32bits encoder counter using 16bits TIM and a 32bits software counter
Dependents: v1 v2 v2bis GestionPixy ... more
EncoderMspInitL4.cpp
00001 #include "mbed.h" 00002 /* 00003 * HAL_TIM_Encoder_MspInit() 00004 * Overrides the __weak function stub in stm32f4xx_hal_tim.h 00005 * 00006 * Edit the below for your preferred pin wiring & pullup/down 00007 * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs. 00008 * Encoder A&B outputs connected directly to GPIOs. 00009 * 00010 * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00108832.pdf 00011 * Table 15 has GPIOx AFx pinouts 00012 * 00013 * TIM1_CH1: AF1 @ PA8, PE9 00014 * TIM1_CH2: AF1 @ PA9, PE11 00015 * 00016 * TIM2_CH1: AF1 @ PA0, PA5, PA15 00017 * TIM2_CH2: AF1 @ PA1, PB3 00018 * 00019 * TIM3_CH1: AF2 @ PA6, PB4, PC6, PE3 00020 * TIM3_CH2: AF2 @ PA7, PB5, PC7, PE4 00021 * 00022 * TIM4_CH1: AF2 @ PB6, PD12 00023 * TIM4_CH2: AF2 @ PB7, PD13 00024 * 00025 * TIM5_CH1: AF2 @ PA0, PF6 00026 * TIM5_CH2: AF2 @ PA1, PF7 00027 * 00028 */ 00029 00030 #ifdef TARGET_STM32L4 00031 void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim) 00032 { 00033 GPIO_InitTypeDef GPIO_InitStruct; 00034 00035 if (htim->Instance == TIM1) { //PA8 PA9 = Nucleo D7 D8 00036 __TIM1_CLK_ENABLE(); 00037 __GPIOA_CLK_ENABLE(); 00038 GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9; 00039 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; 00040 GPIO_InitStruct.Pull = GPIO_PULLDOWN; 00041 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; 00042 GPIO_InitStruct.Alternate = GPIO_AF1_TIM1; 00043 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); 00044 } 00045 else if (htim->Instance == TIM2) { //PA0 PA1 = Nucleo A0 A1 00046 __TIM2_CLK_ENABLE(); 00047 __GPIOA_CLK_ENABLE(); 00048 GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1; 00049 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; 00050 GPIO_InitStruct.Pull = GPIO_PULLDOWN; 00051 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; 00052 GPIO_InitStruct.Alternate = GPIO_AF1_TIM2; 00053 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); 00054 } 00055 else if (htim->Instance == TIM3) { //PB4 PB5 = Nucleo D5 D4 00056 __TIM3_CLK_ENABLE(); 00057 __GPIOB_CLK_ENABLE(); 00058 GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5; 00059 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; 00060 GPIO_InitStruct.Pull = GPIO_PULLDOWN; 00061 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; 00062 GPIO_InitStruct.Alternate = GPIO_AF2_TIM3; 00063 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); 00064 } 00065 else if (htim->Instance == TIM4) { // PB6 PB7 = Nucleo D10 MORPHO_PB7 00066 __TIM4_CLK_ENABLE(); 00067 __GPIOB_CLK_ENABLE(); 00068 GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_7; 00069 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; 00070 GPIO_InitStruct.Pull = GPIO_PULLDOWN; 00071 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; 00072 GPIO_InitStruct.Alternate = GPIO_AF2_TIM4; 00073 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); 00074 } 00075 else if (htim->Instance == TIM5) { // here for completeness, mbed sytem timer uses this 00076 __TIM5_CLK_ENABLE(); 00077 __GPIOA_CLK_ENABLE(); 00078 GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1; 00079 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; 00080 GPIO_InitStruct.Pull = GPIO_PULLDOWN; 00081 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; 00082 GPIO_InitStruct.Alternate = GPIO_AF2_TIM5; 00083 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); 00084 } 00085 } 00086 #endif
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