Hi This is code compiled with Keil C, but not working #include <AT89X51.H> xdata char Index _at_ 0x00; void Clear_DDRAM(char index); void main(void) { Clear_DDRAM(0x00); while(1); } void Clear_DDRAM(char index) { int a; for(a=0;a<65536;a++) { P3_4=0; //IOCS=0; P3_1=0; P3_0=0; P1_0=0; //Reset=0; Index=index; P3_4=1; //IOCS=1; Index=Index+a; } } The xdata has 64K address range. Here is my queation: How to series to write data(0x00) into next address(Star address at 0x00). The assembly code is "INC DPTR" so have any instruction like it in keil C.
Mark, Sure, but I don't know if this is just a learning sort of test case for him and he wants to actually do something else in practice. For instance, maybe he wants to change the function to write a pattern to memory or something. Who knows?