Richard Kuo
/
NTOUEE-mbed-ADC_Sensor
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Revision 0:2e74e9d97542, committed 2016-10-20
- Comitter:
- rkuo2000
- Date:
- Thu Oct 20 12:31:28 2016 +0000
- Commit message:
- mbed ADC read sensor
Changed in this revision
diff -r 000000000000 -r 2e74e9d97542 .gitignore --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.gitignore Thu Oct 20 12:31:28 2016 +0000 @@ -0,0 +1,4 @@ +.build +.mbed +projectfiles +*.py*
diff -r 000000000000 -r 2e74e9d97542 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Oct 20 12:31:28 2016 +0000
@@ -0,0 +1,16 @@
+// using NuMaker-PFM-NUC472 ADC0 (A0/PE_1) to read gas sensor (MQ-3)
+#include "mbed.h"
+
+AnalogIn adc0(PE_1); // A0 connected to MQ-3 gas sensor
+DigitalOut led(LED1);
+
+int main(void)
+{
+ printf("ADC0 start reading...\n\r");
+ while (1) {
+ printf("ADC0 value= 0x%4x, percentage= %3.3f%%\n\r",adc0.read_u16(), adc0.read()*100.0f);
+ if(adc0 > 0.7f) led = 0; // > 0.7 * Vcc wil turn on led
+ else led = 1;
+ wait(0.2f);
+ }
+}
diff -r 000000000000 -r 2e74e9d97542 mbed-os.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Thu Oct 20 12:31:28 2016 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#a6f3fd1a60d5df59246d7caf3f108c4d34e1808e