mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

Diff: targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L011K4/PeripheralPins.c

Revision:
176:447f873cad2f
Parent:
169:e3b6fe271b81
Child:
181:57724642e740
--- a/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L011K4/PeripheralPins.c	Wed Oct 11 12:45:49 2017 +0100
+++ b/targets/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L011K4/PeripheralPins.c	Wed Oct 25 14:53:38 2017 +0100
@@ -1,6 +1,6 @@
 /* mbed Microcontroller Library
  *******************************************************************************
- * Copyright (c) 2016, STMicroelectronics
+ * Copyright (c) 2017, STMicroelectronics
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -30,118 +30,126 @@
 
 #include "PeripheralPins.h"
 
-// =====
-// Note: Commented lines are alternative possibilities which are not used per default.
-//       If you change them, you will have also to modify the corresponding xxx_api.c file
-//       for pwmout, analogin, analogout, ...
-// =====
+//==============================================================================
+// Notes
+//
+// - The pins mentionned Px_y_ALTz are alternative possibilities which use other
+//   HW peripheral instances. You can use them the same way as any other "normal"
+//   pin (i.e. PwmOut pwm(PA_7_ALT0);). These pins are not displayed on the board
+//   pinout image on mbed.org.
+//
+// - The pins which are connected to other components present on the board have
+//   the comment "Connected to xxx". The pin function may not work properly in this
+//   case. These pins may not be displayed on the board pinout image on mbed.org.
+//   Please read the board reference manual and schematic for more information.
+//
+//==============================================================================
 
 //*** ADC ***
 
 const PinMap PinMap_ADC[] = {
-    {PA_0,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 0, 0)}, // ADC_IN0
-    {PA_1,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // ADC_IN1
-    {PA_2,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // ADC_IN2
-    {PA_3,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 3, 0)}, // ADC_IN3
-    {PA_4,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 4, 0)}, // ADC_IN4
-    {PA_5,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 5, 0)}, // ADC_IN5
-    {PA_6,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 6, 0)}, // ADC_IN6
-    {PA_7,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC_IN7
-    {PB_0,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC_IN8
-    {PB_1,  ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC_IN9
-    {NC,   NC,    0}
+    {PA_0, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 0, 0)}, // ADC_IN0
+    {PA_1, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 1, 0)}, // ADC_IN1
+//  {PA_2, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 2, 0)}, // ADC_IN2 - Connected to STDIO_UART_TX
+    {PA_3, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 3, 0)}, // ADC_IN3
+    {PA_4, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 4, 0)}, // ADC_IN4
+    {PA_5, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 5, 0)}, // ADC_IN5
+    {PA_6, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 6, 0)}, // ADC_IN6
+    {PA_7, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 7, 0)}, // ADC_IN7
+    {PB_0, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 8, 0)}, // ADC_IN8
+    {PB_1, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 9, 0)}, // ADC_IN9
+    {NC, NC, 0}
 };
 
 const PinMap PinMap_ADC_Internal[] = {
     {ADC_TEMP, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 18, 0)}, // See in analogin_api.c the correct ADC channel used
     {ADC_VREF, ADC_1, STM_PIN_DATA_EXT(STM_MODE_ANALOG, GPIO_NOPULL, 0, 17, 0)}, // See in analogin_api.c the correct ADC channel used
-    {NC,   NC,    0}
+    {NC, NC, 0}
 };
 
 //*** DAC ***
 
 const PinMap PinMap_DAC[] = {
-    {NC,   NC,    0}
+    {NC, NC, 0}
 };
 
-
 //*** I2C ***
 
 const PinMap PinMap_I2C_SDA[] = {
     {PA_10, I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
     {PA_13, I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF3_I2C1)},
     {PB_7,  I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
-    {NC,    NC,    0}
+    {NC, NC, 0}
 };
 
 const PinMap PinMap_I2C_SCL[] = {
-    {PA_4,  I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF3_I2C1)},
-    {PA_9,  I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
-    {PB_6,  I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
-    {NC,    NC,    0}
+    {PA_4, I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF3_I2C1)},
+    {PA_9, I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+    {PB_6, I2C_1, STM_PIN_DATA(STM_MODE_AF_OD, GPIO_NOPULL, GPIO_AF1_I2C1)},
+    {NC, NC, 0}
 };
 
 //*** PWM ***
 
-// TIM21 cannot be used because already used by the us_ticker
+// TIM21 (PWM_21) cannot be used because already used by the us_ticker
 const PinMap PinMap_PWM[] = {
-    {PA_0,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  1, 0)},  // TIM2_CH1
-    {PA_1,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  2, 0)},  // TIM2_CH2
-//  {PA_2,  PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21, 1, 0)},  // TIM21_CH1
-//  {PA_2,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  3, 0)},  // TIM2_CH3 - used by STDIO TX
-//  {PA_3,  PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21, 2, 0)},  // TIM21_CH2
-    {PA_3,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  4, 0)},  // TIM2_CH4
-    {PA_5,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  1, 0)},  // TIM2_CH1
-    {PA_8,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  1, 0)},  // TIM2_CH1
-//  {PA_9,  PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM21, 2, 0)},  // TIM21_CH2
-//  {PA_10, PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21, 1, 0)},  // TIM21_CH1
-    {PA_10, PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  3, 0)},  // TIM2_CH3
-//  {PA_11, PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM21, 2, 0)},  // TIM21_CH2
-//  {PA_15, PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  1, 0)},  // TIM2_CH1 - used by STDIO RX
-//  {PB_0,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  2, 0)},  // TIM2_CH2
-    {PB_0,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  3, 0)},  // TIM2_CH3
-    {PB_1,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  4, 0)},  // TIM2_CH4
-    {PB_3,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  2, 0)},  // TIM2_CH2
-//  {PB_5,  PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM21, 1, 0)},  // TIM21_CH1
-    {PB_6,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  3, 0)},  // TIM2_CH3
-    {PB_7,  PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  4, 0)},  // TIM2_CH4
-    {NC,    NC,    0}
+    {PA_0,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  1, 0)}, // TIM2_CH1
+    {PA_1,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  2, 0)}, // TIM2_CH2
+//  {PA_2,      PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21, 1, 0)}, // TIM21_CH1 - Connected to STDIO_UART_TX
+//  {PA_2,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  3, 0)}, // TIM2_CH3 - Connected to STDIO_UART_TX
+//  {PA_3,      PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21, 2, 0)}, // TIM21_CH2
+    {PA_3,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  4, 0)}, // TIM2_CH4
+    {PA_5,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  1, 0)}, // TIM2_CH1
+    {PA_8,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  1, 0)}, // TIM2_CH1
+//  {PA_9,      PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM21, 2, 0)}, // TIM21_CH2
+//  {PA_10,     PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21, 1, 0)}, // TIM21_CH1
+    {PA_10,     PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  3, 0)}, // TIM2_CH3
+//  {PA_11,     PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM21, 2, 0)}, // TIM21_CH2
+//  {PA_15,     PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  1, 0)}, // TIM2_CH1 - Connected to STDIO_UART_RX
+    {PB_0,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  3, 0)}, // TIM2_CH3
+    {PB_0_ALT0, PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  2, 0)}, // TIM2_CH2
+    {PB_1,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  4, 0)}, // TIM2_CH4
+    {PB_3,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2,  2, 0)}, // TIM2_CH2 - Connected to LED
+//  {PB_5,      PWM_21, STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM21, 1, 0)}, // TIM21_CH1
+    {PB_6,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  3, 0)}, // TIM2_CH3
+    {PB_7,      PWM_2,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2,  4, 0)}, // TIM2_CH4
+    {NC, NC, 0}
 };
 
 //*** SERIAL ***
 
 const PinMap PinMap_UART_TX[] = {
-    {PA_1,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-//  {PA_2,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-    {PA_2,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
-    {PA_4,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-    {PA_9,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
-//  {PA_14, LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-    {PA_14, UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
-//  {PB_6,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-    {PB_6,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART2)},
-    {NC,    NC,    0}
+    {PA_1,       LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
+    {PA_2,       UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)}, // Connected to STDIO_UART_TX
+    {PA_2_ALT0,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)}, // Connected to STDIO_UART_TX (Warning: no LPUART_1 on STDIO_UART_RX = PA_15)
+    {PA_4,       LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
+    {PA_9,       UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
+    {PA_14,      UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
+    {PA_14_ALT0, LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
+    {PB_6,       UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART2)},
+    {PB_6_ALT0,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
+    {NC, NC, 0}
 };
 
 const PinMap PinMap_UART_RX[] = {
-//  {PA_0,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-    {PA_0,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART2)},
-//  {PA_3,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-    {PA_3,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
-    {PA_10, UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
-    {PA_13, LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-    {PA_15, UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
-//  {PB_7,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
-    {PB_7,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART2)},
-    {NC,    NC,    0}
+    {PA_0,      UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART2)},
+    {PA_0_ALT0, LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
+    {PA_3,      UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
+    {PA_3_ALT0, LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
+    {PA_10,     UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
+    {PA_13,     LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
+    {PA_15,     UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)}, // Connected to STDIO_UART_RX
+    {PB_7,      UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_USART2)},
+    {PB_7_ALT0, LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_LPUART1)},
+    {NC, NC, 0}
 };
 
 const PinMap PinMap_UART_RTS[] = {
     {PA_1,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
+    {PA_12, UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
     {PB_0,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
     {PB_1,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_LPUART1)},
-    {PA_12, UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
-    {NC,    NC,       0}
+    {NC, NC, 0}
 };
 
 const PinMap PinMap_UART_CTS[] = {
@@ -149,7 +157,7 @@
     {PA_6,  LPUART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_LPUART1)},
     {PA_7,  UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
     {PA_11, UART_2,   STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_USART2)},
-    {NC,    NC,       0}
+    {NC, NC, 0}
 };
 
 //*** SPI ***
@@ -159,7 +167,7 @@
     {PA_12, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
     {PB_1,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_SPI1)},
     {PB_5,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
-    {NC,    NC,    0}
+    {NC, NC, 0}
 };
 
 const PinMap PinMap_SPI_MISO[] = {
@@ -168,18 +176,18 @@
     {PA_14, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
     {PB_0,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_SPI1)},
     {PB_4,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
-    {NC,    NC,    0}
+    {NC, NC, 0}
 };
 
 const PinMap PinMap_SPI_SCLK[] = {
     {PA_5,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
     {PA_13, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
-    {PB_3,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
-    {NC,    NC,    0}
+    {PB_3,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // Connected to LED
+    {NC, NC, 0}
 };
 
 const PinMap PinMap_SPI_SSEL[] = {
     {PA_4,  SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
-//  {PA_15, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, - used by STDIO RX
-    {NC,    NC,    0}
+//  {PA_15, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // Connected to STDIO_UART_RX
+    {NC, NC, 0}
 };