晨彦 发表于 2017-7-27 23:16
比如代码是这样的
假设你设置的是以TGRA作为一个周期，TGRB设置为initial output of MTIOC0C pin is 1. toggle output at compare  match.1 at output counter clear，那么你改变TGRB的值就可以改变占空比了，比如这里MTU0.TGRA = 9C40，十进制为40000，你改变MTU0.TGRB的值，将80E8（十进制为33000）改为2710（十进制为100 ...

比如，我新建了一个.c文件
代码如下
void PWM_INIT(int pwm1)
{

        PWM_CH1 =pwm1;


}
，
.h文件代码如下
#define PWM_CH1 MTU0.TGRB
void PWM_INIT(pwm1）

MTU3代码如下
/* Channel 0 is used as PWM2 mode */
    MTU0.TCR.BYTE = _00_MTU_PCLK_1 | _00_MTU_CKEG_RISE | _20_MTU_CKCL_A;
    MTU0.TCR2.BYTE = _00_MTU_PCLK_1;
    MTU.TSYRA.BIT.SYNC0 = 1U;
    MTU0.TMDR1.BYTE = _03_MTU_PWM2;
    MTU0.TIORH.BYTE = _70_MTU_IOB_HT | _00_MTU_IOA_DISABLE;
    MTU0.TIORL.BYTE = _70_MTU_IOD_HT | _07_MTU_IOC_HT;
    MTU0.TGRA = _9C3F_TGRA_VALUE;
   // MTU0.TGRB =_1F40_TGRB_VALUE;
    MTU0.TGRC = _3A98_TGRC_VALUE;
    MTU0.TGRD = _4E20_TGRD_VALUE;
    MTU0.TGRE = _9C40_TGRE_VALUE;
    MTU0.TGRF = _0064_TGRF_VALUE;
    MTU0.TIER2.BYTE = _00_MTU_TGIEE_DISABLE | _00_MTU_TGIEF_DISABLE;
    MTU0.TIER.BYTE = _00_MTU_TGIEA_DISABLE | _00_MTU_TGIEB_DISABLE | _00_MTU_TGIEC_DISABLE | _00_MTU_TGIED_DISABLE |
                     _00_MTU_TCIEU_DISABLE | _00_MTU_TCIEV_DISABLE | _00_MTU_TTGE_DISABLE;


main函数如下
void main(void)
{
    R_MAIN_UserInit();
    /* Start user code. Do not edit comment generated here */
    PWM_INIT (15000);
    R_MTU3_C0_Start();
    R_MTU3_C1_Start();
    R_MTU3_C2_Start();
    while (1U)
    {
        ;
    }
    /* End user code. Do not edit comment generated here */
}


不知何处问题，导致无法修改占空比值