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.
Diff: AnalohIn_Diff.cpp
- Revision:
- 1:7b36e4381d83
- Parent:
- 0:0f6f4be28e21
--- a/AnalohIn_Diff.cpp Tue May 20 00:58:33 2014 +0000 +++ b/AnalohIn_Diff.cpp Thu May 22 17:40:21 2014 +0000 @@ -2,30 +2,29 @@ #include "AnalogIn_Diff.h" -AnalogIn_Diff::AnalogIn_Diff(int channel) : ch(channel) { - if(ch) BW_SIM_SCGC3_ADC1(1); +AnalogIn_Diff::AnalogIn_Diff(int a2d_number) : ch(a2d_number) { + if(ch) BW_SIM_SCGC3_ADC1(1); // Turn on clock as needed 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); + BW_ADC_SC1n_DIFF(ch, 0, 1); // Differential Mode + BW_ADC_CFG1_ADICLK(ch, 0); // Bus Clock + BW_ADC_CFG1_MODE(ch, 3); // 16Bit differential mode + BW_ADC_CFG1_ADLSMP(ch, 0); // Short Sample Window + BW_ADC_CFG1_ADIV(ch, 3); // Clock / 8 + BW_ADC_CFG1_ADLPC(ch, 0); // Normal Power Mode } 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)); +int16_t AnalogIn_Diff::read_16(int channel) { // Returns a 16bit signed integer + BW_ADC_SC1n_ADCH(ch, 0, channel); // Trigger Conversion + while(!BR_ADC_SC1n_COCO(ch, 0)); // Wait for conversion to finish + return(BR_ADC_Rn_D(ch, 0)); // Return the result } -float AnalogIn_Diff::read(void) { +float AnalogIn_Diff::read(int channel) { int16_t i; float t; - BW_ADC_SC1n_ADCH(ch, 0, 0x01); + BW_ADC_SC1n_ADCH(ch, 0, channel); while(!BR_ADC_SC1n_COCO(ch, 0)); i = BR_ADC_Rn_D(ch, 0); t = ((float) i);