2 # Config for using Raspberry Pi's expansion header
4 # This is best used with a fast enough buffer but also
5 # is suitable for direct connection if the target voltage
6 # matches RPi's 3.3V and the cable is short enough.
8 # Do not forget the GND connection, pin 6 of the expansion header.
11 adapter driver bcm2835gpio
13 bcm2835gpio_peripheral_base 0x3F000000
15 # Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
16 # These depend on system clock, calibrated for stock 700MHz
17 # bcm2835gpio_speed SPEED_COEFF SPEED_OFFSET
18 bcm2835gpio_speed_coeffs 146203 36
20 # Each of the SWD lines need a gpio number set: swclk swdio
21 # swd gpio pins swclk swio
22 bcm2835gpio_swd_nums 27 17
24 # If you define trst or srst, use appropriate reset_config
25 # Header pin numbers: TRST - 26, SRST - 18
27 #bcm2835gpio_trst_num 22
28 #reset_config trst_only
30 bcm2835gpio_srst_num 22
31 # reset_config srst_only srst_push_pull
33 # or if you have both connected,
34 # reset_config trst_and_srst srst_push_pull
39 ## test which chip this is
40 #swd newdap chip cpu -enable
41 #dap create chip.dap -chain-position chip.cpu
42 #target create chip.cpu cortex_m -dap chip.dap