lib_44b0.c

44B0板子的检测程序 包括键盘 LED LCD SEG

#include "s3c44b0.h"
#include "lib_44b0.h"

/****************
 System functions
 ****************/
void cpu_init()
{
    //gpa is no need to change
    //gpb is no need to change
    //gpc GPC0-7 nDACK1 nDREQ1 GPC10-11 TXD1 RXD1 GPC14-15
    rPDATC=0x00;
    rPCONC=0x5F5F5555;
    //gpd output
    rPDATD=0x00;
    rPCOND=0x5555;
    //gpe0 output
    //gpe1-2 uart
    //gpe3-7 output
    //gpe8 CODECLK
    //pcone: 10 0101 0101 0110 1001
    rPCONE=0x25569;
    //gpf0-1 output
    //gpf2 unused
    //gpf3-4 nDACK0 nDREQ0
    //gpf5-8 IIS
    //pconf: 100 100 100 100 11 11 01 01 01
    rPCONF=0x2493D5;
    //gpg0-3 interrupt input
    //gpg4-7 L3 output
    //rcong: 0101 0101 1111 1111
    rPCONG=0x55FF;
    rPDATG=0x0FFF;
    //rextint: - - - - - high
    rEXTINT=0x5555; // 0001
    rINTMOD=0x00; // irq
    serial_set();
    serial_flush();
    CLEAR_PEND_ALL;
    INT_ENABLE(26); // global
    //INT_ENABLE(25); // eint0
    //INT_ENABLE(13); // timer0
    //INT_ENABLE(12); // timer1
}

/****************
 Serial functions
 ****************/
void serial_set(void)
{
    int i;
    /* Locate UART to GPIO */
    //PCONE = 0x? Do it in gpio_set()
    /* FIFO enable, Tx/Rx FIFO clear */
    rUFCON0 = 0x07;
    rUMCON0 = 0x0;
    /* Normal,No parity,1 stop,8 bit */
    rULCON0 = 0x03;
    /* Normal: interrupt or polling */
    rUCON0 = 0x05; //??0x245
    rUBRDIV0 = 21; //115200 while Fcpu = 40MHz
    for (i=0; i<100; i++);
}

void serial_flush(void)
{
    int i;
    /* FIFO enable, Tx/Rx FIFO clear */
    rUFCON0 = 0x07;
    for (i=0; i<100; i++);
}


char serial_getc (void)
{
    while (!(rUTRSTAT0 & 0x1));
    return rURXH0 & 0xFF;
}

void serial_putc (const char c)
{
    while (!(rUTRSTAT0 & 0x2));
    rUTXH0 = c;
}

char serial_tstc (void)
{
    return rUTRSTAT0 & 0x1;
}

void serial_puts (char *s)
{
    while (*s!=0x00)
    {
        serial_putc(*s);
        if ((*s)=='\n') serial_putc('\r');
        s++;
    }
}

void serial_gets (char *s)
{
    char *c;
    c=s;
    *s=0x00;
    while (*s!=0x0D)
    {
        *s=serial_getc();
        *s=*s&0x7F;
        if (*s!=0x08)
        {
            serial_putc(*s);
            s++;
        }
        else if (c!=s)
        {
            serial_putc(0x08);
            serial_putc(0x20);
            serial_putc(0x08);
            s--;
        }
    }
    serial_putc(0x0A);
    *s=0x00;
}

void serial_puth (unsigned int *h)
{
    unsigned int t;
    char c;
    int i;
    t=*h;
    serial_putc('0');
    serial_putc('x');
    for (i=28;i>=0;i-=4)
    {
         c=((t>>i)&0x0F)+0x30;
         if (c>0x39) c+=0x07;
         serial_putc(c);
    }
}

void serial_geth (unsigned int *h)
{
    unsigned int t;
    char c;
    char b[14];
    int i,j;
    i=0;
    c=0x00;
    while ((c!=0x0D)&&(i!=12))
    {
        c=serial_getc();
        c=c&0x7F;
        if (c!=0x08)
        {
            serial_putc(c);
            b[i]=c;
            i++;
        }
        else if (i!=0)
        {
            serial_putc(0x08);
            serial_putc(0x20);
            serial_putc(0x08);
            i--;
        }
    }
    if ((i==12)&&(c!=0x0D)) serial_putc(0x0D);
    serial_putc(0x0A);
    t=0;
    for (j=0;j<i;j++)
    {
        if ((b[j]==0x58)||(b[j]==0x78)) t=0; // 'x' and 'X'
        if (b[j]>0x39) b[j]-=0x07;
        if ((b[j]>=0x30)&&(b[j]<=0x3F)) t=(t<<4)+((b[j]-0x30)&0x0F);
    }
    *h=t;
}