请师兄师弟们上传用FPGA产生PWM信号控制LED明暗的例程,最好加上注析,不胜感激....
module Led( clk, rst_n, out );
input clk, rst_n;
output out;
reg[5:0] out;
reg[15:0] count, pwm; //周期,脉宽
// PWM周期数累加
always @(posedge clk or negedge rst_n)
begin
if(!rst_n)
begin count <= 16'h0; end
else
begin count <= count + 1'b1; end
end
always @(posedge clk or negedge rst_n)
begin
if(!rst_n)
begin out <= 6'h3f; end
else
begin
if(count[15] == 1) //周期数清0
count <= 16'h0;
else
begin
if(count < pwm)
out <= 6'h3f;
else
out <= 6'h00;
end
end
end
always @(posedge count[14] or rst_n)
begin
if(!rst_n)
begin pwm <= 16'h0; end
else
begin
pwm <= pwm + 1'b1;
if(pwm[13] == 1)
begin
pwm <= 16'h0;
end
end
end
endmodule
module Led( clk, rst_n, out );
input clk, rst_n;
output out;
reg[5:0] out;
reg[15:0] count, pwm; //周期,脉宽
// PWM周期数累加
always @(posedge clk or negedge rst_n)
begin
if(!rst_n)
begin count <= 16'h0; end
else
begin count <= count + 1'b1; end
end
always @(posedge clk or negedge rst_n)
begin
if(!rst_n)
begin out <= 6'h3f; end
else
begin
if(count[15] == 1) //周期数清0
count <= 16'h0;
else
begin
if(count < pwm)
out <= 6'h3f;
else
out <= 6'h00;
end
end
end
always @(posedge count[14] or rst_n)
begin
if(!rst_n)
begin pwm <= 16'h0; end
else
begin
pwm <= pwm + 1'b1;
if(pwm[13] == 1)
begin
pwm <= 16'h0;
end
end
end
endmodule
无法编译,或有没有更好的例程,谢谢...
回复
我要赚赏金打赏帖 |
|
|---|---|
| PCF8574功能模块及其使用被打赏¥20元 | |
| 传感器LSM6DSO及LIS3MDL的功能检测被打赏¥18元 | |
| LPS25HB气压传感器及其检测被打赏¥18元 | |
| HTS221温湿度传感器及其检测被打赏¥18元 | |
| 【S32K3XX】HSE FW 版本更新被打赏¥21元 | |
| 基于ArduinoUNO开发板的AT24C02读写测试被打赏¥16元 | |
| TCS3472S传感器及其色彩检测被打赏¥19元 | |
| 【S32DS】S32K3 RTD7.0.1 HSE 组件配置报错问题解决被打赏¥27元 | |
| 【S32K3XX】MCME 启动 CORE1被打赏¥23元 | |
| AG32VH407下温度大气压传感器及其检测被打赏¥20元 | |
我要赚赏金
