Talk with serial

Using a dumb terminal (minicom) 115200 board No parity 8 bits 1 stop bit, no flow control (might have to exit minicom and start again for the flow control setting to take). What you type on the dumb terminal comes back.

chmod 666 /dev/ttyUSB0

picocom /dev/ttyUSB0 --baud 115200 --parity n --databits 8 --stopbits 1 --flow n

Note

• UART code based on https://github.com/dwelch67/raspberrypi/tree/master/uart02

• Line editing based on https://github.com/antirez/linenoise

Plan

raspberry side:

• static implementation
• numbers
• arithmetics

client side:

• <termios.h> musl

tcsetattr

• <unistd.h> musl

write
read
STDIN_FILENO
STDOUT_FILENO

• <stdio.h> implement/delete!?

printf
snprintf

• <string.h> musl

strlen
strcat
strncpy
strcmp