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30金钱
请教一下大家,关于STM32F103编码器的问题
- void TIM3_Mode_Config(void)
- {
- //u16 CCR1_Val = 2500;
- //u16 CCR2_Val = 1000;
- GPIO_InitTypeDef GPIO_InitStructure;
- TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
- TIM_ICInitTypeDef TIM_ICInitStructure;
- //TIM_OCInitTypeDef TIM_OCInitStructure;
-
- /*----------------------------------------------------------------*/
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
-
-
- GPIO_StructInit(&GPIO_InitStructure);
- /* Configure PA.06,07 as encoder input */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
- /*----------------------------------------------------------------*/
-
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //ê1Äü£Ô£é£í£3
- TIM_DeInit(TIM3);
- TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
-
- TIM_TimeBaseStructure.TIM_Period =0xffff; //
- TIM_TimeBaseStructure.TIM_Prescaler =0; //éèÖÃÔ¤·ÖÆμ£o
- TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1 ; //éèÖÃê±Öó·ÖÆμÏμêy£o2»·ÖÆμ
- TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //ÏòéϼÆêyÄ£ê½
- //TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1;
- /*3õê¼»ˉTIM2¶¨ê±Æ÷ */
- TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
-
- /*-----------------------------------------------------------------*/
- //±àÂëÅäÖà ±àÂëÄ£ê½
- TIM_EncoderInterfaceConfig(TIM3, TIM_EncoderMode_TI12,
- TIM_ICPolarity_Rising, TIM_ICPolarity_Rising); //TIM_ICPolarity_RisingéÏéyÑØ2¶»ñ
- TIM_ICStructInit(&TIM_ICInitStructure);
- TIM_ICInitStructure.TIM_ICFilter = 6; //±è½ÏÂË2¨Æ÷
- TIM_ICInit(TIM3, &TIM_ICInitStructure);
-
- TIM_ClearFlag(TIM3, TIM_FLAG_Update);
- TIM_ITConfig(TIM3, TIM_IT_Update, DISABLE); //ê1ÄüÖD¶Ï
- //Reset counter
- TIM3->CNT =0;
-
-
- TIM_Cmd(TIM3, ENABLE); //ê1Äü¶¨ê±Æ÷3
- }
- void TIM_Init(void)
- {
- TIM3_Mode_Config();
- }
复制代码- if((TIM3->CR1 & TIM_CounterMode_Down) != TIM_CounterMode_Down)
- {
- printf("1\r\n");
- }
- else{
- printf("0\r\n");
- }
复制代码 无论正向还是反向,都只输出1,这是为什么?识别不了方向
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最佳答案
查看完整内容[请看2#楼]
http://www.openedv.com/forum.php?mod=viewthread&tid=301406&extra=
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