#### hobbskw

##### Junior Member level 3

I am trying to make a sinewave lookup table. I would like it to be a series of 50 stored value, which I plan to use for SPWM.

However, when I try to create the lookup table, it is giving me a few errors, one of which says "single value range is not allowed in packed dimension"

This is the only error that gives and real details as to what is wrong with the code, though I cannot find any clear-cut explanation what this error means, nor can I find any solution online. Can anyone possible help see what the problem with my code is?

I appreciate any help!

I will try attaching an image of the error, which appears on each of the "sine[x] = y;" lines.

Code:

```
`timescale 1ns / 1ps
module duty_cycle_gen(
input clk,
input rst_n,
output AP,
output AN,
output BP,
output BN,
output CP,
output CN
);
// Input clock is 100MHz
//localparam CLOCK_FREQUENCY = 100000000;
localparam CLOCK_FREQUENCY = 1000000;
localparam STEP = CLOCK_FREQUENCY / 6;
// Counter for toggling of clock
integer counterA = 0;
integer counterB = 4 * STEP;
integer counterC = 2 * STEP;
reg [7:0] sine[0:49];
sine[0] = 0;
sine[1] = 157;
sine[2] = 311;
sine[3] = 460;
sine[4] = 602;
sine[5] = 735;
sine[6] = 856;
sine[7] = 963;
sine[8] = 1055;
sine[9] = 1131;
sine[10] = 1189;
sine[11] = 1228;
sine[12] = 1248;
sine[13] = 1248;
sine[14] = 1228;
sine[15] = 1189;
sine[16] = 1131;
sine[17] = 1055;
sine[18] = 963;
sine[19] = 856;
sine[20] = 735;
sine[21] = 602;
sine[22] = 460;
sine[23] = 311;
sine[24] = 157;
sine[25] = 0;
sine[26] = -157;
sine[27] = -311;
sine[28] = -460;
sine[29] = -602;
sine[30] = -735;
sine[31] = -856;
sine[32] = -963;
sine[33] = -1055;
sine[34] = -1131;
sine[35] = -1189;
sine[36] = -1228;
sine[37] = -1248;
sine[38] = -1248;
sine[39] = -1228;
sine[40] = -1189;
sine[41] = -1131;
sine[42] = -1055;
sine[43] = -963;
sine[44] = -856;
sine[45] = -735;
sine[46] = -602;
sine[47] = -460;
sine[48] = -311;
sine[49] = -157;
always @(posedge clk) begin
if (!rst_n) begin
counterA <= 8'h00;
counterB <= 4 * STEP;
counterC <= 2 * STEP;
end
else begin
// If counter is 100M, reset counter, ELSE count up
if (counterA == CLOCK_FREQUENCY - 1) begin
counterA <= 8'h00;
end
else begin
counterA <= counterA + 1;
end
if (counterB == CLOCK_FREQUENCY - 1) begin
counterB <= 8'h00;
end
else begin
counterB <= counterB + 1;
end
if (counterC == CLOCK_FREQUENCY - 1) begin
counterC <= 8'h00;
end
else begin
counterC <= counterC + 1;
end
end
end
assign AP = (counterA < 3*STEP) ? 1 : 0;
assign AN = ~AP;
assign BP = (counterB < 3*STEP) ? 1 : 0;
assign BN = ~BP;
assign CP = (counterC < 3*STEP) ? 1 : 0;
assign CN = ~CP;
endmodule
```