Revision 0:e4b7a2f63736, committed 2015-02-03

Comitter:

yangcq88517

Date:

Tue Feb 03 19:56:43 2015 +0000

Child:

1:b9f6d029c760

Commit message:

FM24V10

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FM24V10.cpp	Tue Feb 03 19:56:43 2015 +0000
@@ -0,0 +1,127 @@
+#include "FM24V10.h"
+
+// A1 pin ground == false
+// A2 pin ground == false
+FM24V10::FM24V10(PinName sda, PinName scl, bool A1, bool A2): _i2c_bus(sda,scl)
+{
+    _speed = FREQUENCY_FULL;
+    Init(A1, A2);
+}
+
+FM24V10::FM24V10(PinName sda, PinName scl, bool A1, bool A2, SPEED_MODE speed): _i2c_bus(sda,scl)
+{
+    switch (speed) {
+        case STANDARD:
+            _speed = FREQUENCY_STANDARD;
+            break;
+        case FULL:
+            _speed = FREQUENCY_FULL;
+            break;
+        case FAST:
+            _speed = FREQUENCY_FAST;
+            break;
+        case HIGH:
+            _speed = FREQUENCY_HIGH;
+            break;
+    }
+    Init(A1, A2);
+}
+
+void FM24V10::Init(bool A1, bool A2)
+{
+    _i2c_bus.frequency(_speed);
+
+    _addr = 0xA0;
+
+    if (A1)
+        _addr |= 0x04;
+
+    if (A2)
+        _addr |= 0x08;
+}
+
+void FM24V10::GetSlaveAddress(int position)
+{
+    if ((position >> 16) == 0x01)
+        _addr |= 0x02;
+    else _addr &= 0xFD;
+}
+
+void FM24V10::WriteShort(int position, int value, bool Hs_mode)
+{
+    WriteShort(position, &value, 1, Hs_mode);
+}
+
+// position from 0x000000 to 0x01FFFF
+void FM24V10::WriteShort(int position, int * value, int size, bool Hs_mode)
+{
+    GetSlaveAddress(position);
+
+    if (Hs_mode)
+        StartHS();
+
+    _i2c_bus.start();
+
+    _i2c_bus.write(_addr);
+    _i2c_bus.write(position >> 8);
+    _i2c_bus.write(position);
+
+    for (int i = 0 ; i< size; i++) {
+        _i2c_bus.write(*(value + i) >> 8);
+        _i2c_bus.write(*(value + i));
+    }
+
+    _i2c_bus.stop();
+
+    if (Hs_mode)
+        StopHS();
+}
+
+int FM24V10::ReadShort(int position, bool Hs_mode)
+{
+    ReadShort(position, &result, 1,Hs_mode);
+    return result;
+}
+
+// position from 0x000000 to 0x01FFFF
+void FM24V10::ReadShort(int position, int * value, int size, bool Hs_mode)
+{
+    GetSlaveAddress(position);
+
+    if (Hs_mode)
+        StartHS();
+
+    _i2c_bus.start();
+    _i2c_bus.write(_addr);
+    _i2c_bus.write(position >> 8);
+    _i2c_bus.write(position);
+
+    _i2c_bus.start();
+    _i2c_bus.write(_addr | 0x01);
+
+    for (int i = 0; i< size; i++) {
+        *(value + i) = _i2c_bus.read(1) << 8;
+
+        if (i == size - 1)
+            *(value + i) |= _i2c_bus.read(0);
+        else
+            *(value + i) |= _i2c_bus.read(1);
+    }
+
+    _i2c_bus.stop();
+
+    if (Hs_mode)
+        StopHS();
+}
+
+void FM24V10::StartHS()
+{
+    _i2c_bus.start();
+    _i2c_bus.write(HS_COMMAND);
+    _i2c_bus.frequency(FREQUENCY_HIGH);
+}
+
+void FM24V10::StopHS()
+{
+    _i2c_bus.frequency(_speed);
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FM24V10.h	Tue Feb 03 19:56:43 2015 +0000
@@ -0,0 +1,48 @@
+#ifndef UK_AC_HERTS_SMARTLAB_FM24V10
+#define UK_AC_HERTS_SMARTLAB_FM24V10
+
+#include "mbed.h"
+
+class FM24V10
+{
+public :
+    enum SPEED_MODE {
+        STANDARD,FULL,FAST,HIGH
+    };
+
+    FM24V10(PinName sda, PinName scl, bool A1, bool A2);
+
+    FM24V10(PinName sda, PinName scl, bool A1, bool A2, SPEED_MODE speed);
+
+    void WriteShort(int position, int value, bool Hs_mode);
+    
+    void WriteShort(int position, int * value, int size, bool Hs_mode);
+
+    void ReadShort(int position, int * value, int size, bool Hs_mode);
+    
+    int ReadShort(int position, bool Hs_mode);
+    
+private :
+    static const int HS_COMMAND = 0x09;
+
+    static const int FREQUENCY_STANDARD = 100000;
+    static const int FREQUENCY_FULL = 400000;
+    static const int FREQUENCY_FAST = 1000000;
+    static const int FREQUENCY_HIGH = 3200000;
+
+    I2C _i2c_bus;
+    int _speed;
+    int _addr;
+    
+    int result;
+
+    void Init(bool A1, bool A2);
+
+    void GetSlaveAddress(int position);
+
+    void StartHS();
+
+    void StopHS();
+};
+
+#endif
\ No newline at end of file