flashforth-devel

Re: [Flashforth-devel] bit.txt problem

[Mikael N. <mik...@fl...>]

This might work. Not tested.


$24 constant ddrb
$24 constant portb
$01 constant out
$02 constant clk

ddrb  out bit1: spi-out-pin
portb out bit0: spi-out-0
portb out bit1: spi-out-1
portb clk bit0: spi-clk-0
portb clk bit1: spi-clk-1

: spi! ( u --- )
   spi-out-pin
   spi-clk-0
   #16 for
     dup $0001 and
     if spi-out-1 else spi-out-0 then
     spi-clk-1 2/ spi-clk-0
   next drop ;

Mike

On 18.01.2016 00:33, Donald Golding wrote:
> Does anyone have a sample of SPI code?
>
> Thanks,
> Don

Re: [Flashforth-devel] bit.txt problem

[Mikael N. <mik...@fl...>]

Or this. It depends on exactly what kind of SPI you want.

ddrb  out bit1: spi-out-pin
portb out bit0: spi-out-0 inlined
portb out bit1: spi-out-1 inlined
ddrb  clk bit1: spi-clk-pin
portb clk bit0: spi-clk-0 inlined
portb clk bit1: spi-clk-1 inlined

: spi! ( u --- )
   spi-pin-pin spi-clk-pin
   spi-clk-0
   #8 for
     dup $80 and
     if spi-out-1 else spi-out-0 then
     spi-clk-1 2* spi-clk-0
   next drop ;

Mike