Diff: PortOut.h

Revision:

18:b3c9f16cbb96

Child:

24:e2ac27c8e93e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PortOut.h	Mon May 17 14:18:54 2010 +0000
@@ -0,0 +1,98 @@
+/* mbed Microcontroller Library - PortOut
+ * Copyright (c) 2006-2009 ARM Limited. All rights reserved.
+ */ 
+ 
+#ifndef MBED_PORTOUT_H
+#define MBED_PORTOUT_H
+
+#include "platform.h"
+#include "PinNames.h"
+#include "Base.h"
+
+#include "PortNames.h"
+
+namespace mbed {
+/* Class: PortOut
+ *   A multiple pin digital out
+ *
+ * Example:
+ * > // Toggle all four LEDs
+ * >
+ * > #include "mbed.h"
+ * >
+ * > // LED1 = P1.18  LED2 = P1.20  LED3 = P1.21  LED4 = P1.23
+ * > #define LED_MASK 0x00B40000
+ * >
+ * > PortOut ledport(Port1, LED_MASK);
+ * >
+ * > int main() {
+ * >     while(1) {
+ * >         ledport = LED_MASK;
+ * >         wait(1);
+ * >         ledport = 0;
+ * >         wait(1);
+ * >     }
+ * > }
+ */  
+class PortOut {
+public:
+
+    /* Constructor: PortOut
+     *  Create an PortOut, connected to the specified port
+     *
+     * Variables:
+     *  port - Port to connect to (Port0-Port5)
+     *  mask - A bitmask to identify which bits in the port should be included (0 - ignore)
+   	 */ 
+    PortOut(PortName port, int mask = 0xFFFFFFFF);
+
+    /* Function: write
+     *  Write the value to the output port
+     *
+     * Variables:
+     *  value - An integer specifying a bit to write for every corresponding PortOut pin
+     */    
+    void write(int value) {
+        _gpio->FIOSET = value & _mask;
+        _gpio->FIOCLR = ~(value) & _mask;
+    }
+
+    /* Function: read
+     *  Read the value currently output on the port
+     *
+     * Variables:
+     *  returns - An integer with each bit corresponding to associated PortOut pin setting
+     */
+    int read() {
+        return _gpio->FIOPIN & _mask;
+    }
+
+    /* Function: operator=
+     *  A shorthand for <write>
+     */    
+    PortOut& operator= (int value) { 
+    	write(value);
+	    return *this;
+    }
+    
+    PortOut& operator= (PortOut& rhs) { 
+    	write(rhs.read());
+	    return *this;
+    }
+    
+    /* Function: operator int()
+     *  A shorthand for <read>
+     */
+    operator int() { 
+	    return read();
+    }
+
+private:
+    LPC_GPIO_TypeDef    *_gpio;
+    PortName            _port; 
+    uint32_t            _mask;    
+};
+
+} // namespace mbed
+
+#endif