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derivative.c(file created)

@@ -0,0 +1,89 @@
1 + ///////////////////////////////////////////////////////////////////////////////////////////////
2 + // SINEIO
3 + ///////////////////////////////////////////////////////////////////////////////////////////////
4 +
5 + #include <time.h>
6 + #include "../myWin826.h"
7 + #include "../826api.h"
8 + #include "../RealTime.h"
9 +
10 + #define SAMPLE_RATE 750 // SET ME
11 +
12 + // IO card configuration constants
13 + #define IO_BOARD_NUM 0 // no change
14 + #define ADC_SLOT 0 // no change
15 +
16 + #define DAC_ZERO_OUTPUT 0x8000
17 + #define DAC_CONFIG_GAIN S826_DAC_SPAN_10_10 // -10 to 10 spans 20 volts so...
18 + #define DAC_VRANGE 20.0 // This MUST correspond to the DAC_SPAN just above
19 + #define DAC_CNT_RANGE 0xFFFF // 16-bit DAC
20 + #define DAC_OFFSET_COUNTS 0x8000 // 32768 offset for a signed desired output mapped to unsigned DAC write.
21 +
22 + #define DAC_CHANNEL 1 // SET ME! CHECK YOUR SETUP: DAC channel output
23 +
24 + #define ADC_CHANNEL 0 // SET ME! CHECK YOUR SETUP: analog input channel to track
25 +
26 +
27 + #define ADC_CNT_RANGE 0xFFFF // 2^16= 0xFFFF (16 bit converter)
28 + #define ADC_GAIN S826_ADC_GAIN_1 // -10 to 10 option
29 + #define ADC_VRANGE 20 // this must correspond to gain setting
30 +
31 +
32 + #define ADC_ENABLE 1
33 +
34 + int main()
35 + {
36 + int errcode = S826_ERR_OK;
37 + int boardflags = S826_SystemOpen(); // open 826 driver and find all 826 boards
38 + int slotdata; // adc data from the slot of interest
39 + int ncount = 0;
40 + uint dacout;
41 +
42 + double voltagein = 0.0;
43 + double voltageout = 0;
44 +
45 + // instantiate our "real time" object that will pace our loop
46 + RealTime realTime(SAMPLE_RATE);
47 +
48 + // Configure data achqisition interfaces and start them running.
49 + X826(S826_AdcSlotConfigWrite(IO_BOARD_NUM, ADC_SLOT, ADC_CHANNEL, 0, ADC_GAIN)); // program adc timeslot attributes: slot, chan, 0us settling time. For -5V-5V use: "S826_ADC_GAIN_2"
50 + X826(S826_AdcSlotlistWrite(IO_BOARD_NUM, 1 << ADC_SLOT, S826_BITWRITE)); // enable adc timeslot; disable all other slots
51 + X826(S826_AdcEnableWrite(IO_BOARD_NUM, ADC_ENABLE)); // enable adc conversions
52 +
53 + X826(S826_DacRangeWrite(IO_BOARD_NUM, DAC_CHANNEL, DAC_CONFIG_GAIN, 0)); // program dac output range: -10V to +10V
54 +
55 + // commence pseudo-real-time loop.
56 + realTime.Start();
57 +
58 + while (!_kbhit())
59 + {
60 + // read ADC sample
61 + X826(AdcReadSlot(IO_BOARD_NUM, ADC_SLOT, &slotdata));
62 + signed short int adcin = slotdata;
63 +
64 + // get the ADC sample as a voltage
65 + voltagein = (double)(adcin * ADC_VRANGE) / ADC_CNT_RANGE;
66 +
67 + // derivative of the 20 Hz input wave
68 + voltageout = cos(2.0*3.1415926*20 + ncount/SAMPLE_RATE);
69 +
70 + // scale the desired voltage to the DAC integer output.
71 + dacout = (uint)(voltageout * (DAC_CNT_RANGE / DAC_VRANGE) + DAC_OFFSET_COUNTS);
72 +
73 + // output to the DAC
74 + X826(S826_DacDataWrite(IO_BOARD_NUM, DAC_CHANNEL, dacout, 0));
75 +
76 + realTime.Sleep();
77 + ncount++;
78 + }
79 +
80 + realTime.Stop(ncount); // stop real-time loop
81 +
82 +
83 + X826(S826_DacDataWrite(IO_BOARD_NUM, DAC_CHANNEL, DAC_ZERO_OUTPUT, 0)); // put to zero at the end
84 + S826_SystemClose();
85 +
86 +
87 + return 0;
88 + }
89 +

wschrab revised this gist 1 month ago. Go to revision

1 file changed, 2 insertions, 2 deletions

IIR_second.c

@@ -46,8 +46,8 @@ int main()
46 46 double zv = 0.0;
47 47 double y_prev = 0.0;
48 48 double z_prev = 0.0;
49 - double A_coeff = 0.84606;
50 - double B_coeff = 0.15394;
49 + double A_coeff = 0.771587;
50 + double B_coeff = 0.228413;
51 51
52 52 // instantiate our "real time" object that will pace our loop
53 53 RealTime realTime(SAMPLE_RATE);

wschrab revised this gist 1 month ago. Go to revision

1 file changed, 100 insertions

IIR_second.c(file created)

@@ -0,0 +1,100 @@
1 + ///////////////////////////////////////////////////////////////////////////////////////////////
2 + // SINEIO
3 + ///////////////////////////////////////////////////////////////////////////////////////////////
4 +
5 + #include <time.h>
6 + #include "../myWin826.h"
7 + #include "../826api.h"
8 + #include "../RealTime.h"
9 +
10 + #define SAMPLE_RATE 750 // SET ME
11 +
12 + // IO card configuration constants
13 + #define IO_BOARD_NUM 0 // no change
14 + #define ADC_SLOT 0 // no change
15 +
16 + #define DAC_ZERO_OUTPUT 0x8000
17 + #define DAC_CONFIG_GAIN S826_DAC_SPAN_10_10 // -10 to 10 spans 20 volts so...
18 + #define DAC_VRANGE 20.0 // This MUST correspond to the DAC_SPAN just above
19 + #define DAC_CNT_RANGE 0xFFFF // 16-bit DAC
20 + #define DAC_OFFSET_COUNTS 0x8000 // 32768 offset for a signed desired output mapped to unsigned DAC write.
21 +
22 + #define DAC_CHANNEL 1 // SET ME! CHECK YOUR SETUP: DAC channel output
23 +
24 + #define ADC_CHANNEL 0 // SET ME! CHECK YOUR SETUP: analog input channel to track
25 +
26 +
27 + #define ADC_CNT_RANGE 0xFFFF // 2^16= 0xFFFF (16 bit converter)
28 + #define ADC_GAIN S826_ADC_GAIN_1 // -10 to 10 option
29 + #define ADC_VRANGE 20 // this must correspond to gain setting
30 +
31 +
32 + #define ADC_ENABLE 1
33 +
34 + int main()
35 + {
36 + int errcode = S826_ERR_OK;
37 + int boardflags = S826_SystemOpen(); // open 826 driver and find all 826 boards
38 + int slotdata; // adc data from the slot of interest
39 + int ncount = 0;
40 + uint dacout;
41 +
42 + double voltagein = 0.0;
43 + double voltageout = 0;
44 +
45 + double yv = 0.0;
46 + double zv = 0.0;
47 + double y_prev = 0.0;
48 + double z_prev = 0.0;
49 + double A_coeff = 0.84606;
50 + double B_coeff = 0.15394;
51 +
52 + // instantiate our "real time" object that will pace our loop
53 + RealTime realTime(SAMPLE_RATE);
54 +
55 + // Configure data achqisition interfaces and start them running.
56 + X826(S826_AdcSlotConfigWrite(IO_BOARD_NUM, ADC_SLOT, ADC_CHANNEL, 0, ADC_GAIN)); // program adc timeslot attributes: slot, chan, 0us settling time. For -5V-5V use: "S826_ADC_GAIN_2"
57 + X826(S826_AdcSlotlistWrite(IO_BOARD_NUM, 1 << ADC_SLOT, S826_BITWRITE)); // enable adc timeslot; disable all other slots
58 + X826(S826_AdcEnableWrite(IO_BOARD_NUM, ADC_ENABLE)); // enable adc conversions
59 +
60 + X826(S826_DacRangeWrite(IO_BOARD_NUM, DAC_CHANNEL, DAC_CONFIG_GAIN, 0)); // program dac output range: -10V to +10V
61 +
62 + // commence pseudo-real-time loop.
63 + realTime.Start();
64 +
65 + while (!_kbhit())
66 + {
67 + // read ADC sample
68 + X826(AdcReadSlot(IO_BOARD_NUM, ADC_SLOT, &slotdata));
69 + signed short int adcin = slotdata;
70 +
71 + // get the ADC sample as a voltage
72 + voltagein = (double)(adcin * ADC_VRANGE) / ADC_CNT_RANGE;
73 + yv = (A_coeff * y_prev) + (B_coeff * voltagein);
74 + zv = (A_coeff * z_prev) + (B_coeff * yv);
75 +
76 + // set v_prev for use in next iteration through loop
77 + y_prev = yv;
78 + z_prev = zv;
79 +
80 + voltageout = zv;
81 +
82 + // scale the desired voltage to the DAC integer output.
83 + dacout = (uint)(voltageout * (DAC_CNT_RANGE / DAC_VRANGE) + DAC_OFFSET_COUNTS);
84 +
85 + // output to the DAC
86 + X826(S826_DacDataWrite(IO_BOARD_NUM, DAC_CHANNEL, dacout, 0));
87 +
88 + realTime.Sleep();
89 + ncount++;
90 + }
91 +
92 + realTime.Stop(ncount); // stop real-time loop
93 +
94 +
95 + X826(S826_DacDataWrite(IO_BOARD_NUM, DAC_CHANNEL, DAC_ZERO_OUTPUT, 0)); // put to zero at the end
96 + S826_SystemClose();
97 +
98 +
99 + return 0;
100 + }

wschrab revised this gist 1 month ago. Go to revision

1 file changed, 0 insertions, 0 deletions

IIR_first.cpp renamed to IIR_first.c

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wschrab revised this gist 1 month ago. Go to revision

1 file changed, 96 insertions

IIR_first.cpp(file created)

@@ -0,0 +1,96 @@
1 + ///////////////////////////////////////////////////////////////////////////////////////////////
2 + // SINEIO
3 + ///////////////////////////////////////////////////////////////////////////////////////////////
4 +
5 + #include <time.h>
6 + #include "../myWin826.h"
7 + #include "../826api.h"
8 + #include "../RealTime.h"
9 +
10 + #define SAMPLE_RATE 750 // SET ME
11 +
12 + // IO card configuration constants
13 + #define IO_BOARD_NUM 0 // no change
14 + #define ADC_SLOT 0 // no change
15 +
16 + #define DAC_ZERO_OUTPUT 0x8000
17 + #define DAC_CONFIG_GAIN S826_DAC_SPAN_10_10 // -10 to 10 spans 20 volts so...
18 + #define DAC_VRANGE 20.0 // This MUST correspond to the DAC_SPAN just above
19 + #define DAC_CNT_RANGE 0xFFFF // 16-bit DAC
20 + #define DAC_OFFSET_COUNTS 0x8000 // 32768 offset for a signed desired output mapped to unsigned DAC write.
21 +
22 + #define DAC_CHANNEL 1 // SET ME! CHECK YOUR SETUP: DAC channel output
23 +
24 + #define ADC_CHANNEL 0 // SET ME! CHECK YOUR SETUP: analog input channel to track
25 +
26 +
27 + #define ADC_CNT_RANGE 0xFFFF // 2^16= 0xFFFF (16 bit converter)
28 + #define ADC_GAIN S826_ADC_GAIN_1 // -10 to 10 option
29 + #define ADC_VRANGE 20 // this must correspond to gain setting
30 +
31 +
32 + #define ADC_ENABLE 1
33 +
34 + int main()
35 + {
36 + int errcode = S826_ERR_OK;
37 + int boardflags = S826_SystemOpen(); // open 826 driver and find all 826 boards
38 + int slotdata; // adc data from the slot of interest
39 + int ncount = 0;
40 + uint dacout;
41 +
42 + double voltagein = 0.0;
43 + double voltageout = 0;
44 +
45 + double v_prev = 0.0;
46 + double A_coeff = 0.84606;
47 + double B_coeff = 0.15394;
48 +
49 + // instantiate our "real time" object that will pace our loop
50 + RealTime realTime(SAMPLE_RATE);
51 +
52 + // Configure data achqisition interfaces and start them running.
53 + X826(S826_AdcSlotConfigWrite(IO_BOARD_NUM, ADC_SLOT, ADC_CHANNEL, 0, ADC_GAIN)); // program adc timeslot attributes: slot, chan, 0us settling time. For -5V-5V use: "S826_ADC_GAIN_2"
54 + X826(S826_AdcSlotlistWrite(IO_BOARD_NUM, 1 << ADC_SLOT, S826_BITWRITE)); // enable adc timeslot; disable all other slots
55 + X826(S826_AdcEnableWrite(IO_BOARD_NUM, ADC_ENABLE)); // enable adc conversions
56 +
57 + X826(S826_DacRangeWrite(IO_BOARD_NUM, DAC_CHANNEL, DAC_CONFIG_GAIN, 0)); // program dac output range: -10V to +10V
58 +
59 + // commence pseudo-real-time loop.
60 + realTime.Start();
61 +
62 + while (!_kbhit())
63 + {
64 + // read ADC sample
65 + X826(AdcReadSlot(IO_BOARD_NUM, ADC_SLOT, &slotdata));
66 + signed short int adcin = slotdata;
67 +
68 + // get the ADC sample as a voltage
69 + voltagein = (double)(adcin * ADC_VRANGE) / ADC_CNT_RANGE;
70 + voltageout = (A_coeff * v_prev) + (B_coeff * voltagein);
71 +
72 + // set v_prev for use in next iteration through loop
73 + v_prev = voltageout;
74 +
75 + // scale the desired voltage to the DAC integer output.
76 + dacout = (uint)(voltageout * (DAC_CNT_RANGE / DAC_VRANGE) + DAC_OFFSET_COUNTS);
77 +
78 + // output to the DAC
79 + X826(S826_DacDataWrite(IO_BOARD_NUM, DAC_CHANNEL, dacout, 0));
80 +
81 + realTime.Sleep();
82 + ncount++;
83 + }
84 +
85 + realTime.Stop(ncount); // stop real-time loop
86 +
87 +
88 + X826(S826_DacDataWrite(IO_BOARD_NUM, DAC_CHANNEL, DAC_ZERO_OUTPUT, 0)); // put to zero at the end
89 + S826_SystemClose();
90 +
91 +
92 + return 0;
93 + }
94 +
95 +
96 +
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