| ??? 03/06/05 14:39 Read: times |
#89192 - Possibilities Responding to: ???'s previous message |
There are a few problems that can arise when using Keil C51 (and other) printf() routines. Firstly printf() is genuinely stack intensive and falls over if you try to pass it too many variables and pointers. This is particularly noticeable when compiling for the small memory model.
ie printf("lots of constant info %d, 5); // should work printf("lots of constant info %d ,%d, %d, 5, 6, 7); // doesn't The second (illustrative) example leads to unpredictable results. Also, genuinely stack intensive functions tend to fall over a bit when stack space gets lowish. I would tend to think that your LCD driver is pushing you over the limit, and that it's time to shift some variables out to idata or beyond. Maybe that's a help...maybe not. Have a peek at my LCD code if you think that will narrow it down some also. http://www.iinet.net.au/~vanluynm Regards, Murray R. Van Luyn. |
| Topic | Author | Date |
| LCD< | 01/01/70 00:00 | |
| must be a bug in lcd_write() | 01/01/70 00:00 | |
| no bug | 01/01/70 00:00 | |
| Bug in lcd_write | 01/01/70 00:00 | |
| Another test | 01/01/70 00:00 | |
| Not quite | 01/01/70 00:00 | |
| Stand corrected | 01/01/70 00:00 | |
| further corrected | 01/01/70 00:00 | |
| Makes sense | 01/01/70 00:00 | |
| Delay after the character write? | 01/01/70 00:00 | |
| unknown bug | 01/01/70 00:00 | |
| ANSI divergence | 01/01/70 00:00 | |
| Are you sure? | 01/01/70 00:00 | |
| skdjfhg | 01/01/70 00:00 | |
| It realy works fine with UART | 01/01/70 00:00 | |
| Story so far | 01/01/70 00:00 | |
| Keil and Function pointers? | 01/01/70 00:00 | |
| Simulator | 01/01/70 00:00 | |
| Kaiwalya - O.T | 01/01/70 00:00 | |
| Let me try | 01/01/70 00:00 | |
| Post the real code | 01/01/70 00:00 | |
| Possibilities | 01/01/70 00:00 | |
| ksfd | 01/01/70 00:00 | |
| Troll | 01/01/70 00:00 | |
| the real issue | 01/01/70 00:00 | |
| Corrections | 01/01/70 00:00 | |
| Small but fast | 01/01/70 00:00 | |
| MIPS | 01/01/70 00:00 | |
| Corrections | 01/01/70 00:00 | |
| sldkjf | 01/01/70 00:00 | |
| dkfuhg | 01/01/70 00:00 | |
| Corrections | 01/01/70 00:00 | |
| Corrections | 01/01/70 00:00 | |
| got curious and looked | 01/01/70 00:00 | |
| I'm wrong - Damn! | 01/01/70 00:00 | |
| debugging | 01/01/70 00:00 | |
| Post you real code | 01/01/70 00:00 | |
How to initilize 4X20 LCD | 01/01/70 00:00 |