Add board header for Waveshare RP2350-USB-A (#2435)

* Add definition for the Waveshare RP2350-USB-A board

* Set XOSC startup delay multiplier for the RP2350-USB-A

* Update waveshare_rp2350_usb_a.h

Tweak to the PICO_DEFAULT_PIO_USB_DP_PIN define

---------

Co-authored-by: Andrew Scheller <[email protected]>

Author: sonodima

src/boards/include/boards/waveshare_rp2350_usb_a.h

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+// -----------------------------------------------------
+// NOTE: THIS HEADER IS ALSO INCLUDED BY ASSEMBLER SO
+//       SHOULD ONLY CONSIST OF PREPROCESSOR DIRECTIVES
+// -----------------------------------------------------
+
+#ifndef _BOARDS_WAVESHARE_RP2350_USB_A_H
+#define _BOARDS_WAVESHARE_RP2350_USB_A_H
+
+pico_board_cmake_set(PICO_PLATFORM, rp2350)
+
+// For board detection
+#define WAVESHARE_RP2350_USB_A
+
+// On some samples, the xosc can take longer to stabilize than is usual
+#ifndef PICO_XOSC_STARTUP_DELAY_MULTIPLIER
+#define PICO_XOSC_STARTUP_DELAY_MULTIPLIER 64
+#endif
+
+// --- RP2350 VARIANT ---
+#define PICO_RP2350A 1
+
+// --- UART ---
+#ifndef PICO_DEFAULT_UART
+#define PICO_DEFAULT_UART 0
+#endif
+#ifndef PICO_DEFAULT_UART_TX_PIN
+#define PICO_DEFAULT_UART_TX_PIN 0
+#endif
+#ifndef PICO_DEFAULT_UART_RX_PIN
+#define PICO_DEFAULT_UART_RX_PIN 1
+#endif
+
+// --- WS2812 ---
+#ifndef PICO_DEFAULT_WS2812_PIN
+#define PICO_DEFAULT_WS2812_PIN 16
+#endif
+
+// --- I2C ---
+#ifndef PICO_DEFAULT_I2C
+#define PICO_DEFAULT_I2C 1
+#endif
+#ifndef PICO_DEFAULT_I2C_SDA_PIN
+#define PICO_DEFAULT_I2C_SDA_PIN 6
+#endif
+#ifndef PICO_DEFAULT_I2C_SCL_PIN
+#define PICO_DEFAULT_I2C_SCL_PIN 7
+#endif
+
+// --- SPI ---
+#ifndef PICO_DEFAULT_SPI
+#define PICO_DEFAULT_SPI 0
+#endif
+#ifndef PICO_DEFAULT_SPI_SCK_PIN
+#define PICO_DEFAULT_SPI_SCK_PIN 2
+#endif
+#ifndef PICO_DEFAULT_SPI_TX_PIN
+#define PICO_DEFAULT_SPI_TX_PIN 3
+#endif
+#ifndef PICO_DEFAULT_SPI_RX_PIN
+#define PICO_DEFAULT_SPI_RX_PIN 4
+#endif
+#ifndef PICO_DEFAULT_SPI_CSN_PIN
+#define PICO_DEFAULT_SPI_CSN_PIN 5
+#endif
+
+// --- PIO USB ---
+#ifndef WAVESHARE_RP2350_USB_A_USB_DP_PIN
+#define WAVESHARE_RP2350_USB_A_USB_DP_PIN 12
+#endif
+#ifndef WAVESHARE_RP2350_USB_A_USB_DM_PIN
+#define WAVESHARE_RP2350_USB_A_USB_DM_PIN 13
+#endif
+#define PICO_DEFAULT_PIO_USB_DP_PIN WAVESHARE_RP2350_USB_A_USB_DP_PIN
+
+// --- FLASH ---
+#define PICO_BOOT_STAGE2_CHOOSE_W25Q080 1
+
+#ifndef PICO_FLASH_SPI_CLKDIV
+#define PICO_FLASH_SPI_CLKDIV 3
+#endif
+
+pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (2 * 1024 * 1024))
+#ifndef PICO_FLASH_SIZE_BYTES
+#define PICO_FLASH_SIZE_BYTES (2 * 1024 * 1024)
+#endif
+
+// Drive high to force power supply into PWM mode (lower ripple on 3V3 at light loads)
+#define PICO_SMPS_MODE_PIN 23
+
+pico_board_cmake_set_default(PICO_RP2350_A2_SUPPORTED, 1)
+#ifndef PICO_RP2350_A2_SUPPORTED
+#define PICO_RP2350_A2_SUPPORTED 1
+#endif
+
+#endif