adafruit · wizhannah · Jun 17, 2025 · Jun 20, 2025 · Jun 24, 2025 · Jul 14, 2025
diff --git a/ports/raspberrypi/Makefile b/ports/raspberrypi/Makefile
@@ -83,6 +83,33 @@ SRC_CYW43 :=
 SRC_LWIP :=
 endif
 
+ifeq ($(CIRCUITPY_WIZNET_PIO_SPI), 1)
+INC_WIZNET_PIO_SPI := \
+	-isystem wiznet_pio_spi \
+
+SRC_WIZNET_PIO_SPI := \
+	wiznet_pio_spi/wizchip_pio_spi.c \
+
+WIZNET_PIOASM = $(BUILD)/pioasm/pioasm/pioasm
+.PHONY: pioasmBuild
+pioasmBuild: $(WIZNET_PIOASM)
+
+$(WIZNET_PIOASM):
+	$(Q)cmake -S pioasm -B $(BUILD)/pioasm
+	$(MAKE) -C $(BUILD)/pioasm pioasmBuild
+
+$(BUILD)/wizchip_pio_spi.pio.h: wiznet_pio_spi/wizchip_pio_spi.pio $(WIZNET_PIOASM)
+	$(Q)$(WIZNET_PIOASM) -o c-sdk $< $@
+$(BUILD)/wiznet_pio_spi/wizchip_pio_spi.o: $(BUILD)/wizchip_pio_spi.pio.h
+
+$(BUILD)/genhdr/qstr.i.last: $(BUILD)/wizchip_pio_spi.pio.h
+
+else
+INC_WIZNET_PIO_SPI :=
+SRC_WIZNET_PIO_SPI :=
+
+endif
+
 CHIP_VARIANT_LOWER = $(shell echo $(CHIP_VARIANT) | tr '[:upper:]' '[:lower:]')
 
 INC += \
@@ -155,6 +182,7 @@ INC += \
 	-isystem sdk/src/rp2_common/pico_time_adapter/include/ \
 	-isystem sdk/src/rp2_common/pico_unique_id/include/ \
 	$(INC_CYW43) \
+	$(INC_WIZNET_PIO_SPI) \
 	-Isdk_config \
 	-I../../lib/tinyusb/src \
 	-I../../supervisor/shared/usb \
@@ -541,6 +569,7 @@ SRC_C += \
 	mphalport.c \
 	$(SRC_CYW43) \
 	$(SRC_LWIP) \
+	$(SRC_WIZNET_PIO_SPI) \
 
 
 ifeq ($(CIRCUITPY_USB_HOST), 1)

diff --git a/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/board.c b/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/board.c
@@ -0,0 +1,9 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include "supervisor/board.h"
+
+// Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.
diff --git a/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/mpconfigboard.h b/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/mpconfigboard.h
@@ -0,0 +1,30 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#define MICROPY_HW_BOARD_NAME "W55RP20-EVB-Pico"
+#define MICROPY_HW_MCU_NAME "rp2040"
+
+#define MICROPY_HW_LED_STATUS (&pin_GPIO19)
+
+#define DEFAULT_SPI_BUS_SCK (&pin_GPIO21)
+#define DEFAULT_SPI_BUS_MOSI (&pin_GPIO23)
+#define DEFAULT_SPI_BUS_MISO (&pin_GPIO22)
+
+#define DEFAULT_UART_BUS_RX (&pin_GPIO1)
+#define DEFAULT_UART_BUS_TX (&pin_GPIO0)
+
+// Wiznet HW config.
+#define MICROPY_HW_WIZNET_PIO_SPI_ID        (0)
+#define MICROPY_HW_WIZNET_PIO_SPI_BAUDRATE  (20 * 1000 * 1000)
+#define MICROPY_HW_WIZNET_PIO_SPI_SCK       (21)
+#define MICROPY_HW_WIZNET_PIO_SPI_MOSI      (23)
+#define MICROPY_HW_WIZNET_PIO_SPI_MISO      (22)
+#define MICROPY_HW_WIZNET_PIO_PIN_CS        (20)
+#define MICROPY_HW_WIZNET_PIO_PIN_RST       (25)
+// Connecting the INTN pin enables RECV interrupt handling of incoming data.
+#define MICROPY_HW_WIZNET_PIN_INTN          (24)
diff --git a/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/mpconfigboard.mk b/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/mpconfigboard.mk
@@ -0,0 +1,14 @@
+USB_VID = 0x2E8A
+USB_PID = 0x0005
+USB_PRODUCT = "W55RP20-EVB-Pico"
+USB_MANUFACTURER = "WIZnet"
+
+CHIP_VARIANT = RP2040
+CHIP_FAMILY = rp2
+
+EXTERNAL_FLASH_DEVICES = "W25Q16JVxQ"
+
+CIRCUITPY_WIZNET_PIO_SPI = 1
+CIRCUITPY__EVE = 1
+CIRCUITPY_SSL = 1
+CIRCUITPY_USB_HOST = 0
diff --git a/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/pico-sdk-configboard.h b/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/pico-sdk-configboard.h
@@ -0,0 +1,9 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+// Put board-specific pico-sdk definitions here. This file must exist.
diff --git a/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/pins.c b/ports/raspberrypi/boards/wiznet_w55rp20_evb_pico/pins.c
@@ -0,0 +1,73 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include "shared-bindings/board/__init__.h"
+
+static const mp_rom_map_elem_t board_module_globals_table[] = {
+    CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
+
+    { MP_ROM_QSTR(MP_QSTR_GP0), MP_ROM_PTR(&pin_GPIO0) },
+    { MP_ROM_QSTR(MP_QSTR_GP1), MP_ROM_PTR(&pin_GPIO1) },
+    { MP_ROM_QSTR(MP_QSTR_GP2), MP_ROM_PTR(&pin_GPIO2) },
+    { MP_ROM_QSTR(MP_QSTR_GP3), MP_ROM_PTR(&pin_GPIO3) },
+    { MP_ROM_QSTR(MP_QSTR_GP4), MP_ROM_PTR(&pin_GPIO4) },
+    { MP_ROM_QSTR(MP_QSTR_GP5), MP_ROM_PTR(&pin_GPIO5) },
+    { MP_ROM_QSTR(MP_QSTR_GP6), MP_ROM_PTR(&pin_GPIO6) },
+    { MP_ROM_QSTR(MP_QSTR_GP7), MP_ROM_PTR(&pin_GPIO7) },
+    { MP_ROM_QSTR(MP_QSTR_GP8), MP_ROM_PTR(&pin_GPIO8) },
+    { MP_ROM_QSTR(MP_QSTR_GP9), MP_ROM_PTR(&pin_GPIO9) },
+    { MP_ROM_QSTR(MP_QSTR_GP10), MP_ROM_PTR(&pin_GPIO10) },
+    { MP_ROM_QSTR(MP_QSTR_GP11), MP_ROM_PTR(&pin_GPIO11) },
+    { MP_ROM_QSTR(MP_QSTR_GP12), MP_ROM_PTR(&pin_GPIO12) },
+    { MP_ROM_QSTR(MP_QSTR_GP13), MP_ROM_PTR(&pin_GPIO13) },
+    { MP_ROM_QSTR(MP_QSTR_GP14), MP_ROM_PTR(&pin_GPIO14) },
+    { MP_ROM_QSTR(MP_QSTR_GP15), MP_ROM_PTR(&pin_GPIO15) },
+
+    { MP_ROM_QSTR(MP_QSTR_LED), MP_ROM_PTR(&pin_GPIO19) },
+    { MP_ROM_QSTR(MP_QSTR_GP19), MP_ROM_PTR(&pin_GPIO19) },
+
+    { MP_ROM_QSTR(MP_QSTR_W5K_CS), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_GP20), MP_ROM_PTR(&pin_GPIO20) },
+
+    { MP_ROM_QSTR(MP_QSTR_W5K_SCK), MP_ROM_PTR(&pin_GPIO21) },
+    { MP_ROM_QSTR(MP_QSTR_GP21), MP_ROM_PTR(&pin_GPIO21) },
+
+    { MP_ROM_QSTR(MP_QSTR_W5K_MISO), MP_ROM_PTR(&pin_GPIO22) },
+    { MP_ROM_QSTR(MP_QSTR_GP22), MP_ROM_PTR(&pin_GPIO22) },
+
+    { MP_ROM_QSTR(MP_QSTR_W5K_MOSI), MP_ROM_PTR(&pin_GPIO23) },
+    { MP_ROM_QSTR(MP_QSTR_GP23), MP_ROM_PTR(&pin_GPIO23) },
+
+    { MP_ROM_QSTR(MP_QSTR_W5K_INT), MP_ROM_PTR(&pin_GPIO24) },
+    { MP_ROM_QSTR(MP_QSTR_GP24), MP_ROM_PTR(&pin_GPIO24) },
+
+    { MP_ROM_QSTR(MP_QSTR_W5K_RST), MP_ROM_PTR(&pin_GPIO25) },
+    { MP_ROM_QSTR(MP_QSTR_GP25), MP_ROM_PTR(&pin_GPIO25) },
+
+    { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_GP26_A0), MP_ROM_PTR(&pin_GPIO26) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP26), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_GPIO26) },
+
+    { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_GP27_A1), MP_ROM_PTR(&pin_GPIO27) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP27), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_GPIO27) },
+
+    { MP_ROM_QSTR(MP_QSTR_GP28_A2), MP_ROM_PTR(&pin_GPIO28) },
+    { MP_ROM_QSTR(MP_QSTR_GP28), MP_ROM_PTR(&pin_GPIO28) },
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_GPIO28) },
+
+    { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_GPIO29) },
+    { MP_ROM_QSTR(MP_QSTR_VOLTAGE_MONITOR), MP_ROM_PTR(&pin_GPIO29) },
+
+    { MP_ROM_QSTR(MP_QSTR_W5K_SPI), MP_ROM_PTR(&board_spi_obj) },
+    { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
+    { MP_ROM_QSTR(MP_QSTR_STEMMA_I2C), MP_ROM_PTR(&board_i2c_obj) },
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);
diff --git a/ports/raspberrypi/common-hal/busio/WIZNET_PIO_SPI.c b/ports/raspberrypi/common-hal/busio/WIZNET_PIO_SPI.c
@@ -0,0 +1,123 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#include "shared-bindings/busio/WIZNET_PIO_SPI.h"
+
+#include "shared/runtime/interrupt_char.h"
+#include "py/mperrno.h"
+#include "py/runtime.h"
+
+#include "supervisor/board.h"
+#include "common-hal/microcontroller/Pin.h"
+#include "shared-bindings/microcontroller/Pin.h"
+
+#include "hardware/dma.h"
+#include "hardware/gpio.h"
+#include "hardware/pio.h"
+#include "hardware/clocks.h"
+
+#include "wiznet_pio_spi/wizchip_pio_spi.h"
+
+#define NO_INSTANCE 0xff
+
+#ifndef PIO_SPI_PREFERRED_PIO
+#define PIO_SPI_PREFERRED_PIO 1
+#endif
+
+// All wiznet spi operations must start with writing a 3 byte header
+
+wiznet_pio_spi_config_t wiznet_pio_spi_config;
+wiznet_pio_spi_handle_t wiznet_pio_spi_handle = NULL;
+
+void common_hal_wiznet_pio_spi_construct(wiznet_pio_spi_obj_t *self,
+    const mcu_pin_obj_t *clock, const mcu_pin_obj_t *mosi,
+    const mcu_pin_obj_t *miso, bool half_duplex) {
+
+    if (half_duplex) {
+        mp_raise_NotImplementedError_varg(MP_ERROR_TEXT("%q"), MP_QSTR_half_duplex);
+    }
+
+    wiznet_pio_spi_config.data_in_pin = miso->number;
+    wiznet_pio_spi_config.data_out_pin = mosi->number;
+    wiznet_pio_spi_config.clock_pin = clock->number;
+
+    if (wiznet_pio_spi_handle != NULL) {
+        wiznet_pio_spi_close(wiznet_pio_spi_handle);
+    }
+
+    wiznet_pio_spi_handle = wiznet_pio_spi_open(&wiznet_pio_spi_config);
+    (*wiznet_pio_spi_handle)->set_active(wiznet_pio_spi_handle);
+
+}
+
+bool common_hal_wiznet_pio_spi_deinited(wiznet_pio_spi_obj_t *self) {
+    return wiznet_pio_spi_config.clock_pin == 0;
+}
+
+void common_hal_wiznet_pio_spi_deinit(wiznet_pio_spi_obj_t *self) {
+    if (common_hal_wiznet_pio_spi_deinited(self)) {
+        return;
+    }
+
+    common_hal_reset_pin(self->clock);
+    common_hal_reset_pin(self->MOSI);
+    common_hal_reset_pin(self->MISO);
+
+    wiznet_pio_spi_config.clock_pin = 0;
+}
+
+bool common_hal_wiznet_pio_spi_configure(wiznet_pio_spi_obj_t *self,
+    uint32_t baudrate, uint8_t polarity, uint8_t phase, uint8_t bits) {
+
+    uint32_t clock = clock_get_hz(clk_sys);
+    uint32_t clock_div = clock / baudrate;
+
+    if (clock_div > clock / 4) {
+        clock_div = clock / 4;
+    }
+
+    wiznet_pio_spi_config.clock_div_major = clock_div;
+    wiznet_pio_spi_config.clock_div_minor = 0;
+
+    return true;
+}
+
+bool common_hal_wiznet_pio_spi_try_lock(wiznet_pio_spi_obj_t *self) {
+    if (common_hal_wiznet_pio_spi_deinited(self)) {
+        return false;
+    }
+
+    bool grabbed_lock = false;
+    if (!self->has_lock) {
+        grabbed_lock = true;
+        self->has_lock = true;
+    }
+    return grabbed_lock;
+}
+
+bool common_hal_wiznet_pio_spi_has_lock(wiznet_pio_spi_obj_t *self) {
+    return self->has_lock;
+}
+
+void common_hal_wiznet_pio_spi_unlock(wiznet_pio_spi_obj_t *self) {
+    self->has_lock = false;
+}
+
+bool common_hal_wiznet_pio_spi_write(wiznet_pio_spi_obj_t *self,
+    const uint8_t *data, size_t len) {
+    wiznet_pio_spi_write_buffer(data, len);
+    return true;
+}
+
+bool common_hal_wiznet_pio_spi_read(wiznet_pio_spi_obj_t *self,
+    uint8_t *data, size_t len, uint8_t write_value) {
+    wiznet_pio_spi_read_buffer(data, len);
+    return true;
+}
+
+bool common_hal_wiznet_pio_spi_transfer(wiznet_pio_spi_obj_t *self, const uint8_t *data_out, uint8_t *data_in, size_t len) {
+    return wiznet_pio_spi_transfer(data_out, len, data_in, len);
+}
diff --git a/ports/raspberrypi/common-hal/busio/WIZNET_PIO_SPI.h b/ports/raspberrypi/common-hal/busio/WIZNET_PIO_SPI.h
@@ -0,0 +1,25 @@
+// This file is part of the CircuitPython project: https://circuitpython.org
+//
+// SPDX-FileCopyrightText: Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/obj.h"
+
+#include "hardware/spi.h"
+
+#define SPI_HEADER_LEN 3
+
+typedef struct {
+    mp_obj_base_t base;
+    bool has_lock;
+    const mcu_pin_obj_t *clock;
+    const mcu_pin_obj_t *MOSI;
+    const mcu_pin_obj_t *MISO;
+} wiznet_pio_spi_obj_t;
+
+void reset_spi(void);