Diff: ds18b20.c

Revision:

0:b4b170ce93a4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ds18b20.c	Thu Apr 25 14:44:25 2019 +0000
@@ -0,0 +1,63 @@
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+
+#include           "log.h"
+#include        "1-wire.h"
+#include "1-wire-device.h"
+#include       "ds18b20.h"
+
+int16_t DS18B20Value[DEVICE_MAX];
+
+int     DS18B20RomCount;
+char*   DS18B20RomNames  [DEVICE_MAX];
+char    DS18B20Roms      [DEVICE_MAX * 8];
+void  (*DS18B20RomSetters[DEVICE_MAX])(char*);
+    
+
+#define MAX_TEMP_16THS 1600
+#define MIN_TEMP_16THS -160
+int DS18B20IsValidValue(int16_t value)
+{
+    return value < MAX_TEMP_16THS && value > MIN_TEMP_16THS;
+}
+void DS18B20ValueToString(int16_t value, char* buffer)
+{
+    switch (value)
+    {
+        case DS18B20_ERROR_CRC:                     strcpy (buffer, "CRC error"                     ); break;
+        case DS18B20_ERROR_NOT_FOUND:               strcpy (buffer, "ROM not found"                 ); break;
+        case DS18B20_ERROR_TIMED_OUT:               strcpy (buffer, "Timed out"                     ); break;
+        case DS18B20_ERROR_NO_DEVICE_PRESENT:       strcpy (buffer, "No device detected after reset"); break;
+        case DS18B20_ERROR_NO_DEVICE_PARTICIPATING: strcpy (buffer, "Device removed during search"  ); break;
+        default:                                    sprintf(buffer, "%1.1f", value / 16.0           ); break;
+    }
+}
+int16_t DS18B20ValueFromRom(char* rom)
+{
+    for (int device = 0; device < DeviceCount; device++) if (memcmp(DeviceList + 8 * device, rom, 8) == 0) return DS18B20Value[device];
+    return DS18B20_ERROR_NOT_FOUND;
+}
+
+void DS18B20ReadValue(int oneWireResult, int device, char byte0, char byte1)
+{
+    switch (oneWireResult)
+    {
+        case ONE_WIRE_RESULT_OK:
+            DS18B20Value[device] = byte1;
+            DS18B20Value[device] <<= 8;
+            DS18B20Value[device] |= byte0;
+            break;
+        case ONE_WIRE_RESULT_CRC_ERROR:               DS18B20Value[device] = DS18B20_ERROR_CRC;                     break;
+        case ONE_WIRE_RESULT_NO_DEVICE_PRESENT:       DS18B20Value[device] = DS18B20_ERROR_NO_DEVICE_PRESENT;       break;
+        case ONE_WIRE_RESULT_TIMED_OUT:               DS18B20Value[device] = DS18B20_ERROR_TIMED_OUT;               break;            
+        case ONE_WIRE_RESULT_NO_DEVICE_PARTICIPATING: DS18B20Value[device] = DS18B20_ERROR_NO_DEVICE_PARTICIPATING; break;
+        default:
+            LogF("Unknown OneWireResult %d\r\n", OneWireResult());
+            break;
+    }
+}
+void DS18B20Init()
+{
+    for (int i = 0; i < DEVICE_MAX; i++) DS18B20Value[i] = DS18B20_ERROR_NOT_FOUND;
+}
\ No newline at end of file