Tuk ZeroFour / Encoder_Nucleo_16_bits

Brandon Modon Encoder_Nucleo_16_bits

EncoderMspInitF0.cpp@0:ebd170807e11, 2016-05-22 (annotated)

Committer:
kkoichy
Date:
Sun May 22 19:59:18 2016 +0000
Revision:
0:ebd170807e11
V1.0 :; - Objet Encoder_Nucleo_16_bits created, allowing 32bits encoder counting operation, based on a software 32bits counter, using a 16bits TIM with interrupt.; Based on the work of David Lowe

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kkoichy 0:ebd170807e11 1 #include "mbed.h"
kkoichy 0:ebd170807e11 2 /*
kkoichy 0:ebd170807e11 3 * HAL_TIM_Encoder_MspInit()
kkoichy 0:ebd170807e11 4 * Overrides the __weak function stub in stm32f0xx_hal_tim.h
kkoichy 0:ebd170807e11 5 *
kkoichy 0:ebd170807e11 6 * Edit the below for your preferred pin wiring & pullup/down
kkoichy 0:ebd170807e11 7 * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs.
kkoichy 0:ebd170807e11 8 * Encoder A&B outputs connected directly to GPIOs.
kkoichy 0:ebd170807e11 9 *
kkoichy 0:ebd170807e11 10 * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00088500.pdf
kkoichy 0:ebd170807e11 11 * Table 11 has GPIO alternate function pinout mappings.
kkoichy 0:ebd170807e11 12 *
kkoichy 0:ebd170807e11 13 * TIM1_CH1: AF2 @ PA_8 - TIM1 used as system ticker under mbed, so unavailable
kkoichy 0:ebd170807e11 14 * TIM1_CH2: AF2 @ PA_9
kkoichy 0:ebd170807e11 15 *
kkoichy 0:ebd170807e11 16 * TIM3_CH1: AF1 @ PA_6, PB_4; AF0 @ PC_6* *only for F030xC devices
kkoichy 0:ebd170807e11 17 * TIM3_CH2: AF1 @ PA_7, PB_5; AF0 @ PC_7*
kkoichy 0:ebd170807e11 18 *
kkoichy 0:ebd170807e11 19 */
kkoichy 0:ebd170807e11 20
kkoichy 0:ebd170807e11 21 #ifdef TARGET_STM32F0
kkoichy 0:ebd170807e11 22 void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim)
kkoichy 0:ebd170807e11 23 {
kkoichy 0:ebd170807e11 24 GPIO_InitTypeDef GPIO_InitStruct;
kkoichy 0:ebd170807e11 25
kkoichy 0:ebd170807e11 26 if (htim->Instance == TIM3) { //PB_4 PB_5 = Nucleo D5 D4
kkoichy 0:ebd170807e11 27 __TIM3_CLK_ENABLE();
kkoichy 0:ebd170807e11 28 __GPIOB_CLK_ENABLE();
kkoichy 0:ebd170807e11 29 GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5;
kkoichy 0:ebd170807e11 30 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
kkoichy 0:ebd170807e11 31 GPIO_InitStruct.Pull = GPIO_PULLDOWN;
kkoichy 0:ebd170807e11 32 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
kkoichy 0:ebd170807e11 33 GPIO_InitStruct.Alternate = GPIO_AF1_TIM3;
kkoichy 0:ebd170807e11 34 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
kkoichy 0:ebd170807e11 35 }
kkoichy 0:ebd170807e11 36 }
kkoichy 0:ebd170807e11 37 #endif