CCS/TMS570LC4357: Console only print one line.

Xiangguang feng

Tool/software: Code Composer Studio

I try to use printf() to print out ADC data reading. However there is only one line shown in console window. Here is my code:

printf("ADC Channel 0 data: %i \r\n", *Channel_0_Data);
printf("ADC Temp Sensor data: %i \r\n", *TempSensor_1_Data);

I believe it is very generic. Somehow the console only print the first line. I tried everything still can't figure out what's wrong.

Regards,

over 6 years ago

0 QJ Wang over 6 years ago

TI__Guru**** 200756 points

Hi XG,

Is the code stuck somewhere, so the second printf() is not executed?

0 Xiangguang feng over 6 years ago in reply to QJ Wang

Intellectual 510 points

Hi QJ,

In my code the two printf() lines are next to each other. There is nothing in between. I can't imagine there is anything wrong with the code. I would guess it is related to the console? I can't figure it out.

Regards,

0 Sunil Oak over 6 years ago in reply to Xiangguang feng

TI__Mastermind 49120 points

In general, printf() in an embedded system is not a good idea. It requires a lot of memory (RAM and Flash) and may be easily taking up all your stack for the specific CPU mode you are in. See this wiki page for more information: http://software-dl.ti.com/ccs/esd/documents/sdto_cgt_tips_for_using_printf.html

A better solution is to use a serial port to output data for viewing on the PC via a terminal emulator. CCS even includes a terminal emulator in case you don't have another one that you like (e.g. Tera Term). There are also several examples you can find online that can walk you through redirecting a printf statement to the serial output. This thread gives a very simple example for how to do this on Hercules MCUs:

https://e2e.ti.com/support/microcontrollers/hercules/f/312/t/153127

Regards,

Sunil

Arm-based microcontrollers

Arm-based microcontrollers forum

CCS/TMS570LC4357: Console only print one line.