uart.h

em86xx 完整启动程序,支持网络下载与串通下载

/*****************************************
 Copyright (c) 2002-2004
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the EM86XX boot loader */

#ifndef __BOOTLOADER_UART_H
#define __BOOTLOADER_UART_H

#include "version.h"
#include "emhwlib_registers.h"

/* 
 * UART Registers 
 */
#define UART0_BASE              (REG_BASE_cpu_block + CPU_UART0_base)
#define UART1_BASE              (REG_BASE_cpu_block + CPU_UART1_base)

#define UART_RBR                CPU_UART_RBR
#define UART_TBR                CPU_UART_THR
#define UART_IER                CPU_UART_IER
#define UART_IIR                CPU_UART_IIR
#define UART_FCR                CPU_UART_FCR
#define UART_LCR                CPU_UART_LCR
#define UART_MCR                CPU_UART_MCR
#define UART_LSR                CPU_UART_LSR
#define UART_MSR                CPU_UART_MSR
#define UART_SCRATCH            CPU_UART_SCR
#define UART_CLKDIV             CPU_UART_CLKDIV
#define UART_CLKSEL             CPU_UART_CLKSEL

/* Line Control Register */
#define UART_LCR_SBC            0x40    /* Set break control */
#define UART_LCR_SPAR           0x20    /* Stick parity (?) */
#define UART_LCR_EPAR           0x10    /* Even parity select */
#define UART_LCR_PARITY         0x08    /* Parity Enable */
#define UART_LCR_STOP           0x04    /* Stop bits: 0 = 1 stop bit, 1 = 2 stop bits */
#define UART_LCR_WLEN5          0x00    /* Wordlength: 5 bits */
#define UART_LCR_WLEN6          0x01    /* Wordlength: 6 bits */
#define UART_LCR_WLEN7          0x02    /* Wordlength: 7 bits */
#define UART_LCR_WLEN8          0x03    /* Wordlength: 8 bits */

#define UART_LCR_N81            0x03    /* None, 8 bit, 1 bit */
#define UART_PARITY_NONE        0x00
#define UART_PARITY_ODD         0x08
#define UART_PARITY_EVEN        0x18

// default configuration
// #define DEFAULT_UART_PORT        0
// #define DEFAULT_UART_BAUDRATE    38400               // 300, 1200, 2400, 4800, 9600,
                                                    // 19200, 38400, 57600, 115200, 230400
#define DEFAULT_UART_DATABITS   8                   // 5 - 8
#define DEFAULT_UART_STOPBITS   1                   // 1 - 2
#define DEFAULT_UART_PARITY     UART_PARITY_NONE    // none, even, odd

//
// function prototypes
//

// initialization
void uart_init(void);
void uart_init_port(int port, int baudrate, int fifo);
void uart_reset(void);

// output
void uart_putc(int ch);
void uart_puts(const char *t);
void uart_putns(const char *t, int maxlen);
//int uart_printf(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
int uart_printf(const char *fmt, ...);

void uart_printbyte(unsigned int data);
void uart_printshort(unsigned int data);
void uart_printlong(unsigned int data);
void uart_printint(int data);

// input
enum { GETSTR_ESCAPE = 0x01, GETSTR_APPEND = 0x02, GETSTR_APPENDDISP = 0x04};

int uart_peekc(void);
int uart_getc(void);
void uart_ungetc(int ch);
char *uart_gets_raw(char *str, int maxlen);
char *uart_gets(char *str, int maxlen, int flag);
char *uart_getcmd(char *str);

// macro
#define PAUSE { char tmpstr[256]; uart_puts("(pause)\n"); uart_gets_raw(tmpstr, sizeof tmpstr); }

#endif  // __BOOTLOADER_UART_H