Gamepad & WSN

#include "Stdio.h"
#include "Conio.h"

int main(void)
{
    unsigned long a;
    unsigned char channel;
    printf("This is a demo to calculat CC2500's data.\r\n");
    printf("Input Frequency, Output Channel Number.\r\n");
    printf("Base=2.402GHz,Space=333.2519kHz,DataRate:249.939kHz\r\n");
    printf("So,Let's start!\r\n\r\n");
    while(1)
    {
        printf("Press 'q' to exit,Other key to continue\r\n\r\n");
        if(getch()!='q')
        {
             /* 此处添加代码 */
            printf("Input (RF_FREQ-2,400,000)(kHz)= ");
            scanf("%ld",&a);
            channel=(a-2000)/333;/*333@2.402*/
            printf("Channel= %u\r\n",channel);

        }
        else
        {
            for(channel=20;channel;--channel)
            {
                printf("%d ",channel);

            }
            getch();
            return 0;
        }
    }
}