I'm having trouble using OpenOCD to flash the firmware on a at91sam7s512 micro-controller.
Whenever I send a halt command (via telnet) it throws the following error:
Halt timed out, wake up GDB.
timed out while waiting for target halted
in procedure 'halt'
The board is a Proxmark3 Easy
Below is the configuration file being used:
# Ports
telnet_port 4444
gdb_port 3333
# Interface
interface buspirate
buspirate_port /dev/ttyUSB0
adapter_khz 1000
# Communication speed
buspirate_speed normal # or fast
# Voltage regulator: enabled = 1 or disabled = 0
buspirate_vreg 1
# Pin mode: normal or open-drain
buspirate_mode normal
# Pull-up state: enabled = 1 or disabled = 0
buspirate_pullup 1
# use combined on interfaces or targets that can't set TRST/SRST separately
reset_config srst_only srst_pulls_trst
jtag newtap sam7x cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id 0x3f0f0f0f
target create sam7x.cpu arm7tdmi -endian little -chain-position sam7x.cpu
sam7x.cpu configure -event reset-init {
soft_reset_halt
mww 0xfffffd00 0xa5000004 # RSTC_CR: Reset peripherals
mww 0xfffffd44 0x00008000 # WDT_MR: disable watchdog
mww 0xfffffd08 0xa5000001 # RSTC_MR enable user reset
mww 0xfffffc20 0x00005001 # CKGR_MOR : enable the main oscillator
sleep 10
mww 0xfffffc2c 0x000b1c02 # CKGR_PLLR: 16MHz * 12/2 = 96MHz
sleep 10
mww 0xfffffc30 0x00000007 # PMC_MCKR : MCK = PLL / 2 = 48 MHz
sleep 10
mww 0xffffff60 0x00480100 # MC_FMR: flash mode (FWS=1,FMCN=72)
sleep 100
}
gdb_memory_map enable
#gdb_breakpoint_override hard
#armv4_5 core_state arm
sam7x.cpu configure -work-area-virt 0 -work-area-phys 0x00200000 -work-area-size 0x10000 -work-area-backup 0
flash bank sam7x512.flash.0 at91sam7 0 0 0 0 sam7x.cpu 0 0 0 0 0 0 0 18432
flash bank sam7x512.flash.1 at91sam7 0 0 0 0 sam7x.cpu 1 0 0 0 0 0 0 18432
What steps can be taken to troubleshoot this
Swap the MISO and MOSI lines. For my Bus Pirate v3 and Proxmark3 Easy the correct connections were:
TMS <-> CS
TDI <-> MOSI
TDO <-> MISO
TCK <-> CLK
GND <-> GND
+3.3 <-> +3.3