raspiezo / Nucleo_L432KC_Quadrature_Decoder_with_ADC_and_DAC

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/EncoderMspInitF4.cpp

Committer:
tonnyleonard
Date:
2017-06-22
Revision:
23:5cd74e296f59
Parent:
0:789510d98ade

File content as of revision 23:5cd74e296f59:

#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.
 *
 * www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00102166.pdf
 * www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00141306.pdf
 *
 *
 * TIM2_CH1: AF1 @ PA_0, PA_5, PA_15, PB_8*     *F446 only
 * TIM2_CH2: AF1 @ PA_1, PB_3, PB_9*            *F446 only
 *
 *
 */

#ifdef TARGET_STM32F4
void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim)
{
    GPIO_InitTypeDef GPIO_InitStruct;

    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