| ??? 12/28/08 22:28 Read: times |
#161194 - Keil printf disables output ? Responding to: ???'s previous message |
Problem was solved by shifting baudrate generation from T1 to T2.
Now another issue: I have an interrupt several hundert times a second reading and writing external I/O and it works fine. The main program is just supervising stuff and putting it out on UART. New problem - fitting to the headline : when using simple putchar in the main loop there is no problem but when using fprint instead the mentioned I/O interrupt is slowed down significantly. Is printf disabling interrupts during runtime ? As far as I have read printf is also just using putchar so there should be no such problem, right ? Just for comment: I dont care how long printf needs to put stuff out since main things happen in the interrupt. So there is no execution time problem for me using printf, if it wouldnt slow down my I/O interrupt |
| Topic | Author | Date |
| Keil printf disables output ? | 01/01/70 00:00 | |
| Cross post | 01/01/70 00:00 | |
| Keil printf disables output ? | 01/01/70 00:00 | |
| Keil printf disables output ? | 01/01/70 00:00 | |
| Not solved? | 01/01/70 00:00 | |
| printf slows I/O interrupt | 01/01/70 00:00 | |
| unlikely to disable IRQs | 01/01/70 00:00 | |
| you can use your own putchar() function with Keil | 01/01/70 00:00 | |
you can use your own putchar() function with Keil | 01/01/70 00:00 |