BAP TUDelft / ADS1015_v2

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

ADS1015.cpp@0:94493b8b0fb0, 2018-06-26 (annotated)

Committer:
xorjoep
Date:
Tue Jun 26 13:30:53 2018 +0000
Revision:
0:94493b8b0fb0
Child:
1:c1ddf7c2d65b
ADS van Jasper geimplementeerd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
xorjoep 0:94493b8b0fb0 1 #include "mbed.h"
xorjoep 0:94493b8b0fb0 2 #include "ADS1015.h"
xorjoep 0:94493b8b0fb0 3
xorjoep 0:94493b8b0fb0 4 void startSingleShotConversion(I2C* i2c_plate, uint8_t address, uint16_t config)
xorjoep 0:94493b8b0fb0 5 {
xorjoep 0:94493b8b0fb0 6 char txbuf[10];
xorjoep 0:94493b8b0fb0 7 // set mux to correct input
xorjoep 0:94493b8b0fb0 8 txbuf[0] = AD1015_REG_CONFIG;
xorjoep 0:94493b8b0fb0 9 txbuf[1] = config >> 8;
xorjoep 0:94493b8b0fb0 10 txbuf[2] = config & 0xFF;
xorjoep 0:94493b8b0fb0 11 i2c_plate->write(address, txbuf, 3);
xorjoep 0:94493b8b0fb0 12 }
xorjoep 0:94493b8b0fb0 13
xorjoep 0:94493b8b0fb0 14 double readConversionResult(I2C* i2c_plate, uint8_t address, uint16_t config)
xorjoep 0:94493b8b0fb0 15 {
xorjoep 0:94493b8b0fb0 16 int16_t raw_data;
xorjoep 0:94493b8b0fb0 17 char rxbuf[10];
xorjoep 0:94493b8b0fb0 18 char txbuf[10];
xorjoep 0:94493b8b0fb0 19 txbuf[0] = AD1015_REG_CONVERSION_RESULT;
xorjoep 0:94493b8b0fb0 20 i2c_plate->write(address, txbuf, 1, true);
xorjoep 0:94493b8b0fb0 21 i2c_plate->read(address, rxbuf, 2);
xorjoep 0:94493b8b0fb0 22 raw_data = (rxbuf[0] << 8) | rxbuf[1];
xorjoep 0:94493b8b0fb0 23 return data_to_voltage(raw_data, config);
xorjoep 0:94493b8b0fb0 24 }
xorjoep 0:94493b8b0fb0 25
xorjoep 0:94493b8b0fb0 26 double data_to_voltage(int16_t data, uint16_t config)
xorjoep 0:94493b8b0fb0 27 {
xorjoep 0:94493b8b0fb0 28 double voltage;
xorjoep 0:94493b8b0fb0 29 data = data >> 4;
xorjoep 0:94493b8b0fb0 30 switch(config & 0x0E00) {
xorjoep 0:94493b8b0fb0 31 case AD1015_CONFIG_FSR_6144:
xorjoep 0:94493b8b0fb0 32 voltage = 0.003 * (double)data;
xorjoep 0:94493b8b0fb0 33 break;
xorjoep 0:94493b8b0fb0 34 case AD1015_CONFIG_FSR_4096:
xorjoep 0:94493b8b0fb0 35 voltage = 0.002 * (double)data;
xorjoep 0:94493b8b0fb0 36 break;
xorjoep 0:94493b8b0fb0 37 case AD1015_CONFIG_FSR_2048:
xorjoep 0:94493b8b0fb0 38 voltage = 0.001 * (double)data;
xorjoep 0:94493b8b0fb0 39 break;
xorjoep 0:94493b8b0fb0 40 case AD1015_CONFIG_FSR_1024:
xorjoep 0:94493b8b0fb0 41 voltage = 0.0005 * (double)data;
xorjoep 0:94493b8b0fb0 42 break;
xorjoep 0:94493b8b0fb0 43 case AD1015_CONFIG_FSR_0512:
xorjoep 0:94493b8b0fb0 44 voltage = 0.00025 * (double)data;
xorjoep 0:94493b8b0fb0 45 break;
xorjoep 0:94493b8b0fb0 46 case AD1015_CONFIG_FSR_0256:
xorjoep 0:94493b8b0fb0 47 voltage = 0.000125 * (double)data;
xorjoep 0:94493b8b0fb0 48 break;
xorjoep 0:94493b8b0fb0 49 default:
xorjoep 0:94493b8b0fb0 50 break;
xorjoep 0:94493b8b0fb0 51 }
xorjoep 0:94493b8b0fb0 52 return voltage;
xorjoep 0:94493b8b0fb0 53 }