ivp wrote:
> I have a dsPIC33FJ64GP802 application where I need the SPI buss
> for an SD card. For whatever reason I can't see SPI activity. Being
> so far quite unfamiliar with the dsPIC firmware I don't know whether
> I've got something missing in either the remapping or the SPI module

Note that the pin mapping hardware can be set up to allow mapping only once
or many times.  Make sure it's not set to the once mode and that some other
module is pin mapping previously.

I didn't look it up, but your line

>     config __FOSC,IOL1WAY_ON   ;one-time IOLOCK disabled

looks a little suspicious.  The symbol name implies on, but the comment say=
s
off.

> do_spi:    mov     #0x5555,w0
>            mov     w0,SPI1BUF
>            lcd_pos #0x0a
>            displ   #'*'
>            call    delaypt5
>            lcd_pos #0x0a
>            displ   #0x20
>            call    delaypt5
>            bra     do_spi

I don't know what DELAYPT5 does, but it's not obvious anything is waiting
for the SPI hardware to be ready before writing to SPI1BUF.


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