s3c2440 serial port debugging function-EEWORLD

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#include "2440addr.h"
#include
#include
#include
#include
#include
#define TXD0READY (1<<2)
#define RXD0READY (1)
#define UART_CLK 50000000 // Set the clock source of UART0 to PCLK
#define UART_BAUD_RATE 115200 // baud rate
#define UART_BRD ((UART_CLK / (UART_BAUD_RATE * 16)) - 1)
/*
* Initialize UART0
* 115200,8N1,no flow control
*/
void Uart0_Init(void)
{
rGPHCON |= 0xa0; // GPH2, GPH3 are used as TXD0, RXD0
rGPHUP = 0x0c; // GPH2, GPH3 internal pull-up
rULCON0 = 0x03; // 8N1 (8 data bits, no parity, 1 stop bit)
rUCON0 = 0x05; // Query mode, UART clock source is PCLK
rUFCON0 = 0x00; // Do not use FIFO
rUMCON0 = 0x00; // Do not use flow control
rUBRDIV0 = UART_BRD; // baud rate is 115200
}
/*
* Send a character
*/
void Send_Byte(unsigned char c)
{
/* Wait until all data in the send buffer has been sent out */
while (!(rUTRSTAT0 & TXD0READY));
/* Write data to the UTXH0 register and the UART will automatically send it out */
rUTXH0 = c;
}
/*
* Receive characters
*/
unsigned char Get_Byte(void)
{
/* Wait until there is data in the receive buffer */
while (!(rUTRSTAT0 & RXD0READY));
/* Directly read the URXH0 register to obtain the received data */
return rURXH0;
}
/*
* Determine whether a character is a number
*/
int isDigit(unsigned char c)
{
if (c >= '0' && c <= '9')
return 1;
else
return 0;
}
/*
* Determine whether a character is an English letter
*/
int isLetter(unsigned char c)
{
if (c >= 'a' && c <= 'z')
return 1;
else if (c >= 'A' && c <= 'Z')
return 1;
else
return 0;
}
void Uart0_SendString(char *pt)
{
while(*pt)
{
Send_Byte(*pt++);
}
}
void Uart_Printf(char *fmt,...)
{
va_list ap;
char string[256];
va_start(ap,fmt);
vsprintf(string,fmt,ap);
Uart0_SendString(string);
va_end(ap);
}

Keywords：s3c2440 Reference address：s3c2440 serial port debugging function

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