| ??? 05/12/05 21:21 Read: times |
#93359 - re:what is this. Responding to: ???'s previous message |
Erik Malund said:
Addr;
Data; what is this ? this is to stop the compiler from complaining about this variables not being used. Erik Malund said:
while(EECON & 1){}; //check the EEBUSY bit EECON=2; _asm mov acc,b movx @dptr,a what is in dptr ??? what is in b ??? you do not know! You are making assumptions about the compiler which you cant I am basing some of my info of this: "SDCC passes the input parameter in DPL. It actually uses DPL, DPH, B and A, in that order, for 8, 16 and 32 bit parameters. This function has a "void" return, but DPL, DPH, B and A are also used when there is a return value. Normally, SDCC assumes that any function it calls will use R0 through R7, so these is no need to save these registers before writing into them. " -http://www.pjrc.com/tech/8051..._sdcc.html I don't use the _asm statement very much, so go easy on me. Erik Malund said:
should you not disable interrupts?
Your are right about the interrupts, I forget to do that after changing my code. |
| Topic | Author | Date |
| AT89c51ED2 EEPROM problem. | 01/01/70 00:00 | |
| what is this | 01/01/70 00:00 | |
| re:what is this. | 01/01/70 00:00 | |
| Also Tried | 01/01/70 00:00 | |
So.. | 01/01/70 00:00 |