Root/Examples/ADC/Test-QT-src/ADCw.cpp

1#include "ADCw.h"
2
3ADCw::ADCw()
4{
5    BUFFER_OFFSET = 8; //Ignore first 16 samples
6    ADC_SPI_CLKDIV=ADC_SPI_CLKDIV_MAX; //Set clock to minimum speed
7    BUFFER_LEN=16;
8    MUX_CHANNELS =0;
9
10    ADCBuffer = jz_adc_init();
11
12    //Clean FPGA RAM memory
13    for (int i = 0; i < 512; i++) //RAMB16_s9_s9 has 2048 bytes 8-bit
14    {
15        ADCBuffer[i] = 0x00000000; //Clean 4 register by cicle
16    }
17
18    adcConfig(ADC_CMD_SET_SPI_CLKDIV);
19    adcConfig(ADC_CMD_SET_FAST_CONV);
20    printf("\nADC in Fast Convertion Mode (10us) and Fs=9.8KHz (Min)\n");
21}
22
23void ADCw::testADC()
24{
25    int aggregate=0; float errorT=0;
26    /******************************* TEST 1 ***********************************/
27    printf("\nINIT TEST1: Autoselft {(Vref+) - (Vref-)}/2 -> Return 0x0200 \n");
28    adcConfig(ADC_CMD_SET_AUTOSELFT_1);
29    adcConfig(ADC_CMD_READ_AUTOSELFT_1);
30    for(int i=BUFFER_OFFSET; i< BUFFER_LEN/2+BUFFER_OFFSET; i++)
31    {
32        aggregate += (ADCBuffer[i]&0xFFFF + ((ADCBuffer[i]>>16)&0x0FFF));
33        printf("[%08X]", ADCBuffer[i]);
34    }
35    errorT=(aggregate/16)*100/0x200;
36    if((errorT<95)||(errorT>105))
37        printf("\n**WARNING** Test FAILED.\n\n");
38    else
39        printf("\nTest OK\n\n");
40
41    aggregate=0;
42    fflush (stdout);
43
44    /******************************* TEST 2 ***********************************/
45    printf("\n\nINIT TEST2: Autoselft (Vref-) -> Return 0x0000 \n");
46    adcConfig(ADC_CMD_SET_AUTOSELFT_2);
47    adcConfig(ADC_CMD_READ_AUTOSELFT_2);
48    for(int i=BUFFER_OFFSET; i< BUFFER_LEN/2+BUFFER_OFFSET; i++)
49    {
50        aggregate += (ADCBuffer[i]&0xFFFF + ((ADCBuffer[i]>>16)&0x0FFF));
51        printf("[%08X]", ADCBuffer[i]);
52    }
53    if(aggregate!=0)
54        printf("\n**WARNING** Test FAILED. Expected value=0x0000.\n\n");
55    else
56        printf("\nTest OK\n\n");
57
58    aggregate=0;
59    fflush (stdout);
60
61    /******************************* TEST 3 ***********************************/
62    printf("\n\nINIT TEST3: Autoselft (Vref+) -> Return 0x03FF \n");
63    adcConfig(ADC_CMD_SET_AUTOSELFT_3);
64    adcConfig(ADC_CMD_READ_AUTOSELFT_3);
65    for(int i=BUFFER_OFFSET; i< BUFFER_LEN/2+BUFFER_OFFSET; i++)
66    {
67        aggregate += (ADCBuffer[i]&0xFFFF + ((ADCBuffer[i]>>16)&0x0FFF));
68        printf("[%08X]", ADCBuffer[i]);
69    }
70    errorT=(aggregate/16)*100/0x3FF;
71    if((errorT<95)||(errorT>105))
72        printf("\n**WARNING** Test FAILED.\n\n");
73    else
74        printf("\nTest OK\n\n");
75
76    fflush (stdout);
77}
78
79void ADCw::powerDownADC()
80{
81    adcConfig(ADC_CMD_SET_POWER_DOWN);
82    printf("\nADC in Power Down Mode \n");
83}
84
85JZ_REG* ADCw::takeSamplesADC(int CHANNEL)
86{
87    adcConfig(ADC_CMD_SET_CHANNEL0+CHANNEL);
88    adcConfig(ADC_CMD_READ_CHANNEL0+CHANNEL);
89    return (JZ_REG*)(ADCBuffer+BUFFER_OFFSET);
90}
91
92void ADCw::adcConfig(uchar CMD)
93{
94    ADCBuffer[0] = (((MUX_CHANNELS<<6) + CMD)<<24) + \
95                    ((BUFFER_LEN+BUFFER_OFFSET*2) << 8) + \
96                    (ADC_SPI_CLKDIV);
97    while(adcCheckBufferFull()) usleep (10);
98}
99
100int ADCw::adcCheckBufferFull()
101{
102    return ADCBuffer[0]&0x20000000;
103}
104

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