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This version (12 Sep 2014 10:02) was approved by Andrei Cozma.The Previously approved version (05 Feb 2014 20:21) is available.Diff

Linux Drivers

IIO The Linux Industrial I/O (IIO) subsystem is intended to provide support for devices that, in some sense, are analog-to-digital or digital-to-analog converters. Devices that fall into this category are:

  • ADCs - can be used on ADCs ranging from a 1MSPS SoC ADC to >250 MSPS industrial ADCs
  • DACs
  • Accelerometers, gyros, IMUs
  • Capacitance-to-Digital converters (CDCs)
  • Pressure, temperature, and light sensors, etc.
  • RF Transceivers (like the AD9361)

The IIO Divers for the motor control solution require the HDL cores to have a specified register map. A DMA interface is set up for high speed data transfer using multiple multiplexed data channels. Below is the list of IIO drivers for the motor control solution.

IIO DriverName Description Channels
ad-mc-adc Driver for the controller board ADCs CH1 - Ia measurement
CH2 - Ib measurement
CH3 - It measurement
CH4 - Vbus measurement
ad-mc-adc2 Driver for the low voltage drive board ADCs CH1 - Ia measurement
CH2 - Ib measurement
CH3 - It measurement
ad-mc-speed Driver for the speed and position processing block CH1 - Speed measurement
ad-mc-ctrl Driver for the motor controller block CH1 : CH8 - Controller monitoring signals

Each IIO driver has in the device tree and entry related to the actual driver and an entry corresponding to the allocated DMA. Below is an example of how the device tree looks for the motor control IIO drivers.

ad-mc-adc@40500000 {
	compatible = "xlnx,axi-ad-mc-adc-1.00.a";
	reg = <0x40500000 0x10000>;
	dmas = <&axi_dma_0 0>;
	dma-names = "ad-mc-adc-dma";
};

axi_dma_1: axidma1@40420000 {
	compatible = "adi,axi-dmac-1.00.a";
	reg = <0x40420000 0x10000>;
	#dma-cells = <1>;
	interrupts = <0 54 0>;
	clocks = <&clkc 16>;

	dma-channel {
		adi,buswidth = <32>;
		adi,type = <0>;
	};
};

ad-mc-ctrl@40520000 {
	compatible = "xlnx,axi-ad-mc-ctrl-1.00.a";
	reg = <0x40520000 0x10000>;
	dmas = <&axi_dma_1 0>;
	dma-names = "ad-mc-ctrl-dma";
};

axi_dma_2: axidma2@40410000 {
	compatible = "adi,axi-dmac-1.00.a";
	reg = <0x40410000 0x10000>;
	#dma-cells = <1>;
	interrupts = <0 56 0>;
	clocks = <&clkc 16>;

	dma-channel {
		adi,buswidth = <32>;
		adi,type = <0>;
	};
};

ad-mc-speed@40510000 {
	compatible = "xlnx,axi-ad-mc-speed-1.00.a";
	reg = <0x40510000 0x10000>;
	dmas = <&axi_dma_2 0>;
	dma-names = "ad-mc-speed-dma";
};

axi_dma_3: axidma3@40430000 {
	compatible = "adi,axi-dmac-1.00.a";
	reg = <0x40430000 0x10000>;
	#dma-cells = <1>;
	interrupts = <0 53 0>;
	clocks = <&clkc 16>;

	dma-channel {
		adi,buswidth = <64>;
		adi,type = <0>;
	};
};

ad-mc-adc2@40530000 {
	compatible = "xlnx,axi-ad-mc-adc-1.00.a";
	reg = <0x40530000 0x10000>;
	dmas = <&axi_dma_3 0>;
	dma-names = "ad-mc-adc-dma";
};

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resources/eval/user-guides/ad-fmcmotcon1-ebz/software/linux_drivers.txt · Last modified: 12 Sep 2014 10:02 by Andrei Cozma