8-bit MicrocontrollersのトピックRe: QE128 vs Interrupt Vector Redirection

QE128 vs Interrupt Vector Redirection

pbouf — Thu, 18 Feb 2010 00:59:21 GMT

The HCS08 Reference Manual specifies (HCS08RMV1.pdf section 4.5.5) that the interrupt vector table is relocated to a lower memory location (just below the protected FLASH area) when a region of FLASH is protected.

I know this applies to the QE8 but does it also apply to the QE64 and QE128 ? The MC9S08QE128RM.pdf document does not mention the relocation of the interrupt vector table.

Pierre

Re: QE128 vs Interrupt Vector Redirection

tonyp — Thu, 18 Feb 2010 01:09:03 GMT

No, QE64, QE96, and QE128 (that is, all the MMU versions) do not have vector redirection.

Re: QE128 vs Interrupt Vector Redirection

pbouf — Thu, 18 Feb 2010 01:16:01 GMT

Does anyone have a suggestion on how I can managed to use interrupts in my I2C bootloader and also in the application code ?

Re: QE128 vs Interrupt Vector Redirection

tonyp — Thu, 18 Feb 2010 01:45:55 GMT

Just because there is no automatic vector redirection doesn't mean you can't emulate it yourself.

For each vector you'll have to add code like the example below:

;in your application

RedirectedVswi dw SwiHandler

;in your bootloader code

ToSWI brset BOOTMODE.,Flags,LocalSWI

lda RedirectedVswi+1

psha

lda RedirectedVswi

psha

rts

LocalSWI

...

rti

; in actual vector area (in bootloader)

Vswi dw ToSWI

P.S. Just edited to show how to work with two ISRs depending on which code is running. BOOTMODE. flag should be set in bootmode and cleared in application. Flags should be shared by both codes.