Ray Liu
Modify the file main.cpp for M487
Diff: main.cpp
- Revision:
- 0:9a9104a3d71f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Sep 29 05:41:53 2017 +0000
@@ -0,0 +1,22 @@
+// NuMaker-PFM-NUC472 use ADC0 (A0/PE_1) to read gas sensor (MQ-3)
+#include "mbed.h"
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+AnalogIn adc0(PE_1); // A0 connected to MQ-3 gas sensor
+#elif defined(TARGET_NUMAKER_PFM_M453)
+AnalogIn adc0(PB_0);
+#elif defined(TARGET_NUMAKER_PFM_M487)
+AnalogIn adc0(PB_6);
+#endif
+
+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);
+ }
+}