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parameter ClkFrequency = 25000000; // 25MHz
parameter Baud = 115200;
parameter RegisterInputData = 1; // in RegisterInputData mode, the input doesn't have to stay valid while the character is been transmitted
// Baud generator
parameter BaudGeneratorAccWidth =16;
reg [BaudGeneratorAccWidth:0] BaudGeneratorAcc;
`ifdef DEBUG
wire [BaudGeneratorAccWidth:0] BaudGeneratorInc = 17'h10000;
`else
wire [BaudGeneratorAccWidth:0] BaudGeneratorInc = ((Baud<<(BaudGeneratorAccWidth-4))+(ClkFrequency>>6))/(ClkFrequency>>5);
`endif
wire BaudTick = BaudGeneratorAcc[BaudGeneratorAccWidth];
wire TxD_busy;
always @(posedge clk) if(TxD_busy) BaudGeneratorAcc <= BaudGeneratorAcc[BaudGeneratorAccWidth-1:0] + BaudGeneratorInc;
这段是25MHZ产生115200波特率的代码 如果改成30MHZ 如何修改使产生115200的波特率呢?跪求指导 |
阿莫论坛20周年了!感谢大家的支持与爱护!!
曾经有一段真挚的爱情摆在我的面前,我没有珍惜,现在想起来,还好我没有珍惜……
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