凌鸥MCPWM输出全0全1

只看该作者 · 2023-3-21 19:54

in main.c



    volatile int i;

    SYS_PROT = PSW_PROT;

    SYS_CLK_CFG = 0x01FF;





    SYS_SFT_RST = 0x00FF;

    SYS_SFT_RST = 0x0000;

    SYS_CLK_FEN = 0x0008;



    //mcpwm config

    MCPWM_PRT       = 0x0000DEAD; //enter password to unlock write protection

    MCPWM_TH        = 0x00000BCD;

    //-------



    //all 1

    MCPWM_TH00      = -0x00000BCD;

    MCPWM_TH01      = 0x00000BCD;

    MCPWM_DTH00     = 0;

    MCPWM_DTH01     = 0;

    MCPWM_SDCFG     = 0x1 << 4;   //t0 update

    MCPWM_FAIL     |= 0x00000040; //moe

    MCPWM_IO01     |= 0x00000000; //cmp mode

    //-------

    MCPWM_TCLK      = 0x0000000C; //ton, tclk_en, tclk_div[1:0], no div

    MCPWM_AUEN      = 0x3;        //enable auto update of th00 & th01

    //enable t1 event irq

    MCPWM_IE        = 0x2;

    MCPWM_UPDATE    = 0x0000FFFF; //write corresponding bit to trigger update

    //MCPWM_PRT     = 0x0000CAFE; //write any value other than 0xDEAD to enable write protection



    NVIC_EnableIRQ(MCPWM_IRQn); //enable the adc0 interrupt

    __enable_irq();            //clr PRIMASK

    SCB->SCR &= ~0x00000010;   //clr SEVONPEND

    GPIO1_POE       = 0x1 << 4 | 0x1 << 5;

    GPIO1_F7654     = 0x0033;

    i = 10;



    while(i--){

        while(0x1 != (0x1 & MCPWM_IF)); //wait for MCPWM_IF[0] -TH event

        MCPWM_IF |= 0x1;

    }

 PASS;

in interrupt.c

复制

void MCPWM_IRQHandler(void)

{

    MCPWM_IF |= 0xFF;

    GPIO0_PDO = ~GPIO0_PDO;

    if(GPIO0_PDO==0){

        if(MCPWM_TH00 != MCPWM_TH){

            GPIO1_PDO = ~GPIO1_PDO;

            MCPWM_TH00 = MCPWM_TH;

        }

        else{

            MCPWM_TH00 = -MCPWM_TH;

            GPIO2_PDO = ~GPIO2_PDO;

        }

    }

}