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Jody
Joined: 08 Sep 2006 Posts: 182
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fprintf and usb_cdc_putc stream |
Posted: Tue Aug 23, 2022 1:21 am |
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Hello,
What I am trying to do:
Send a string and a variable to the usb.
PIC send and receive single strings.. when using the printf command i.e.: Code: | printf(usb_cdc_putc,"Tel_Temp 1 number :); |
this working ..
but when i do this:
Code: | fprintf(usb_cdc_putc,"Tel_Temp 1 number : %s", tel_temp1); |
the compiler complains: Stream must be a constant in the valid range .
And I don't understand what the problem is..
When I use the same command to a different stream it is fine...
so this goes with no problem: Code: | fprintf(RS232,"Tel_Temp 1 number : %s\n", tel_temp1) |
what am I doing wrong??
Best regards,
Jody |
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Ttelmah
Joined: 11 Mar 2010 Posts: 19451
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Posted: Tue Aug 23, 2022 10:32 am |
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fprint, prints to streams.
usb_cdc_putc, is _not_ a stream. It is a output function for the usb.
You don't want to be using the stream function. Just:
Code: |
printf(usb_cdc_putc,"Tel_Temp 1 number : %s", tel_temp1);
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printf, can write to any output function. |
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