STM32 TLC6983寄存器操作代码

以下是使用STM32控制TLC6983 LED驱动器的寄存器操作代码示例：

#include "stm32f10x.h"

/* 定义TLC6983寄存器地址 */
#define TLC6983_CONTROL_REG_ADDR   0x00
#define TLC6983_PWM0_REG_ADDR      0x01
#define TLC6983_PWM1_REG_ADDR      0x02
#define TLC6983_PWM2_REG_ADDR      0x03

/* 定义TLC6983控制寄存器参数 */
#define TLC6983_CTRL_AUTO_INC      0x80
#define TLC6983_CTRL_PWM0_EN       0x40
#define TLC6983_CTRL_PWM1_EN       0x20
#define TLC6983_CTRL_PWM2_EN       0x10
#define TLC6983_CTRL_BRIGHTNESS(x) ((x) & 0x0F)

/* 初始化TLC6983 */
void TLC6983_Init(void)
{
    /* 配置SPI接口 */
    // ...

    /* 配置GPIO */
    // ...

    /* 配置TLC6983控制寄存器 */
    uint8_t ctrl_reg = TLC6983_CTRL_AUTO_INC | TLC6983_CTRL_PWM0_EN |
                       TLC6983_CTRL_PWM1_EN | TLC6983_CTRL_PWM2_EN |
                       TLC6983_CTRL_BRIGHTNESS(0x0F);
    TLC6983_WriteReg(TLC6983_CONTROL_REG_ADDR, ctrl_reg);

    /* 配置TLC6983 PWM寄存器 */
    TLC6983_WriteReg(TLC6983_PWM0_REG_ADDR, 0x00);
    TLC6983_WriteReg(TLC6983_PWM1_REG_ADDR, 0x00);
    TLC6983_WriteReg(TLC6983_PWM2_REG_ADDR, 0x00);
}

/* 向TLC6983写入寄存器值 */
void TLC6983_WriteReg(uint8_t reg_addr, uint8_t reg_val)
{
    /* 使能SPI片选信号 */
    // ...

    /* 发送写寄存器命令 */
    uint8_t cmd = reg_addr << 1;
    SPI_SendData(cmd);

    /* 发送寄存器值 */
    SPI_SendData(reg_val);

    /* 等待SPI传输完成 */
    while (SPI_GetFlagStatus(SPI_FLAG_BSY) == SET);

    /* 禁用SPI片选信号 */
    // ...
}

/* 设置TLC6983 PWM值 */
void TLC6983_SetPWM(uint8_t pwm0, uint8_t pwm1, uint8_t pwm2)
{
    /* 配置TLC6983 PWM寄存器 */
    TLC6983_WriteReg(TLC6983_PWM0_REG_ADDR, pwm0);
    TLC6983_WriteReg(TLC6983_PWM1_REG_ADDR, pwm1);
    TLC6983_WriteReg(TLC6983_PWM2_REG_ADDR, pwm2);

    /* 更新PWM值 */
    uint8_t ctrl_reg = TLC6983_ReadReg(TLC6983_CONTROL_REG_ADDR);
    TLC6983_WriteReg(TLC6983_CONTROL_REG_ADDR, ctrl_reg);
}

/* 读取TLC6983寄存器值 */
uint8_t TLC6983_ReadReg(uint8_t reg_addr)
{
    /* 使能SPI片选信号 */
    // ...

    /* 发送读寄存器命令 */
    uint8_t cmd = (reg_addr << 1) | 0x01;
    SPI_SendData(cmd);

    /* 接收寄存器值 */
    uint8_t reg_val = SPI_ReceiveData();

    /* 等待SPI传输完成 */
    while (SPI_GetFlagStatus(SPI_FLAG_BSY) == SET);

    /* 禁用SPI片选信号 */
    // ...

    return reg_val;
}

以上代码中，`TLC6983_Init()`函数用于初始化TLC6983驱动器，包括配置SPI接口、GPIO和控制寄存器等。`TLC6983_WriteReg()`和`TLC6983_ReadReg()`函数用于向TLC6983写入和读取寄存器值。`TLC6983_SetPWM()`函数用于设置TLC6983的PWM值，并更新控制寄存器以使PWM值生效。