Merge branch 'master' of github.com:LongHairedHacker/HetpaLED
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commit
40eb9895b4
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/*
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* Copyright (C) 2013 CircuitCo
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*
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* Virtual cape for SPI0 on connector pins P9.22 P9.21 P9.18 P9.17
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/dts-v1/;
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/plugin/;
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/ {
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compatible = "ti,beaglebone", "ti,beaglebone-black";
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/* identification */
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part-number = "BB-HEPTALED";
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version = "00A0";
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/* state the resources this cape uses */
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exclusive-use =
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/* the pin header uses */
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"P9.17", /* spi0_cs0 */
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"P9.18", /* spi0_d1 */
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"P9.21", /* spi0_d0 */
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"P9.22", /* spi0_sclk */
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/* the hardware ip uses */
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"spi0";
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fragment@0 {
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target = <&am33xx_pinmux>;
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__overlay__ {
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/* default state has all gpios released and mode set to uart1 */
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bb_spi0_pins: pinmux_bb_spi0_pins {
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pinctrl-single,pins = <
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0x150 0x30 /* spi0_sclk.spi0_sclk, INPUT_PULLUP | MODE0 */
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0x154 0x30 /* spi0_d0.spi0_d0, INPUT_PULLUP | MODE0 */
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0x158 0x10 /* spi0_d1.spi0_d1, OUTPUT_PULLUP | MODE0 */
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0x15c 0x10 /* spi0_cs0.spi0_cs0, OUTPUT_PULLUP | MODE0 */
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>;
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};
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};
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};
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fragment@1 {
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target = <&spi0>; /* spi0 is numbered correctly */
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__overlay__ {
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#address-cells = <1>;
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#size-cells = <0>;
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status = "okay";
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pinctrl-names = "default";
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pinctrl-0 = <&bb_spi0_pins>;
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channel@0 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "spidev";
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reg = <0>;
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spi-max-frequency = <16000000>;
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spi-cpha;
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};
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};
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};
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};
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@ -0,0 +1,17 @@
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import spidev
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import time
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spi = spidev.SpiDev()
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# create spi object
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spi.open(1,0)
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# open spi port 1, device (CS) 0
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try:
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while True:
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resp = spi.xfer2([0xAA])
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# transfer one byte
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time.sleep(0.1)
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# sleep for 0.1 seconds
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except KeyboardInterrupt:
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# Ctrl+C pressed, so...
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spi.close()
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