Embedded Files
Description:
Description:
The program reads AUX channel 4 in an event triggered mode, i.e., each time the convst_in signal goes high. (The convst_in signal has been tied to a clock divider and goes high every 227/100E6 seconds, or roughly every 1.3 seconds.)
The unipolar analog input signal, with a range from 0 to 1 V, for AUX channel 4 is connected to port JA[7] with JA[3] being grounded. The resulting ADC conversion values are continuously updated on the HEX display with switch 15 selecting HEX or decimal notation.
It was implemented in Vivado version 17.2.
Verilog Code:
Verilog Code:
/////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////
// Single Channel XADC Version, Event Version (reads channel 4 about once a second)
module MyA2D_SingleChannel_04_EventMode(
input clk,
output [6:0] seg, //each bit corresponds to one of the 7 segments on the display
output [3:0] an, //specifies which of the 4 displays is to be turned on (temporarily)
input [15:0] sw, //sw[0], Hex vs. Decimal display, sw[15] reset
output[15:0] led,
input [7:0] JA
);
// ADC channel to be used h4 means AUXPOS: JA[7] AUXNEG: JA[3] IMPORTANT READ BELOW
// NOTE: if you change XADC channel, you must also change the corresponding port asignments below!!!!!!!
wire analog_pos_in, analog_neg_in;
assign analog_pos_in = JA[7];
assign analog_neg_in = JA[3];
wire [15:0] do_out; // ADC value; useful part are only [15:4] bits
// instantiate IP XADC using IP Catatlog / FPGA Features and Design / XADC / XADC Wizard
// BASIC TAB: DRP, Event Mode; Single Channel rest default
// ADC Setup TAB: Seqencer Mode: Off; Channel Averaging: None; Enable CALIBRATION Averagin checked; (rest unchecked or default)
// Alarms Tab: Turn off all alarms
// Single Channel Tab: Slected Channel: VAUXP5 VAUXN5; Channel Enable: checked (rest all unchecked)
// slow system clock down and generate a conversion "event" driver signal
parameter MAX_CLOCK_BIT = 26;
reg [MAX_CLOCK_BIT:0] slowclk;
always@(posedge clk) begin
slowclk <= slowclk+1;
end
wire convst_in;
assign convst_in = slowclk[MAX_CLOCK_BIT];
wire [4 : 0] channel_out;
assign led[4:0] = channel_out;
wire eoc_out;
assign led[5] = eoc_out;
///----------- Begin Cut here for INSTANTIATION Template ---// INST_TAG THIS IS THE CONTINOUS MODE
xadc_wiz_1 XADC_Channel4_Event (
//.di_in(di_in), // input wire [15 : 0] di_in
.daddr_in(channel_out), // input wire [6 : 0] daddr_in
.den_in(eoc_out), // input wire den_in
.dwe_in(1'b0), // input wire dwe_in
//.drdy_out(drdy_out), // output wire drdy_out
.do_out(do_out), // output wire [15 : 0] do_out
.dclk_in(clk), // input wire dclk_in
.reset_in(sw[14]), // input wire reset_in
.convst_in(convst_in), // input wire convst_in
//.vp_in(vp_in), // input wire vp_in
//.vn_in(vn_in), // input wire vn_in
.vauxp4(analog_pos_in), // note since vauxn5, channel 5, is used .daddr_in(ADC_ADDRESS), ADC_ADRESS = 15h, i.e., 010101
.vauxn4(analog_neg_in), // note since vauxn5, channel 5, is used .daddr_in(ADC_ADDRESS), ADC_ADRESS = 15h, i.e., 010101
.channel_out(channel_out), // output wire [4 : 0] channel_out
.eoc_out(eoc_out), // output wire eoc_out
.alarm_out(led[6]), // output wire alarm_out
.eos_out(led[7]), // output wire eos_out
.busy_out(led[8]) // output wire busy_out
);
// INST_TAG_END ------ End INSTANTIATION Template ---------
// Setup Hex Display
wire [15:0] value_in;
assign value_in = do_out[15:4];
HexDisplayV2 MyHexDisplay(
clk, //the system clock running at least 25 MHz
value_in, //the 16 bit binary value to be displayed
sw[15], //if HI converts binary value into decimal value, else displays HEX
1, seg, an );
endmodule
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
XADC Wizard Implementation
Create the XADC using Vivado's: Flow Navigator / Project Manager / IP Catatlog / FPGA Features and Design / XADC / XADC Wizard and then instantiate it using the provided template in the IP Sources window.
Constraint File
Remove comment statements, i.e., enable them for the following ports:
clk,
output [6:0] seg, //each bit corresponds to one of the 7 segments on the display
output [3:0] an, //specifies which of the 4 displays is to be turned on (temporarily)
input [15:0] sw, //sw[0], Hex vs. Decimal display, sw[15] reset
output[15:0] led,
input [7:0] JA
Link to Hex Display Module
The Hex Display Module HexDisplayV2.v code can be found here.
Bit File has been attached below.
Page updated
Report abuse