Nuvoton
/
NuMaker-mbed-ADC0_MQ3
NuMaker ADC read gas sensor (MQ3)
main.cpp@12:015640054db1, 2021-02-24 (annotated)
- Committer:
- SHLIU1@OANBE02333.nuvoton.com
- Date:
- Wed Feb 24 16:27:23 2021 +0800
- Revision:
- 12:015640054db1
- Parent:
- 10:84e277e4aae7
Support the both V5.X and V6.X
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" |
ccli8 |
10:84e277e4aae7 | 3 | |
ccli8 |
10:84e277e4aae7 | 4 | /* NOTE: Connect UNO A0 to MQ-3 gas sensor for this test */ |
ccli8 |
10:84e277e4aae7 | 5 | AnalogIn adc0(A0); |
rkuo2000 | 0:1f30d2df739e | 6 | |
rkuo2000 | 0:1f30d2df739e | 7 | DigitalOut led(LED1); |
rkuo2000 | 0:1f30d2df739e | 8 | |
rkuo2000 | 0:1f30d2df739e | 9 | int main(void) |
rkuo2000 | 0:1f30d2df739e | 10 | { |
SHLIU1@OANBE02333.nuvoton.com | 12:015640054db1 | 11 | #ifdef MBED_MAJOR_VERSION |
SHLIU1@OANBE02333.nuvoton.com | 12:015640054db1 | 12 | printf("Mbed OS version %d.%d.%d\r\n\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION); |
SHLIU1@OANBE02333.nuvoton.com | 12:015640054db1 | 13 | #endif |
rkuo2000 | 0:1f30d2df739e | 14 | printf("ADC0 start reading...\n\r"); |
rkuo2000 | 0:1f30d2df739e | 15 | while (1) { |
rkuo2000 | 0:1f30d2df739e | 16 | printf("ADC0 value= 0x%4x, percentage= %3.3f%%\n\r",adc0.read_u16(), adc0.read()*100.0f); |
rkuo2000 | 0:1f30d2df739e | 17 | if(adc0 > 0.7f) led = 0; // > 0.7 * Vcc wil turn on led |
rkuo2000 | 0:1f30d2df739e | 18 | else led = 1; |
SHLIU1@OANBE02333.nuvoton.com | 12:015640054db1 | 19 | #if MBED_MAJOR_VERSION >= 6 |
SHLIU1@OANBE02333.nuvoton.com | 12:015640054db1 | 20 | ThisThread::sleep_for(200); |
SHLIU1@OANBE02333.nuvoton.com | 12:015640054db1 | 21 | #else |
rkuo2000 | 0:1f30d2df739e | 22 | wait(0.2f); |
SHLIU1@OANBE02333.nuvoton.com | 12:015640054db1 | 23 | #endif |
SHLIU1@OANBE02333.nuvoton.com | 12:015640054db1 | 24 | |
rkuo2000 | 0:1f30d2df739e | 25 | } |
rkuo2000 | 0:1f30d2df739e | 26 | } |