44b0串口编程

ehyyngp

①串口的编程很简单，设置好四个引脚就好了

1. rPCONE |= (2<<2)|(2<<4); //rxd txd
   
2. 
   
3.            //rPCONE |= (0x01<<2)|(0x01<<4); //rxd txd 第一次竟然写成了这个
   
4. 
   
5.            rPDATG &= ~BIT1; //RTS 为0请求接收；
   
6. 
   
7.            rPCONG |= (1<<2);

这样串口就能通讯了

②中断方式发送数据
    设置要点：串口寄存器，中断寄存器，中断函数

1. rULCON0=0x3; //Normal,No parity,1 stop,8 bit
   
2. 
   
3.     rUCON0=0x045; //0000,0100,0101。rx=edge,tx=level,disable timeout int.,enable rx error int.,normal,interrupt or polling
   
4. 
   
5. 
   
6. Uart_Printf("\nTest begin:!");
   
7. uart0TxStr="UART0 Tx interrupt test is good!!!!\r\n";
   
8. 
   
9. pISR_UTXD0 = (unsigned)Uart0_TxInt;
   
10. rINTCON = 0;
    
11. rINTMSK =~ (BIT_GLOBAL|BIT_UTXD0);
    
12. rINTMOD = 0;

 

③DMA方式发送数据
    设置要点：串口寄存器，DMA寄存器

1. rUCON0 = 0x245; //for BDMA0
   
2. 
   
3. 
   
4. Uart_Printf("\n[Uart0 Tx Test by BDMA0]\n");
   
5. uart0TxStr="UART0 Tx Test by BDMA0 is good!!!!\r\n";
   
6. //Uart_TxEmpty(0);
   
7. 
   
8. 
   
9. rUCON0=0x48; //tx:BDMA0 rx:disable
   
10. 
    
11. 
    
12. rBDICNT0=0x0;
    
13. rBDCON0 =0x0;
    
14. rBDISRC0=(unsigned int)uart0TxStr|(0<<30)|(1<<28); // byte,inc
    
15. 
    
16. rBDIDES0=UTXH0 |(1<<30)|(3<<28); //L/B endian,M2IO,fix
    
17. 
    
18. rBDICNT0=strlen((char *)uart0TxStr)|(2<<30)|(1<<26)|(0<<20); //UART0,
    
19. 
    
20. rBDICNT0 |= (1<<20); //enable
    
21. 
    
22. rBDCON0 = (0x0<<2);