初始化提交

arduino-cli/libraries/RF24/utility/MRAA/gpio.cpp

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+/* 
+ * TMRh20 2015
+ * 
+ */
+
+#include "gpio.h"
+
+GPIO::GPIO()
+{
+    // Prophet: basic members initialization
+    gpio_ce_pin = -1;
+    //gpio_cs_pin = -1;
+    gpio_0 = NULL;
+    //gpio_1 = NULL;
+}
+
+GPIO::~GPIO()
+{
+    // Prophet: this should free memory, and unexport pins when RF24 and/or GPIO gets deleted or goes out of scope
+    this->close(gpio_ce_pin);
+    //this->close(gpio_cs_pin);
+}
+
+void GPIO::begin(uint8_t ce_pin, uint8_t cs_pin)
+{
+    gpio_ce_pin = ce_pin;
+    //gpio_cs_pin = cs_pin;
+
+    // Prophet: owner can be set here, because we use our pins exclusively, and are making mraa:Gpio context persistent
+    // so pins will be unexported only if close is called, or on destruction
+    gpio_0 = new mraa::Gpio(ce_pin/*,0*/);
+    //gpio_1 = new mraa::Gpio(cs_pin/*,0*/);
+}
+
+void GPIO::open(int port, int DDR)
+{
+    if (port == gpio_ce_pin) {
+        gpio_0 = new mraa::Gpio(port, 0);
+        gpio_0->useMmap(true);
+        gpio_0->dir((mraa::Dir) DDR);
+    }/*else
+	if(port == gpio_cs_pin){
+		gpio_1 = new mraa::Gpio(port,0);
+		gpio_1->useMmap(true);
+		gpio_1->dir( (mraa::Dir)DDR);
+	}*/
+}
+
+void GPIO::close(int port)
+{
+    // Prophet: using same theme of working with port numbers as with GPIO::open,
+    // checking for mraa::Gpio context existence to be sure, that GPIO::begin was called
+    if (port == gpio_ce_pin) {
+        if (gpio_0 != NULL) {
+            delete gpio_0;
+        }
+    }
+
+    /*if(port == gpio_cs_pin) {
+        if (gpio_1 != NULL)	{
+            delete gpio_1;
+        }
+    }*/
+}
+
+int GPIO::read(int port)
+{
+    if (port == gpio_ce_pin) {
+        return gpio_0->read();
+    }/*else
+	if(port == gpio_cs_pin){
+		return gpio_1->read();
+	}*/
+    return -1;
+}
+
+void GPIO::write(int port, int value)
+{
+
+    if (port == gpio_ce_pin) {
+        gpio_0->write(value);
+    }/*else
+	if(port == gpio_cs_pin){
+		gpio_1->write( value);
+	}*/
+}