![]() Although frequency of mini-UART can fixed by adding gpu_freq = 250 or 500, in the config.txt. The PL011 UART on the other hand, has a fixed fixed frequency which doesnt change. This makes the mini UART unstable which may lead to data loss or corruption. Mini UART uses the frequency which is linked to the core frequency of GPU, so whenever the GPU frequency changes, UART baud rate changes too. We'll be using PL011 instead of the primary mini-UART because of the following reason: Raspberry Pi has two in-built UART which are as follows: Although keep in mind, that this module doesn't have a DTR pin but a little hack, you can add one. ![]() You can get it for around ~$2 on Aliexpress or your local electronic shop. Setting up Serial connection using CH340G USB to TTL moduleĬH340G is a cheap USB to TTL module which support baud rate from 50 to 2000000 bps. GDB, prefrebably the aarch64-none-elf-gdb gdb.OpenOCD for accessing target and interfaces.Minicom, picocom, tio, screen or any other terminal emulator which can access serial devices.USB extension if you don't have many USB port.CH340G module or any other serial capable module.Be sure to follow every line or you might end in problem ) Pre-requisite Material Hardwares On today's blog, I'll tell you about how to setup JTAG + Serial connection on the Raspberry pi 4B and configure OpenOCD to debug the RPi4b.
0 Comments
Leave a Reply. |