我正在尝试为基本的骰子模拟器程序编写代码。当按下开关时,两个七段显示器将在 1-6 之间快速变化。释放按钮时,随机数将显示在两个七段显示屏上。
此代码将连接到 ISIS 中的 pic16F877,我使用 MPLAB 进行 C 编程。
我对这个编程东西真的很陌生,所以我很难理解它。
#include <pic.h>
const char patterns[]={0X3F, 0X06, 0X5B, 0x4F, 0X66, 0X6D, 0X7D}
char rand_num1=0;
char rand_num2=0;
void main(void)
{
TRISB=0x00;
TRISC=0x01;
TRISD=0x00;
for(;;)
{
if(RCO==0)
{
rand_num1=rand()%6+1;
rand_num2=rand()%6+1;
}
if (RC0==1)
{
const char patterns[];
}
}
}
最佳答案
让我澄清一下我上面的评论:
首先,您不需要调用rand()
。用户将按下按钮一段时间(精度为 10 或 20 纳秒,这对于微 Controller 来说是一个合理的时钟)。在给定精度的情况下,此间隔可能比调用 rand()
更加随机。因此,您可以有一个计数器(即最多 256)并从此计数器中获取两个随机数。在代码中,这将类似于:
int counter = 0;
int lo_chunk, hi_chunk;
if(RCO == 0) { // assuming that RCO == 0 means the button is pressed
counter = (counter + 1) % 256; // keep one byte out of the int
// we'll use that byte two get 2 4-bit
// chunks that we'll use as our randoms
lo_chunk = (counter & 0xF) % 6; // keep 4 LSBits and mod them by 6
hi_chunk = ((counter >> 4) & 0xF) % 6; // shift to get next 4 bits and mod them by 6
// Now this part is tricky.
// since you want to display the numbers in the 7seg display, I am assuming
// that you will need to write the respective patterns "somewhere"
// (either a memory address or output pins). You'll need to check the
// documentation of your board on this. I'll just outline them as
// "existing functions"
write_first_7segment(patterns[lo_chunk]);
write_second_7segment(patterns[hi_chunk]);
} else if(RCO == 1) { // assuming that this means "key released"
rand_num1 = lo_chunk;
rand_num2 = hi_chunk;
// probably you'll also need to display the numbers.
}
我希望我在上面的评论中写的内容现在更有意义。
请记住,由于不知道您董事会的确切详细信息,我无法 告诉你如何实际将模式写入 7 段显示器,但我 假设会有某种功能。
关于c - C 编程的骰子模拟器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14259751/