Paul Staron
DS1820, DS18B20 single and multi sensor OS6 compliant. Based on Erik's original code. Tested on ST's F767 and H743 platforms. Using single and multiple sensors up to 15 meters of cable length.
Revision 0:a3c589406dc4, committed 2020-12-29
- Comitter:
- star297
- Date:
- Tue Dec 29 13:08:22 2020 +0000
- Child:
- 1:1aaf20a93f36
- Commit message:
- Initial commit
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DS1820.lib Tue Dec 29 13:08:22 2020 +0000 @@ -0,0 +1,1 @@ +DS1820#a43dcf6ca539
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Dec 29 13:08:22 2020 +0000
@@ -0,0 +1,70 @@
+#include "mbed.h"
+#include "DS1820.h"
+
+DigitalOut led(LED1);
+
+#define DATA_PIN A0
+#define MAX_PROBES 16
+DS1820* probe[MAX_PROBES];
+
+Timer t;
+
+int DS;
+float Temp[16];
+
+int main(){
+
+ printf("\033[0m\033[2J\033[HInitialise...!\n\n");
+
+ while (DS1820::unassignedProbe(DATA_PIN)) {
+ probe[DS] = new DS1820(DATA_PIN);
+ DS++;
+ if (DS == MAX_PROBES) {
+ break;
+ }
+ }
+
+ if (!DS) {
+ printf("No Sensors found!\n\n");
+ ThisThread::sleep_for(chrono::milliseconds(1000));
+ NVIC_SystemReset();
+ }
+
+ // set each probe resolution, default is 12bit (750ms)
+ probe[0]->setResolution(9);
+// probe[0]->setResolution(10);
+// probe[0]->setResolution(11);
+// probe[0]->setResolution(12);
+// probe[1]->setResolution(9);
+// probe[2]->setResolution(10);
+
+ t.start();
+
+ while(1) {
+
+ printf("\033[0m\033[2J\033[HDS Sensor data..\n\n");
+
+ int DS_error = 0;
+ for (int i = 0; i < DS; i++) {
+ Temp[i] = probe[i]->temperature();
+ if(Temp[i]==-1000) {
+ Temp[i] = probe[i]->temperature(); // get read temp again if error
+ DS_error++;
+ }
+ printf("Probe %d: %3.2f %cc\r\n",i,Temp[i],0xb0);
+ }
+ printf("\nDS errors: %d\n\n", DS_error);
+
+ printf("Start conversion\n");
+ t.reset();
+ // don't wait for conversion, but do something that takes at least 750ms before reading the sensors
+ //if(DS>0){probe[0]->convertTemperature(0, DS1820::all_devices);}
+
+ // wait for conversion, can take up to 750ms(12 bit mode)
+ if(DS>0){probe[0]->convertTemperature(1, DS1820::all_devices);}
+
+ printf("\nConvert process time: %0.6f Seconds\n", chrono::duration<float>(t.elapsed_time()).count());
+
+ ThisThread::sleep_for(chrono::milliseconds(1000));
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Tue Dec 29 13:08:22 2020 +0000 @@ -0,0 +1,1 @@ +https://github.com/armmbed/mbed-os/#84d991342a41011fc417aab62c0f5a8832f1d18f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json Tue Dec 29 13:08:22 2020 +0000
@@ -0,0 +1,11 @@
+
+{
+ "target_overrides": {
+ "*": {
+ "target.printf_lib": "std",
+ "platform.stdio-baud-rate": 115200,
+ "platform.stdio-convert-newlines": true
+ }
+ }
+
+}
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