| ??? 03/24/07 11:19 Read: times |
#135766 - Serial data Responding to: ???'s previous message |
Ahmet Yorukoglu said:
Secondly, I know my keyboard generate a serial data, and also my keyboard clock is connected to the port3.2 which is external interrupt and catch the fallign edge?
I cant solve the problem... Each clock pulse identifies one bit of serial data. So, each time your ISR is called, you need to read that one bit of data, and add it to the bits already received. After 8 bits, you will have collected a complete byte! Hint: think about how a shift-register works... |
| Topic | Author | Date |
| catching the keyboard clock pulses | 01/01/70 00:00 | |
| More information | 01/01/70 00:00 | |
| more information | 01/01/70 00:00 | |
| Too long in the ISR?? | 01/01/70 00:00 | |
| short ISR | 01/01/70 00:00 | |
| Serial data | 01/01/70 00:00 | |
| clock rate | 01/01/70 00:00 | |
| better, but not good enough | 01/01/70 00:00 | |
| keyboard clock & system clock | 01/01/70 00:00 | |
| Inefficient code! | 01/01/70 00:00 | |
| send an e-mail to | 01/01/70 00:00 | |
| And many, many more | 01/01/70 00:00 | |
AN434 code | 01/01/70 00:00 |