STM32 TLC6983底层驱动代码

TLC6983是一款常用的LED驱动芯片，常用于LED显示屏幕的控制。下面给出一个基于STM32的TLC6983底层驱动代码示例：

#include "stm32f10x.h"

#define TLC6983_PORT GPIOB
#define TLC6983_LE_PIN GPIO_Pin_12
#define TLC6983_CLK_PIN GPIO_Pin_13
#define TLC6983_SIN_PIN GPIO_Pin_14

void TLC6983_Init() {
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  GPIO_InitStructure.GPIO_Pin = TLC6983_LE_PIN | TLC6983_CLK_PIN | TLC6983_SIN_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(TLC6983_PORT, &GPIO_InitStructure);

  TLC6983_PORT->BSRR = TLC6983_LE_PIN;
}

void TLC6983_Write(uint16_t data) {
  TLC6983_PORT->BRR = TLC6983_LE_PIN;

  for (uint8_t i = 0; i < 16; i++) {
    if (data & 0x8000) {
      TLC6983_PORT->BSRR = TLC6983_SIN_PIN;
    } else {
      TLC6983_PORT->BRR = TLC6983_SIN_PIN;
    }

    data <<= 1;

    TLC6983_PORT->BRR = TLC6983_CLK_PIN;
    TLC6983_PORT->BSRR = TLC6983_CLK_PIN;
  }

  TLC6983_PORT->BSRR = TLC6983_LE_PIN;
}

这个代码示例假设TLC6983的LE、CLK、SIN引脚分别连接到了STM32的GPIOB12、GPIOB13、GPIOB14上。在初始化函数中，我们首先开启GPIOB时钟，并设置这些引脚为输出模式。在写入数据函数中，我们首先将LE引脚拉低，然后逐位写入数据，最后再将LE引脚拉高。