Hi,
I am using ADAS3022 (ADC Board) interfacing with HDK as shown in the below figure
With the clock frequency of 1MHZ.
Below table shows the expected output for the given input voltage
Below is the output table which I got
|
Input Voltage |
ADC value(HEX) |
ADC Value (Dec) |
|
5 |
6FFC |
28668 |
|
4.5 |
6F03 |
28419 |
|
0.5 |
0C5A |
3162 |
|
0.02 |
004E |
78 |
|
0 |
000B |
11 |
|
-0.02 |
FF8A |
-118 |
|
-0.5 |
F3A7 |
-3161 |
|
-5 |
82F7 |
-32009 |
Here is my code,
ADAS3022_HV_Clear_Conversion(); //Clear the conversion bit before start conversion
HV_SPI_delay(10); // Giving 10ms delay
gioSetBit(spiPORT2, SPI_PIN_CS0, 0u); //Enable the chip select
gioSetBit(rtpPORT, 14u, 0u); // Make busy flag as 0 during the start of conversion( Avtive low pin)
HV_SPI_delay(10); // Giving 10ms delay
ADAS3022_HV_Set_Conversion(); // Start the conversion
HV_SPI_delay(10); //Giving 10 ms delay
spiTransmitAndReceiveData(spiREG2, &dataconfig1_t, 1, &g_HV__dummy_u16[0],&HV_SPI_DEFAULT_DATA[0]); // Read the converted data
gioSetBit(spiPORT2, SPI_PIN_CS0, 1u); // Release the chip
gioSetBit(rtpPORT, 14u, 1u); // Make busy flag as 1 after the end of conversion
HV_SPI_delay(500);
Am getting the output as expected but the output values from HDK are not stable. For example, from the below table am giving input 5v, for that am getting the output as 6FFC but it varies from 6EF0 to 6F0A
|
Input Voltage |
ADC value(HEX) |
|
5 |
6FFC - it varies from 6FE0 to 6FFC |
|
4.5 |
6F03 - it varies from 6EF0 to 6F0A |
|
4 |
6335 - it varies from 632F to 6340 |
Kindly help me to stable the data. Thanks in Advance
