[已解决]能否查看CVAVR里函数的源代码[答案是不能的]
能否查看CVAVR里函数的源代码那时我搜索了lcd.h可惜只给出这些代码
[#ifndef _LCD_INCLUDED_
#define _LCD_INCLUDED_
#pragma used+
void _lcd_ready(void);
void _lcd_write_data(unsigned char data);
// write a byte to the LCD character generator or display RAM
void lcd_write_byte(unsigned char addr, unsigned char data);
// read a byte from the LCD character generator or display RAM
unsigned char lcd_read_byte(unsigned char addr);
// set the LCD display positionx=0..39 y=0..3
void lcd_gotoxy(unsigned char x, unsigned char y);
// clear the LCD
void lcd_clear(void);
void lcd_putchar(char c);
// write the string str located in SRAM to the LCD
void lcd_puts(char *str);
// write the string str located in FLASH to the LCD
void lcd_putsf(char flash *str);
// initialize the LCD controller
unsigned char lcd_init(unsigned char lcd_columns);
#pragma used-
#pragma library lcd.lib
#endif
]
难道我们不能查看里面函数里的代码吗,对于我们的移植不是很方便啊!我想知道一下,有什么方法可以查看函数的源码! 不能. 可以看见汇编代码，但是我不会使汇编，觉得很难。 可以整理出汇编的源代码,但需要具备一定的能力,不仅仅是掌握AVR的汇编. 可以啊,在cvavreval\lib里面就有
/* LCD driver routines
CodeVisionAVR C Compiler
(C) 1998-2007 Pavel Haiduc, HP InfoTech S.R.L.
*/
#asm
.equ __lcd_direction=__lcd_port-1
.equ __lcd_pin=__lcd_port-2
.equ __lcd_rs=0
.equ __lcd_rd=1
.equ __lcd_enable=2
.equ __lcd_busy_flag=7
#endasm
#pragma used+
static unsigned char _base_y={0x80,0xc0};
unsigned char _lcd_x,_lcd_y,_lcd_maxx;
#pragma used-
static void _lcd_delay(void)
{
#asm
ldi r31,15
__lcd_delay0:
dec r31
brne__lcd_delay0
#endasm
}
void _lcd_ready(void)
{
#asm
in r26,__lcd_direction
andir26,0xf ;set as input
out __lcd_direction,r26
sbi __lcd_port,__lcd_rd ;RD=1
cbi __lcd_port,__lcd_rs ;RS=0
__lcd_busy:
#endasm
_lcd_delay();
#asm
sbi __lcd_port,__lcd_enable ;EN=1
#endasm
_lcd_delay();
#asm
in r26,__lcd_pin
cbi __lcd_port,__lcd_enable ;EN=0
#endasm
_lcd_delay();
#asm
sbi __lcd_port,__lcd_enable ;EN=1
#endasm
_lcd_delay();
#asm
cbi __lcd_port,__lcd_enable ;EN=0
sbrcr26,__lcd_busy_flag
rjmp__lcd_busy
#endasm
}
static void _lcd_write_nibble(void)
{
#asm
andir26,0xf0
or r26,r27
out __lcd_port,r26 ;write
sbi __lcd_port,__lcd_enable ;EN=1
#endasm
_lcd_delay();
#asm
cbi __lcd_port,__lcd_enable ;EN=0
#endasm
_lcd_delay();
}
void _lcd_write_data(unsigned char data)
{
#asm
cbi__lcd_port,__lcd_rd ;RD=0
in r26,__lcd_direction
ori r26,0xf0 | (1<<__lcd_rs) | (1<<__lcd_rd) | (1<<__lcd_enable) ;set as output
out __lcd_direction,r26
in r27,__lcd_port
andir27,0xf
ld r26,y
#endasm
_lcd_write_nibble(); //RD=0, write MSN
#asm
ld r26,y
swapr26
#endasm
_lcd_write_nibble(); //write LSN
#asm
sbi __lcd_port,__lcd_rd ;RD=1
#endasm
}
/* write a byte to the LCD character generator or display RAM */
void lcd_write_byte(unsigned char addr, unsigned char data)
{
_lcd_ready();
_lcd_write_data(addr);
_lcd_ready();
#asm
sbi __lcd_port,__lcd_rs ;RS=1
#endasm
_lcd_write_data(data);
}
static void _lcd_read_nibble(void)
{
#asm
sbi __lcd_port,__lcd_enable ;EN=1
#endasm
_lcd_delay();
#asm
in r30,__lcd_pin ;read
cbi __lcd_port,__lcd_enable ;EN=0
#endasm
_lcd_delay();
#asm
andir30,0xf0
#endasm
}
static unsigned char lcd_read_byte0(void)
{
_lcd_delay();
_lcd_read_nibble(); // read MSN
#asm
mov r26,r30
#endasm
_lcd_read_nibble(); // read LSN
#asm
cbi __lcd_port,__lcd_rd ;RD=0
swapr30
or r30,r26
#endasm
}
/* read a byte from the LCD character generator or display RAM */
unsigned char lcd_read_byte(unsigned char addr)
{
_lcd_ready();
_lcd_write_data(addr);
_lcd_ready();
#asm
in r26,__lcd_direction
andir26,0xf ;set as input
out __lcd_direction,r26
sbi __lcd_port,__lcd_rs ;RS=1
#endasm
return lcd_read_byte0();
}
/* set the LCD display position x=0..39 y=0..3 */
void lcd_gotoxy(unsigned char x, unsigned char y)
{
_lcd_ready(); // RS=0
_lcd_write_data(_base_y+x);
_lcd_x=x;
_lcd_y=y;
}
// clear the LCD
void lcd_clear(void)
{
_lcd_ready(); // RS=0
_lcd_write_data(2); // cursor home
_lcd_ready();
_lcd_write_data(0xc); // cursor off
_lcd_ready();
_lcd_write_data(1); // clear
_lcd_x=_lcd_y=0;
}
void lcd_putchar(char c)
{
#asm
push r30
push r31
ld r26,y
set
cpir26,10
breq __lcd_putchar1
clt
#endasm
++_lcd_x;
if (_lcd_x>_lcd_maxx)
{
#asm("__lcd_putchar1:")
++_lcd_y;
lcd_gotoxy(0,_lcd_y);
#asm("brts __lcd_putchar0")
};
#asm
rcall __lcd_ready
sbi__lcd_port,__lcd_rs ;RS=1
ld r26,y
st -y,r26
rcall __lcd_write_data
__lcd_putchar0:
popr31
popr30
#endasm
}
// write the string str located in SRAM to the LCD
void lcd_puts(char *str)
{
char k;
while (k=*str++) lcd_putchar(k);
}
// write the string str located in FLASH to the LCD
void lcd_putsf(char flash *str)
{
char k;
while (k=*str++) lcd_putchar(k);
}
static void _long_delay(void)
{
#asm
clr r26
clr r27
__long_delay0:
sbiwr26,1 ;2 cycles
brne__long_delay0 ;2 cycles
#endasm
}
static void _lcd_init_write(unsigned char data)
{
#asm
cbi__lcd_port,__lcd_rd ;RD=0
in r26,__lcd_direction
ori r26,0xf7 ;set as output
out __lcd_direction,r26
in r27,__lcd_port
andir27,0xf
ld r26,y
#endasm
_lcd_write_nibble(); //RD=0, write MSN
#asm
sbi __lcd_port,__lcd_rd ;RD=1
#endasm
}
// initialize the LCD controller
unsigned char lcd_init(unsigned char lcd_columns)
{
#asm
cbi __lcd_port,__lcd_enable ;EN=0
cbi __lcd_port,__lcd_rs ;RS=0
#endasm
_lcd_maxx=lcd_columns;
_base_y=lcd_columns+0x80;
_base_y=lcd_columns+0xc0;
_long_delay();
_lcd_init_write(0x30);
_long_delay();
_lcd_init_write(0x30);
_long_delay();
_lcd_init_write(0x30);
_long_delay();
_lcd_init_write(0x20);
_long_delay();
_lcd_write_data(0x28);
_long_delay();
_lcd_write_data(4);
_long_delay();
_lcd_write_data(0x85);
_long_delay();
#asm
in r26,__lcd_direction
andir26,0xf ;set as input
out __lcd_direction,r26
sbi __lcd_port,__lcd_rd ;RD=1
#endasm
if (lcd_read_byte0()!=5) return 0;
_lcd_ready();
_lcd_write_data(6);
lcd_clear();
return 1;
} 确实是可以的,他的LIB文件就是源文件,并不是编译后的库文件,不过除了stdio.lib是以C为主外,大部分都是以汇编为主的~~
代码极尽优化~~~有空大家可以学习学习 LIB文件很有用处,建议大家学习使用,
可以把你做过的模块保存为一个LIB文件格式,
再建一个头文件来引用,以后想用这个模块的话就直接INCLUDE这个头文件
就行了,详细看AVR帮助里面的create libary
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