Diff: Encoder/EncoderMspInitF0.cpp

Revision:

0:534dccd9b32a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Encoder/EncoderMspInitF0.cpp	Sun May 17 07:03:08 2020 +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
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