STM32 CAN波特率计算程序

原创已于 2022-07-22 10:19:20 修改 · 744 阅读

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#stm32 #arm #嵌入式硬件

于 2022-07-22 10:18:38 首次发布

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#include <stdio.h>
#define BS1_MIN 1
#define BS1_MAX 16

#define BS2_MIN 1
#define BS2_MAX 8


#define PRE_MIN 1
#define PRE_MAX 1024

typedef struct Band_ret{
    int BS1;
    int BS2;
    int PRE;
}Band_ret;

int main(){
    Band_ret band_ret[1000];
    unsigned int index;
    unsigned int bandRate;//kbit/s
    unsigned int APB1_FRE;//kHZ
    float BS1 = 0;
    float BS2 = 0;
    float prescaler = 0;
    int i,j,k;
    float tmp;
    float ret;

    printf("请输入目标波特率(kbit/s):\n");
    scanf("%d",&bandRate);
    printf("请输入APB1时钟(MHZ):\n");
    scanf("%d",&APB1_FRE);

    APB1_FRE*=1000;
    tmp = APB1_FRE/(bandRate*1.0);

    for(i=BS1_MIN;i<BS1_MAX;i++){
        for(j=BS2_MIN;j<BS2_MAX;j++){
            for(k=PRE_MIN;k<PRE_MAX;k++){
                ret = (1+i+j)*k;
                //printf("BS1: %d BS2: %d Prescaler: %d\n",i,j,k);
                if(tmp == ret){

                    if((1000-1) == index){
                            printf("溢出\n");
                        return;
                    }
                    band_ret[index].BS1 = i;
                    band_ret[index].BS2 = j;
                    band_ret[index].PRE = k;
                    index++;

                }


            }


        }


    }

    printf("==========================以下是符合要求的参数结果=======================\n");
    for(i=0;i<index;i++){
       printf(">>>BS1: %d BS2: %d Prescaler: %d\n",band_ret[i].BS1,band_ret[i].BS2,band_ret[i].PRE);

    }

    printf("=========================================================================\n");



    getchar();
    getchar();



    return 0;
}