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/EncoderMspInitF0.cpp@23:5cd74e296f59, 2017-06-22 (annotated)

Committer:
tonnyleonard
Date:
Thu Jun 22 10:41:57 2017 +0000
Revision:
23:5cd74e296f59
Parent:
0:789510d98ade 
Correct adc2 calibration offset and the dac1 calibration factor and offset, remove some junk comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tonnyleonard 0:789510d98ade 1 #include "mbed.h"
tonnyleonard 0:789510d98ade 2 /*
tonnyleonard 0:789510d98ade 3 * HAL_TIM_Encoder_MspInit()
tonnyleonard 0:789510d98ade 4 * Overrides the __weak function stub in stm32f0xx_hal_tim.h
tonnyleonard 0:789510d98ade 5 *
tonnyleonard 0:789510d98ade 6 * Edit the below for your preferred pin wiring & pullup/down
tonnyleonard 0:789510d98ade 7 * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs.
tonnyleonard 0:789510d98ade 8 * Encoder A&B outputs connected directly to GPIOs.
tonnyleonard 0:789510d98ade 9 *
tonnyleonard 0:789510d98ade 10 * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00088500.pdf
tonnyleonard 0:789510d98ade 11 * Table 11 has GPIO alternate function pinout mappings.
tonnyleonard 0:789510d98ade 12 *
tonnyleonard 0:789510d98ade 13 * TIM1_CH1: AF2 @ PA_8 - TIM1 used as system ticker under mbed, so unavailable
tonnyleonard 0:789510d98ade 14 * TIM1_CH2: AF2 @ PA_9
tonnyleonard 0:789510d98ade 15 *
tonnyleonard 0:789510d98ade 16 * TIM3_CH1: AF1 @ PA_6, PB_4; AF0 @ PC_6* *only for F030xC devices
tonnyleonard 0:789510d98ade 17 * TIM3_CH2: AF1 @ PA_7, PB_5; AF0 @ PC_7*
tonnyleonard 0:789510d98ade 18 *
tonnyleonard 0:789510d98ade 19 */
tonnyleonard 0:789510d98ade 20
tonnyleonard 0:789510d98ade 21 #ifdef TARGET_STM32F0
tonnyleonard 0:789510d98ade 22 void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim)
tonnyleonard 0:789510d98ade 23 {
tonnyleonard 0:789510d98ade 24 GPIO_InitTypeDef GPIO_InitStruct;
tonnyleonard 0:789510d98ade 25
tonnyleonard 0:789510d98ade 26 if (htim->Instance == TIM3) { //PB_4 PB_5 = Nucleo D5 D4
tonnyleonard 0:789510d98ade 27 __TIM3_CLK_ENABLE();
tonnyleonard 0:789510d98ade 28 __GPIOB_CLK_ENABLE();
tonnyleonard 0:789510d98ade 29 GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5;
tonnyleonard 0:789510d98ade 30 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
tonnyleonard 0:789510d98ade 31 GPIO_InitStruct.Pull = GPIO_PULLDOWN;
tonnyleonard 0:789510d98ade 32 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
tonnyleonard 0:789510d98ade 33 GPIO_InitStruct.Alternate = GPIO_AF1_TIM3;
tonnyleonard 0:789510d98ade 34 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
tonnyleonard 0:789510d98ade 35 }
tonnyleonard 0:789510d98ade 36 }
tonnyleonard 0:789510d98ade 37 #endif