给出代码
时间: 2023-07-09 11:16:13 浏览: 39
以下是一个简单的基于S3C2410芯片的按键控制点阵点亮相对应数字的代码实现,可以供参考:
```
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#define GPFCON (*(volatile unsigned long*)0x56000050)
#define GPFDAT (*(volatile unsigned long*)0x56000054)
#define GPGCON (*(volatile unsigned long*)0x56000060)
#define GPGDAT (*(volatile unsigned long*)0x56000064)
void delay(int time) // 延时函数
{
volatile int i, j;
for (i = 0; i < time; i++)
for (j = 0; j < 1000; j++);
}
void led_on(int num) // 控制点阵显示数字
{
int i;
unsigned char num_array[10][8] = { // 数字的点阵模式数组
{0x3E, 0x41, 0x41, 0x41, 0x3E, 0x00, 0x00, 0x00}, // 0
{0x00, 0x21, 0x7F, 0x01, 0x00, 0x00, 0x00, 0x00}, // 1
{0x21, 0x43, 0x45, 0x49, 0x31, 0x00, 0x00, 0x00}, // 2
{0x22, 0x41, 0x49, 0x49, 0x36, 0x00, 0x00, 0x00}, // 3
{0x0F, 0x10, 0x20, 0x40, 0x7F, 0x00, 0x00, 0x00}, // 4
{0x72, 0x51, 0x51, 0x51, 0x4E, 0x00, 0x00, 0x00}, // 5
{0x3E, 0x49, 0x49, 0x49, 0x26, 0x00, 0x00, 0x00}, // 6
{0x01, 0x01, 0x01, 0x01, 0x7F, 0x00, 0x00, 0x00}, // 7
{0x36, 0x49, 0x49, 0x49, 0x36, 0x00, 0x00, 0x00}, // 8
{0x32, 0x49, 0x49, 0x49, 0x3E, 0x00, 0x00, 0x00} // 9
};
unsigned char *p = (unsigned char*)malloc(8);
for (i = 0; i < 8; i++)
p[i] = num_array[num][i];
for (i = 0; i < 8; i++) // 循环输出点阵模式
{
GPFDAT &= ~(0x1 << 5);
GPGDAT |= 0x1 << 4;
GPFDAT |= p[i] << 8;
delay(500);
GPFDAT &= ~(0xFF << 8);
GPGDAT &= ~(0x1 << 4);
GPFDAT |= 0x1 << 5;
delay(1);
}
free(p);
}
int main(void)
{
int fd;
unsigned long *gpio_f, *gpio_g;
int input_val;
int old_val = 1, new_val = 1;
int num = 0;
fd = open("/dev/mem", O_RDWR | O_SYNC);
gpio_f = (unsigned long*)mmap(0, 0x1000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0x56000050);
gpio_g = (unsigned long*)mmap(0, 0x1000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0x56000060);
GPFCON &= ~(0x3 << 10 | 0x3 << 12);
GPFCON |= 0x2 << 10 | 0x2 << 12;
GPGCON &= ~(0x3 << 8);
GPGCON |= 0x1 << 8;
GPFDAT |= 0x1 << 5;
GPGDAT &= ~(0x1 << 4);
while (1)
{
input_val = GPFDAT & (0x1 << 6);
new_val = (input_val == 0) ? 0 : 1;
if (new_val == 0 && old_val == 1) // 按键按下
{
num++;
if (num > 9) num = 0;
led_on(num);
}
old_val = new_val;
delay(10);
}
munmap(gpio_f, 0x1000);
munmap(gpio_g, 0x1000);
close(fd);
return 0;
}
```
这是一个简单的示例代码,可以实现按键控制点阵点亮相对应数字的功能,但实际的实现可能需要更加完善和细致的调试。