OpenOCD Configuration for Raspberry Pi 4

raspberrypi4-native.cfg

interface bcm2835gpio

bcm2835gpio_peripheral_base 0xFE000000

# Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
# These depend on system clock, calibrated for stock 700MHz
# bcm2835gpio_speed SPEED_COEFF SPEED_OFFSET
bcm2835gpio_speed_coeffs 236181 60

# Each of the JTAG lines need a gpio number set: tck tms tdi tdo
# Header pin numbers: 23 22 19 21
bcm2835gpio_jtag_nums 11 25 10 9

# Each of the SWD lines need a gpio number set: swclk swdio
# Header pin numbers: 23 22
bcm2835gpio_swd_nums 11 25

# If you define trst or srst, use appropriate reset_config
# Original header pin numbers: TRST - 26, SRST - 18

# bcm2835gpio_trst_num 7
# reset_config trst_only

# bcm2835gpio_srst_num 18
# reset_config srst_only srst_push_pull

# or if you have both connected,
# reset_config trst_and_srst srst_push_pull