JAPAN "RTOS technology that learns with TOPPERS"

#ifndef _HW_SERIAL_H_
#define _HW_SERIAL_H_

/*
 *  僞乕僎僢僩埶懚僔儕傾儖I/O儌僕儏乕儖乮GBA梡乯
 *  SIO傪巊梡
 */

#include "witz_gba.h"
#include "sys_defs.h"
#include "sys_config.h"


/*
 *  僔儕傾儖I/O偺妱崬傒僴儞僪儔偺儀僋僞斣崋
 */
#define INHNO_SERIAL IRQ_NUMBER_SIO

/*
 *  僔儕傾儖億乕僩偺僴乕僪僂僃傾埶懚忣曬偺掕媊
 *  Not yet! m68k偺傛偆偵僐儞僩儘乕儖丒儗僕僗僞傪峔憿懱偵偡傞
 */
typedef struct hardware_serial_port_descripter {
    INT   *initflag;     /* 弶婜壔嵪僼儔僌傊偺億僀儞僞   */
    BOOL  sendflag;      /* 憲怣妱傝崬傒僀僱乕僽儖丒僼儔僌 */
} HWPORT;

/*
 *  掅儗儀儖億乕僩忣曬娗棟僽儘僢僋偺弶婜抣
 */

#define NUM_PORT    1   /* 僒億乕僩偡傞僔儕傾儖丒億乕僩偺悢 */
static INT  initflag[1] = { 0 } ;   /* 弶婜壔嵪僼儔僌 */
#define HWPORT1 { &initflag[0],  0 }


/*
 *  僔儕傾儖I/O億乕僩偺弶婜壔
 */
Inline BOOL
hw_port_initialize(HWPORT *p)
{
    *SIORCNT = UM_ON;
    *SIOSCCNT = UM_BR9600 | UM_DATA_8 | UM_RECV_ENA
                    | UM_UART_ON |UM_IRQ_ON;
    *INTIE |= IRQ_BIT_SIO;

    *(p->initflag) = 1;         /* 弶婜壔僼儔僌愝掕 */
    return(FALSE);
}


/*
 *  僔儕傾儖I/O億乕僩偺廔椆
 */
Inline void
hw_port_terminate(HWPORT *p)
{
    *(p->initflag) = -1;        /* 弶婜壔僼儔僌愝掕           */
    *SIOSCCNT = 0;   /* Disable Interrupt */    
}


/*
 *  僔儕傾儖丒億乕僩妱崬傒僒乕價僗丒儖乕僠儞乮慜曽嶲徠乯
 */
extern void serial_handler_in(int portid);
extern void serial_handler_out(int portid);



/*
 *  僔儕傾儖I/O億乕僩偺妱崬傒僴儞僪儔
 */
Inline void
hw_serial_handler()
{
    if(*SIOSCCNT & UM_SD_FULL){
        if (initflag[0] > 0){
            serial_handler_out(1);
        }
        else{
        }
    }

    if(!(*SIOSCCNT & UM_RD_EMPTY)){
        if (initflag[0] > 0){
            serial_handler_in(1);
        }
        else{
        }
    }

    if(*SIOSCCNT & UM_ERR_FULL){
    }
}


/*
 *  暥帤傪庴怣偟偨偐丠
 */
Inline BOOL
hw_port_getready(HWPORT *p)
{
    return((*SIOSCCNT & UM_RD_EMPTY)!=0);
}


/*
 *  暥帤傪憲怣偱偒傞偐丠
 */
Inline BOOL
hw_port_putready(HWPORT *p)
{
    return((*SIOSCCNT & UM_SD_FULL)!=0);
}


/*
 *  庴怣偟偨暥帤偺庢傝弌偟
 */
Inline byte
hw_port_getchar(HWPORT *p)
{
    return(*SIOSIODATA);         
}


/*
 *  憲怣偡傞暥帤偺彂偒崬傒
 */
Inline void
hw_port_putchar(HWPORT *p, byte c)
{
    *SIOSIODATA=c;
}


/*
 *  憲怣惂屼娭悢
 */
Inline void
hw_port_sendstart(HWPORT *p)
{
    if (!(p->sendflag)) {
        *SIOSCCNT |= UM_SEND_ENA;
        /* Enable Interrupt */        
        p->sendflag = 1;
    }
}


Inline void
hw_port_sendstop(HWPORT *p)
{
    if (p->sendflag) {
        *SIOSCCNT &= ~UM_SEND_ENA;
       /* Disable Interrupt */
        p->sendflag = 0;
    }
}

#endif /* _HW_SERIAL_H_ */