Ferry Musters / Mbed 2 deprecated Odacon_RotaryEncoderReadout

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Dependencies:   mbed

Encoder/EncoderMspInitL1.cpp@0:e3161ef4ffd9, 2019-09-16 (annotated)

Committer:
Ferryy
Date:
Mon Sep 16 10:17:12 2019 +0000
Revision:
0:e3161ef4ffd9
Working version of rotary encoder readout software.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Ferryy 0:e3161ef4ffd9 1 #include "mbed.h"
Ferryy 0:e3161ef4ffd9 2 /*
Ferryy 0:e3161ef4ffd9 3 * HAL_TIM_Encoder_MspInit()
Ferryy 0:e3161ef4ffd9 4 * Overrides the __weak function stub in stm32l4xx_hal_tim.h
Ferryy 0:e3161ef4ffd9 5 *
Ferryy 0:e3161ef4ffd9 6 * Edit the below for your preferred pin wiring & pullup/down
Ferryy 0:e3161ef4ffd9 7 * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs.
Ferryy 0:e3161ef4ffd9 8 * Encoder A&B outputs connected directly to GPIOs.
Ferryy 0:e3161ef4ffd9 9 *
Ferryy 0:e3161ef4ffd9 10 * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00098321.pdf
Ferryy 0:e3161ef4ffd9 11 * Table 9 has GPIO alternate function pinout mappings.
Ferryy 0:e3161ef4ffd9 12 *
Ferryy 0:e3161ef4ffd9 13 * TIM2_CH1: AF1 @ PA_0, PA_5, PA_15, PE_9
Ferryy 0:e3161ef4ffd9 14 * TIM2_CH2: AF1 @ PA_1, PB_3, PE_10
Ferryy 0:e3161ef4ffd9 15 *
Ferryy 0:e3161ef4ffd9 16 * TIM3_CH1: AF2 @ PA_6, PB_4, PC_6, PE_3
Ferryy 0:e3161ef4ffd9 17 * TIM3_CH2: AF2 @ PA_7, PB_5, PC_7, PE_4
Ferryy 0:e3161ef4ffd9 18 *
Ferryy 0:e3161ef4ffd9 19 * TIM4_CH1: AF2 @ PB_6, PD_12
Ferryy 0:e3161ef4ffd9 20 * TIM4_CH2: AF2 @ PB_7, PD_13
Ferryy 0:e3161ef4ffd9 21 *
Ferryy 0:e3161ef4ffd9 22 * TIM5_CH1: AF2 @ PA_0* *TIM5 used by mbed system ticker so unavailable
Ferryy 0:e3161ef4ffd9 23 * TIM5_CH2: AF2 @ PA_1*
Ferryy 0:e3161ef4ffd9 24 *
Ferryy 0:e3161ef4ffd9 25 */
Ferryy 0:e3161ef4ffd9 26
Ferryy 0:e3161ef4ffd9 27 #ifdef TARGET_STM32L1
Ferryy 0:e3161ef4ffd9 28 void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim)
Ferryy 0:e3161ef4ffd9 29 {
Ferryy 0:e3161ef4ffd9 30 GPIO_InitTypeDef GPIO_InitStruct;
Ferryy 0:e3161ef4ffd9 31
Ferryy 0:e3161ef4ffd9 32 if (htim->Instance == TIM2) { //PA0 PA1 = Nucleo A0 A1
Ferryy 0:e3161ef4ffd9 33 __TIM2_CLK_ENABLE();
Ferryy 0:e3161ef4ffd9 34 __GPIOA_CLK_ENABLE();
Ferryy 0:e3161ef4ffd9 35 GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
Ferryy 0:e3161ef4ffd9 36 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
Ferryy 0:e3161ef4ffd9 37 GPIO_InitStruct.Pull = GPIO_NOPULL;
Ferryy 0:e3161ef4ffd9 38 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
Ferryy 0:e3161ef4ffd9 39 GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
Ferryy 0:e3161ef4ffd9 40 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
Ferryy 0:e3161ef4ffd9 41 }
Ferryy 0:e3161ef4ffd9 42 // else if (htim->Instance == TIM3) { //PB4 PB5 = Nucleo D5 D4
Ferryy 0:e3161ef4ffd9 43 // __TIM3_CLK_ENABLE();
Ferryy 0:e3161ef4ffd9 44 // __GPIOB_CLK_ENABLE();
Ferryy 0:e3161ef4ffd9 45 // GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5;
Ferryy 0:e3161ef4ffd9 46 // GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
Ferryy 0:e3161ef4ffd9 47 // GPIO_InitStruct.Pull = GPIO_PULLDOWN;
Ferryy 0:e3161ef4ffd9 48 // GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
Ferryy 0:e3161ef4ffd9 49 // GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
Ferryy 0:e3161ef4ffd9 50 // HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
Ferryy 0:e3161ef4ffd9 51 // }
Ferryy 0:e3161ef4ffd9 52 // else if (htim->Instance == TIM4) { // PB6 PB7 = Nucleo D10 MORPHO_PB7
Ferryy 0:e3161ef4ffd9 53 // __TIM4_CLK_ENABLE();
Ferryy 0:e3161ef4ffd9 54 // __GPIOB_CLK_ENABLE();
Ferryy 0:e3161ef4ffd9 55 // GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_7;
Ferryy 0:e3161ef4ffd9 56 // GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
Ferryy 0:e3161ef4ffd9 57 // GPIO_InitStruct.Pull = GPIO_PULLDOWN;
Ferryy 0:e3161ef4ffd9 58 // GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
Ferryy 0:e3161ef4ffd9 59 // GPIO_InitStruct.Alternate = GPIO_AF2_TIM4;
Ferryy 0:e3161ef4ffd9 60 // HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
Ferryy 0:e3161ef4ffd9 61 // }
Ferryy 0:e3161ef4ffd9 62 }
Ferryy 0:e3161ef4ffd9 63 #endif