本帖最后由 zjh20070904 于 2022-6-18 10:19 编辑
1 概述高级定时器有个死区控制功能，依据手册配置想要的死区时间时比较麻烦，于是依据手册自己总结了配置死区时间的计算方法。
2 计配置DTS寄存器的计算方法2.1 关键寄存器描述
2.2 计算方法（1）依据死区时间确定范围 对于CLKDIV配置为00、TMR1的时钟分别为8M、72MHz时，对应的死区配置范围是：
其中TDTS=CKD/TMR1_CLK
（2）依据死区时间范围代入对应的公式计算要配置的寄存器数值
3 应用案例代码中的时钟关系如下 （1）系统时钟为72MHz； （2）APB2的时钟未分频即72MHz； （3）TMR1挂接在APB2总线上，且时钟分频系数CLKDIV为00，因此TMR1的时钟为72MHz （4）CLKDIV默认配置为：00
3.1 TMR1_BDT_ConfigStruc.deadTime=36
3.2 TMR1_BDT_ConfigStruc.deadTime=(72+128-64)
3.3 TMR1_BDT_ConfigStruc.deadTime=(36+192-32)
3.4 TMR1_BDT_ConfigStruc.deadTime=(36+224-32)
3.5 CLKDIV对死区的影响
4 应用案例代码- int main(void)
- {
- GPIO_Config_T GPIO_ConfigStruct;
- TMR_BaseConfig_T TMR_TimeBaseStruct;
- TMR_OCConfig_T OCcongigStruct;
- TMR_BDTConfig_T TMR1_BDT_ConfigStruc;
-
- RCM_EnableAPB2PeriphClock((RCM_APB2_PERIPH_T)(RCM_APB2_PERIPH_GPIOA | RCM_APB2_PERIPH_TMR1 | RCM_APB2_PERIPH_GPIOB));
- GPIO_ConfigStruct.pin = GPIO_PIN_13;
- GPIO_ConfigStruct.mode = GPIO_MODE_AF_PP;
- GPIO_ConfigStruct.speed = GPIO_SPEED_50MHz;
- GPIO_Config(GPIOB, &GPIO_ConfigStruct);
- GPIO_ConfigStruct.pin = GPIO_PIN_8;
- GPIO_Config(GPIOA, &GPIO_ConfigStruct);
- TMR_TimeBaseStruct.clockDivision = TMR_CLOCK_DIV_2;
- TMR_TimeBaseStruct.countMode = TMR_COUNTER_MODE_UP;
- TMR_TimeBaseStruct.division =72-1;
- TMR_TimeBaseStruct.period = 40-1;
- TMR_ConfigTimeBase(TMR1, &TMR_TimeBaseStruct);
-
- OCcongigStruct.idleState = TMR_OC_IDLE_STATE_RESET;
- OCcongigStruct.mode = TMR_OC_MODE_PWM1;
- OCcongigStruct.nIdleState = TMR_OC_NIDLE_STATE_RESET;
- OCcongigStruct.nPolarity = TMR_OC_NPOLARITY_HIGH;
- OCcongigStruct.outputNState = TMR_OC_NSTATE_ENABLE;
- OCcongigStruct.outputState = TMR_OC_STATE_ENABLE;
- OCcongigStruct.polarity = TMR_OC_POLARITY_HIGH;
- OCcongigStruct.pulse =16;
- TMR_ConfigOC1(TMR1, &OCcongigStruct);
-
-
-
- TMR1_BDT_ConfigStruc.RMOS=TMR_RMOS_STATE_DISABLE;
- TMR1_BDT_ConfigStruc.IMOS=TMR_IMOS_STATE_ENABLE;
- TMR1_BDT_ConfigStruc.lockLevel=TMR_LOCK_LEVEL_OFF;
- TMR1_BDT_ConfigStruc.deadTime=(36+192-32);
- TMR1_BDT_ConfigStruc.BRKState=TMR_BRK_STATE_DISABLE;
- TMR1_BDT_ConfigStruc.BRKPolarity=TMR_BRK_POLARITY_LOW;
- TMR1_BDT_ConfigStruc.automaticOutput=TMR_AUTOMATIC_OUTPUT_DISABLE;
- TMR_ConfigBDT(TMR1,&TMR1_BDT_ConfigStruc);
- TMR_ConfigOC1Preload(TMR1, TMR_OC_PRELOAD_ENABLE);
- TMR_EnableAutoReload(TMR1);
-
- TMR_Enable(TMR1);
- TMR_EnablePWMOutputs(TMR1);
-
- while(1)
- {
- }
- }
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