pikapython/port/qemu/openocd

SETTING UP OPENOCD AND THE JTAG PROGRAMMER
This depends heavily on what operating system you are using.  If you do an
Internet search, you should be able to find many examples.


CONNECTING TO BOARD:
Notes:
- If you want to view the OpenOCD configuration scripts, they are installed in
  /usr/local/share/openocd/scripts
- When I first tried programming the board, I had problems.  I got it working
  through some trial-and-error, but I am not sure exactly what was wrong.  I
  think it was mostly issues with write protectiong and locking.
- When debugging, it is normal to get this error from OpenOCD:
  Error: address + size wrapped(0xffffffff, 0x00000004)

To connect to the device (assumes the JTAG programmer is plugged connected to
your PC and board, and that the board is powered up).  You will need to choose
the appropriate interface cfg script for your programmer:
openocd -f interface/olimex-arm-usb-tiny-h.cfg -f target/stm32f1x.cfg

Then in another command prompt, connect to the OpenOCD daemon:
telnet localhost 4444

As a general rule, you must halt before running commands:
reset halt

To view the flash banks (the STM32-P103 microcontroller should only have a
bank #0):
flash banks

To view the bank info:
flash probe 0

To view the sectors in the bank (particular usefuly to check write protect
status):
flash info 0

To check the option bytes:
stm32f1x options_read 0

To unlock:
stm32f1x unlock 0

To disable write protect (afterwards, "flash info 0" still shows the memory as
protected - you need to do a "reset halt" before it shows the new status):
flash protect 0 0 last off

To check erase state of the sectors:
flash erase_check 0

To program:
flash erase_sector 0 0 last
flash write_bank 0 main.bin 0
reset run



debug:
Start daemon:
openocd -f openocd_stm32_p103_dbg.cfg

arm-none-eabi-gdb
file stm32_p103_blink_flash_asm.elf
target remote localhost:3333
monitor reset halt
break main.c:46