求sh79f084 串口demo

2万 · 2022-8-6 14:38

求sh79f084 串口demo，sh79f084 串口用T2定时器，没成功。哪里不对？

void Init_Timer2(void)
{
      EA=0;
      //Enter_Bank1;
      T2CON       =       Bin(00110000);

      TL2 = (65536-16600000/32/2400) & 0x00ff;
TH2 = ((65536-16600000/32/2400)>>8)&0x00ff;
      TF2       =       0;                                              //
      TR2       =       1;                                              // 开启定时器2

      //IEN0       |=       Bin(00010000);       //EUART
      //IEN1       =       Bin(00000000);
      //Enter_Bank0;
      ET2 = 0;

      EA       =       1;                                                       //开启全中断
}
void EUART_Init(void)
{
      EA=0;
      //Enter_Bank0;

      PCON =Bin(00000000);
      SCON       =       Bin(01010000);                      //       方式1
      RI=0;

      TI=0;
      REN=1;                         //打开串口0接收中断
   ES0 =1;                         //使能UART0中断

      EA       =       1;
}

只看该作者 · 2022-8-6 14:40

感谢楼主的分享，不错的代码，楼主是高手。

1万 · 2022-8-6 14:49

void Uart_Config(u16 baud)
{
u32 tmp;
u8 T2RH = 0; //T2重载值的高字节
u8 T2RL = 0; //T2重载值的低字节

tmp = SYS_MCLK / 32 / baud;
tmp = 65536 - tmp;
T2RH = (u8)(tmp >> 8);
T2RL = (u8)tmp;

PCON &= 0xBF;       //X0XX XXXX D6 = 0,SCON[7:5]工作方式SM0 SM1 SM2
SCON = 0x50;       //0101 0000 方式1，波特率为系统时钟的1/12
RCAP2L = T2RL;
RCAP2H = T2RH;
T2MOD &= 0x00;
T2MOD |= 0x01;
T2CON |= 0x34;  //0011 0000 使用T2溢出率作为波特率发生器开始T2
ES0 = 1;
}