Re: [Amforth] Need some help with the SPI

[Jan K. <kro...@ho...>]

Dear Peter

This is the code I need to model in amForth

// enable SPI.Master
  SPI.setDataMode(SPI_MODE0);
  SPI.setBitOrder(MSBFIRST);
  SPI.setClockDivider(SPI_CLOCK_DIV4);
  SPI.begin();

What to do with

\ check SPI device datasheet for mode settings
: spi.setmode ( spi-mode -- )
 spi.mode pin!
;

With kindly regards,

Jan





Op 8 jun. 2019, om 20:45 heeft Matthias Trute <mt...@we...<mailto:mt...@we...>> het volgende geschreven:

Hi,

You can also use the following words to avoid c!@spi, which is
missing from the preassembled package for the Arduino:


\ send a byte, ignore received byte
: c!spi ( c -- )
   SPDR c! ( c addr -- )
;

 \ receive a byte, send a dummy one
: c@spi ( -- c)
   0 SPDR c! 1 ms SPDR c@
;

SPDR is a constant holding the address of the SPI data register (&78)

Thanks, I've added some comments to the spi.frt file.

Matthias


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