TLC6983底层驱动代码

TLC6983是一款高精度、多功能的LED驱动芯片，常用于LED显示屏、汽车LED灯等场合。以下是TLC6983的底层驱动代码示例：

#include <stdio.h>
#include <wiringPi.h>
#include <wiringPiSPI.h>

#define SPI_CHANNEL 0
#define SPI_SPEED   500000

#define TLC6983_CMD 0x00
#define TLC6983_DATA 0x01

void tlc6983_send_cmd(uint8_t cmd)
{
    uint8_t buf[2];
    buf[0] = TLC6983_CMD;
    buf[1] = cmd;
    wiringPiSPIDataRW(SPI_CHANNEL, buf, 2);
}

void tlc6983_send_data(uint16_t data)
{
    uint8_t buf[3];
    buf[0] = TLC6983_DATA;
    buf[1] = (data >> 8) & 0xff;
    buf[2] = data & 0xff;
    wiringPiSPIDataRW(SPI_CHANNEL, buf, 3);
}

void tlc6983_init(void)
{
    wiringPiSPISetup(SPI_CHANNEL, SPI_SPEED);
    tlc6983_send_cmd(0x81); // Set brightness to max
}

void tlc6983_set_led(uint8_t led, uint16_t brightness)
{
    tlc6983_send_cmd(0x10 + led);
    tlc6983_send_data(brightness);
}

int main(void)
{
    wiringPiSetup();
    tlc6983_init();
    tlc6983_set_led(0, 0x3ff); // Set LED0 to max brightness
    return 0;
}

以上代码使用了wiringPi库和wiringPiSPI库来控制SPI总线通讯，通过tlc6983_send_cmd和tlc6983_send_data函数发送命令和数据到TLC6983芯片，实现LED灯的控制。需要注意的是，TLC6983的控制方式比较复杂，需要根据实际情况进行调整。