console.c

Samsnug S3C2443 NAND Bootloader source code

//#include <stdio.h>
//#include <stdlib.h>
//#include <string.h>
//#include <ctype.h>

#include "Option.h"
#include "2443addr.h"
#include "System.h"


//===========================[ UART ]==============================

volatile unsigned int DebugUartCh=1;

void SelectDebugUart(unsigned int ch) // ch0 ~ ch3. added by junon 060530
{
	DebugUartCh = ch;
	if (ch>3) DebugUartCh = 1; // default UART channel 1
}


void InitDebugUart(unsigned int baud) // edited by junon 060530
{
	int ch;
 	UART_REGS *pUartRegs;
	
	// select UART function
	rGPHCON	&= ~((0xf<<12)|(0xf<<8)|(0xf<<4)|(0xf<<0));
	rGPHCON	|=  ((0xa<<12)|(0xa<<8)|(0xa<<4)|(0xa<<0));
 
	for (ch=0;ch<4;ch++)
	{
		pUartRegs = (UART_REGS *)(UART_REG_BASE+UART_REG_OFFSET*ch);	
		pUartRegs->rUlCon = 0x3; //Line control register : Normal,No parity,1 stop,8 bits
	     //    [10]       [9]     [8]        [7]        [6]      [5]         [4]           [3:2]        [1:0]
	     // Clock Sel,  Tx Int,  Rx Int, Rx Time Out, Rx err, Loop-back, Send break,  Transmit Mode, Receive Mode
	     //     0          1       0    ,     0          1        0           0     ,       01          01
	     //   PCLK       Level    Pulse    Disable    Generate  Normal      Normal        Interrupt or Polling
		pUartRegs->rUCon = 0x245; 
		//pUartRegs->rUbrDiv = ((int)(PCLK/16./baud+0.5)-1);   //Baud rate divisior register 0 
		pUartRegs->rUbrDiv = 26;   //Baud rate divisior register 0 
		pUartRegs->rUfCon = 0x0; //UART FIFO control register, FIFO disable
		pUartRegs->rUmCon = 0x0; //UART MODEM control register, AFC disable
	}
	
}
		
		
/*
int GetIntNum( void)
{
    char str[30];
    char *string = str;
    int base     = 10;
    int minus    = 0;
    int result   = 0;
    int lastIndex;    
    int i,j;
    
    gets(string);

	i=0; j=0;
	do {
		if (string[j]==0x8) {
			if (i>0)	i--; 
		} else 
			string[i++]=string[j];
	} while(string[j++]!=0);


    if(string[0]=='-') {
        minus = 1;
        string++;
    }
    
    if(string[0]=='0' && (string[1]=='x' || string[1]=='X')) {
        base    = 16;
        string += 2;
    }
    
    lastIndex = strlen(string) - 1;
    
    if(lastIndex<0)
        return -1;
    
    if(string[lastIndex]=='h' || string[lastIndex]=='H' ) {
        base = 16;
        string[lastIndex] = 0;
        lastIndex--;
    }

    if(base==10) {
        result = atoi(string);
        result = minus ? (-1*result):result;
    }
    else {
        for(i=0;i<=lastIndex;i++) {
            if(isalpha(string[i])) {
                if(isupper(string[i]))
                    result = (result<<4) + string[i] - 'A' + 10;
                else
                    result = (result<<4) + string[i] - 'a' + 10;
            }
            else
                result = (result<<4) + string[i] - '0';
        }
        result = minus ? (-1*result):result;
    }
    return result;
}

*/

unsigned int Uart_putc(unsigned int c) // edited by junon 060530
{
 	UART_REGS *pUartRegs;

	pUartRegs = (UART_REGS *)(UART_REG_BASE+UART_REG_OFFSET*DebugUartCh);	

	if(c=='\n') {
		while(!(pUartRegs->rUtrStat & 0x2));
		pUartRegs->rUtxh = '\r';
	}
	while(!(pUartRegs->rUtrStat & 0x2));	 //Wait until THR is empty.
	pUartRegs->rUtxh = c;
	return c;
}

int Uart_puts( const char *s)
{
	while(*s!=0) Uart_putc( *s++);
	return 0;	
}


unsigned int Uart_getc(void) // edited by junon 060530
{
	unsigned int chRx; 
 	UART_REGS *pUartRegs;

	pUartRegs = (UART_REGS *)(UART_REG_BASE+UART_REG_OFFSET*DebugUartCh);	
	
	while(!(pUartRegs->rUtrStat & 0x1)); //Receive data ready
	chRx = pUartRegs->rUrxh;

	return chRx; 
}


//===========================[ BOARD LED ]================================

void Init_LED(void) // edited by junon 060522
{
	// LED1,2,4,8 -> EINT4,5,6,7 = GPF4,5,6,7 in SMDK2443
    rGPFCON	= (rGPFCON&~(0xff<<8))|(0x55<<8); // output
    rGPFUDP	&= ~(0xaa<<8); // pull-up/down disable
}

void Led_Display(int data) 
{
    rGPFDAT = (rGPFDAT & ~(0xf<<4)) | ((data & 0xf)<<4) ;
}


//===========================[ Initializing Console ]================================

void Console(void) // edited by junon 060530
{
	SelectDebugUart(1); // ch0 ~ ch3
	InitDebugUart(115200); 
	SetResTDelay(1000); // Resolution of TDelay is 1000us=1ms
	InitTDelayFunc();

}