Diff: Encoder/EncoderMspInitF4.cpp

Revision:

5:e1783d6ee885

Parent:

0:ee5cb967aa17

--- a/Encoder/EncoderMspInitF4.cpp	Wed Sep 30 08:15:19 2015 +0000
+++ b/Encoder/EncoderMspInitF4.cpp	Fri Dec 04 10:06:23 2015 +0000
@@ -7,14 +7,32 @@
  * I have encoder common at 3V3, using GPIO_PULLDOWN on inputs.
  * Encoder A&B outputs connected directly to GPIOs.
  *
+ * www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00102166.pdf
+ * www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00141306.pdf
+ *
+ * TIM1_CH1: AF1 @ PA_8, PE_9 
+ * TIM1_CH2: AF1 @ PA_9, PE_11 
+ *
+ * TIM2_CH1: AF1 @ PA_0, PA_5, PA_15, PB_8*     *F446 only
+ * TIM2_CH2: AF1 @ PA_1, PB_3, PB_9*            *F446 only
+ *
+ * TIM3_CH1: AF2 @ PA_6, PB_4, PC_6
+ * TIM3_CH2: AF2 @ PA_7, PB_5, PC_7
+ *
+ * TIM4_CH1: AF2 @ PB_6, PD_12
+ * TIM4_CH2: AF2 @ PB_7, PD_13
+ *
+ * TIM5_CH1: AF2 @ PA_0*    *TIM5 used by mbed system ticker so unavailable
+ * TIM5_CH2: AF2 @ PA_1*
+ *
  */
-
+ 
 #ifdef TARGET_STM32F4
 void HAL_TIM_Encoder_MspInit(TIM_HandleTypeDef *htim)
 {
     GPIO_InitTypeDef GPIO_InitStruct;
-
-    if (htim->Instance == TIM1) { //PA8 PA9 = Nucleo D7 D8, poss PB0 PB1 usable too (complementary?)
+ 
+    if (htim->Instance == TIM1) { //PA8 PA9 = Nucleo D7 D8
         __TIM1_CLK_ENABLE();
         __GPIOA_CLK_ENABLE();
         GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;
@@ -24,7 +42,7 @@
         GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
         HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
     }
-    else if (htim->Instance == TIM2) { //PA0 PA1 = Nucleo A0 A1, PA5 PB3 = D13 D3 poss too
+    else if (htim->Instance == TIM2) { //PA0 PA1 = Nucleo A0 A1
         __TIM2_CLK_ENABLE();
         __GPIOA_CLK_ENABLE();
         GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
@@ -34,7 +52,7 @@
         GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
         HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
     }
-    else if (htim->Instance == TIM3) { //PB4 PB5 = Nucleo D5 D4, PA6 PA7 & PC6 PC7 also an option for Nucleo
+    else if (htim->Instance == TIM3) { //PB4 PB5 = Nucleo D5 D4
         __TIM3_CLK_ENABLE();
         __GPIOB_CLK_ENABLE();
         GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_5;
@@ -54,15 +72,5 @@
         GPIO_InitStruct.Alternate = GPIO_AF2_TIM4;
         HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
     }
-    else if (htim->Instance == TIM5) { // here for completeness, mbed sytem timer uses this
-        __TIM5_CLK_ENABLE();
-        __GPIOA_CLK_ENABLE();
-        GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
-        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-        GPIO_InitStruct.Pull = GPIO_PULLDOWN;
-        GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-        GPIO_InitStruct.Alternate = GPIO_AF2_TIM5;
-        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
-    }
 }
 #endif
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