Question on serial debugging

caleyfeli85
Posts: 1
Joined: Thu Jan 21, 2021 10:19 pm

Question on serial debugging

Postby caleyfeli85 » Thu Jan 21, 2021 10:24 pm

Hi folks,

I'm new to esp8266 firmware programming. I'm trying to start off by writing simple programs.

I'm using ubuntu linux with the esp-open-sdk. I can compile and flash simple programs (like blink) but I'm really stumped with printing debugging info to the console via the os_printf() function.

I have a simple user_init() function which includes two function calls.

uart_init(115200,115200);

os_printf("hello world");

I am expecting to see "hello world" printed on /dev/ttyUSB0 when I use the command "cat /dev/ttyUSB0".

I've already used stty to setup the serial port. I have it setup as such: "stty -F /dev/ttyUSB0 raw" and "stty -F /dev/ttyUSB0 115200".

I have my esp8266 wired properly to a ftdi usb to serial converter. Any ideas on what is going on?

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