32bits encoder counter using 16bits TIM and a 32bits software counter
Dependents: Asserv_mot Asserv_mot
Fork of Encoder_Nucleo_32_bits by
Diff: EncoderMspInitF0.cpp
- Revision:
- 0:ebd170807e11
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EncoderMspInitF0.cpp Sun May 22 19:59:18 2016 +0000 @@ -0,0 +1,37 @@ +#include "mbed.h" +/* + * HAL_TIM_Encoder_MspInit() + * Overrides the __weak function stub in stm32f0xx_hal_tim.h + * + * Edit the below for your preferred pin wiring & pullup/down + * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs. + * Encoder A&B outputs connected directly to GPIOs. + * + * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00088500.pdf + * Table 11 has GPIO alternate function pinout mappings. + * + * TIM1_CH1: AF2 @ PA_8 - TIM1 used as system ticker under mbed, so unavailable + * TIM1_CH2: AF2 @ PA_9 + * + * TIM3_CH1: AF1 @ PA_6, PB_4; AF0 @ PC_6* *only for F030xC devices + * TIM3_CH2: AF1 @ PA_7, PB_5; AF0 @ PC_7* + * + */ + +#ifdef TARGET_STM32F0 +void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim) +{ + GPIO_InitTypeDef GPIO_InitStruct; + + if (htim->Instance == TIM3) { //PB_4 PB_5 = Nucleo D5 D4 + __TIM3_CLK_ENABLE(); + __GPIOB_CLK_ENABLE(); + GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5; + GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; + GPIO_InitStruct.Pull = GPIO_PULLDOWN; + GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; + GPIO_InitStruct.Alternate = GPIO_AF1_TIM3; + HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); + } +} +#endif \ No newline at end of file