tarou yamada / rotary_encoder

It is based on https://developer.mbed.org/users/gregeric/code/Nucleo_Hello_Encoder/

rotary_encoder_base/EncoderMspInitF4.cpp@5:fae9a340d212, 2016-04-09 (annotated)

Committer:
inst
Date:
Sat Apr 09 02:09:32 2016 +0000
Revision:
5:fae9a340d212
Parent:
2:4580c3869b7b 

        

        
Who changed what in which revision?

        

            
                
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#include "mbed.h"





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/*





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 * HAL_TIM_Encoder_MspInit()





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 * Overrides the __weak function stub in stm32f4xx_hal_tim.h





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 *





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 * Edit the below for your preferred pin wiring & pullup/down





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 * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs.





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 * Encoder A&B outputs connected directly to GPIOs.





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 *





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 * www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00102166.pdf





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 * www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00141306.pdf





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 *





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 * TIM1_CH1: AF1 @ PA_8, PE_9 





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 * TIM1_CH2: AF1 @ PA_9, PE_11 





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 *





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 * TIM2_CH1: AF1 @ PA_0, PA_5, PA_15, PB_8*     *F446 only





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 * TIM2_CH2: AF1 @ PA_1, PB_3, PB_9*            *F446 only





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 *





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 * TIM3_CH1: AF2 @ PA_6, PB_4, PC_6





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 * TIM3_CH2: AF2 @ PA_7, PB_5, PC_7





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 *





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 * TIM4_CH1: AF2 @ PB_6, PD_12





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 * TIM4_CH2: AF2 @ PB_7, PD_13





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 *





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 * TIM5_CH1: AF2 @ PA_0*    *TIM5 used by mbed system ticker so unavailable





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 * TIM5_CH2: AF2 @ PA_1*





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 *





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 */





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#ifdef TARGET_STM32F4





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void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim) {





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    GPIO_InitTypeDef GPIO_InitStruct;





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    if (htim->Instance == TIM1) { //PA8 PA9 = Nucleo D7 D8





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        __TIM1_CLK_ENABLE();





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        __GPIOA_CLK_ENABLE();





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        GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;





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        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;





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        GPIO_InitStruct.Pull = GPIO_PULLDOWN;





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        GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;





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        GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;





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        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);





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    } else if (htim->Instance == TIM2) { //PA0 PA1 = Nucleo A0 A1





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        __TIM2_CLK_ENABLE();





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        __GPIOA_CLK_ENABLE();





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        GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;





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        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;





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        GPIO_InitStruct.Pull = GPIO_PULLDOWN;





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        GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;





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        GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;





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        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);





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    } else if (htim->Instance == TIM3) { //PB4 PB5 = Nucleo D5 D4





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        __TIM3_CLK_ENABLE();





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        __GPIOB_CLK_ENABLE();





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        GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5;





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        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;





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        GPIO_InitStruct.Pull = GPIO_PULLDOWN;





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        GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;





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        GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;





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        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);





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    } else if (htim->Instance == TIM4) { // PB6 PB7 = Nucleo D10 MORPHO_PB7





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        __TIM4_CLK_ENABLE();





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        __GPIOB_CLK_ENABLE();





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        GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_7;





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        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;





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        GPIO_InitStruct.Pull = GPIO_PULLDOWN;





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        GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;





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        GPIO_InitStruct.Alternate = GPIO_AF2_TIM4;





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        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);





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    }





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}





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#endif