uart.h

LPC2119读写SD卡源代码。用C语言编写

/* *****************************************************************************
 * based on software from:
 * Copyright 2004, R O SoftWare
 * No guarantees, warrantees, or promises, implied or otherwise.
 * May be used for hobby or commercial purposes provided copyright
 * notice remains intact.
 * 
 * reduced to learn what has to be done to enable and use UART0
 *****************************************************************************/
#ifndef INC_UART_H
#define INC_UART_H

#include "typedefs.h"

#include <lpc2119.h>
#include "lpcUART.h"
#include "config.h"

///////////////////////////////////////////////////////////////////////////////
// use the following macros to determine the 'baud' parameter values
// for uart0Init() and uart1Init()
// CAUTION - 'baud' SHOULD ALWAYS BE A CONSTANT or
// a lot of code will be generated.
// Baud-Rate is calculated based on pclk (VPB-clock)
// the devisor must be 16 times the desired baudrate
#define UART_BAUD(baud) (U16)(((FOSC*PLL_M/VPBDIV_VAL) / ((baud) * 16.0)) + 0.5)

///////////////////////////////////////////////////////////////////////////////
// Definitions for typical UART 'baud' settings
#define B1200         UART_BAUD(1200)
#define B9600         UART_BAUD(9600)
#define B19200        UART_BAUD(19200)
#define B38400        UART_BAUD(38400)
#define B57600        UART_BAUD(57600)
#define B115200       UART_BAUD(115200)

///////////////////////////////////////////////////////////////////////////////
// Definitions for typical UART 'mode' settings
#define UART_8N1      (U08)(ULCR_CHAR_8 + ULCR_PAR_NO   + ULCR_STOP_1)
#define UART_7N1      (U08)(ULCR_CHAR_7 + ULCR_PAR_NO   + ULCR_STOP_1)
#define UART_8N2      (U08)(ULCR_CHAR_8 + ULCR_PAR_NO   + ULCR_STOP_2)
#define UART_7N2      (U08)(ULCR_CHAR_7 + ULCR_PAR_NO   + ULCR_STOP_2)
#define UART_8E1      (U08)(ULCR_CHAR_8 + ULCR_PAR_EVEN + ULCR_STOP_1)
#define UART_7E1      (U08)(ULCR_CHAR_7 + ULCR_PAR_EVEN + ULCR_STOP_1)
#define UART_8E2      (U08)(ULCR_CHAR_8 + ULCR_PAR_EVEN + ULCR_STOP_2)
#define UART_7E2      (U08)(ULCR_CHAR_7 + ULCR_PAR_EVEN + ULCR_STOP_2)
#define UART_8O1      (U08)(ULCR_CHAR_8 + ULCR_PAR_ODD  + ULCR_STOP_1)
#define UART_7O1      (U08)(ULCR_CHAR_7 + ULCR_PAR_ODD  + ULCR_STOP_1)
#define UART_8O2      (U08)(ULCR_CHAR_8 + ULCR_PAR_ODD  + ULCR_STOP_2)
#define UART_7O2      (U08)(ULCR_CHAR_7 + ULCR_PAR_ODD  + ULCR_STOP_2)

///////////////////////////////////////////////////////////////////////////////
// Definitions for typical UART 'fmode' settings
#define UART_FIFO_OFF (0x00)
#define UART_FIFO_1   (U08)(UFCR_FIFO_ENABLE + UFCR_FIFO_TRIG1)
#define UART_FIFO_4   (U08)(UFCR_FIFO_ENABLE + UFCR_FIFO_TRIG4)
#define UART_FIFO_8   (U08)(UFCR_FIFO_ENABLE + UFCR_FIFO_TRIG8)
#define UART_FIFO_14  (U08)(UFCR_FIFO_ENABLE + UFCR_FIFO_TRIG14)

void uart0Init(U16 baud, U08 mode, U08 fmode);
int uart0Putch(int ch);
U16 uart0Space(void);
const char *uart0Puts(const char *string);
int uart0TxEmpty(void);
void uart0TxFlush(void);
int uart0Getch(void);
void uart_sendchar(char c);


#endif