Diff: Interface/OneWire.h

Revision:

0:7c6dd6bc20e4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Interface/OneWire.h	Mon Apr 15 07:02:49 2013 +0000
@@ -0,0 +1,105 @@
+#ifndef ONE_WIRE
+#define ONE_WIRE
+
+#include "mbed.h"
+#include "rtos.h"
+
+class OneWire;
+
+typedef void (* OneWire_Instruction_Func)(OneWire *);
+
+typedef struct OneWire_InstCall{
+    unsigned char code;
+    OneWire_Instruction_Func inst;
+    void * args;
+} OneWire_InstCall;
+
+typedef struct OneWire_Instruction{
+    OneWire_InstCall network;
+    OneWire_InstCall transport;
+} OneWire_Instruction;
+
+typedef void (* OneWire_ReadHandler)(OneWire * which, char bit);
+
+typedef enum OneWire_Error {SUCCESS,
+                            NO_PRESENCE,
+                             ABORTED,
+                             CRC_ERROR} OneWire_Error;
+
+#define ONEWIRE_TIMESLOT 60 // 60 to 120
+#define ONEWIRE_RECOVER 1 // 1 to whatever
+#define ONEWIRE_PULSEHIGH 30 // 15 to 30
+#define ONEWIRE_PULSELOW 120 // 60 to 240
+#define ONEWIRE_WRITE1LOW 1 // 1 to 15
+#define ONEWIRE_WRITE0LOW 59 // 1 to ONEWIRE_TIMESLOT-1
+#define ONEWIRE_READLOW 1 // 1 to 14
+#define ONEWIRE_READDURATION 15 // 15
+#define ONEWIRE_READRELEASE 15 // 0 to 44
+
+extern const unsigned short DEFAULT_TIMES[];
+
+typedef void(OneWire::*OneWire_MicroInstruction)(void);
+
+// type for detection handler
+typedef void (* OneWire_Detection_Handler)(OneWire * which);
+
+class OneWire {
+public:
+    OneWire(PinName pin);
+    int send(OneWire_Instruction *, unsigned char);
+    void endInstruction();
+    void repeatInstruction();
+    
+    // stops all communication, resuming blocked thread with error.
+    void abort(OneWire_Error err);
+    
+    // one wire wakeup function
+    
+    // public fields
+    OneWire_Error error;
+    char registers[16];
+    
+    // configuration
+    OneWire_Detection_Handler detecthandle;
+    const unsigned short * timeing;
+    OneWire_ReadHandler readhandle;
+    OneWire_InstCall execute;
+    
+    // high level IO ops
+    void op_send1();
+    void op_send0();
+    void op_read();
+    void op_reset();
+    
+private:
+    // system resources
+    DigitalInOut _pin;
+    InterruptIn _detect;
+    Timeout _timer;
+    osThreadId _caller;
+    
+    // instruction system
+    OneWire_Instruction * _instruction;
+    unsigned char _instn;
+    unsigned char _inststate;
+    static const OneWire_MicroInstruction _OneWire_MicroProgram[];
+    unsigned char _microinstc;
+    unsigned char _microinstn;
+    
+    void _nextmicroinst();
+    void _resumeinst();
+    void _nextinst();
+    
+    // reset presence detect handler
+    static void _presencedetect(OneWire * which, char bit);
+    
+    // external interrupt handler
+    void _ei_detect();
+    
+    // low level IO ops
+    void _io_high();
+    void _io_low();
+    void _io_read();
+};
+
+#endif
\ No newline at end of file