st10f276 bootstrap

[hans239955]

Posted on April 15, 2005 at 15:52

st10f276 bootstrap

[hans239955]

Posted on April 13, 2005 at 15:37

hi - i'm developing an st10 programmer and am trying to enter BSL mode. i can get the st10 to echo the ACK byte (0xD5) but the 32-bytes of code I upload does not seem to work. I'm actually uploading just 10 bytes to have the st10 write to the RX buffer.

is there something more i need to do to have it run the bootcode?

[hans239955]

Posted on April 15, 2005 at 00:10

thanks! that did the trick...

now once it's loaded and running does my 32-byte boot loader have access to IRAM and XRAM?

[charles239955_st]

Posted on April 15, 2005 at 06:03

Hello,

In Bootstrap mode, the XPERCON is configured to 0x042D which means that: XRAM1, XRAM2, CAN1, XMISC and XFLash are enabled.

So yes you have access to all the DPRAM and XRAMs.

Take care that:

- your 32 bytes or in the range 0xFA40-0xFA5F

- the register bank starts at 0xFA00

- the Stack pointer is at 0xFA40

to not corrupt those locations.

Normally your 32 bytes will load more code, your complete code maybe. I suggest to put it in the 2kBytes of XRAM1 that is common to all the ST10F27x derivatives.

Regards,

Kenshin

[hans239955]

Posted on April 15, 2005 at 15:52

thanks! that's what i thought, but it appears that when i try and write to the XRAM i get a cpu exception. i'll double check my bsl code!