0

我在 AVR Studio V4 中有一个程序,代码如下:

#include <avr/pgmspace.h>

void nlcd_Putc(unsigned char c)
{
    unsigned char i;
    if (c>127) c=c-64;  

    for (i = 0; i < 5; i++ )
    {
        nlcd_SendByte(DATA_LCD_MODE,pgm_read_byte(&(nlcd_Font[c-32][i])));
    }

    nlcd_SendByte(DATA_LCD_MODE,0x00); 
}

因此,当我想在 MiKroC for AVR 中运行此代码时,我收到以下错误:

128 324 表达式 MyProject.c 中未声明的标识符“pgm_read_byte”

我应该将标头添加avr/pgmspace.h到 MiKroc For AVR,还是 Mikroc For AVR 中的等效标头avr/pgmspace.h

非常感谢。

4

1 回答 1

0

通过将此代码添加到标题中:

typedef signed char                                             int8;
        typedef unsigned char                                           uint8;
        typedef signed int                                              int16;
        typedef unsigned int                                            uint16;
        typedef signed long int                                         int32;
        typedef unsigned long int                                       uint32; 

        //-----------------------    
        #define PGM_P                                   char flash *
        #define PROGMEM                                 flash
        #define const                                                                       flash
        #define PSTR(x)                                 x

        #define EEMEM                                   eeprom

        #define pgm_read_byte(x)                        (*((uint8  flash *)(x)))
        #define pgm_read_word(x)                        (*((uint16 flash *)(x)))
        #define pgm_read_float(x)                                               (*((uint32 flash *)(x)))
        #define pgm_read_byte_near(x)                                       (*((uint8  flash *)(x)))
于 2015-12-24T10:03:22.533 回答