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Hi, 1. In my programme,there are some loop states such as the following: int x,x1,x2; x1=1;x2=100; for(x=x1;x<=x2;x++) { y=k*x+b; Pixel(x, y, Mode); } But in fact,the loop is executed only once,then run the wrong code and the code after the loop is never executed.can you give me some advices? 2.In my programme, there is a multi-dimension array like this-- unsigned char code HZTable[2][16]={....}; But the operation to the array always goes wrong.how can I resolve the problem? thanks Liu *** huihl@163.com
target board drawings: http://www.redrival.com/huiease/target_1.jpg http://www.redrival.com/huiease/target2.jpg http://www.redrival.com/huiease/target3.jpg
the following code always goes wrong. void ShowHZ(unsigned char lin,unsigned char column,unsigned int hzcode) { unsigned char i; unsigned int StartAddr; StartAddr=lin*LineChar + column; //定位起始行 for(i=0;i<16;i++) { OutPortCom3( (unsigned char)(StartAddr), (unsigned char)(StartAddr>>8), 0x24); OutPortCom2( HZTable[hzcode][i*2], 0xc0); //左半部 地址加一 OutPortCom2( HZTable[hzcode][i*2+1], 0xc4); //右半部 字模地址加一 StartAddr=StartAddr + LineChar; } } But I adapt the array operation HZTable[hzcode][i*2] and HZTable[hzcode][i*2+1] to HZTable[0][i*2] and HZTable[0][i*2]. the programme can run well.(can show the 1st double-byted word). why?
Excuse me but in your schematics 1 and 3 there is no pull up in the P0 port ?? In the Atmel datasheet page 3 , all port have pull up EXCEPT the P0, so you may encounter sevreal problem il you doesn't put some resistors... Sincerely C.GRUN