HC32F460PETB的PH2的EMB_IN4

PH2做为功能EMB_IN4，查资料，对应的是Timer4_3

程序设计

主函数

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int32_t main(void)
{
    stc_emb_tmr4_init_t stcEmbInit;

    /* MCU Peripheral registers write unprotected */
    LL_PERIPH_WE(LL_PERIPH_SEL);

    /* Configure TMR4 PWM. */
    TMR4_PwmConfig();

    /* Enable EMB peripheral clock */
    EMB_FCG_ENABLE();

//    /* EMB: initialize EMB pin */
    GPIO_SetFunc(EMB_PORT, EMB_PIN, EMB_GPIO_FUNC);

    /* EMB: initialize */
    (void)EMB_TMR4_StructInit(&stcEmbInit);
    stcEmbInit.stcPort.stcPort1.u32PortState = EMB_PORT1_ENABLE;
    stcEmbInit.stcPort.stcPort1.u32PortLevel = EMB_PORT1_DETECT_LVL_HIGH;//EMB_PORT1_DETECT_LVL_LOW;
    (void)EMB_TMR4_Init(EMB_GROUP, &stcEmbInit);

    /* EMB: enable interrupt */
    EMB_IntCmd(EMB_GROUP, EMB_INT_PORT1, ENABLE);

    /* EMB: register IRQ handler && configure NVIC. */
    (void)INTC_ShareIrqCmd(EMB_INT_SRC, ENABLE);
    NVIC_ClearPendingIRQ(EMB_INT_IRQn);
    NVIC_SetPriority(EMB_INT_IRQn, DDL_IRQ_PRIO_DEFAULT);
    NVIC_EnableIRQ(EMB_INT_IRQn);

    /* MCU Peripheral registers write protected */
    LL_PERIPH_WP(LL_PERIPH_SEL);

    for (;;) {
    }
}

定时器配置

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static void TMR4_PwmConfig(void)
{
    stc_tmr4_init_t stcTmr4Init;
    stc_tmr4_oc_init_t stcTmr4OcInit;
    stc_tmr4_pwm_init_t stcTmr4PwmInit;
    un_tmr4_oc_ocmrh_t unTmr4OcOcmrh;
    un_tmr4_oc_ocmrl_t unTmr4OcOcmrl;

    /* Initialize PWM I/O */
    GPIO_SetFunc(TIM4_OXH_PORT, TIM4_OXH_PIN, TIM4_OXH_GPIO_FUNC);
    GPIO_SetFunc(TIM4_OXL_PORT, TIM4_OXL_PIN, TIM4_OXL_GPIO_FUNC);

    /* Enable TMR4 peripheral clock */
    TMR4_FCG_ENABLE();

    /************************* Configure TMR4 counter *************************/
    /* TMR4 counter: initialize */
    (void)TMR4_StructInit(&stcTmr4Init);
    stcTmr4Init.u16ClockDiv = TMR4_CLK_DIV1024;
    stcTmr4Init.u16PeriodValue = TMR4_CNT_PERIOD_VALUE(stcTmr4Init.u16ClockDiv);
    (void)TMR4_Init(TMR4_UNIT, &stcTmr4Init);

    /************************* Configure TMR4 output-compare ******************/
    /* TMR4 OC channel: initialize TMR4 structure */
    (void)TMR4_OC_StructInit(&stcTmr4OcInit);
    stcTmr4OcInit.u16CompareValue = (stcTmr4Init.u16PeriodValue / 2U);

    /* TMR4 OC channel: initialize channel */
    (void)TMR4_OC_Init(TMR4_UNIT, TMR4_OC_CH_UH, &stcTmr4OcInit);
    (void)TMR4_OC_Init(TMR4_UNIT, TMR4_OC_CH_UL, &stcTmr4OcInit);

    /* TMR4 OC high channel: compare mode OCMR[15:0] = 0x0FFF = b 0000 1111 1111 1111 */
    unTmr4OcOcmrh.OCMRx_f.OCFDCH = TMR4_OC_OCF_SET; /* bit[0]     1  */
    unTmr4OcOcmrh.OCMRx_f.OCFPKH = TMR4_OC_OCF_SET; /* bit[1]     1  */
    unTmr4OcOcmrh.OCMRx_f.OCFUCH = TMR4_OC_OCF_SET; /* bit[2]     1  */
    unTmr4OcOcmrh.OCMRx_f.OCFZRH = TMR4_OC_OCF_SET; /* bit[3]     1  */
    unTmr4OcOcmrh.OCMRx_f.OPDCH  = TMR4_OC_INVT;    /* Bit[5:4]   11 */
    unTmr4OcOcmrh.OCMRx_f.OPPKH  = TMR4_OC_INVT;    /* Bit[7:6]   11 */
    unTmr4OcOcmrh.OCMRx_f.OPUCH  = TMR4_OC_INVT;    /* Bit[9:8]   11 */
    unTmr4OcOcmrh.OCMRx_f.OPZRH  = TMR4_OC_INVT;    /* Bit[11:10] 11 */
    unTmr4OcOcmrh.OCMRx_f.OPNPKH = TMR4_OC_HOLD;    /* Bit[13:12] 00 */
    unTmr4OcOcmrh.OCMRx_f.OPNZRH = TMR4_OC_HOLD;    /* Bit[15:14] 00 */
    TMR4_OC_SetHighChCompareMode(TMR4_UNIT, TMR4_OC_CH_UH, unTmr4OcOcmrh);

    /* TMR4 OC low channel: compare mode OCMR[31:0] 0x0FF0 0FFF = b 0000 1111 1111 0000   0000 1111 1111 1111 */
    unTmr4OcOcmrl.OCMRx_f.OCFDCL  = TMR4_OC_OCF_SET; /* bit[0]     1  */
    unTmr4OcOcmrl.OCMRx_f.OCFPKL  = TMR4_OC_OCF_SET; /* bit[1]     1  */
    unTmr4OcOcmrl.OCMRx_f.OCFUCL  = TMR4_OC_OCF_SET; /* bit[2]     1  */
    unTmr4OcOcmrl.OCMRx_f.OCFZRL  = TMR4_OC_OCF_SET; /* bit[3]     1  */
    unTmr4OcOcmrl.OCMRx_f.OPDCL   = TMR4_OC_INVT;    /* bit[5:4]   11 */
    unTmr4OcOcmrl.OCMRx_f.OPPKL   = TMR4_OC_INVT;    /* bit[7:6]   11 */
    unTmr4OcOcmrl.OCMRx_f.OPUCL   = TMR4_OC_INVT;    /* bit[9:8]   11 */
    unTmr4OcOcmrl.OCMRx_f.OPZRL   = TMR4_OC_INVT;    /* bit[11:10] 11 */
    unTmr4OcOcmrl.OCMRx_f.OPNPKL  = TMR4_OC_HOLD;    /* bit[13:12] 00 */
    unTmr4OcOcmrl.OCMRx_f.OPNZRL  = TMR4_OC_HOLD;    /* bit[15:14] 00 */
    unTmr4OcOcmrl.OCMRx_f.EOPNDCL = TMR4_OC_HOLD;    /* bit[17:16] 00 */
    unTmr4OcOcmrl.OCMRx_f.EOPNUCL = TMR4_OC_HOLD;    /* bit[19:18] 00 */
    unTmr4OcOcmrl.OCMRx_f.EOPDCL  = TMR4_OC_INVT;    /* bit[21:20] 11 */
    unTmr4OcOcmrl.OCMRx_f.EOPPKL  = TMR4_OC_INVT;    /* bit[23:22] 11 */
    unTmr4OcOcmrl.OCMRx_f.EOPUCL  = TMR4_OC_INVT;    /* bit[25:24] 11 */
    unTmr4OcOcmrl.OCMRx_f.EOPZRL  = TMR4_OC_INVT;    /* bit[27:26] 11 */
    unTmr4OcOcmrl.OCMRx_f.EOPNPKL = TMR4_OC_HOLD;    /* bit[29:28] 00 */
    unTmr4OcOcmrl.OCMRx_f.EOPNZRL = TMR4_OC_HOLD;    /* bit[31:30] 00 */
    TMR4_OC_SetLowChCompareMode(TMR4_UNIT, TMR4_OC_CH_UL, unTmr4OcOcmrl);

    /* TMR4 OC: enable */
    TMR4_OC_Cmd(TMR4_UNIT, TMR4_OC_CH_UH, ENABLE);
    TMR4_OC_Cmd(TMR4_UNIT, TMR4_OC_CH_UL, ENABLE);

    /************************* Configure TMR4 PWM *****************************/
    /* TMR4 PWM: initialize */
    (void)TMR4_PWM_StructInit(&stcTmr4PwmInit);
    stcTmr4PwmInit.u16Polarity = TMR4_PWM_OXH_HOLD_OXL_INVT;
    (void)TMR4_PWM_Init(TMR4_UNIT, TMR4_PWM_CH_U, &stcTmr4PwmInit);

    /* TMR4 PWM: set PWM pin output when EMB event occur. */
    TMR4_PWM_SetAbnormalPinStatus(TMR4_UNIT, TMR4_PWM_PIN_OUH, TMR4_PWM_ABNORMAL_PIN_LOW);
    TMR4_PWM_SetAbnormalPinStatus(TMR4_UNIT, TMR4_PWM_PIN_OUL, TMR4_PWM_ABNORMAL_PIN_LOW);

    /* Start TMR4 count. */
    TMR4_Start(TMR4_UNIT);
}

宏定义：

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/* TMR4 PWM pin definition */
#define TIM4_OXH_PORT                   (GPIO_PORT_B)
#define TIM4_OXH_PIN                    (GPIO_PIN_09)
#define TIM4_OXH_GPIO_FUNC              (GPIO_FUNC_2)

#define TIM4_OXL_PORT                   (GPIO_PORT_B)
#define TIM4_OXL_PIN                    (GPIO_PIN_08)
#define TIM4_OXL_GPIO_FUNC              (GPIO_FUNC_2)

/* TMR4 unit definition */
#define TMR4_UNIT                       (CM_TMR4_3)
#define TMR4_FCG_ENABLE()               (FCG_Fcg2PeriphClockCmd(FCG2_PERIPH_TMR4_3, ENABLE))

/* TMR4 count period value(250ms) */
#define TMR4_CNT_PERIOD_VALUE(div)      ((uint16_t)(TMR4_ClockFreq() / (1UL << (uint32_t)(div)) / 4UL) - 1U)

/* EMB unit definition */
#define EMB_GROUP                       (CM_EMB3)
#define EMB_FCG_ENABLE()                (FCG_Fcg2PeriphClockCmd(FCG2_PERIPH_EMB, ENABLE))

/* EMB interrupt definition */
#define EMB_INT_IRQn                    (INT140_IRQn)
#define EMB_INT_SRC                     (INT_SRC_EMB_GR3)

/* EMB pin definition */
#define EMB_PORT                        (GPIO_PORT_H)    /* PH02: EMB_IN4 */
#define EMB_PIN                         (GPIO_PIN_02)
#define EMB_GPIO_FUNC                   (GPIO_FUNC_6)

中断：

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void EMB_GR3_IrqHandler(void)
{
    if (SET == EMB_GetStatus(EMB_GROUP, EMB_FLAG_PORT1)) {
        /* Clear the EMB port status. */
        EMB_ClearStatus(EMB_GROUP, EMB_FLAG_PORT1);
    }
}

测试结果：

PH2悬空时，PB8和PB9输出互补PWM

PH2为高时，PB8和PB9输出低电平

PH2为低时，PB8和PB9输出PWM，没有高频。