Diff: DS18B20.cpp

Revision:

1:2d86c674a78b

Parent:

0:03ec282c2908

--- a/DS18B20.cpp	Fri Jan 29 19:01:56 2010 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,86 +0,0 @@
-#include "DS18B20.h"
-#include "DS1Wire.h"
-#include "mbed.h"
-#include <stdint.h>
-
-// Device byte commands over 1-wire serial
-enum COMMANDS { READ_ROM = 0x33, CONVERT = 0x44, READ_SCRATCHPAD = 0xBE,  SKIP_ROM = 0xCC };
-
-// device onboard register layout
-typedef struct {
-    uint8_t    LSB;
-    uint8_t    MSB;
-    uint8_t    Th;
-    uint8_t    Tl;
-    uint8_t    config;
-    uint8_t    reserved0xFF;
-    uint8_t    reserved0xCH;
-    uint8_t    reserved0x10;
-    uint8_t    CRC;
-} ScratchPad_t;
-
-
-DigitalOut conversionInProgress(LED4);  // conversion in progress
-DigitalOut resetFailure(LED1);          // for error reporting
-extern DigitalInOut sensor;     // sensor pin
-
-static void inError() {
-    while (1) {
-        resetFailure = !resetFailure;
-        wait(0.2);
-    }
-}
-
-void DoConversion() {
-    if (Reset(sensor) != 0) {
-        inError();
-    } else {
-        conversionInProgress = 1;       // led on
-        WriteByte(sensor, SKIP_ROM);            // Skip ROM
-        WriteByte(sensor, CONVERT);             // Convert
-        while (ReadBit(sensor) == 0) {
-            // wait for conversion to complete
-        }
-        conversionInProgress = 0;       // led off
-    }
-}
-
-uint32_t GetTemperature() {
-    uint32_t result = 0;
-    if (Reset(sensor) != 0) {
-        inError();
-    } else {
-        ScratchPad_t scratchpad;
-        WriteByte(sensor, SKIP_ROM);    // Skip ROM
-        WriteByte(sensor, READ_SCRATCHPAD);    // Read Scrachpad
-        scratchpad.LSB = ReadByte(sensor);
-        scratchpad.MSB = ReadByte(sensor);
-        Reset(sensor);    // terminate read as we only want temperature
-        result = ((scratchpad.MSB << 8) | scratchpad.LSB);
-    }
-    return result;
-}
-
-ROM_Code_t ReadROM() {
-    ROM_Code_t ROM_Code;
-    if (Reset(sensor) != 0) {
-        inError();
-    } else {
-        
-        WriteByte(sensor, READ_ROM);    // Read ROM
-        for (uint32_t i = 0; i < 8; ++i) {
-            ROM_Code.rom[i] = ReadByte(sensor);
-        }
-    }
-    return ROM_Code;
-}
-
-// temperature is store as 7.4 fixed point format (assuming 12 bit conversion)
-void displayTemperature(Serial& s) {
-    DoConversion();
-    uint32_t temp = GetTemperature();
-    float f = (temp & 0x0F) * 0.0625;    // calculate .4 part
-    f += (temp >> 4);    // add 7.0 part to it
-    s.printf("Temp is %2.1fC\n\r", f);    // display in 2.1 format
-}
-