AS1531

Introduction

AS1531 is a 8 channels 12bits analog do digital converter made by Austriamicrosystem. The driver is included in ARMadeus distribution, but not currently on ARMadeus board.

Soldering

AS1531 chip use a SPI bus to communicate with the microprocessor, then to use it on APFx board it must be solder on a SPI bus. For example on APF27-Dev board it can be soldered on SPI3 bus, that can be found on connector J8.

Soldering schema for SPI3 APF27-dev

J8 pin	AS1531 pin
SD1_D0_SPI3_MISO	DOUT
SD1_D3_SPI3_SS	CSN
SD1_CMD_SPI3_MOSI	DIN
SP1_CLK_SPI3_SCLK	SCLK

Driver

The driver is included in ARMadeus distribution, then to use it, select it :

  [  ] $ make linux26-menuconfig

Device Drivers  --->
    <M> Hardware Monitoring support  --->
        <M>   Austria Microsystems AS1531 Analog to Digital Converter

And if the chip is plugged on SPI3 don't forget to select it :

Device Drivers  --->
    [*] SPI support  --->
        [*]     CSPI3