| Andy Neil 06/26/09 10:25 Read: 220 times Basingstoke Uk |
#166499 - Could you please suggest? Responding to: Giang Ho's previous message |
Do not call printf from any ISR.
printf is a very powerful function; which means that it is very large - exactly what you do not want in an ISR! Also, Keil's standard putchar implementation means that printf does not return until the last character has been transmitted! And printf is not reentrant, so it is highly likely that calls in an ISR will corrupt calls elsewhere in the program - which looks like exactly what you are seeing! So, one more time: Do not call printf from any ISR. Ever. |
| Topic | Author | Date |
| CMP-10 thermal printer & 8051 | Giang Ho | 06/13/09 08:47 |
| Printer settings | Hal Albach | 06/13/09 10:27 |
| Some hints/advice.. | Valentin Angelovski | 06/13/09 11:11 |
| I sent commands like "BEL", or "ESC RS" | Andy Neil | 06/13/09 11:14 |
| ASCII table | Per Westermark | 06/13/09 13:58 |
| HyperTerminal & ASCII code | Giang Ho | 06/13/09 18:56 |
| Would it be realistic.... | Michael Karas | 06/13/09 21:45 |
| Not text, | Per Westermark | 06/14/09 01:54 |
| Not text, | Giang Ho | 06/14/09 03:08 |
| Spend more time with the ASCII table. | Per Westermark | 06/14/09 03:35 |
| Still fail to test the printer | Giang Ho | 06/18/09 07:37 |
| The printer is working | Giang Ho | 06/18/09 09:04 |
| ASCII char on HyperTerminal | Mahesh Joshi | 06/20/09 07:11 |
| Re: ASCII char on HyperTerminal | Giang Ho | 06/21/09 09:16 |
| ASCII char on HyperTerminal | Mahesh Joshi | 06/20/09 07:11 |
| Is that guaranteed? | Andy Neil | 06/20/09 13:15 |
| I use it that way | Mahesh Joshi | 06/22/09 01:28 |
| XOn/XOff set on MCU side | Giang Ho | 06/18/09 22:08 |
| You have to do it yourself | Andy Neil | 06/19/09 01:36 |
| Re:You have to do it yourself | Giang Ho | 06/21/09 08:57 |
| Intern? [edited] | Andy Neil | 06/24/09 03:00 |
| HyperTerminal and microcontroller - please help! | Giang Ho | 06/23/09 10:36 |
| HyperTerminal and microcontroller - please help! | Giang Ho | 06/23/09 19:07 |
| May be I need to use cross over serial cable | Andy Neil | 06/24/09 03:03 |
| Use printf to output to UART, but receive incorrect data | Giang Ho | 06/24/09 10:09 |
| Re: Use printf to output to UART, but receive incorrect dat | Giang Ho | 06/24/09 10:13 |
| printf only can output value from 256 to 32767 correctly | Giang Ho | 06/25/09 07:42 |
| Hasn't Maarten already explained this? | Andy Neil | 06/25/09 07:54 |
| Re: Hasn't Maarten already explained this? | Giang Ho | 06/25/09 08:31 |
| Show it! | Andy Neil | 06/25/09 09:08 |
| Re: Show it | Giang Ho | 06/25/09 19:48 |
| use a cast | Maarten Brock | 06/24/09 16:11 |
| or RTFM | Andy Neil | 06/24/09 17:06 |
| Re: RTFM | Giang Ho | 06/25/09 19:55 |
| I found the solution. Thanks | Giang Ho | 06/26/09 08:46 |
Direct Memory?  | Andy Neil | 06/26/09 09:03 |
| Re: Direct memory | Giang Ho | 06/26/09 09:21 |
| Definitely a BAD Idea! | Andy Neil | 06/26/09 09:43 |
| Re:Definitely a BAD Idea! | Giang Ho | 06/26/09 10:01 |
| Could you please suggest? | Andy Neil | 06/26/09 10:25 |
| Re: Do not call from ISR | Giang Ho | 06/26/09 18:19 |
| I didn't say that | Andy Neil | 06/27/09 03:02 |
Thanks! | Giang Ho | 06/27/09 09:10 |
| Re: use a cast | Giang Ho | 06/24/09 19:47 |