| ??? 07/04/07 07:07 Read: times |
#141476 - How to generate 100 Khz square wave 80C51 |
Hi,
I want to generate 100 Khz square wave output from the 80c51 using the crystal 11.059 Mhz. But i am able to generate only 50 khz maximum, can you correct my code for making 100 Khz void main(void) { TMOD = 0x20; TH1 = 0xFD; SCON = 0x50; // for serial communication EA = 1; TR1 = 1; TMOD=0x01; TL0=0xFD; // TL0 Reload value TH0=0xFF; // TH0 Reload value 50 Khz ET0=1; TR0=1; // Start Timer0 EA=1; while(1) { } } void timer0() interrupt 1 // interrupt address is 0x000b { TF0 = 0; // reset interrupt flag P0_1 = ~P0_1; // P3.4 toggle when interrupt. TL0=0xFD; // TL0 Reload value TH0=0xFF; // TH0 Reload value 50 Khz } Please help me Thanks |
| Topic | Author | Date |
| How to generate 100 Khz square wave 80C51 | 01/01/70 00:00 | |
| Tips | 01/01/70 00:00 | |
| 1 KHz | 01/01/70 00:00 | |
| that's ... | 01/01/70 00:00 | |
| SI Units | 01/01/70 00:00 | |
| 1024 = Ki | 01/01/70 00:00 | |
| C interrupt overhead | 01/01/70 00:00 | |
| RE: C interrupt overhead | 01/01/70 00:00 | |
| and listen to the guru! :-) | 01/01/70 00:00 | |
| several reasons | 01/01/70 00:00 | |
| Yet another reason to avoid using HLL's! | 01/01/70 00:00 | |
| Optimizations | 01/01/70 00:00 | |
| Use Timer0 auo reload | 01/01/70 00:00 | |
| using | 01/01/70 00:00 | |
| interrupt vectoring vs. latency | 01/01/70 00:00 | |
| Then the Interupt must be in ASM | 01/01/70 00:00 | |
| do you mean... | 01/01/70 00:00 | |
| No | 01/01/70 00:00 | |
| Compiler generated IRQ vectors | 01/01/70 00:00 | |
| OOPS we both meant LJMP REALisr | 01/01/70 00:00 | |
| the original problem... | 01/01/70 00:00 | |
| Interrupt Latency + Vectoring + Service | 01/01/70 00:00 | |
| indufficient info | 01/01/70 00:00 | |
use MCS52 better option | 01/01/70 00:00 |