Diff: main.cpp

Revision:

0:1197076b78f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon May 10 08:14:32 2010 +0000
@@ -0,0 +1,131 @@
+#include "mbed.h"
+#include "onewire.h"
+
+
+
+BYTE gSensorIDs[MAXSENSORS][OW_ROMCODE_SIZE];
+
+Serial pc(USBTX, USBRX); // tx, rx
+
+BYTE search_sensors(void) {
+    BYTE i;
+    BYTE id[OW_ROMCODE_SIZE];
+    BYTE diff, nSensors;
+
+    printf( "Scanning Bus for DS18X20\n" );
+
+    nSensors = 0;
+
+    for ( diff = OW_SEARCH_FIRST;
+            diff != OW_LAST_DEVICE && nSensors < MAXSENSORS ; ) {
+        DS18X20_find_sensor( &diff, &id[0] );
+
+        if ( diff == OW_PRESENCE_ERR ) {
+            printf( "No Sensor found\n" );
+            break;
+        }
+
+        if ( diff == OW_DATA_ERR ) {
+            printf( "Bus Error\n" );
+            break;
+        }
+
+        for (i=0;i<OW_ROMCODE_SIZE;i++)
+            gSensorIDs[nSensors][i]=id[i];
+
+        nSensors++;
+    }
+
+    return nSensors;
+}
+
+void uart_put_temp(const uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits) {
+//   uint8_t buffer[sizeof(int)*8+1];
+    uint16_t decicelsius;
+
+    float temperature;
+    pc.printf("[%s", (subzero)?"-":"+");
+//    pc.printf("%d.",cel);
+    //itoa((cel_frac_bits*DS18X20_FRACCONV),buffer,10);
+    //sprintf(buffer, "%d",(cel_frac_bits*DS18X20_FRACCONV));
+    //j=4-strlen(buffer);
+    //for (i=0;i<j;i++) pc.printf("0");
+    //pc.printf("%s °C [",buffer);
+//    pc.printf("  freak %d ::", (cel_frac_bits*DS18X20_FRACCONV));
+    // "rounding"
+    //pc.printf((subzero)?'-':'+');
+    decicelsius = DS18X20_temp_to_decicel(subzero, cel, cel_frac_bits);
+    temperature = decicelsius;
+    temperature = temperature/10;
+    pc.printf("%4.1f C]\n", temperature);
+
+    //pc.printf( "%d 0°C]\n",decicelsius);
+
+}
+
+
+
+
+int main(void) {
+
+    pc.printf("Qantum 1 wire interface test!\n");
+    uint8_t nSensors, i;
+    uint8_t subzero, cel, cel_frac_bits;
+
+    nSensors = search_sensors();
+
+    ow_command( DS18X20_CONVERT_T, 0);
+
+    pc.printf("Sensors found : %d\n", nSensors);
+    if (nSensors > 0) {
+        for (i=0; i<nSensors; i++) {
+            pc.printf("Sensor # %d is a ", i+1);
+            if ( gSensorIDs[i][0] == DS18S20_ID) {
+                pc.printf("DS18S20/DS1820 ");
+            } else pc.printf("DS18B20 ");
+            if ( DS18X20_get_power_status( &gSensorIDs[i][0] ) ==
+                    DS18X20_POWER_PARASITE )
+                pc.printf( "parasite" );
+            else pc.printf( "externally" );
+            pc.printf( " powered\n" );
+            DS18X20_show_id_uart( &gSensorIDs[i][0], OW_ROMCODE_SIZE );
+        }
+    }
+
+    pc.printf( "Convert_T and Read Sensor by Sensor (reverse order)\n" );
+    for ( i=nSensors; i>0; i-- ) {
+        if ( DS18X20_start_meas( DS18X20_POWER_PARASITE, &gSensorIDs[i-1][0] ) == DS18X20_OK ) {
+            wait_ms(DS18B20_TCONV_12BIT);
+            pc.printf("Sensor# %d = ", i);
+            if ( DS18X20_read_meas( &gSensorIDs[i-1][0], &subzero, &cel, &cel_frac_bits) == DS18X20_OK ) {
+                uart_put_temp(subzero, cel, cel_frac_bits);
+            } else pc.printf("CRC Error (lost connection?)\n");
+
+        } else pc.printf("Start meas. failed (short circuit?)\n");
+    }
+
+    while (1) {
+        for ( i=nSensors; i>0; i-- ) {
+            // if ( DS18X20_start_meas( DS18X20_POWER_PARASITE, &gSensorIDs[i-1][0] ) == DS18X20_OK ) {
+            pc.printf("Sensor# %d = ", i);
+            if ( DS18X20_read_meas( &gSensorIDs[i-1][0], &subzero, &cel, &cel_frac_bits) == DS18X20_OK ) {
+                uart_put_temp(subzero, cel, cel_frac_bits);
+            } else pc.printf("CRC Error (lost connection?)\n");
+           
+            //if ( DS18X20_start_meas( DS18X20_POWER_PARASITE, &gSensorIDs[i-1][0] ) == DS18X20_OK ) {
+            //} else pc.printf("Start meas. failed (short circuit?)\n");
+        }
+            ow_command( DS18X20_CONVERT_T, 0);
+            ow_parasite_enable();
+
+
+        //  ow_reset();
+        //   ow_command( DS18X20_CONVERT_T, 0);
+        //   ow_parasite_enable();
+        wait(10);
+        //   ow_parasite_disable();
+
+    }
+
+}
+