uart.c

在ARM7和UC/OSII的平台上实现了GPS自动报站的功能,涉及GPS模块LEA_4S的驱动,位置速寻算法,语音芯片ISD4004的录放音驱动,LED页面管理等等.从启动代码到操作系统的移植以及到业

#include "includes.h"
#include "ipport.h"
#include "dlcs.h"
#include "at_core.h"
#include "uart_drv.h"
#ifdef dputchar
#undef dputchar
#endif

#define UART_KB             1
#define BAUD_KB             57600L


int
uart_init(int unit)
{
   unit = unit;
/* uarts_init(UART_MODEM, BAUD_MODEM);*/
   return 0;   /* OK return */
}


/*  void uart_putc(unit, char) - puts a byte out serial port.

    Returns 0 in AX if OK, else -1 if RDY timeout.
*/

int
uart_putc(int unit, u_char outchar)
{
   unit = unit;
/* uarts_write(UART_MODEM, outchar);*/
   WriteBytetoDLC(DLC_GPRS, outchar);
   return 0;
}


/*	uart_getc() - get the next character from the uart input buffer.
 Returns a 16 or 32 bit value. If a char is ready, the upper  bits are zero
 and the lower 8 bits have the byte value. If no char is ready, all bits
 are SET (ie, 16 bit value is 0xFFFF)
*/

int
uart_getc(int unit)
{
   unit = unit;
/* return uarts_read(UART_MODEM);*/
   return ReadBytefromDLC(DLC_GPRS);
}


/* uart_ready() - Returns true (0xFFFF) if UART is ready to send 
 a character, FALSE (0) if not. This allows a non-blocking UART send
 routine to be written in C.
*/

int
uart_ready(int unit)
{
   unit = unit;
/* return uarts_ready(UART_MODEM);*/
   if (CanWriteDLC(DLC_GPRS)) return -1;
   else return 0;
}

/* void uart_close(void) - shut down UART */
void uart_close(int unit)
{
   unit = unit;
   //dprintf("uart_close!");
}


int
uart_stats(void * pio, int unit)
{
   pio  = pio;
   unit = unit;
   return 0;
}



void 
initkb(void)
{
/*#if EN_LCD == 0
   uarts_init(UART_KB, BAUD_KB);
#endif	*/
}


/* dputchar() - this is the port-dependant portion of the ttyio system.
 * Output to dprintf() ends up here. 

   For the Samsung board, we use UART 0. 

*/

void
dputchar(int c)   /* char to send to dstdio */
{
#if EN_LCD == 0
    if (c == '\n') {
      SendFromUART_BYTE(UART_KB, 0x0d);
      SendFromUART_BYTE(UART_KB, 0x0a);
     //   uarts_write(UART_KB, 0x0d);
   //     uarts_write(UART_KB, 0x0a);
    } else {
        SendFromUART_BYTE(UART_KB, c);
 //       uarts_write(UART_KB, c);
    }
#else
    c = c;
#endif	
}

int
kbhit(void)
{
#if EN_LCD == 0
  // if (uarts_recv(UART_KB)) return -1;
  // else 
  return 0;
#else
   return 0;
#endif	
}

int
getch(void)
{
#if EN_LCD == 0
   return -1;

   return uarts_read(UART_KB);
#else
   return -1;
#endif	
}