Nuvoton
/
NuMaker-mbed-ADC0_MQ3
NuMaker ADC read gas sensor (MQ3)
main.cpp@8:29e0733dd8b2, 2017-10-17 (annotated)
- Committer:
- ccchang
- Date:
- Tue Oct 17 11:28:49 2017 +0800
- Revision:
- 8:29e0733dd8b2
- Parent:
- 7:e951e13ae71e
- Child:
- 10:84e277e4aae7
Support NANO130
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
rkuo2000 | 1:605a7fdd4e93 | 1 | // NuMaker-PFM-NUC472 use ADC0 (A0/PE_1) to read gas sensor (MQ-3) |
rkuo2000 | 0:1f30d2df739e | 2 | #include "mbed.h" |
shliu1 |
5:fc7ae837af13 | 3 | #if defined(TARGET_NUMAKER_PFM_NUC472) |
shliu1 |
5:fc7ae837af13 | 4 | AnalogIn adc0(PE_1); // A0 connected to MQ-3 gas sensor |
shliu1 |
5:fc7ae837af13 | 5 | #elif defined(TARGET_NUMAKER_PFM_M453) |
shliu1 |
5:fc7ae837af13 | 6 | AnalogIn adc0(PB_0); |
shliu1 |
7:e951e13ae71e | 7 | #elif defined(TARGET_NUMAKER_PFM_M487) |
shliu1 |
7:e951e13ae71e | 8 | AnalogIn adc0(PB_6); |
ccchang |
8:29e0733dd8b2 | 9 | #elif defined(TARGET_NUMAKER_PFM_NANO130) |
ccchang |
8:29e0733dd8b2 | 10 | AnalogIn adc0(PA_0); |
shliu1 |
5:fc7ae837af13 | 11 | #endif |
rkuo2000 | 0:1f30d2df739e | 12 | |
rkuo2000 | 0:1f30d2df739e | 13 | DigitalOut led(LED1); |
rkuo2000 | 0:1f30d2df739e | 14 | |
rkuo2000 | 0:1f30d2df739e | 15 | int main(void) |
rkuo2000 | 0:1f30d2df739e | 16 | { |
rkuo2000 | 0:1f30d2df739e | 17 | printf("ADC0 start reading...\n\r"); |
rkuo2000 | 0:1f30d2df739e | 18 | while (1) { |
rkuo2000 | 0:1f30d2df739e | 19 | printf("ADC0 value= 0x%4x, percentage= %3.3f%%\n\r",adc0.read_u16(), adc0.read()*100.0f); |
rkuo2000 | 0:1f30d2df739e | 20 | if(adc0 > 0.7f) led = 0; // > 0.7 * Vcc wil turn on led |
rkuo2000 | 0:1f30d2df739e | 21 | else led = 1; |
rkuo2000 | 0:1f30d2df739e | 22 | wait(0.2f); |
rkuo2000 | 0:1f30d2df739e | 23 | } |
rkuo2000 | 0:1f30d2df739e | 24 | } |