| ??? 05/09/06 21:27 Read: times |
#115898 - the trouble is Responding to: ???'s previous message |
Not understood, sorry.Why I can not pop the return add.?
NEG: MOV 32H,#01H MOV 31H,#00H POP DPH POP DPL PUSH 32H PUSH 31H MOV R2,#0FH RETyou can, but the trouble is: 1) you screw up the dptr - yes, you may not use it now, but someday you will and all he.. will break lose and you will have a bug it may take you days to find 2) exiting an ISR with ret will kill all interrupts. 3) using absolute RAM addresses someday all he.. will break lose and you will have a bug it may take you days to find Note: it may seem that 2) is the important issue IT IS NOT. It will not create erratic behaviour and is thus debuggable. erik |
| Topic | Author | Date |
| I'm in trouble with my PWM software | 01/01/70 00:00 | |
| Interrupts ? | 01/01/70 00:00 | |
| Firstly I want to explain how my hardwar | 01/01/70 00:00 | |
| 89C52 | 01/01/70 00:00 | |
| use a uC with a PCA | 01/01/70 00:00 | |
| wiggling with the stack pointer | 01/01/70 00:00 | |
| I know that.... | 01/01/70 00:00 | |
| no you don't | 01/01/70 00:00 | |
| To: Erik | 01/01/70 00:00 | |
| My code | 01/01/70 00:00 | |
| I can't tell | 01/01/70 00:00 | |
| His Code | 01/01/70 00:00 | |
| Nicely formatted | 01/01/70 00:00 | |
| As Erik suggested | 01/01/70 00:00 | |
| not valuable | 01/01/70 00:00 | |
| Hard to understand | 01/01/70 00:00 | |
| asking for? | 01/01/70 00:00 | |
| Weird DNA.... | 01/01/70 00:00 | |
| that does make a difference | 01/01/70 00:00 | |
| Playing with The Stack Pointer | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| ORG 33H | 01/01/70 00:00 | |
| OK | 01/01/70 00:00 | |
| replying to what in the above refer to m | 01/01/70 00:00 | |
| Listen and learn | 01/01/70 00:00 | |
| excellent question | 01/01/70 00:00 | |
| I'm listening and learning | 01/01/70 00:00 | |
| Oops | 01/01/70 00:00 | |
| Rewrite ! | 01/01/70 00:00 | |
| WRONG | 01/01/70 00:00 | |
| Basic methods & specific details | 01/01/70 00:00 | |
| To:Neil | 01/01/70 00:00 | |
| +ve&-ve | 01/01/70 00:00 | |
| totally unnneded information | 01/01/70 00:00 | |
| +ve | 01/01/70 00:00 | |
| Me too | 01/01/70 00:00 | |
| halfway | 01/01/70 00:00 | |
| Just like the first time I saw 3v3 | 01/01/70 00:00 | |
| Mid 70's | 01/01/70 00:00 | |
| the reason | 01/01/70 00:00 | |
| Yes - Very Well Established | 01/01/70 00:00 | |
| the trouble is | 01/01/70 00:00 | |
| Other calls | 01/01/70 00:00 | |
| One thing for the future | 01/01/70 00:00 | |
| I do not see the point | 01/01/70 00:00 | |
| I got bored... | 01/01/70 00:00 | |
| argh, so many nops | 01/01/70 00:00 | |
| NOP | 01/01/70 00:00 | |
| New version | 01/01/70 00:00 | |
| Thanks Steve...and others | 01/01/70 00:00 | |
| NO | 01/01/70 00:00 | |
| I suggest you look at your own changes | 01/01/70 00:00 | |
| His new code | 01/01/70 00:00 | |
| very informative | 01/01/70 00:00 | |
| Another happy customer | 01/01/70 00:00 | |
| Young Double E? | 01/01/70 00:00 | |
| finished | 01/01/70 00:00 | |
the one at which end of the body? | 01/01/70 00:00 |