Todd Stellanova tstellanova

This command can be used when the stm32 chip has become nonresponsive. This typically presents when the stlink programmer is responding to commands but can't connect to the MCU under test in order to program it.

Warning: This will wipe EVERYTHING from the MCU.

~/STMicroelectronics/STM32Cube/STM32CubeProgrammer/bin$ ./STM32_Programmer.sh -c port=swd INDEX=0 mode=UR -e ALL

Issue described in ST forum here: https://community.st.com/s/question/0D50X00009ce0vWSAQ/nucleoh743zi-board-and-printf-swo-not-working

void SWD_Init(void)
{
  *(__IO uint32_t*)(0x5C001004) |= 0x00700000; // DBGMCU_CR D3DBGCKEN D1DBGCKEN TRACECLKEN
 
  //UNLOCK FUNNEL
  *(__IO uint32_t*)(0x5C004FB0) = 0xC5ACCE55; // SWTF_LAR

For UEFI boot, press e when it says “Start Linux/Ubuntu”. Find the line that says quiet splash Right after that, add nomodeset and then press F10 to boot (or whatever key it instructs you to press). It should boot Linux now with no graphics drivers, which appears to be the problem.

brew install lrzsz

	/// Enables ITM
	///
	/// If swo_enable is true, then the SWO output pin will be enabled
	fn low_level_itm(dbgmcu: &stm32::DBGMCU, swo_enable: bool) {
	// ARMv7-M DEMCR: Set TRCENA. Enables DWT and ITM units
	unsafe { (0xE000_EDFC as mut u32) \|= 1 << 24 };

	// Ensure debug blocks are clocked before interacting with them
	dbgmcu.cr.modify(\|_, w\| {
	w.d1dbgcken()

	use core::ptr;


	fn swo_init(cp: &mut Peripherals) {
	const SYSCLOCK_FREQ_HZ: u32 = 64000000;
	//TODO use locks.sysclk().0 instead ?
	const SWO_FREQ_HZ: u32 = 2000000; // 2_000_000; // let swo_freq = 2_000_000;

	unsafe {
	// enable TPIU and ITM

	#!/usr/bin/env python3

	"""
	# STM32H7 SWO Output Solution
	Author: Brian Khuu 2020
	Main Copy: https://gist.github.com/mofosyne/178ad947fdff0f357eb0e03a42bcef5c

	This generates codes that enables SWO output for STM32H7 and was tested on NUCLEO-H743ZI2.
	This is required because stm32h7 changed the registers that OpenOCD expects for SWO output.
	Best to use 400Mhz, tried lower... but had issue with getting stable uart output

	#!/bin/bash

	# allow ssh to this box
	sudo apt-get install openssh-server

	# Gazebo simulator
	sudo apt-get install protobuf-compiler libeigen3-dev libopencv-dev -y
	sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
	## Setup keys
	wget http://packages.osrfoundation.org/gazebo.key -O - \| sudo apt-key add -


	Warning: osrf/simulation/gazebo9 dependency gcc was built with a different C++ standard
	library (libstdc++ from clang). This may cause problems at runtime.
	🍺 /usr/local/Cellar/gazebo9/9.11.0: 1,260 files, 126.5MB
	==> Installing px4/px4/px4-sim
	==> Downloading https://raw.githubusercontent.com/PX4/Firmware/master/Tools/px4.py
	Already downloaded: /Users/todd/Library/Caches/Homebrew/downloads/7be7daca52fab83c40ed326bdcf732c0060cdc0b9d97e0d94f1e71856982d00b--px4.py
	==> PX4 Simulation Installed
	🍺 /usr/local/Cellar/px4-sim/1.6.5.0: 3 files, 10.1KB, built in 5 seconds
	==> Caveats