Merge branch 'master' of github.com:LongHairedHacker/HetpaLED

This commit is contained in:
sebastian 2014-08-01 00:33:18 +02:00
commit 40eb9895b4
2 changed files with 85 additions and 0 deletions

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/*
* Copyright (C) 2013 CircuitCo
*
* Virtual cape for SPI0 on connector pins P9.22 P9.21 P9.18 P9.17
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black";
/* identification */
part-number = "BB-HEPTALED";
version = "00A0";
/* state the resources this cape uses */
exclusive-use =
/* the pin header uses */
"P9.17", /* spi0_cs0 */
"P9.18", /* spi0_d1 */
"P9.21", /* spi0_d0 */
"P9.22", /* spi0_sclk */
/* the hardware ip uses */
"spi0";
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
/* default state has all gpios released and mode set to uart1 */
bb_spi0_pins: pinmux_bb_spi0_pins {
pinctrl-single,pins = <
0x150 0x30 /* spi0_sclk.spi0_sclk, INPUT_PULLUP | MODE0 */
0x154 0x30 /* spi0_d0.spi0_d0, INPUT_PULLUP | MODE0 */
0x158 0x10 /* spi0_d1.spi0_d1, OUTPUT_PULLUP | MODE0 */
0x15c 0x10 /* spi0_cs0.spi0_cs0, OUTPUT_PULLUP | MODE0 */
>;
};
};
};
fragment@1 {
target = <&spi0>; /* spi0 is numbered correctly */
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&bb_spi0_pins>;
channel@0 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "spidev";
reg = <0>;
spi-max-frequency = <16000000>;
spi-cpha;
};
};
};
};

17
beaglebone/spitest.py Normal file
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import spidev
import time
spi = spidev.SpiDev()
# create spi object
spi.open(1,0)
# open spi port 1, device (CS) 0
try:
while True:
resp = spi.xfer2([0xAA])
# transfer one byte
time.sleep(0.1)
# sleep for 0.1 seconds
except KeyboardInterrupt:
# Ctrl+C pressed, so...
spi.close()