STM32 Usart1不能同时与TIM1一起使用
[英]STM32 Usart1 doesn't work with TIM1 at the same time
问题描述
I came across a problem while programming my stm32f103rbt6. 
我在编写stm32f103rbt6时遇到问题。
I'm using TIM1 (PB14, PB15) to generate PWM signal (works great) and USART1 (PA9, PA10) for bluetooth communication. 我正在使用TIM1（PB14，PB15）生成PWM信号（效果很好），并使用USART1（PA9，PA10）进行蓝牙通信。 The thing is, that I can't make PWM and USART1 TX work at the same time. 事实是，我不能同时使PWM和USART1 TX工作。 Everything works perfect until I make this config: 一切正常，直到我进行以下配置：
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
USART1 TX stops working after that. 此后，USART1 TX停止工作。 I'll appreciate any help! 我将不胜感激！
1 个解决方案
解决方案1
2 2015-11-30 14:30:48
Never use ST's structures without complete initialization of its fields! 在未完全初始化其字段的情况下，切勿使用ST的结构！
In your case, there is enabled TIM1_CH2 output on PA9 pin, because you didn't specify TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable . 在您的情况下，由于未指定TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable ，因此在PA9引脚上启用了TIM1_CH2输出。
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