mdmport.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

/*
 * FILENAME: mdmport.c
 *
 * Copyright 1997- 2001 By InterNiche Technologies Inc. All rights reserved
 * Portions Copyright 1996 by NetPort Software. 
 *
 * This file contains the Port dependant portions of modem dialer & login 
 * code. In practice this rarely needs to be modified. 
 *
 *
 * MODULE: MODEM
 *
 * ROUTINES: dial_delay(), modem_portstat(), hangup(), modem_DCD(),
 *
 * PORTABLE: usually
 */


#include "mdmport.h"

#ifdef USE_MODEM /* whole file can be ifdeffed out */

#ifdef IN_MENUS
#include "menu.h"
#endif   /* IN_MENUS */

#ifdef INCLUDE_NVPARMS
#include "nvparms.h"
#endif   /* INCLUDE_NVPARMS */

#ifdef INCLUDE_NVPARMS
struct modem_nvparam modem_nvparms;
extern struct nvparm_format modem_format;
#endif   /* INCLUDE_NVPARMS */

#ifdef IN_MENUS
extern   int   dialer_status(void * pio);
extern   int   hangup (void * pio);
extern   int   direct_dial (void * pio);

struct menu_op modem_menu[] = {
   "modem",    stooges,   "Modem Commands",
   "hangup",   hangup,   "hang up (and reset) the modem",
/* the following line is a nice idea and the correct way to do this, however
 * the ARM SDT 2.50 C compiler botches the "if defined() && " operation. It
 * includes the following line even when PPP_MENU is NOT defined anywhere.
 * We have to use two seperate "ifdef" lines to force it to do the right
 * thing.
#if defined(USE_PPP) && defined(PPP_MENU) <- breaks ARM C !!!!
 */
#ifdef USE_PPP
#ifdef PPP_MENU
   "dialup",   direct_dial,    "dial up the modem",
#endif   /* PPP_MENU */
#endif   /* USE_PPP */

#ifdef NET_STATS
   "modem",   dialer_status,  "modem, dialer, and UART info",
#endif
   NULL,   NULL,   NULL,
   };
#endif   /* IN_MENUS */


/* FUNCTION: prep_modem()
 * 
 * PARAMS: NONE
 *
 * RETURNS: Error Code or 0 for OK
 */
int prep_modem(void)
{
int e = 0;

#ifdef IN_MENUS
   /* install the Modem Commands */
   install_menu(&modem_menu[0]);
#endif   /* IN_MENUS */

#ifdef INCLUDE_NVPARMS
   e = install_nvformat(&modem_format, nv_formats);
   if(e)
   {
      dprintf("unable to install Modem NVPARMS, reconfigure nv_formats[]\n");
      dtrap("mdmport 0\n");
   }
#else
   strcpy(mdm_dial_string, "YOUR_ISP_PHONE\n");
   strcpy(mdm_init_string, "AT&D0&C1\n");
#endif   /* INCLUDE_NVPARMS */

   return e;
}


/* FUNCTION: dial_delay()
 * 
 * Allow task loop to spin for N ticks without 
 * re-entring dialer code. This may need to be changed for RTOS
 * system ports.
 *
 * PARAM1: unsigned long ticks
 *
 * RETURNS: void
 */

void
dial_delay(unsigned long ticks)
{
#ifdef SUPERLOOP
unsigned long stoptime;

   in_dialcheck++;   /* keep tk_yield out of dial_check() */
   stoptime = cticks + ticks;   /* set time to exit dial_delay() */
   while(cticks < stoptime)
      tk_yield();      /* let tasks spin until time */
   in_dialcheck--;
#else /* not SUPERLOOP, do multitasking version */

   TK_SLEEP(ticks);  /* let tasking system do the delay */

#endif
}


/* FUNCTION: modem_portstat()
 * 
 * PARAM1: void * pio
 * PARAM2: MODEMP modemp
 *
 * RETURNS: void
 */

/* pointer to per-port UART stats routine */
int  (*port_uartstat)(void * pio, int unit) = NULL;

void
modem_portstat(void * pio, MODEMP modemp)
{
#ifdef PC_UART
unshort  port;
unshort  mask;   /* bit values read from MSR */

   port = (unshort)ubase + 6;
   mask = (u_char)inp(port);
   ns_printf(pio, "modem unit %d, DCD(%x): 0x%02x,  ", modemp->unit, port, mask);
   ns_printf(pio, "Lines(%x): 0x%02x\n", port, mask);
#else    /* unsupported UART */
   if(port_uartstat)      /* did init logic install a stats routine? */
      port_uartstat(pio, modemp->unit);  /* call it... */
   else
      ns_printf(pio, "Stats Not implemented for this UART\n");
#endif 
}

/* hangup() for use by demo's menu system */

int hangup(void *pio)
{
   USE_VOID(pio);
   return(modem_hangup(modems[0].upperline));
}


/* FUNCTION: modem_DCD()
 * 
 * Returns TRUE if Carrier detect is down, FALSE if up.
 *
 * PARAM1: MODEMP modemp
 *
 * RETURNS: TRUE if Carrier detect is down, FALSE if up.
 */


int
modem_DCD(MODEMP modemp)
{
#ifdef MDM_DCDLINE

   return (uart_getDCD(modemp->unit));

#else    /* no uart specific MDM_DCDLINE routine provided */
   /* stubbed out due to lack of DCD on many UART implementations. */
   if(modemp->upperline->ln_state == D_CONNECTED)
      return FALSE;
   else
      return TRUE;
#endif   /* MDM_DCDLINE or not... */
}

#ifdef INCLUDE_NVPARMS
/* Please see nvparms.h and nvparms.c regarding the usage of 
 * the following datatypes and functions.
 */

struct nvparm_info modem_nvformats[] = 
{
   {"Phone Number: %s\n", NVSTRING, MAX_NVSTRING, \
    &modem_nvparms.dial_phone[0], NULL, }, 
   {"Modem Init: %s\n"  , NVSTRING, MAX_NVSTRING, \
    &modem_nvparms.modem_init[0], NULL, }, 
};

#define NUMMODEM_FORMATS  \
        (sizeof(modem_nvformats)/sizeof(struct nvparm_info))

/* FUNCTION: modem_nvset()
 * 
 * PARAM1: NV_FILE * fp
 *
 * RETURNS: Silent return of 0 for OK
 */
int modem_nvset(NV_FILE * fp)
{
int i = 0;

   /* Modem / dialup section */
   nv_fprintf(fp, modem_nvformats[i++].pattern, modem_nvparms.dial_phone);
   nv_fprintf(fp, modem_nvformats[i++].pattern, modem_nvparms.modem_init);

   return 0;
}

struct nvparm_format modem_format = 
{
   NUMMODEM_FORMATS,
   &modem_nvformats[0],
   modem_nvset,
   NULL
};

#endif   /* INCLUDE_NVPARMS */

#endif   /* USE_MODEM */