Unable to run Bootloader code from RAM in STM8S105K6

[raghavendra2]

Posted on November 21, 2009 at 16:54

Unable to run Bootloader code from RAM in STM8S105K6

[raghavendra2]

Posted on May 17, 2011 at 15:04

Hi,

I'm writing a bootloader which does only programming of flash.

I took the input from ST application notes. I'm trying to run the bootloader from RAM, control is able to ''Bootloadermain()'' @ RAM (bootloader main fun) but failing to run from that location.

I'm using _fctcpy('') for copying the bootloader code to RAM supported only in COSMIC compiler.

Please give me your input to resolve the problem.

Best regards,

Raghavendra

[cgha21]

Posted on May 17, 2011 at 15:04

I think you should copy the flash_write and erase function to ram rather than the total iap application.

The stm8s_flash.c locate these functions in .FLASH_CODE section. Then you should add it in the

project setting -> linker -> category -> input ->ram. Don't forget to change the option to -ic. Then you can use the fctcpy to copy it to ram.

[raghavendra2]

Posted on May 17, 2011 at 15:04

Thank you for reply. Since my RAM code does only reading from UART and writing to FLASH(Size of bootloader code is 300bytes). Can't I directly run from RAM? as you told, I have defined FLASH_CODE section in RAM

Thanks,

Raghavendra

[ This message was edited by: raghavendra.hn on 20-08-2009 12:23 ]

[mozra27]

Posted on May 17, 2011 at 15:04

Hi Raghavendra,

You must add the dedicated FLASH byte operation functions that you use in your application (copie/paste the needed functions in the stm8s_flash.c after the FLASH_CODE section definition)

Yes you can run from RAM if your code lowers than RAM size.

Regards

mozra

[raghavendra2]

Posted on May 17, 2011 at 15:04

Hi,

Thanks for the input. I'm unable to erase the flash from my bootloader code. I could only erase part of flash i.e., only i could erase first two blocks of the FLASH. It is not erasing from 0x8100. Please help me to resolve this issue.

Thanks,

Raghavendra

[mozra27]

Posted on May 17, 2011 at 15:04

Hi Raghavendra,

Can you please check the size of the user boot code area by checking the user boot code (UBC) option byte value, normally the bootloader area is read/write protected.

For more details you can refer to user boot code area as described in reference manual (RM0016) ''Section 4.4.1: User boot area (UBC)''.

Regards

mozra

[raghavendra2]

Posted on May 17, 2011 at 15:04

Hi Mozra,

Thanks for the input.

Please note I'm not using UBC. I'm copying the code to RAM. Code size is 700Bytes which is within RAM size(2K). But still i could erase using

RAM code.

Regards,

Raghavendra

[mozra27]

Posted on May 17, 2011 at 15:04

Hi Raghavendra,

What is the clock speed used in your application? if higher than 16MHz

please try with wait state = 1 and keep us informed

Regards

mozra

[jacekkedzior]

Posted on May 17, 2011 at 15:04

Hello

In my application i need the bootloader to be able to update firmware without rainsonance programmer. I have never used the bootloader and boot loader manual (um560) gives no guidance on how to start with bootloader. Could you please give me a step by step giude how to enable boot loader support on STM8s207 and how to use flash loader demonstration to upload new BIN file to this microcontroller?

Regards

jackkpl

[rhoek9]

Posted on May 17, 2011 at 15:04

uploaded the same reply 3 times. oeps :p

[ This message was edited by: r.hoek on 22-10-2009 14:08 ]