A program to monitor some parameters for a motor
Dependencies: mbed-dev BufferSerial
Thanks to David Lowe for https://developer.mbed.org/users/gregeric/code/Nucleo_Hello_Encoder/ which I adapted for the use of TIM2 32bit timer as an encoder reader on the Nucleo L432KC board.
Encoder/EncoderMspInitL4.cpp
- Committer:
- tonnyleonard
- Date:
- 2017-03-11
- Revision:
- 2:958e9094b198
- Parent:
- 1:a611582bffa7
File content as of revision 2:958e9094b198:
#include "mbed.h" /* * HAL_TIM_Encoder_MspInit() * Overrides the __weak function stub in stm32f4xx_hal_tim.h * * Edit the below for your preferred pin wiring & pullup/down * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs. * Encoder A&B outputs connected directly to GPIOs. * * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00108832.pdf * Table 15 has GPIOx AFx pinouts * * TIM1_CH1: AF1 @ PA8, PE9 * TIM1_CH2: AF1 @ PA9, PE11 * * TIM2_CH1: AF1 @ PA0, PA5, PA15 * TIM2_CH2: AF1 @ PA1, PB3 * */ #ifdef TARGET_STM32L4 void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim) { GPIO_InitTypeDef GPIO_InitStruct; if (htim->Instance == TIM1) { //PA8 PA9 = Nucleo D9 D1 __TIM1_CLK_ENABLE(); __GPIOA_CLK_ENABLE(); GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLDOWN; GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; GPIO_InitStruct.Alternate = GPIO_AF1_TIM1; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); } else if (htim->Instance == TIM2) { //PA0 PA1 = Nucleo A0 A1 __TIM2_CLK_ENABLE(); __GPIOA_CLK_ENABLE(); GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLDOWN; GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; GPIO_InitStruct.Alternate = GPIO_AF1_TIM2; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); } } #endif