Flash programming with Eclipse + OpenOCD, & read protect

Development Boards MicroMod
1

Hello,

I am using Eclipse + OpenOCD (ver. 0.1.0) to program the FLASH of STM32F103ZCT6 in the Eclipse environment, which was working

very good so far.

But now it has stopped working & It produces following dump in the console of the ECLIPSE.

Open On-Chip Debugger 0.1.0 (2009-01-21-21:15) Release

BUGS? Read http://svn.berlios.de/svnroot/repos/openocd/trunk/BUGS

$URL: https://kc8apf@svn.berlios.de/svnroot/r … /openocd.c $

500 kHz

500 kHz

Info : JTAG tap: stm32.cpu tap/device found: 0x3ba00477 (Manufacturer: 0x23b, Part: 0xba00, Version: 0x3)

Info : JTAG Tap/device matched

Info : JTAG tap: stm32.bs tap/device found: 0x06414041 (Manufacturer: 0x020, Part: 0x6414, Version: 0x0)

Error: JTAG tap: stm32.bs got: 0x06414041 (mfg: 0x020, part: 0x6414, ver: 0x0)

Error: JTAG tap: stm32.bs expected 1 of 1: 0x16410041 (mfg: 0x020, part: 0x6410, ver: 0x1)

Error: trying to validate configured JTAG chain anyway…

Info : JTAG tap: stm32.cpu tap/device found: 0x3ba00477 (Manufacturer: 0x23b, Part: 0xba00, Version: 0x3)

Info : JTAG Tap/device matched

Info : JTAG tap: stm32.bs tap/device found: 0x06414041 (Manufacturer: 0x020, Part: 0x6414, Version: 0x0)

Error: JTAG tap: stm32.bs got: 0x06414041 (mfg: 0x020, part: 0x6414, ver: 0x0)

Error: JTAG tap: stm32.bs expected 1 of 1: 0x16410041 (mfg: 0x020, part: 0x6410, ver: 0x1)

Error: trying to validate configured JTAG chain anyway…

target state: halted

target halted due to debug-request, current mode: Handler HardFault

xPSR: 0x41000003 pc: 0x20000014

verify Capture-IR is disabled

target state: halted

target halted due to debug-request, current mode: Handler HardFault

xPSR: 0x41000003 pc: 0x20000014

Info : device id = 0x10016414

Error: SWJ-DP STICKY ERROR

Error: dcb_dhcsr 0x30003, nvic_shcsr 0x20000, nvic_cfsr 0x1, nvic_bfar 0xe000edf8

Warn : STM32 flash size failed, probe inaccurate - assuming 512k flash

Info : flash size = 512kbytes

Error: stm32x device protected

stm32x mass erase complete

Error: timed out while waiting for target halted

Error: error executing stm32x flash write algorithm

Error: flash writing failed with error code: 0xfffffc7a

Error: error writing to flash at address 0x08000000 at offset 0x00000000 (-902)

By the way, before i got this message, i downloaded program to READ PROTECT the Flash,

using the following code

if(FLASH_GetReadOutProtectionStatus() != SET)

{

FLASH_Unlock();//This MUST done first

FLASH_ReadOutProtection(ENABLE);

NVIC_GenerateSystemReset();

}

Can someone explain what went wrong & help me in getting this working again?

2

You must download a corresponding program to UNPROTECT the flash.

Look in the same place where you found the READ PROTECT code.

Also read STM32F10xxx Flash programming manual (PM0042) section 2.4.1

3

Hello mlu,

After this problem, I wanted to download the code to unprotect the flash.

But now i can NOT download any code, since flash writing fails, after mass erase, as per the dump in Eclipse.

4

There are two ways to do this

  • Put the unprotect code in RAM

or

  • Go through the exact writes to the flash controller registers that is needed, and do this by hand with a sequence of mww operations.

You should not need more a dozen flash controller operations

Its a pain but it is doable

5

try using the following to unlock the device, assuming flash is on bank 0

stm32x unlock 0

then perform a hardware reset, sometimes a power cycle may be required.

Cheers

Spen