Linux: Add support for SPIDEV (#734)

RPi and Linux refactor. Add GPIO Sysfs for GPIO operations. Update configure script. Fix some cppcheck warnings. Add serial emulation that prints to stdout. Fix some file headers.
2017-01-14 23:50:21 +01:00
parent aa5cecfca1
commit 2e0f6b6229
43 changed files with 1574 additions and 593 deletions
@@ -0,0 +1,107 @@
+/*
+ * The MySensors Arduino library handles the wireless radio link and protocol
+ * between your home built sensors/actuators and HA controller of choice.
+ * The sensors forms a self healing radio network with optional repeaters. Each
+ * repeater and gateway builds a routing tables in EEPROM which keeps track of the
+ * network topology allowing messages to be routed to nodes.
+ *
+ * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
+ * Copyright (C) 2013-2017 Sensnology AB
+ * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
+ *
+ * Documentation: http://www.mysensors.org
+ * Support Forum: http://forum.mysensors.org
+ *
+ * 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.
+ *
+ * Based on TMRh20 RF24 library, Copyright (c) 2015 Charles-Henri Hallard <tmrh20@gmail.com>
+ */
+
+#include "SPI.h"
+#include <pthread.h>
+#include <stdlib.h>
+#include "log.h"
+
+static pthread_mutex_t spiMutex = PTHREAD_MUTEX_INITIALIZER;
+
+// Declare a single default instance
+SPIClass SPI = SPIClass();
+
+uint8_t SPIClass::initialized = 0;
+
+void SPIClass::begin()
+{
+	if (!initialized) {
+		if (!bcm2835_spi_begin()) {
+			logError("You need root privilege to use SPI.\n");
+			exit(1);
+		}
+	}
+
+	initialized++; // reference count
+}
+
+void SPIClass::end()
+{
+	if (initialized) {
+		initialized--;
+	}
+
+	if (!initialized) {
+		// End the SPI
+		bcm2835_spi_end();
+	}
+}
+
+void SPIClass::setBitOrder(uint8_t bit_order)
+{
+	bcm2835_spi_setBitOrder(bit_order);
+}
+
+void SPIClass::setDataMode(uint8_t data_mode)
+{
+	bcm2835_spi_setDataMode(data_mode);
+}
+
+void SPIClass::setClockDivider(uint16_t divider)
+{
+	bcm2835_spi_setClockDivider(divider);
+}
+
+void SPIClass::chipSelect(int csn_pin)
+{
+	if (csn_pin == RPI_GPIO_P1_26) {
+		csn_pin = BCM2835_SPI_CS1;
+	} else if (csn_pin == RPI_GPIO_P1_24) {
+		csn_pin = BCM2835_SPI_CS0;
+	} else {
+		csn_pin = BCM2835_SPI_CS0;
+	}
+	bcm2835_spi_chipSelect(csn_pin);
+	delayMicroseconds(5);
+}
+
+void SPIClass::beginTransaction(SPISettings settings)
+{
+	pthread_mutex_lock(&spiMutex);
+	setBitOrder(settings.border);
+	setDataMode(settings.dmode);
+	setClockDivider(settings.cdiv);
+}
+
+void SPIClass::endTransaction()
+{
+	pthread_mutex_unlock(&spiMutex);
+}
+
+void SPIClass::usingInterrupt(uint8_t interruptNumber)
+{
+	(void)interruptNumber;
+}
+
+void SPIClass::notUsingInterrupt(uint8_t interruptNumber)
+{
+	(void)interruptNumber;
+}