Tk A / Nucleo_Hello_Encoder

hi

Dependents:   hello_enc_test

Fork of Nucleo_Hello_Encoder by David Lowe

Encoder/EncoderMspInitF4.cpp@0:ee5cb967aa17, 2015-01-10 (annotated)

Committer:
gregeric
Date:
Sat Jan 10 20:06:07 2015 +0000
Revision:
0:ee5cb967aa17
Child:
1:cd7b42c99ff8
Hello World example using the STM32's timer hardware interface, no interrupts.; ; Supporting Nucleo F030, F401, F411 (others can be added - L0xx included but untested).; ; Encoder with TIM4 not working on F411, OK on F401?

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gregeric 0:ee5cb967aa17 1 #include "mbed.h"
gregeric 0:ee5cb967aa17 2 /*
gregeric 0:ee5cb967aa17 3 * HAL_TIM_Encoder_MspInit()
gregeric 0:ee5cb967aa17 4 * Overrides the __weak function stub in stm32f4xx_hal_tim.h
gregeric 0:ee5cb967aa17 5 *
gregeric 0:ee5cb967aa17 6 * Edit the below for your preferred pin wiring & pullup/down
gregeric 0:ee5cb967aa17 7 * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs.
gregeric 0:ee5cb967aa17 8 * Encoder A&B outputs connected directly to GPIOs.
gregeric 0:ee5cb967aa17 9 *
gregeric 0:ee5cb967aa17 10 */
gregeric 0:ee5cb967aa17 11
gregeric 0:ee5cb967aa17 12 #ifdef TARGET_STM32F4
gregeric 0:ee5cb967aa17 13 void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim)
gregeric 0:ee5cb967aa17 14 {
gregeric 0:ee5cb967aa17 15 GPIO_InitTypeDef GPIO_InitStruct;
gregeric 0:ee5cb967aa17 16
gregeric 0:ee5cb967aa17 17 if (htim->Instance == TIM1) { //PA8 PA9 = Nucleo D7 D8, poss PB0 PB1 usable too (complementary?)
gregeric 0:ee5cb967aa17 18 __TIM1_CLK_ENABLE();
gregeric 0:ee5cb967aa17 19 __GPIOA_CLK_ENABLE();
gregeric 0:ee5cb967aa17 20 GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;
gregeric 0:ee5cb967aa17 21 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
gregeric 0:ee5cb967aa17 22 GPIO_InitStruct.Pull = GPIO_PULLDOWN;
gregeric 0:ee5cb967aa17 23 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
gregeric 0:ee5cb967aa17 24 GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
gregeric 0:ee5cb967aa17 25 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
gregeric 0:ee5cb967aa17 26 }
gregeric 0:ee5cb967aa17 27 else if (htim->Instance == TIM2) { //PA0 PA1 = Nucleo A0 A1, PA5 PB3 = D13 D3 poss too
gregeric 0:ee5cb967aa17 28 __TIM2_CLK_ENABLE();
gregeric 0:ee5cb967aa17 29 __GPIOA_CLK_ENABLE();
gregeric 0:ee5cb967aa17 30 GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
gregeric 0:ee5cb967aa17 31 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
gregeric 0:ee5cb967aa17 32 GPIO_InitStruct.Pull = GPIO_PULLDOWN;
gregeric 0:ee5cb967aa17 33 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
gregeric 0:ee5cb967aa17 34 GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
gregeric 0:ee5cb967aa17 35 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
gregeric 0:ee5cb967aa17 36 }
gregeric 0:ee5cb967aa17 37 else if (htim->Instance == TIM3) { //PB4 PB5 = Nucleo D5 D4, PA6 PA7 & PC6 PC7 also an option for Nucleo
gregeric 0:ee5cb967aa17 38 __TIM3_CLK_ENABLE();
gregeric 0:ee5cb967aa17 39 __GPIOB_CLK_ENABLE();
gregeric 0:ee5cb967aa17 40 GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5;
gregeric 0:ee5cb967aa17 41 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
gregeric 0:ee5cb967aa17 42 GPIO_InitStruct.Pull = GPIO_PULLDOWN;
gregeric 0:ee5cb967aa17 43 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
gregeric 0:ee5cb967aa17 44 GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
gregeric 0:ee5cb967aa17 45 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
gregeric 0:ee5cb967aa17 46 }
gregeric 0:ee5cb967aa17 47 else if (htim->Instance == TIM4) { // PB6 PB7 = Nucleo D10 MORPHO_PB7
gregeric 0:ee5cb967aa17 48 __TIM4_CLK_ENABLE();
gregeric 0:ee5cb967aa17 49 __GPIOB_CLK_ENABLE();
gregeric 0:ee5cb967aa17 50 GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_7;
gregeric 0:ee5cb967aa17 51 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
gregeric 0:ee5cb967aa17 52 GPIO_InitStruct.Pull = GPIO_PULLDOWN;
gregeric 0:ee5cb967aa17 53 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
gregeric 0:ee5cb967aa17 54 GPIO_InitStruct.Alternate = GPIO_AF2_TIM4;
gregeric 0:ee5cb967aa17 55 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
gregeric 0:ee5cb967aa17 56 }
gregeric 0:ee5cb967aa17 57 else if (htim->Instance == TIM5) { // here for completeness, mbed sytem timer uses this
gregeric 0:ee5cb967aa17 58 __TIM5_CLK_ENABLE();
gregeric 0:ee5cb967aa17 59 __GPIOA_CLK_ENABLE();
gregeric 0:ee5cb967aa17 60 GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
gregeric 0:ee5cb967aa17 61 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
gregeric 0:ee5cb967aa17 62 GPIO_InitStruct.Pull = GPIO_PULLDOWN;
gregeric 0:ee5cb967aa17 63 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
gregeric 0:ee5cb967aa17 64 GPIO_InitStruct.Alternate = GPIO_AF2_TIM5;
gregeric 0:ee5cb967aa17 65 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
gregeric 0:ee5cb967aa17 66 }
gregeric 0:ee5cb967aa17 67 }
gregeric 0:ee5cb967aa17 68 #endif