20.02_TIMER-1mS定时器

/**
 * @brief TIMER-1mS定时器
 * @details
 * 1. 初始化timer0，设置timer时钟为2分频（主频96M，分频后48M），周期为1ms
 * 2. 在timer中断里翻转P0.0
 * 3. 不配置timer分频的情况下，最大计数时间为0.682mS，大于该时间后需要设置时钟分频
 */
#include "lks32mc09x_gpio.h"
#include "lks32mc09x_sys.h"
#include "lks32mc09x_timer.h"
#include "lks32mc09x_user_manual.h"

void Timer0_IRQHandler(void);

int main(void)
{
    GPIO_Config(GPIO0, GPIO_PinSource_0, GPIO_Mode_OUT, GPIO_AF_GPIO);

    // 初始化TIMER0
    TIMER_TimerInitTypeDef TIMER_InitStruct;
    TIMER_StructInit(&TIMER_InitStruct);

    // 配置TIMER0为比较模式，输出PWM
    TIMER_InitStruct.EN = ENABLE;                      ///< 定时器使能，ENABLE使能，DISABLE失能，影响timer的cnt是否计数
    TIMER_InitStruct.CAP1_CLR_EN = 0;                  ///< 当发生CAP1捕获事件时，清零 Timer 计数器，高有效
    TIMER_InitStruct.CAP0_CLR_EN = 0;                  ///< 当发生CAP0捕获事件时，清零 Timer 计数器，高有效
    TIMER_InitStruct.ONE_TRIG = 0;                     ///< 单次发送模式，此位需要在Timer比较模式下使用，且对应定时器使能需设置为0
    TIMER_InitStruct.CENTER = 0;                       ///< 中心计数模式使能,0:Timer向上从0计数至TH，然后回0，或Timer向下从TH计数至0，然后回到TH，1:Timer向上从0计数至TH，然后向下计数至0
    TIMER_InitStruct.DIR = 0;                          ///< 0:0->TH 递增计数，1：TH->递减计数
    TIMER_InitStruct.ClockDiv = 1;                     ///< Timer计数器频率配置,0:1分频,1:2分频,2:4分频,3:8分频,4:16分频,5:32分频,6:64分频,7:128分频
    TIMER_InitStruct.ETON = 0;                         ///< Timer计数器计数外部启动使能,0: 自动运行,1:外部事件触发计数
    TIMER_InitStruct.GATE_EN = 0;                      ///< Timer暂停使能，0：不暂停 1:当外部信号为低时，Timer暂停计数，外部信号根据TIMER1_EVT.EVT_SRC 进行选择
    TIMER_InitStruct.RL_EN = 0;                        ///< Timer重装使能,0：禁用外部事件重装，1：使能外部事件重装
    TIMER_InitStruct.XCLK_EN = 0;                      ///< Timer时钟源,0: 芯片内部时钟,1:外部时钟
    TIMER_InitStruct.SRC1 = 0;                         ///< Timer 捕获模式通道1信号来源,0:Timer通道0输入信号,1:Timer通道1输入信号,2:CLU0输出信号,3:CLU1输出信号,4:CLU2输出信号,5:CLU3输出信号,6:比较器0输出信号,7:比较器1输出信号,8:比较器2输出信号,9:Timer通道0和1的异或信号
    TIMER_InitStruct.CH1Output = 0;                    ///< Timer 通道1在比较模式下的输出极性控制，当计数器 CNT

#define GPIO_AF_I2C 6
#define REG_RESET(reg,mask) reg &= ~(mask)
#define REG_SET(reg,mask) reg |= (mask)
#define REG_WRITE(reg,mask) reg = (mask)
#define SYS0 ((SYS_TypeDef *)(SYS_BASE))
#define SYS_CLK_CFG_CLK_DIV_MASK (uint32_t)(0xFF << SYS_CLK_CFG_CLK_DIV_POS)
#define SYS_CLK_CFG_CLK_DIV_POS 0
#define SYS_CLK_CFG_CLK_SEL_MASK (uint32_t)(0x3 << SYS_CLK_CFG_CLK_SEL_POS)
#define SYS_CLK_CFG_CLK_SEL_POS 8
#define SYS_MODULE_GPIO BIT11
#define SYS_MODULE_TIMER0 BIT4
#define SYS_MODULE_TIMER1 BIT5
#define SYS_MODULE_TIMER2 BIT6
#define TIMER0 ((TIMER_TypeDef *)TIMER0_BASE)
#define TIMER1 ((TIMER_TypeDef *)TIMER1_BASE)
#define TIMER2 ((TIMER_TypeDef *)TIMER2_BASE)
/**
 * @brief GPIO功能配置结构体句柄
 */
typedef struct GPIO_InitTypeDef {
    uint32_t GPIO_Pin;
    GPIO_Mode_TypeDef GPIO_Mode;
    GPIO_PuPd_TypeDef GPIO_PuPd;
    uint32_t GPIO_PODEna;
    uint32_t GPIO_PFLT;
};
/**
 * @brief GPIO模式选择枚举
 */
typedef enum GPIO_Mode_TypeDef {
    GPIO_Mode_IN = 0,
    GPIO_Mode_OUT = 1,
    GPIO_Mode_ANA = 2,
    GPIO_Mode_IO = 3,
}} {enum_name};
/**
 * @brief Timer初始化结构体
 */
typedef struct TIMER_TimerInitTypeDef {
    uint8_t EN;
    uint32_t CAP1_CLR_EN;
    uint32_t CAP0_CLR_EN;
    uint32_t ONE_TRIG;
    uint32_t CENTER;
    uint32_t DIR;
    uint32_t ClockDiv;
    uint32_t ETON;
    uint32_t GATE_EN;
    uint32_t RL_EN;
    uint32_t XCLK_EN;
    uint32_t SRC1;
    uint32_t CH1Output;
    uint32_t CH1_WorkMode;
    uint32_t CH1_FE_CAP_EN;
    uint32_t CH1_RE_CAP_EN;
    uint32_t SRC0;
    uint32_t CH0Output;
    uint32_t CH0_WorkMode;
    uint32_t CH0_FE_CAP_EN;
    uint32_t CH0_RE_CAP_EN;
    uint32_t TH;
    uint32_t CNT;
    uint32_t CHN0;
    uint32_t CHN1;
    uint32_t EVT;
    uint32_t FLT;
    uint32_t IE;
    uint32_t CMP0_TRIGGER_MODE;
    uint32_t CMP1_TRIGGER_MODE;
    uint32_t SHADOW;
    uint32_t CH1_DEFAULT;
    uint32_t CH0_DEFAULT;
    uint32_t HALT_PRT;
    uint32_t FAIL_SEL;
    uint32_t FAIL_POL;
    uint32_t FAIL_EN;
    uint32_t MOE;
};
/**
 * @brief  GPIO配置函数
 * @param  GPIOx: GPIO端口
 * @param  GPIO_PinSource: GPIO引脚
 * @param  mode: GPIO模式
 * @param  GPIO_AF_x: GPIO复用功能选择
 */
void GPIO_Config(GPIO_TypeDef *GPIOx, uint32_t GPIO_PinSource, GPIO_Mode_TypeDef mode, uint32_t GPIO_AF_x)
{
    GPIO_PinAFConfig(GPIOx, GPIO_PinSource, GPIO_AF_x);
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_StructInit(&GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin  = 1 << GPIO_PinSource;
    GPIO_InitStructure.GPIO_Mode = mode;
    if (GPIO_AF_x == GPIO_AF_I2C)
    {
        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    }
    else
    {
        __NOP();
    }
    GPIO_Init(GPIOx, &GPIO_InitStructure);
}
/**
 * @brief Timer初始化
 * @param TIMERx Timer实例指针
 * @param TIMER_InitStruct Timer初始化结构体指针
 */
void TIMER_Init(TIMER_TypeDef *TIMERx, TIMER_TimerInitTypeDef *TIMER_InitStruct)
{
    uint32_t th = TIMER_InitStruct->TH;
    TIMER_Enable(TIMERx);
    if (TIMERx != TIMER2) // 只有timer2是32位定时器
    {
        if (th > 0xffff)
        {
            th = 0xffff;
        }
        else
        {
            __NOP();
        }
    }
    else
    {
        __NOP();
    }
    // 配置Timer寄存器
    TIMERx->CFG2 = (TIMER_InitStruct->EN << 15) |
                   (TIMER_InitStruct->ONE_TRIG << 9) |
                   (TIMER_InitStruct->CENTER << 8) |
                   (TIMER_InitStruct->DIR << 6) |
                   (TIMER_InitStruct->ClockDiv << 4) |
                   (TIMER_InitStruct->ETON << 3) |
                   (TIMER_InitStruct->GATE_EN << 2) |
                   (TIMER_InitStruct->RL_EN << 1) |
                   TIMER_InitStruct->XCLK_EN;

    TIMERx->CFG0 = (TIMER_InitStruct->CMP0_TRIGGER_MODE << 9) |
                   (TIMER_InitStruct->CAP0_CLR_EN << 8) |
                   (TIMER_InitStruct->SRC0 << 4) |
                   (TIMER_InitStruct->CH0Output << 3) |
                   (TIMER_InitStruct->CH0_WorkMode << 2) |
                   (TIMER_InitStruct->CH0_FE_CAP_EN << 1) |
                   (TIMER_InitStruct->CH0_RE_CAP_EN << 0);

    TIMERx->CFG1 = (TIMER_InitStruct->CMP1_TRIGGER_MODE << 9) |
                   (TIMER_InitStruct->CAP1_CLR_EN << 8) |
                   (TIMER_InitStruct->SRC1 << 4) |
                   (TIMER_InitStruct->CH1Output << 3) |
                   (TIMER_InitStruct->CH1_WorkMode << 2) |
                   (TIMER_InitStruct->CH1_FE_CAP_EN << 1) |
                   (TIMER_InitStruct->CH1_RE_CAP_EN << 0);

    TIMERx->CHN0 = TIMER_InitStruct->CHN0;
    TIMERx->CHN1 = TIMER_InitStruct->CHN1;
    TIMERx->TH   = th;
    TIMERx->CNT  = TIMER_InitStruct->CNT;
    TIMERx->EVT  = TIMER_InitStruct->EVT;
    TIMERx->FLT  = TIMER_InitStruct->FLT;
    TIMERx->IE   = TIMER_InitStruct->IE;

    TIMERx->IO = (TIMER_InitStruct->HALT_PRT << 7) |
                 (TIMER_InitStruct->CH0_DEFAULT << 8) |
                 (TIMER_InitStruct->CH1_DEFAULT << 9) |
                 (TIMER_InitStruct->MOE << 6) |
                 (TIMER_InitStruct->FAIL_SEL << 2) |
                 (TIMER_InitStruct->FAIL_POL << 1) |
                 (TIMER_InitStruct->FAIL_EN << 0);

    // 影子寄存器配置
    TIMERx->CFG2 |= (TIMER_InitStruct->SHADOW << 10);
}
/**
 * @brief Timer结构体初始化
 * @param TIMER_InitStruct Timer初始化结构体指针
 */
void TIMER_StructInit(TIMER_TimerInitTypeDef *TIMER_InitStruct)
{
    for (int i = 0; i < sizeof(TIMER_TimerInitTypeDef) / sizeof(uint32_t); i++)
    {
        ((uint32_t *)TIMER_InitStruct)[i] = 0;
    }
}
/**
 * @brief 使能Timer
 * @param TIMERx Timer实例指针
 */
void TIMER_Enable(TIMER_TypeDef *TIMERx)
{
    if (TIMERx == TIMER0)
    {
        SYS_ModuleClockCmd(SYS_MODULE_TIMER0, ENABLE);
    }
    else if (TIMERx == TIMER1)
    {
        SYS_ModuleClockCmd(SYS_MODULE_TIMER1, ENABLE);
    }
    else if (TIMERx == TIMER2)
    {
        SYS_ModuleClockCmd(SYS_MODULE_TIMER2, ENABLE);
    }
    else
    {
        __NOP();
    }
}
/**
 * @brief 初始化GPIO
 * @param GPIOx GPIO模块指针
 * @param GPIO_InitStruct 指向包含初始化参数的GPIO_InitTypeDef结构体
 */
void GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_InitStruct)
{
    // 使能GPIO时钟
    SYS_ModuleClockCmd(SYS_MODULE_GPIO, ENABLE);

    // 配置引脚模式
    if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IN)
    {
        GPIOx->PIE |= GPIO_InitStruct->GPIO_Pin;  // 打开输入使能
        GPIOx->POE &= ~GPIO_InitStruct->GPIO_Pin; // 关闭输出使能
        GPIOx->PUE &= ~GPIO_InitStruct->GPIO_Pin; // 关闭上拉使能
    }
    else if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_OUT)
    {
        GPIOx->PIE &= ~GPIO_InitStruct->GPIO_Pin; // 关闭输入使能
        GPIOx->POE |= GPIO_InitStruct->GPIO_Pin;  // 使能输出
    }
    else if (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_IO)
    {
        GPIOx->PIE |= GPIO_InitStruct->GPIO_Pin; // 使能输入
        GPIOx->POE |= GPIO_InitStruct->GPIO_Pin; // 使能输出
    }
    else // GPIO_Mode_ANA
    {
        GPIOx->PIE &= ~GPIO_InitStruct->GPIO_Pin; // 关闭输入使能
        GPIOx->POE &= ~GPIO_InitStruct->GPIO_Pin; // 关闭输出使能
        GPIOx->PUE &= ~GPIO_InitStruct->GPIO_Pin; // 关闭上拉使能
    }

    if (GPIO_InitStruct->GPIO_PuPd == GPIO_PuPd_UP)
    {
        GPIOx->PUE |= GPIO_InitStruct->GPIO_Pin; // 使能上拉
    }
    else
    {
        GPIOx->PUE &= ~GPIO_InitStruct->GPIO_Pin; // 关闭上拉
    }
    // 配置开漏使能
    if (GPIO_InitStruct->GPIO_PODEna)
    {
        GPIOx->PODE |= GPIO_InitStruct->GPIO_Pin;
    }
    else
    {
        GPIOx->PODE &= ~GPIO_InitStruct->GPIO_Pin;
    }

    // 配置滤波使能
    if (GPIO_InitStruct->GPIO_PFLT)
    {
        GPIOx->PFLT |= GPIO_InitStruct->GPIO_Pin;
    }
    else
    {
        GPIOx->PFLT &= ~GPIO_InitStruct->GPIO_Pin;
    }
}
/**
 * @brief 初始化GPIO结构体为默认值
 * @param GPIO_InitStruct 指向要初始化的GPIO_InitTypeDef结构体
 */
void GPIO_StructInit(GPIO_InitTypeDef *GPIO_InitStruct)
{
    for (int i = 0; i < sizeof(GPIO_InitTypeDef); i++)
    {
        ((uint8_t *)GPIO_InitStruct)[i] = 0;
    }
}
/**
 * @brief 数字模块时钟使能
 * @param nModule 模块编号
 * @param state 使能或禁用状态
 */
void SYS_ModuleClockCmd(uint32_t nModule, uint8_t state)
{
    REG_WRITE(SYS0->PROTECT, 0x7a83);
    if (state)
    {
        REG_SET(SYS0->CLK_FEN, nModule);
    }
    else
    {
        REG_RESET(SYS0->CLK_FEN, nModule);
    }
    REG_WRITE(SYS0->PROTECT, 0);
}
/**
 * @brief 清除Timer中断标志
 * @param TIMERx Timer实例指针
 * @param tempFlag 要清除的中断标志
 */
void TIMER_ClearIRQFlag(TIMER_TypeDef *TIMERx, uint32_t tempFlag)
{
    TIMERx->IF = tempFlag;
}
/**
 * @brief 翻转指定的GPIO引脚位
 * @param GPIOx GPIO模块指针
 * @param GPIO_Pin 要翻转的引脚
 */
void GPIO_ToggleBits(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
{
    GPIOx->PDO = GPIOx->PDO ^ GPIO_Pin;
}
/**
 * @brief 获取当前MCU时钟
 * @return 当前MCU时钟频率
 */
uint32_t SYS_ReadMcuClk(void)
{
    uint32_t clk    = 96000000;
    uint32_t clkdiv = (SYS_CLK_CFG & SYS_CLK_CFG_CLK_DIV_MASK) >> SYS_CLK_CFG_CLK_DIV_POS;
    uint32_t clksel = (SYS_CLK_CFG & SYS_CLK_CFG_CLK_SEL_MASK) >> SYS_CLK_CFG_CLK_SEL_POS;
    switch (clksel) //  0: HRC 1: PLL 2: LRC
    {
        case 0: // HRC
            clk = 8000000;
            break;
        case 1: // PLL
            switch (clkdiv)
            {
                case 0xff: // 96M
                    clk = 96000000;
                    break;
                case 0x55: // 48M
                    clk = 48000000;
                    break;
                case 0x11: // 24M
                    clk = 24000000;
                    break;
                case 0x01: // 12M
                    clk = 12000000;
                    break;
                case 0x00: // 12M
                    clk = 12000000;
                    break;
                default: // 逐位计算
                    clk = 0;
                    for (int i = 0; i < 8; i++)
                    {
                        if (clkdiv & (1 << i))
                        {
                            clk += 12000000;
                        }
                        else
                        {
                            __NOP();
                        }
                    }
                    break;
            }
            break;
        case 2: // LRC
            clk = 32000;
            break;
        default:
            break;
    }
    return clk;
}
/**
 * @brief 配置GPIO引脚复用功能
 * @param GPIOx GPIO模块指针
 * @param GPIO_PinSource 引脚源
 * @param GPIO_AF 复用功能选择
 */
void GPIO_PinAFConfig(GPIO_TypeDef *GPIOx, uint32_t GPIO_PinSource, uint32_t GPIO_AF)
{
    uint8_t offset;
    uint8_t pins = GPIO_PinSource >> 2;
    offset       = ((GPIO_PinSource & 0x3) * 4);
    switch (pins)
    {
        case 0:
            GPIOx->F3210 = (GPIOx->F3210 & ~(0xf << offset)) | (GPIO_AF << offset);
            break;
        case 1:
            GPIOx->F7654 = (GPIOx->F7654 & ~(0xf << offset)) | (GPIO_AF << offset);
            break;
        case 2:
            GPIOx->FBA98 = (GPIOx->FBA98 & ~(0xf << offset)) | (GPIO_AF << offset);
            break;
        case 3:
            GPIOx->FFEDC = (GPIOx->FFEDC & ~(0xf << offset)) | (GPIO_AF << offset);
            break;
        default:
            break;
    }
}