32Blit OpenOCD VS Code

32blit.cfg

# 32blit configuration - modified from nucleo-h743zi.cfg

source [find interface/stlink.cfg]

transport select hla_swd

set CHIPNAME stm32h750vbz

# enable stmqspi
if {![info exists QUADSPI]} {
	set QUADSPI 1
}

source [find target/stm32h7x.cfg]

#reset_config srst_only srst_nogate connect_assert_srst

# QUADSPI initialization
# qpi: 4-line mode
proc qspi_init {} {

	# Clock set up

	mmw 0x580244E0 0x000007FF 0				;# RCC_AHB4ENR |= GPIOA-GPIOK (enable clocks)
	mmw 0x580244D4 0x00004000 0				;# RCC_AHB3ENR |= QSPIEN (enable clock)
	sleep 1									;# Wait for clock startup

	# Pin muxing set up for 32blit
	# See https://github.com/pimoroni/32blit-beta/blob/e2d2705ba7ccaf257b3f5cdfc2b42f8e2ab8a173/32blit-stm32/Src/gpio.cpp#L38

	# PB02: CLK, PC11: BK2_NCS, PE07: BK2_IO0, PE08: BK2_IO1, PE09: BK2_IO2, PE10: BK2_IO3

	# Note: The HAL initializes all QSPI pin speeds as GPIO_SPEED_FREQ_LOW (this is the minimum speed). OpenOCD likes to make
	#       them GPIO_SPEED_FREQ_VERY_HIGH which is the maximum. I am not sure why. This is the only change from HAL init.

	# Port B: PB02:AF09:V
	mmw 0x58020400 0x00000020 0x00000010			;# GPIOB_MODER: MODER2=2 (GPIO_MODE_AF_PP)
	mmw 0x58020408 0x00000030 0x00000000			;# GPIOB_OSPEEDR: OSPEED2=3 (GPIO_SPEED_FREQ_VERY_HIGH)
	mmw 0x5802040C 0x00000000 0x00000030			;# GPIOB_PUPDR: PUPDR2=0 (NOPULL)
	mmw 0x58020420 0x00000900 0x00000600			;# GPIOB_AFRL: AFSEL2=9

	# Port C: PC11:AF09:V
	mmw 0x58020800 0x00800000 0x00400000			;# GPIOC_MODER: MODER11=2 (GPIO_MODE_AF_PP)
	mmw 0x58020808 0x00C00000 0x00000000			;# GPIOC_OSPEEDR: OSPEED11=3 (GPIO_SPEED_FREQ_VERY_HIGH)
	mmw 0x5802080C 0x00000000 0x00C00000			;# GPIOC_PUPDR: PUPDR11=0 (NOPULL)
	mmw 0x58020824 0x00009000 0x00006000			;# GPIOC_AFRH: AFSEL11=9

	# Port E: PE10:AF10:V, PE09:AF10:V, PE08:AF10:V, PE07:AF10:V
	mmw 0x58021000 0x002A8000 0x00154000			;# GPIOE_MODER: MODER7=2, MODER8=2, MODER9=2, MODER10=2 (GPIO_MODE_AF_PP)
	mmw 0x58021008 0x003FC000 0x00000000			;# GPIOC_OSPEEDR: OSPEED7=3, OSPEED8=3, OSPEED9=3, OSPEED10=3 (GPIO_SPEED_FREQ_VERY_HIGH)
	mmw 0x5802100C 0x00000000 0x003FC000			;# GPIOE_PUPDR: PUPDR7=0, PUPDR8=0, PUPDR9=0, PUPDR10=0 (NOPULL)
	mmw 0x58021020 0xA0000000 0x50000000			;# GPIOE_AFRL: AFSEL7=10
	mmw 0x58021024 0x00000AAA 0x00000555			;# GPIOE_AFRH: AFSEL8=10, AFSEL9=10, AFSEL10=10

	# Flash set up - 32blit uses flash 2 only
	# flash2 'micron n25q256 3v' id = 0x19ba20 size = 32768kbytes
	# Full part number is: MT25QL256ABA1EW7

	# correct FSIZE is 0x18 or 0x19, however, this causes trouble when
	# reading the last word at end of bank in *memory mapped* mode

	mww 0x52005000 0x05500090				;# QUADSPI_CR: PRESCALER=5, APMS=1, FTHRES=0, FSEL=1, DFM=0, SSHIFT=0, TCEN=1
	mww 0x52005004 0x00180100				;# QUADSPI_DCR: FSIZE=0x18, CSHT=0x01, CKMODE=0

	mww 0x52005030 0x00001000				;# QUADSPI_LPTR: deactivate CS after 4096 clocks when FIFO is full
	mww 0x52005014 0x0D002503				;# QUADSPI_CCR: FMODE=0x3, DMODE=0x1, DCYC=0x0, ADSIZE=0x3, ADMODE=0x1, IMODE=0x1
	mmw 0x52005000 0x00000001 0				;# QUADSPI_CR: EN=1

	# Exit QPI mode
	mww 0x52005014 0x000003FF				;# QUADSPI_CCR: FMODE=0x0, DMODE=0x0, DCYC=0x0, ADSIZE=0x0, ADMODE=0x0, IMODE=0x3, INSTR=Exit QPI
	sleep 1

	# Enter 4-byte mode
	mww 0x52005014 0x000001B7				;# QUADSPI_CCR: FMODE=0x0, DMODE=0x0, DCYC=0x0, ADSIZE=0x0, ADMODE=0x0, IMODE=0x1, INSTR=Enter 4-byte
	sleep 1

	# 32blit only works in this mode
	# memory-mapped read mode with 4-byte addresses
	mww 0x52005014 0x0D003503				;# QUADSPI_CCR: FMODE=0x3, DMODE=0x1, DCYC=0x0, ADSIZE=0x3, ADMODE=0x1, IMODE=0x1, INSTR=READ
}

$_CHIPNAME.cpu0 configure -event reset-init {
	global QUADSPI

	if { $QUADSPI } {
		qspi_init
	}
}

readme.md

Requires OpenOCD git. Config is from here https://github.com/ali1234/openocd/commit/4f7d462db204f786971bb95de78137074764fe39, modified to work with the merged QUADSPI patch.

launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "(arm gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            "program": "${command:cmake.launchTargetPath}",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "miDebuggerPath": "/usr/bin/gdb-multiarch",
            "debugServerPath": "/home/daftfreak/.local/bin/openocd",
            "debugServerArgs": "-f board/32blit.cfg -c init -c \"reset init\"",
            "filterStderr": true,
            "serverStarted": "target halted due to debug-request, current mode: Thread ",
            "setupCommands": [
                { "text": "-target-select remote localhost:3333", "description": "connect to target", "ignoreFailures": false },
                { "text": "-file-exec-and-symbols ${command:cmake.launchTargetPath}", "description": "load file", "ignoreFailures": false},
                { "text": "-interpreter-exec console \"monitor reset\"", "ignoreFailures": false },
                { "text": "-interpreter-exec console \"monitor halt\"", "ignoreFailures": false },
                { "text": "-target-download", "description": "flash target", "ignoreFailures": false },
                //{ "text": "-interpreter-exec console \"monitor reset\"", "ignoreFailures": false }, //?
            ]
        }
    ]
}