Add support for our new Challenger RP2040 board with LTE modem. (#275)

* Adds support for Challenger RP2040 WiFi boards

* Added Challenger board to makeboards build script

* Adds new challenger board with LTE modem.

* Updated after getting approved PID from Raspberry Pi

tools/makeboards.py

@@ -143,4 +143,5 @@ MakeBoard("adafruit_macropad2040", "Adafruit", "MacroPad RP2040", "0x239a", "0x8
 MakeBoard("arduino_nano_connect", "Arduino", "Nano RP2040 Connect", "0x2341", "0x0058", "ARDUINO_NANO_RP2040_CONNECT", 16, "boot2_w25q080_2_padded_checksum")
 MakeBoard("sparkfun_promicrorp2040", "SparkFun", "ProMicro RP2040", "0x1b4f", "0x0026", "SPARKFUN_PROMICRO_RP2040", 16, "boot2_generic_03h_4_padded_checksum")
 MakeBoard("generic", "Generic", "RP2040", "0x2e8a", "0xf00a", "GENERIC_RP2040", 16, "boot2_generic_03h_4_padded_checksum")
-MakeBoard("challenger_2040_wifi", "iLabs", "Challenger 2040 WiFi", "0x2e8a", "0x1006", "CHALLENGER_2040_WIFI_RP2040", 8, "boot2_w25q080_4_padded_checksum")
+MakeBoard("challenger_2040_wifi", "iLabs", "Challenger 2040 WiFi", "0x2e8a", "0x1006", "CHALLENGER_2040_WIFI_RP2040", 8, "boot2_w25q080_2_padded_checksum")
+MakeBoard("challenger_2040_lte", "iLabs", "Challenger 2040 LTE", "0x2e8a", "0x100b", "CHALLENGER_2040_LTE_RP2040", 8, "boot2_w25q080_2_padded_checksum")

variants/challenger_2040_lte/pins_arduino.h

+#pragma once
+
+#define PINS_COUNT          (28u)
+#define NUM_DIGITAL_PINS    (28u)
+#define NUM_ANALOG_INPUTS   (4u)
+#define NUM_ANALOG_OUTPUTS  (0u)
+#define ADC_RESOLUTION      (12u)
+
+// LEDs
+#define PIN_LED             (19u)
+
+// Serial1 (User serial port)
+#define PIN_SERIAL1_TX      (16u)
+#define PIN_SERIAL1_RX      (17u)
+
+// Serial2, connected to SARA-R4XX modem
+#define PIN_SERIAL2_TX      (4u)
+#define PIN_SERIAL2_RX      (5u)
+#define PIN_SERIAL2_CTS     (6u)
+#define PIN_SERIAL2_RTS     (7u)
+#define PIN_SARA_ON         (13u)
+#define PIN_SARA_RST        (14u)
+#define PIN_SARA_PWR        (15u)
+
+// SPI
+#define PIN_SPI0_MISO       (24u)
+#define PIN_SPI0_MOSI       (23u)
+#define PIN_SPI0_SCK        (22u)
+#define PIN_SPI0_SS         (21u)
+
+// Not pinned out
+#define PIN_SPI1_MISO       (31u)
+#define PIN_SPI1_MOSI       (31u)
+#define PIN_SPI1_SCK        (31u)
+#define PIN_SPI1_SS         (31u)
+
+// Wire
+#define PIN_WIRE0_SDA       (0u)
+#define PIN_WIRE0_SCL       (1u)
+
+// Not pinned out
+#define PIN_WIRE1_SDA       (31u)
+#define PIN_WIRE1_SCL       (31u)
+
+#define SERIAL_HOWMANY      (2u)
+#define SPI_HOWMANY         (1u)
+#define WIRE_HOWMANY        (1u)
+
+#define LED_BUILTIN         PIN_LED
+
+static const uint8_t D0 =   (16u);
+static const uint8_t D1 =   (17u);
+static const uint8_t D2 =   (24u);
+static const uint8_t D3 =   (23u);
+static const uint8_t D4 =   (22u);
+static const uint8_t D5 =   (2u);
+static const uint8_t D6 =   (3u);
+static const uint8_t D7 =   (0u);
+static const uint8_t D8 =   (1u);
+static const uint8_t D9 =   (12u);
+static const uint8_t D10 =  (11u);
+static const uint8_t D11 =  (10u);
+static const uint8_t D12 =  (9u);
+static const uint8_t D13 =  (8u);
+static const uint8_t D14 =  (13u);
+static const uint8_t D15 =  (14u);
+static const uint8_t D16 =  (15u);
+static const uint8_t D17 =  (19u);
+
+static const uint8_t A0 =   (26u);
+static const uint8_t A1 =   (27u);
+static const uint8_t A2 =   (28u);
+static const uint8_t A3 =   (29u);
+static const uint8_t A4 =   (25u);
+static const uint8_t A5 =   (21u);