sysserial.c

Vxworks下BSP源码

/* sysSerial.c - Samsung SBC ARM7 serial device initialization */

/* Copyright 1984-2001 Wind River Systems, Inc. */
#include "copyright_wrs.h"

/*
modification history
--------------------
01c,10jul01,g_h  add #include "sngks32cSio.c" instead of the makefile
01b,26apr01,m_h  convert tabs to spaces for readability
01a,12apr01,m_h  created from snds100 template.
*/

/*
DESCRIPTION
This file contains the board-specific routines for serial channel
initialization of the Samsung SBC ARM7 development board.

INCLUDES:
sngks32cSio.h

SEE ALSO:
<Samsung KS32C50100 Microcontroller User's Manual>
*/


#include "vxWorks.h"
#include "iv.h"
#include "intLib.h"
#include "config.h"
#include "sysLib.h"
#include "sngks32cSio.h"

#include "wrSbcArm7.h"

#include "sngks32cSio.c"





/*void myDelay();*/

/* local defines  */

#ifndef AT91C_REG_READ
#define AT91C_REG_READ(reg, result) \
    ((result) = *(volatile UINT32 *)(reg))
#endif 

#ifndef AT91C_REG_WRITE
#define AT91C_REG_WRITE(reg, data) \
    (*((volatile UINT32 *)(reg)) = (data))
#endif 




/* device initialization structure */

typedef struct
    {
    UINT  intVector;
    UINT32 *baseAdrs;
    UINT  regSpace;
    UINT  intLevel;
	
    UINT32 *PIO_PDR;
    UINT32 *PIO_ASR;
    UINT32 value;	/*value for pio register*/

/*RS485*/
    char mode;/*rs485/232*/
    UINT32 pioBaseAdrs;
    UINT32 pinValue;	
    } ATARM920T_CHAN_PARAS;




/* Local data structures */

LOCAL ATARM920T_CHAN_PARAS devParas[] =
    {
      {INT_VEC_SYSIRQ, (UINT32 *)AT91C_DBGU_BASE_ADR, UART_REG_ADDR_INTERVAL,  INT_LVL_SYSIRQ,
	  (UINT32 *)AT91C_PIOA_PDR,(UINT32 *)AT91C_PIOA_ASR,AT91C_PA31_DTXD|AT91C_PA30_DRXD,
	MODE_RS232,0,0
	},
      {INT_VEC_US0, (UINT32 *)AT91C_US0_BASE_ADR, UART_REG_ADDR_INTERVAL, INT_LVL_US0,
      (UINT32 *)AT91C_PIOA_PDR,(UINT32 *)AT91C_PIOA_ASR,AT91C_PA17_TXD0 |AT91C_PA18_RXD0 ,
	MODE_RS485,AT91C_PIOB_BASE_ADR,AT91C_PIO14
	}
    };
 
LOCAL AT91C_CHAN at91cChan[N_ATARM920T_UART_CHANNELS];

/*
 * Array of pointers to all serial channels configured in system.
 * See sioChanGet(). It is this array that maps channel pointers
 * to standard device names.  The first entry will become "/tyCo/0",
 * the second "/tyCo/1", and so forth.
 */

SIO_CHAN * sysSioChans [] =
    {
    &at91cChan[0].sio, /* /tyCo/0 --debug*/
    &at91cChan[1].sio, /* /tyCo/1 --uart0*/
    };


/* forward declarations */

/******************************************************************************
*
* sysSerialHwInit - initialize the BSP serial devices to a quiesent state
*
* This routine initializes the BSP serial device descriptors and puts the
* devices in a quiesent state.  It is called from sysHwInit() with
* interrupts locked.
*
* RETURNS: N/A
*
* SEE ALSO: sysHwInit()
*/

void sysSerialHwInit (void)
    {
    int i;

    for (i = 0; i < N_ATARM920T_UART_CHANNELS; i++)
        {
        at91cChan[i].regDelta = devParas[i].regSpace;
        at91cChan[i].regs = devParas[i].baseAdrs;
        at91cChan[i].baudRate = CONSOLE_BAUD_RATE;
        at91cChan[i].intLevel = devParas[i].intLevel;
	at91cChan[i].UARTmode = devParas[i].mode;

	if(devParas[i].mode == MODE_RS485)
	{
		at91cChan[i].pioBaseAdrs = devParas[i].pioBaseAdrs;
		at91cChan[i].pinValue = devParas[i].pinValue;
	}

        /*
         * Initialize driver functions, getTxChar, putRcvChar and channelMode
         * and initialize UART
         */

        at91cDevInit(&at91cChan[i]);
        }
    }

/******************************************************************************
*
* sysSerialHwInit2 - connect BSP serial device interrupts
*
* This routine connects the BSP serial device interrupts.  It is called from
* sysHwInit2().  Serial device interrupts could not be connected in
* sysSerialHwInit() because the kernel memory allocator was not initialized
* at that point, and intConnect() may call malloc(). 
* 
* RETURNS: N/A 
*
* SEE ALSO: sysHwInit2()
*/

void sysSerialHwInit2 (void)
    {
    int i;


    for (i = 0; i < N_ATARM920T_UART_CHANNELS; i++)
        {
        /*
         * Connect and enable the interrupt.
         * We would like to check the return value from this and log a message
         * if it failed. However, logLib has not been initialized yet, so we
         * cannot log a message, so there's little point in checking it.
         */

	AT91C_REG_WRITE(devParas[i].PIO_ASR,devParas[i].value);/*TX & RX --PIO pin set*/
	AT91C_REG_WRITE(devParas[i].PIO_PDR,devParas[i].value);

	if(devParas[i].mode == MODE_RS485)
	{
		*(volatile UINT32*)((UINT32)AT91C_PIOB_BASE_ADR + AT91C_PIO_PER) = devParas[i].pinValue;
		*(volatile UINT32*)((UINT32)AT91C_PIOB_BASE_ADR + AT91C_PIO_OER) = devParas[i].pinValue;
		*(volatile UINT32*)((UINT32)AT91C_PIOB_BASE_ADR + AT91C_PIO_CODR) = devParas[i].pinValue;	/*--RS485默认状态RX--*/
	}	

	if(i==0)
	{
        (void) intConnect (INUM_TO_IVEC(devParas[i].intVector),
                           sysIntHandler, (int) &at91cChan[i] );
	}
	else
	{
        (void) intConnect (INUM_TO_IVEC(devParas[i].intVector),
                           at91cInt, (int) &at91cChan[i] );
	}
	
	
	intEnable (devParas[i].intLevel);

        at91cDevInit2(&at91cChan[i]);/*Before this routine is called only polled mode operations should be allowed*/
        }



	
    }

/******************************************************************************
*
* sysSerialChanGet - get the SIO_CHAN device associated with a serial channel
*
* This routine returns a pointer to the SIO_CHAN device associated with
* a specified serial channel.  It is called by usrRoot() to obtain
* pointers when creating the system serial devices '/tyCo/x'.  It is also
* used by the WDB agent to locate its serial channel.
*
* RETURNS: A pointer to the SIO_CHAN structure for the channel, or ERROR
* if the channel is invalid.
*/

SIO_CHAN * sysSerialChanGet
    (
    int channel         /* serial channel */
    )
    {
    if (channel < 0 || channel >= (int)(NELEMENTS(sysSioChans)))
        return (SIO_CHAN *)ERROR;

    return sysSioChans[channel];
    }

/******************************************************************************
*
* sysSerialReset - reset the sio devices to a quiet state
*
* Reset all devices to prevent them from generating interrupts.
*
* This is called from sysToMonitor to shutdown the system gracefully before
* transferring to the bootroms.
*
* RETURNS: N/A.
*/

void sysSerialReset (void)
    {
    int i;

    for (i = 0; i < N_ATARM920T_UART_CHANNELS; i++)
        {
        /* disable serial interrupts */

        intDisable (devParas[i].intLevel);

        }
    }



#if 0

void myDelay()
{
	int i;
	
	*(volatile UINT32 *)0xfffff800 = 0x35;
	*(volatile UINT32 *)0xfffff810 = 0x35;
	
	while(1)
	{
	*(volatile UINT32 *)0xfffff834 = 0x35;/*lit*/
	
	for(i=0;i<1000000;i++);
	
	*(volatile UINT32 *)0xfffff830 = 0x35;
	
	for(i=0;i<1000000;i++);
	
	}
}
#endif