Richard Kuo
/
NTOUEE-mbed-ADC_Sensor
mbed ADC read gas sensor
main.cpp
- Committer:
- rkuo2000
- Date:
- 2016-10-20
- Revision:
- 0:2e74e9d97542
File content as of revision 0:2e74e9d97542:
// 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); } }