Hi <!channel> I am facing a issue in using uart. I...
# gfmpw-0-silicona
Abdul Moiz Sheikh
11/05/2023, 3:59 PMHi <!channel> I am facing a issue in using uart. It dose not seem to print "hello world". I have attached the c code that I am using.
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Anish
11/05/2023, 4:00 PMyou can just ask your question without @ channel in the future which pings hundreds of people
Anish
11/05/2023, 4:00 PMsomeone will still respond
Anish
11/05/2023, 4:02 PMand, did you try probing with a logic analyzern or oscilloscope to check the behavior
Anish
11/05/2023, 4:02 PMdon't see anything wrong at first glance
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Egor Lukyanchenko
11/05/2023, 4:07 PMAre you trying to use an external UART adapter connected to pins 5&6 or builtin FTDI in UART mode?
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Abdul Moiz Sheikh
11/05/2023, 4:08 PMbuiltin ftdi in uart mode
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Egor Lukyanchenko
11/05/2023, 4:12 PMIt's more convenient to use an external one with speed 9600 on pin 5 (TX for Caravel, RX for adapter). I had this problem with onboard FTDI also then I was bringing up my chip. If I remember correctly this "Enable UART" stops housekeeping SPI from working.
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Abdul Moiz Sheikh
11/05/2023, 4:16 PMIs there any other way to have the data displayed on the screen of your pc via usb from caravel
Abdul Moiz Sheikh
11/05/2023, 4:17 PMWhenever I have used enable uart without the jumper between enable and uart pins the code works fine.
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Egor Lukyanchenko
11/05/2023, 4:51 PMNo other way I now about. Probably you can write to flash and read it back from PC, but its impractical. On the other hand an external USB-UART is very simple solution and does not require "Enable UART" jumper.
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