
TxBuffer[1] = HIBYTE(addr);
TxBuffer[2] = LOBYTE(addr);
cnt = 0;
while (addr < size)
{
TxBuffer[cnt+3] = pdat[addr];
addr++;
cnt++;
if (cnt >= 128) break;
}
CommSend(cnt + 3);
while (1)
{
if (TimeOut == 0) return FALSE;
if (UartReceived)
{
if ((RxBuffer[0] == 0x02) && (RxBuffer[1] == 'T')) break;
return FALSE;
}
}
TxBuffer[0] = 0x02;
}
//寫硬件選項(如果不需要修改硬件選項,此步驟可直接跳過)
DelayXms(10);
for (cnt=0; cnt<128; cnt++)
{
TxBuffer[cnt] = 0xff;
}
TxBuffer[0] = 0x04;
TxBuffer[1] = 0x00;
TxBuffer[2] = 0x00;
TxBuffer[34] = 0xfd;
TxBuffer[62] = arg;
TxBuffer[63] = 0x7f;
TxBuffer[64] = 0xf7;
TxBuffer[65] = 0x7b;
TxBuffer[66] = 0x1f;
CommSend(67);
while (1)
{
if (TimeOut == 0) return FALSE;
if (UartReceived)
{
if ((RxBuffer[0] == 0x04) && (RxBuffer[1] == 'T')) break;
return FALSE;
}
}
//下載完成
return TRUE;
}
char code DEMO[256] =
{
0x02,0x00,0x5E,0x12,0x00,0x4B,0x75,0xB0,
0xEF,0x12,0x00,0x2C,0x75,0xB0,0xDF,0x12,
0x00,0x2C,0x75,0xB0,0xFE,0x12,0x00,0x2C,
0x75,0xB0,0xFD,0x12,0x00,0x2C,0x75,0xB0,
0xFB,0x12,0x00,0x2C,0x75,0xB0,0xF7,0x12,
0x00,0x2C,0x80,0xDA,0xE4,0xFF,0xFE,0xE4,
0xFD,0xFC,0x0D,0xBD,0x00,0x01,0x0C,0xBC,
0x01,0xF8,0xBD,0xF4,0xF5,0x0F,0xBF,0x00,
0x01,0x0E,0xBE,0x03,0xEA,0xBF,0xE8,0xE7,
0x02,0x00,0x4B,0x75,0x80,0xFF,0x75,0x90,
0xFF,0x75,0xA0,0xFF,0x75,0xB0,0xFF,0x75,
0xC0,0xFF,0x75,0xC8,0xFF,0x22,0x78,0x7F,
0xE4,0xF6,0xD8,0xFD,0x75,0x81,0x07,0x02,
0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};