S3C2440 Uart (miniARM 2440 )

1. #ifndef UART_H
2. #define UART_H
4. #include "2440addr.h"
6. void UartInit(u32 baud);
7. void UartSendChar(u8 c);
8. void UartSendStr(char *str);
9. char UartGetChar(void);
10. void UartPrintf(char *fmt,...);
12. #endif

uart.c

[cpp]

1. #include "uart.h"
3. void UartInit(u32 baud)
4. {
5. rUBRDIV0 = (int)(PCLK/baud/16.0)-1;
6. // rULCON0:
7. //bit7 Reserved
8. //bit6 Infrared Mode
9. // 0 = Normal
10. // 1 = Infrared
11. //bit5:3 Parity Mode
12. // 0xx = No Parity
13. // 100 = ODD Parity
14. // 101 = EVEN Parity
15. // 110 = Parity Forced / Checked as 1
16. // 111 = Parity Forced / Checked as 0
17. //bit2 number Of Stop bit
18. // 0 = one stop bit per frame
19. // 1 = two stop bit per frame
20. //bit1:0 Word Length
21. // 00 = 5bits 01 = 6bits
22. // 10 = 7bits 11 = 8bits
23. rULCON0 = 0x03;
24. rUCON0 = 0x245;
25. }
26. void UartSendChar(u8 c)
27. {
28. while(! (rUTRSTAT0 &0x02));
29. rUTXH0 = c;
31. }
32. void UartSendStr(char *str)
33. {
34. while(*str !='/0')
35. UartSendChar(*str++);
36. }
37. char UartGetChar(void)
38. {
39. while(!(rUTRSTAT0 & 0x01));
40. return rURXH0;
42. }
43. void UartPrintf(char *fmt,...)
44. {
45. va_list ap;
46. char string[256];
48. va_start(ap,fmt);
49. vsprintf(string,fmt,ap);
50. UartSendStr(string);
51. va_end(ap);
52. }