前言

调试使用的评估板：https://item.taobao.com/item.htm?spm=a230r.1.14.17.432b1562F8z658&id=612002664117&ns=1&abbucket=14#detail

作者再调试AD5933过程中，需要输出100Hz~100KHz扫频信号；

外部时钟16MHz情况下设置起始频点100HZ，会导致程序卡一会，排查下来是I2C卡在了校准增益这个地方；

然而起始频点设置1KHz 就不会有问题；那么问题应该可以缩小范围，开始翻手册找关于起始频点的介绍；

再用户手册“UG-364”中有关于这个的介绍，

只需要将MCK降低就可以了；

于是我们开始基于cube MX进行配置；

CubeMX配置

开始函数

使用的时候需要调用一下开始函数；

HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_1);  //AD5933时钟

改变频率

如果想改变频率，调用接口

/*** @brief  Set the TIM Prescaler on runtime.* @param  __HANDLE__ TIM handle.* @param  __PRESC__ specifies the Prescaler new value.* @retval None*/
#define __HAL_TIM_SET_PRESCALER(__HANDLE__, __PRESC__)       ((__HANDLE__)->Instance->PSC = (__PRESC__))

/*** @brief  Set the TIM Autoreload Register value on runtime without calling another time any Init function.* @param  __HANDLE__ TIM handle.* @param  __AUTORELOAD__ specifies the Counter register new value.* @retval None*/
#define __HAL_TIM_SET_AUTORELOAD(__HANDLE__, __AUTORELOAD__) \do{                                                    \(__HANDLE__)->Instance->ARR = (__AUTORELOAD__);  \(__HANDLE__)->Init.Period = (__AUTORELOAD__);    \} while(0)

改占空比

如果想改占空比，调用接口


/*** @brief  Set the TIM Capture Compare Register value on runtime without calling another time ConfigChannel function.* @param  __HANDLE__ TIM handle.* @param  __CHANNEL__ TIM Channels to be configured.*          This parameter can be one of the following values:*            @arg TIM_CHANNEL_1: TIM Channel 1 selected*            @arg TIM_CHANNEL_2: TIM Channel 2 selected*            @arg TIM_CHANNEL_3: TIM Channel 3 selected*            @arg TIM_CHANNEL_4: TIM Channel 4 selected*            @arg TIM_CHANNEL_5: TIM Channel 5 selected*            @arg TIM_CHANNEL_6: TIM Channel 6 selected* @param  __COMPARE__ specifies the Capture Compare register new value.* @retval None*/
#define __HAL_TIM_SET_COMPARE(__HANDLE__, __CHANNEL__, __COMPARE__) \(((__CHANNEL__) == TIM_CHANNEL_1) ? ((__HANDLE__)->Instance->CCR1 = (__COMPARE__)) :\((__CHANNEL__) == TIM_CHANNEL_2) ? ((__HANDLE__)->Instance->CCR2 = (__COMPARE__)) :\((__CHANNEL__) == TIM_CHANNEL_3) ? ((__HANDLE__)->Instance->CCR3 = (__COMPARE__)) :\((__CHANNEL__) == TIM_CHANNEL_4) ? ((__HANDLE__)->Instance->CCR4 = (__COMPARE__)) :\((__CHANNEL__) == TIM_CHANNEL_5) ? ((__HANDLE__)->Instance->CCR5 = (__COMPARE__)) :\((__HANDLE__)->Instance->CCR6 = (__COMPARE__)))