Add LoRa pins definition

LoRa module tested with this library:
https://github.com/sandeepmistry/arduino-LoRa

Config to add in arduino-LoRa example sketches:
  SPI.setMISO(RADIO_MISO_PORT);
  SPI.setMOSI(RADIO_MOSI_PORT);
  SPI.setSCLK(RADIO_SCLK_PORT);
  SPI.setSSEL(RADIO_NSS_PORT);
  LoRa.setPins(RADIO_NSS_PORT, RADIO_RESET_PORT, RADIO_DIO_0_PORT);

Note that a PR is under review for arduino-LoRa library to be able
to change the SPI instance used. So, instead of changing SPI pins,
a new instance could be created:

  SPIClass LoRaSPI(RADIO_MOSI_PORT, RADIO_MISO_PORT, RADIO_SCLK_PORT, RADIO_NSS_PORT);
  LoRa.setSPI(LoRaSPI);
  LoRa.setPins(RADIO_NSS_PORT, RADIO_RESET_PORT, RADIO_DIO_0_PORT);

Signed-off-by: Frederic.Pillon <frederic.pillon@st.com>

Author: fpistm

variants/DISCO_L072CZ_LRWAN1/PeripheralPins.c

@@ -192,7 +192,7 @@ const PinMap PinMap_UART_CTS[] = {
 
 #ifdef HAL_SPI_MODULE_ENABLED
 const PinMap PinMap_SPI_MOSI[] = {
-//  {PA_7,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // Not available on board
+    {PA_7,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // RADIO_MOSI_PORT
     {PA_12, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
     {PB_5,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
     {PB_15, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI2)},
@@ -202,7 +202,7 @@ const PinMap PinMap_SPI_MOSI[] = {
 
 #ifdef HAL_SPI_MODULE_ENABLED
 const PinMap PinMap_SPI_MISO[] = {
-//  {PA_6,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // Not available on board
+    {PA_6,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // RADIO_MISO_PORT
     {PA_11, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
 //  {PB_4,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // Not available on board
     {PB_14, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI2)},
@@ -214,7 +214,7 @@ const PinMap PinMap_SPI_MISO[] = {
 #ifdef HAL_SPI_MODULE_ENABLED
 const PinMap PinMap_SPI_SCLK[] = {
     {PA_5,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
-//  {PB_3,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // Not available on board
+    {PB_3,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // RADIO_SCLK_PORT
 //  {PB_10, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)}, // Not available on board
     {PB_13, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI2)},
     {NC,    NP,    0}
@@ -224,7 +224,7 @@ const PinMap PinMap_SPI_SCLK[] = {
 #ifdef HAL_SPI_MODULE_ENABLED
 const PinMap PinMap_SPI_SSEL[] = {
     {PA_4,  SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)},
-//  {PA_15, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // Not available on board
+    {PA_15, SPI1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI1)}, // RADIO_NSS_PORT
     {PB_9,  SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
     {PB_12, SPI2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_SPI2)},
     {NC,    NP,    0}

variants/DISCO_L072CZ_LRWAN1/variant.cpp

@@ -55,11 +55,20 @@ const PinName digitalPin[] = {
   PA_11, //D25
   PA_0,  //D26/A0
   PA_0,  //D27/A1 - alias for A0 - requires closing solder bridge SB7
-  PA_4,  //D28/A2
+  PA_4,  //D28/A2 - RADIO_DIO_5_PORT
   PA_4,  //D29/A3 - alias for A2 - requires closing solder bridge SB8
   PB_9,  //D30/A4 - requires closing solder bridge SB11
   PB_8,  //D31/A5 - requires closing solder bridge SB12
-  PA_5,  //D32/A6
+  PA_5,  //D32/A6 - RADIO_DIO_4_PORT
+  PC_0,  //D33 - RADIO_RESET_PORT
+  PA_7,  //D34 - RADIO_MOSI_PORT
+  PA_6,  //D35 - RADIO_MISO_PORT
+  PB_3,  //D36 - RADIO_SCLK_PORT
+  PA_15, //D37 - RADIO_NSS_PORT
+  PB_4,  //D38 - RADIO_DIO_0_PORT
+  PB_1,  //D39 - RADIO_DIO_1_PORT
+  PB_0,  //D40 - RADIO_DIO_2_PORT
+  PC_13, //D41 - RADIO_DIO_3_PORT
 };
 
 #ifdef __cplusplus

variants/DISCO_L072CZ_LRWAN1/variant.h

@@ -64,16 +64,25 @@ enum {
   PA11, //D25
   PA0,  //D26/A0
   PA0_2,//D27/A1 - alias for A0 - requires closing solder bridge SB7
-  PA4,  //D28/A2
+  PA4,  //D28/A2 - RADIO_DIO_5_PORT
   PA4_2,//D29/A3 - alias for A2 - requires closing solder bridge SB8
   PB9_2,//D30/A4 - requires closing solder bridge SB11
   PB8_2,//D31/A5 - requires closing solder bridge SB12
-  PA5,  //D32/A6
+  PA5,  //D32/A6 - RADIO_DIO_4_PORT
+  PC0,  //D33 - RADIO_RESET_PORT
+  PA7,  //D34 - RADIO_MOSI_PORT
+  PA6,  //D35 - RADIO_MISO_PORT
+  PB3,  //D36 - RADIO_SCLK_PORT
+  PA15, //D37 - RADIO_NSS_PORT
+  PB4,  //D38 - RADIO_DIO_0_PORT
+  PB1,  //D39 - RADIO_DIO_1_PORT
+  PB0,  //D40 - RADIO_DIO_2_PORT
+  PC13, //D41 - RADIO_DIO_3_PORT
   PEND
 };
 
 // This must be a literal with the same value as PEND
-#define NUM_DIGITAL_PINS        33
+#define NUM_DIGITAL_PINS        42
 // This must be a literal with a value less than or equal to to MAX_ANALOG_INPUTS
 #define NUM_ANALOG_INPUTS       7
 #define NUM_ANALOG_FIRST        26
@@ -92,8 +101,21 @@ enum {
 // On-board user button
 #define USER_BTN                6
 
-// Timer Definitions
-// Do not use timer used by PWM pins when possible. See PinMap_PWM.
+// LORA
+#define RADIO_RESET_PORT        PC0
+#define RADIO_MOSI_PORT         PA7
+#define RADIO_MISO_PORT         PA6
+#define RADIO_SCLK_PORT         PB3
+#define RADIO_NSS_PORT          PA15
+#define RADIO_DIO_0_PORT        PB4
+#define RADIO_DIO_1_PORT        PB1
+#define RADIO_DIO_2_PORT        PB0
+#define RADIO_DIO_3_PORT        PC13
+#define RADIO_DIO_4_PORT        PA5
+#define RADIO_DIO_5_PORT        PA4
+
+//Timer Definitions
+//Do not use timer used by PWM pins when possible. See PinMap_PWM.
 #define TIMER_TONE              TIM22
 
 // Do not use basic timer: OC is required