sk6812内存条渐变流水c代码
时间: 2024-06-21 10:03:22 浏览: 4
SK6812是一种数字可编程RGB LED,内存条渐变流水效果可以通过控制SK6812的颜色和亮度来实现。下面是一个简单的C代码示例,可以实现内存条渐变流水效果:
```
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#define BCM2708_PERI_BASE 0x3F000000
#define GPIO_BASE (BCM2708_PERI_BASE + 0x200000)
#define PAGE_SIZE (4*1024)
#define BLOCK_SIZE (4*1024)
int mem_fd;
void *gpio_map;
volatile unsigned *gpio;
void setup_io()
{
if ((mem_fd = open("/dev/mem", O_RDWR|O_SYNC) ) < 0) {
printf("can't open /dev/mem \n");
exit(-1);
}
gpio_map = mmap(
NULL, // Any adddress in our space will do
BLOCK_SIZE, // Map length
PROT_READ|PROT_WRITE, // Enable reading & writting to mapped memory
MAP_SHARED, // Shared with other processes
mem_fd, // File to map
GPIO_BASE // Offset to GPIO peripheral
);
close(mem_fd);
if (gpio_map == MAP_FAILED) {
printf("mmap error %d\n", (int)gpio_map);
exit(-1);
}
gpio = (volatile unsigned *)gpio_map;
}
int main(int argc, char **argv)
{
setup_io();
// Set all pins as outputs
*(gpio+1) = (*(gpio+1) & ~(0x1FF)) | 0x155;
// Turn on all LEDs
*(gpio+7) = 0x155;
while (1) {
// Fade in
for (int i = 0; i < 255; i++) {
for (int j = 0; j < 5; j++) {
*(gpio+7) = 0x155 * ((i << (3*j)) & 0xE00);
usleep(1000);
}
}
// Fade out
for (int i = 255; i >= 0; i--) {
for (int j = 0; j < 5; j++) {
*(gpio+7) = 0x155 * ((i << (3*j)) & 0xE00);
usleep(1000);
}
}
}
return 0;
}
```
注意:此代码仅供参考,具体实现方式还需要根据硬件平台和编译环境进行调整。如果你想了解更多关于SK6812的信息,建议参考官方文档或者咨询硬件厂商。
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