![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
MCP3425 sample
Dependencies: AQM0802 MCP3425 mbed
See http://developer.mbed.org/users/yasuyuki/notebook/MCP3425/
main.cpp@0:5999cefe7380, 2014-10-15 (annotated)
- Committer:
- yasuyuki
- Date:
- Wed Oct 15 14:40:22 2014 +0000
- Revision:
- 0:5999cefe7380
first release
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
yasuyuki | 0:5999cefe7380 | 1 | //********************** |
yasuyuki | 0:5999cefe7380 | 2 | // A/D Converter |
yasuyuki | 0:5999cefe7380 | 3 | // MCP3425 sample for mbed |
yasuyuki | 0:5999cefe7380 | 4 | // |
yasuyuki | 0:5999cefe7380 | 5 | // Voltage=(Vin+)-(Vin-) |
yasuyuki | 0:5999cefe7380 | 6 | // Voltage Range:-2.048V to 2.048V |
yasuyuki | 0:5999cefe7380 | 7 | // Resolution:2.048V/0x7FFF=62.5uV, 16bits |
yasuyuki | 0:5999cefe7380 | 8 | // Sampling Per Second |
yasuyuki | 0:5999cefe7380 | 9 | // 240 SPS, 12bits |
yasuyuki | 0:5999cefe7380 | 10 | // 60 SPS, 14bits |
yasuyuki | 0:5999cefe7380 | 11 | // 15 SPS, 16bits (default) |
yasuyuki | 0:5999cefe7380 | 12 | // |
yasuyuki | 0:5999cefe7380 | 13 | // (C)Copyright 2014 All rights reserved by Y.Onodera |
yasuyuki | 0:5999cefe7380 | 14 | // http://einstlab.web.fc2.com |
yasuyuki | 0:5999cefe7380 | 15 | //********************** |
yasuyuki | 0:5999cefe7380 | 16 | #include "mbed.h" |
yasuyuki | 0:5999cefe7380 | 17 | #include "AQM0802.h" |
yasuyuki | 0:5999cefe7380 | 18 | #include "MCP3425.h" |
yasuyuki | 0:5999cefe7380 | 19 | |
yasuyuki | 0:5999cefe7380 | 20 | #if defined(TARGET_LPC1768) |
yasuyuki | 0:5999cefe7380 | 21 | I2C i2c(p28,p27); |
yasuyuki | 0:5999cefe7380 | 22 | #endif |
yasuyuki | 0:5999cefe7380 | 23 | // for TG-LPC11U35-501 |
yasuyuki | 0:5999cefe7380 | 24 | #if defined(TARGET_LPC11U35_501) |
yasuyuki | 0:5999cefe7380 | 25 | I2C i2c(P0_5,P0_4); |
yasuyuki | 0:5999cefe7380 | 26 | #endif |
yasuyuki | 0:5999cefe7380 | 27 | // for Nucleo |
yasuyuki | 0:5999cefe7380 | 28 | #if defined(TARGET_NUCLEO_F401RE) |
yasuyuki | 0:5999cefe7380 | 29 | I2C i2c(D14,D15); |
yasuyuki | 0:5999cefe7380 | 30 | #endif |
yasuyuki | 0:5999cefe7380 | 31 | |
yasuyuki | 0:5999cefe7380 | 32 | AQM0802 lcd(i2c); |
yasuyuki | 0:5999cefe7380 | 33 | MCP3425 mcp3425(i2c); |
yasuyuki | 0:5999cefe7380 | 34 | |
yasuyuki | 0:5999cefe7380 | 35 | |
yasuyuki | 0:5999cefe7380 | 36 | int main() { |
yasuyuki | 0:5999cefe7380 | 37 | |
yasuyuki | 0:5999cefe7380 | 38 | char msg[10]; |
yasuyuki | 0:5999cefe7380 | 39 | short a; |
yasuyuki | 0:5999cefe7380 | 40 | float v; |
yasuyuki | 0:5999cefe7380 | 41 | |
yasuyuki | 0:5999cefe7380 | 42 | sprintf(msg,"MCP3425"); |
yasuyuki | 0:5999cefe7380 | 43 | lcd.locate(0,0); |
yasuyuki | 0:5999cefe7380 | 44 | lcd.print(msg); |
yasuyuki | 0:5999cefe7380 | 45 | wait(1); |
yasuyuki | 0:5999cefe7380 | 46 | |
yasuyuki | 0:5999cefe7380 | 47 | while(1) { |
yasuyuki | 0:5999cefe7380 | 48 | |
yasuyuki | 0:5999cefe7380 | 49 | a = mcp3425.get(); |
yasuyuki | 0:5999cefe7380 | 50 | sprintf(msg,"dat=%X",(unsigned short)a); |
yasuyuki | 0:5999cefe7380 | 51 | lcd.locate(0,0); |
yasuyuki | 0:5999cefe7380 | 52 | lcd.print(msg); |
yasuyuki | 0:5999cefe7380 | 53 | v = (float)a*2.048/0x7FFF; |
yasuyuki | 0:5999cefe7380 | 54 | sprintf(msg,"%f",v); |
yasuyuki | 0:5999cefe7380 | 55 | lcd.locate(0,1); |
yasuyuki | 0:5999cefe7380 | 56 | lcd.print(msg); |
yasuyuki | 0:5999cefe7380 | 57 | wait(1); // Do not exceed 15SPS with 16bits |
yasuyuki | 0:5999cefe7380 | 58 | } |
yasuyuki | 0:5999cefe7380 | 59 | |
yasuyuki | 0:5999cefe7380 | 60 | } |
yasuyuki | 0:5999cefe7380 | 61 |