TLC6983驱动程序

TLC6983是一种LED驱动器，可用于控制LED灯条或其他LED应用。以下是一个简单的TLC6983驱动程序示例，可以用于Arduino平台：

#include <SPI.h>

//定义TLC6983寄存器地址
#define REG_CONTROL 0x00
#define REG_AUTO_INCREMENT 0x80
#define REG_PWM0 0x01
#define REG_PWM1 0x02
#define REG_PWM2 0x03
#define REG_PWM3 0x04
#define REG_PWM4 0x05
#define REG_PWM5 0x06
#define REG_PWM6 0x07
#define REG_PWM7 0x08

//定义TLC6983控制寄存器位
#define CONTROL_EXTCLK 0x80
#define CONTROL_OUTNE 0x40
#define CONTROL_OUTPE 0x20
#define CONTROL_DSPRPT 0x10
#define CONTROL_BLANK 0x08
#define CONTROL_OUTTMG 0x04
#define CONTROL_FUNCT 0x02
#define CONTROL_NOSYNC 0x01

//定义TLC6983预分频器值
#define PRESCALER_1 0x00
#define PRESCALER_2 0x01
#define PRESCALER_4 0x02
#define PRESCALER_8 0x03
#define PRESCALER_16 0x04
#define PRESCALER_32 0x05
#define PRESCALER_64 0x06
#define PRESCALER_128 0x07

//定义TLC6983时钟分频比
#define CLK_DIV_1 0x00
#define CLK_DIV_2 0x01
#define CLK_DIV_3 0x02
#define CLK_DIV_4 0x03
#define CLK_DIV_5 0x04
#define CLK_DIV_6 0x05
#define CLK_DIV_7 0x06
#define CLK_DIV_8 0x07
#define CLK_DIV_9 0x08
#define CLK_DIV_10 0x09
#define CLK_DIV_11 0x0A
#define CLK_DIV_12 0x0B
#define CLK_DIV_13 0x0C
#define CLK_DIV_14 0x0D
#define CLK_DIV_15 0x0E
#define CLK_DIV_16 0x0F

//定义TLC6983引脚定义
#define TLC6983_CS 10
#define TLC6983_BLANK 9
#define TLC6983_XLAT 8

//定义TLC6983参数
#define TLC6983_NUM_CHANNELS 8
#define TLC6983_BRIGHTNESS 4095

//定义TLC6983控制寄存器值
byte control = CONTROL_OUTNE | CONTROL_DSPRPT | CONTROL_FUNCT;

//定义TLC6983 PWM寄存器值
int pwm_values[TLC6983_NUM_CHANNELS] = {0,0,0,0,0,0,0,0};

//定义TLC6983函数
void setup_tlc6983() {
  pinMode(TLC6983_CS, OUTPUT);
  pinMode(TLC6983_BLANK, OUTPUT);
  pinMode(TLC6983_XLAT, OUTPUT);
  SPI.begin();
  SPI.setBitOrder(MSBFIRST);
  SPI.setDataMode(SPI_MODE0);
  SPI.setClockDivider(SPI_CLOCK_DIV4);
  digitalWrite(TLC6983_CS, HIGH);
}

void set_tlc6983_pwm(int channel, int value) {
  if (value < 0) value = 0;
  if (value > TLC6983_BRIGHTNESS) value = TLC6983_BRIGHTNESS;
  pwm_values[channel] = value;
}

void update_tlc6983() {
  digitalWrite(TLC6983_CS, LOW);
  SPI.transfer(REG_CONTROL | REG_AUTO_INCREMENT);
  SPI.transfer(control);
  for (int i = TLC6983_NUM_CHANNELS-1; i >= 0; i--) {
    SPI.transfer(pwm_values[i] >> 8);
    SPI.transfer(pwm_values[i] & 0xFF);
  }
  digitalWrite(TLC6983_XLAT, HIGH);
  digitalWrite(TLC6983_XLAT, LOW);
  digitalWrite(TLC6983_CS, HIGH);
}

void blank_tlc6983() {
  digitalWrite(TLC6983_BLANK, HIGH);
}

void unblank_tlc6983() {
  digitalWrite(TLC6983_BLANK, LOW);
}

该程序使用SPI接口与TLC6983通信，并实现了设置PWM值和更新TLC6983的函数。在Arduino主程序中，可以使用以下代码初始化TLC6983并设置PWM值：

void setup() {
  setup_tlc6983();
  for (int i = 0; i < TLC6983_NUM_CHANNELS; i++) {
    set_tlc6983_pwm(i, TLC6983_BRIGHTNESS/2);
  }
  update_tlc6983();
}

void loop() {
  //将PWM值设置为随机值
  for (int i = 0; i < TLC6983_NUM_CHANNELS; i++) {
    set_tlc6983_pwm(i, random(TLC6983_BRIGHTNESS));
  }
  update_tlc6983();
  delay(1000);
}

在主程序中，可以调用set_tlc6983_pwm函数将PWM值设置为所需的值，然后使用update_tlc6983函数将更改发送到TLC6983。