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??Vivado??PWM???

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??Vivado IDE??????????

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?????PYNQ-Z2

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???????PWM????????PS???PWM???????????????AXI??????????PWM??????

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• ????PWM??
• ??16???????????
• 1???????
• 4????????

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• period????????clk/f
• h_time????????????h_time = period * D
• pwm???PWM??
• CNT?????????PWM??

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??Lite???????????????????

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????????PWM????????????

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• period??????????PWM??
• h_time?????????????
• en???????
• pwm_out0???PWM0
• pwm_out1???PWM1

????

// pwm_gen.v
timescale 1ns / 1ps
module pwm_gen(
    input clk,
    input rst,
    input en,
    input [15:0] period,
    input [15:0] h_time,
    output reg pwm
);
reg [31:0] CNT;
always @(posedge clk or negedge rst) begin
    if (!rst) {
        CNT <= 0;
    } else if (CNT >= period-1 || en == 0) {
        CNT <= 0;
    } else {
        CNT <= CNT + 1'b1;
    }
end
always @(posedge clk or negedge rst) begin
    if (!rst) {
        pwm <= 0;
    } else begin
        if (en == 0) {
            pwm <= 0;
        } else begin
            if (CNT <= h_time-1) {
                pwm <= 1;
            } else {
                pwm <= 0;
            }
        end
    end
end
endmodule

IP???

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??????PWM????????????????

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??PWM?????????AXI???

??IP?

??????????re_pakage -IP??PWM????????????

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???????PWM????????????

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??PWM????????????

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?????????????PWM????????

SDK??

??SDK

?PWM????????SDK???????????

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????????PWM???????????????

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????????PWM???????????????

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• ????????4??
• ??PWM???????
• ????????

?????????????????????PWM??????

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