A basic Library for the 16 bit Differential A/D in the K64F Freedom platform
This Library cn use either A2D0 or 1. Note that when using A2D0 you must use pins ADC0_DP1 and ADC0_DM1. For A2D1 you must use pins ADC1_DP1 and ADC1_DM1.
AnalohIn_Diff.cpp
- Committer:
- JimCarver
- Date:
- 2014-05-20
- Revision:
- 0:0f6f4be28e21
- Child:
- 1:7b36e4381d83
File content as of revision 0:0f6f4be28e21:
#include "mbed.h" #include "AnalogIn_Diff.h" AnalogIn_Diff::AnalogIn_Diff(int channel) : ch(channel) { if(ch) BW_SIM_SCGC3_ADC1(1); else BW_SIM_SCGC6_ADC0(1); BW_ADC_SC1n_ADCH(ch, 0, 0x01); BW_ADC_SC1n_DIFF(ch, 0, 1); BW_ADC_CFG1_ADICLK(ch, 0); BW_ADC_CFG1_MODE(ch, 3); BW_ADC_CFG1_ADLSMP(ch, 0); // BW_ADC_CFG1_ADIV(ch, 3); BW_ADC_CFG1_ADLPC(ch, 0); } AnalogIn_Diff::~AnalogIn_Diff() { } int16_t AnalogIn_Diff::read_16(void) { BW_ADC_SC1n_ADCH(ch, 0, 0x01); while(!BR_ADC_SC1n_COCO(ch, 0)); return(BR_ADC_Rn_D(ch, 0)); } float AnalogIn_Diff::read(void) { int16_t i; float t; BW_ADC_SC1n_ADCH(ch, 0, 0x01); while(!BR_ADC_SC1n_COCO(ch, 0)); i = BR_ADC_Rn_D(ch, 0); t = ((float) i); t = t / 32768.0f; return(t); }