EncoderMspInitL4.cpp

00001 #include "mbed.h"
00002 /*
00003  * HAL_TIM_Encoder_MspInit()
00004  * Overrides the __weak function stub in stm32f4xx_hal_tim.h
00005  *
00006  * Edit the below for your preferred pin wiring & pullup/down
00007  * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs.
00008  * Encoder A&B outputs connected directly to GPIOs.
00009  *
00010  * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00108832.pdf
00011  * Table 15 has GPIOx AFx pinouts
00012  *
00013  * TIM1_CH1: AF1 @ PA8, PE9
00014  * TIM1_CH2: AF1 @ PA9, PE11
00015  *
00016  * TIM2_CH1: AF1 @ PA0, PA5, PA15
00017  * TIM2_CH2: AF1 @ PA1, PB3
00018  *
00019  */
00020  
00021 #ifdef TARGET_STM32L4
00022 void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim)
00023 {
00024     GPIO_InitTypeDef GPIO_InitStruct;
00025  
00026     if (htim->Instance == TIM1) {       //PA8 PA9 = Nucleo D9 D1
00027         __TIM1_CLK_ENABLE();
00028         __GPIOA_CLK_ENABLE();
00029         GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;
00030         GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
00031         GPIO_InitStruct.Pull = GPIO_PULLDOWN;
00032         GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
00033         GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
00034         HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
00035     }
00036     else if (htim->Instance == TIM2) {  //PA0 PA1 = Nucleo A0 A1
00037         __TIM2_CLK_ENABLE();
00038         __GPIOA_CLK_ENABLE();
00039         GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
00040         GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
00041         GPIO_InitStruct.Pull = GPIO_PULLDOWN;
00042         GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
00043         GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
00044         HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
00045     }
00046 }
00047 #endif