Printf problem

vu2iti · Joined: 02 Sep 2006 Posts: 4

I have recently updated my CCS compiler to version 4.127. Now I have a strange problem. My printf is not working for texts. Variables are sent through the serial port but text messages are not at all printed.
For example,
the Statement : printf("THE ADC VALUE IS %u",adval); will only print the value of the variable, not the text.

This printf statement is working fine with versions 4.094 or lower.
Please help.

temtronic · Posted: Mon Dec 05, 2011 6:07 am

Which PIC are you testing on ?
PIC16F877 and PIC18F4550 work fine under v4.114 for me.

labviewman · Joined: 05 Dec 2011 Posts: 11

I had the same problem...printf code that worked fine in 4.125 didn't in 4.127 (didn't like %lX but was OK with %ld). I reverted back to 4.125

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Neither one of you posted your PIC, so there is no way for us (forum
members) to verify your problem.

labviewman · Joined: 05 Dec 2011 Posts: 11

Pretty simple:

int16 data;

Printf("%lx\r",data);

There were other issues with 4.127 which caused me to burn an entire day (Sunday) trying to make my code work with 4.127 which worked fine the previous night with 4.125.

The following Monday, I talked to tech support who sent me 4.125 (I had done the update, not download, which I will never again), and the broken parts of the code worked again.

We use CCS at my day job (yes, I bought my own license for home) where the engineers regularly keep older versions of the compiler just in case an update breaks their code. Unfortunately, the updates frequently caused problems. Yes, every compiler has problems, but wow, breaking printf??

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

dyeatman · Joined: 06 Sep 2003 Posts: 1934 Location: Norman, OK

The problem does not seem to exist in 4.128 with the 18F4685.
I just recompiled a program originally built with 4.114 using 4.128 and
there are no problems.
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starter · Joined: 14 Dec 2011 Posts: 3

printf(usb_cdc_putc, "%lu", value); //if through usb
printf(lcd_putc, "%lu",value);//if in LCD