sdcc+platformio开发51单片机无法使用keil头文件

Question

sdcc+platformio开发51单片机

由于sdcc没有<INTRINS.H>，所以用中断实现流水灯的程序当中循环位移_crol_和_cror_只能内嵌汇编来写，但是不知道这样写为什么执行中断语句后，灯移了一位，下面就全亮了，没有做到循环移位的效果

没有实现流水灯，而是直接全亮

代码

主程序

#include <8052.h>
#include "Timer0.h"  // STC-ISP对新系列单片机配置
#include "Key.h"

unsigned char key_number, led_mode;

void Timer0_Rountine(void) __interrupt (1);

void main() {
    __asm
        MOV A, #0XFE
        MOV P2, A
        __endasm;
    Timer0Init();
    while (1) {
        key_number = Key();
        if (key_number) {
            // 控制led_mode只会按1, 0, 1, 0, … 变化
            if (key_number == 1) {
                led_mode++;
                if (led_mode >= 2) led_mode = 0;
            }
        }
    }
}

void Timer0_Rountine(void) __interrupt (1) {
    static unsigned int t0_count;
    TL0 = 0x18;        //设置定时初始值
    TH0 = 0xFC;       //设置定时初始值
    t0_count++;
    if (t0_count >= 500) {
        t0_count = 0;
        if (led_mode == 0) {
            __asm
                RL A
                MOV P2,A
            __endasm;
        }
        if (led_mode == 1) {
            __asm
                RR A
                MOV P2, A
            __endasm;
        }
    }
}

Timer0.c

#include <8052.h>

/*
 * @brief  定时器0初始化，1毫秒@12.000MHz
 * @param  无
 * @retval 无
 */

void Timer0Init(void)        //1毫秒@12MHz
{
    //AUXR &= 0x7F;        //定时器时钟12T模式，新系列有AUXR寄存器，本次不设置
    TMOD &= 0xF0;                //设置定时器模式
    TMOD |= 0x01;                //设置定时器模式
    TL0 = 0x18;                        //设置定时初始值
    TH0 = 0xFC;                //设置定时初始值
    TF0 = 0;        
    TR0 = 1;        
    ET0 = 1;
    EA = 1;
    PT0 = 0;
}

Key.c

#include <8052.h>
#include "Delay.h"

/*
 * @brief  获取独立按键键码
 * @param  无
 * @retval 按下按键的键码，范围0 ~ 4，无按键按下时返回值为0
 */
unsigned char Key() {
    unsigned char key_number = 0;
    if (P3_1 == 0) {
        Delay(20);
        while (P3_1 == 0) {}
        Delay(20);
        key_number = 1;
    }
    if (P3_0 == 0) {
        Delay(20); 
        while (P3_0 == 0) {}
        Delay(20);
        key_number = 2;
    }
    if (P3_2 == 0) {
        Delay(20);
        while (P3_2 == 0) {}
        Delay(20);
        key_number = 3;
    }
    if (P3_3 == 0) {
        Delay(20);
        while (P3_3 == 0) {}
        Delay(20);
        key_number = 4;
    }
    return key_number;
}

Delay.c

void Delay(unsigned int xms) {
    unsigned char i, j;
    while (xms--) {
        i = 2;
        j = 239;
        do {
            while (--j) {}
        } while (--i);
    }
}

运行结果就是sdcc编译通过没有报错但是LED灯全亮

Processing STC89C52RC (platform: intel_mcs51; board: STC89C52RC)
----------------------------------------------------------------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/intel_mcs51/STC89C52RC.html
PLATFORM: Intel MCS-51 (8051) (2.1.0) > Generic STC89C52RC
HARDWARE: STC89C52RC 11MHz, 512B RAM, 8KB Flash
PACKAGES:
 - toolchain-sdcc @ 1.40200.0 (4.2.0)
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 0 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Compiling .pio\build\STC89C52RC\src\main.rel
Compiling .pio\build\STC89C52RC\src\test.rel
Linking .pio\build\STC89C52RC\firmware.hex
Checking size .pio\build\STC89C52RC\firmware.hex
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
Flash: [          ]   4.3% (used 351 bytes from 8192 bytes)
======================================================== [SUCCESS] Took 0.80 seconds ========================================================
 *  Terminal will be reused by tasks, press any key to close it. 

如果用Keil可以用<INTRINS.H>的话还是可以做出来的，但是sdcc没有不进位的循环位移，而且要求用中断非数组的方法实现，就不懂怎么把这两个函数转换成汇编的形式可以在sdcc下实现一样的功能，主要是这一段：

    if (led_mode == 0) {
            __asm
                RL A
                MOV P2,A
            __endasm;
        }
        if (led_mode == 1) {
            __asm
                RR A
                MOV P2, A
            __endasm;
        }
    }

麻烦会sdcc工具开发单片机的指导看下问题出错在哪里，还有C51<INTRINS.H>当中sdcc没有的函数怎么用sdcc复现，目前自己只查到了pop, push, nop的，这种crol, cror的还不会，谢谢

Answer 1

你在KEIL里用crol cror写个函数，然后反汇编看看