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Merge pull request #3429 from cesanta/w55rp20

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add W55RP20 example
This commit is contained in:
Sergio R. Caprile
2026-02-13 08:34:48 -03:00
committed by GitHub
parent 564c352d0c e83e13d8c6
commit eefec28b50
8 changed files with 300 additions and 0 deletions
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tutorials/pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin/CMakeLists.txt
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cmake_minimum_required(VERSION 3.13)
include(pico-sdk/pico_sdk_init.cmake)
project(firmware)
pico_sdk_init()
add_executable(firmware
main.c
mongoose.c
)
target_include_directories(firmware PUBLIC
.
)
target_link_libraries(firmware hardware_pio pico_stdlib pico_rand)
pico_add_extra_outputs(firmware) # create map/bin/hex file etc.
pico_enable_stdio_usb(firmware 1) # Route stdio
pico_enable_stdio_uart(firmware 0) # to USB
# Mongoose build flags in mongoose_config.h
# Example build options
tutorials/pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin/Makefile
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RM = rm -rf
MKBUILD = test -d build || mkdir build
ifeq ($(OS),Windows_NT)
RM = cmd /C del /Q /F /S
MKBUILD = if not exist build mkdir build
endif
all example:
true
build build/firmware.uf2: pico-sdk main.c
$(MKBUILD)
cd build && cmake -G "Unix Makefiles" .. && make
pico-sdk:
git clone --depth 1 -b 2.1.0 https://github.com/raspberrypi/pico-sdk $@
cd $@ && git submodule update --init
clean:
$(RM) pico-sdk build
.PHONY: build
tutorials/pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin/hal.h
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// Copyright (c) 2026 Cesanta Software Limited
// All rights reserved
#include "pico/stdlib.h"
#include "hardware/pio.h"
extern void mg_delayms(unsigned int ms);
#define SPIPIO pio0
#define SPISM 0
#define MOSIPIN 23
#define MISOPIN 22
#define CLKPIN 21
#define CSPIN 20
#define RSTPIN 25
// Try it on a bare Pico !
// #define MOSIPIN 3
// #define MISOPIN 4
// #define CLKPIN 2
// #define CSPIN 5
#define piospi_wrap_target 0
#define piospi_wrap 3
#define piospi_pio_version 0
static const uint16_t piospi_program_instructions[] = {
// .wrap_target
0xe027, // 0: set x, 7 side 0
0x6101, // 1: out pins, 1 side 0 [1]
0x5001, // 2: in pins, 1 side 1
0x1041, // 3: jmp x--, 1 side 1
// .wrap
};
static const struct pio_program piospi_program = {
.instructions = piospi_program_instructions,
.length = 4,
.origin = -1,
.pio_version = 0,
#if PICO_PIO_VERSION > 0
.used_gpio_ranges = 0x0
#endif
};
static inline pio_sm_config piospi_program_get_default_config(uint offset) {
pio_sm_config c = pio_get_default_sm_config();
sm_config_set_wrap(&c, offset + piospi_wrap_target, offset + piospi_wrap);
sm_config_set_sideset(&c, 1, false, false);
return c;
}
static inline pio_sm_config piospi_init(PIO pio, uint sm, uint addr, uint mosi, uint miso, uint clk) {
pio_gpio_init(pio, mosi);
pio_gpio_init(pio, miso);
pio_gpio_init(pio, clk);
pio_sm_set_pins_with_mask(pio, sm, 0, (1 << mosi) | (1 << clk));
pio_sm_config c = piospi_program_get_default_config(addr);
sm_config_set_out_pins(&c, mosi, 1);
sm_config_set_in_pins(&c, miso);
sm_config_set_set_pins(&c, mosi, 1);
sm_config_set_sideset_pins(&c, clk);
pio_sm_set_pindirs_with_mask(pio, sm, (1 << mosi) | (1 << clk), (1 << mosi) | (1 << clk));
sm_config_set_out_shift(&c, false, true, 8); // pull bytes, MSB first, auto
sm_config_set_in_shift(&c, false, true, 8); // push bytes, MSB first, auto
#if PICO_RP2040
sm_config_set_clkdiv(&c, 18); // Run at 133/1 = <33MHz (4x data rate)
#else
sm_config_set_clkdiv(&c, 20); // Run at 150/2 = <19MHz (4x data rate)
#endif
return c;
}
static pio_sm_config s_piospi_sm_config;
static uint s_piospi_sm_addr;
uint8_t hwspecific_spi_txn(void *arg, uint8_t data) {
(void) arg;
pio_sm_put(SPIPIO, SPISM, data << 24);
return pio_sm_get_blocking(SPIPIO, SPISM);
}
void hwspecific_spi_init(void) {
gpio_init(RSTPIN);
gpio_set_dir(RSTPIN, GPIO_OUT);
gpio_put(RSTPIN, 0);
gpio_init(CSPIN);
gpio_set_dir(CSPIN, GPIO_OUT);
gpio_put(CSPIN, 1);
s_piospi_sm_addr = pio_add_program(SPIPIO, &piospi_program);
s_piospi_sm_config = piospi_init(SPIPIO, SPISM, s_piospi_sm_addr, MOSIPIN, MISOPIN, CLKPIN);
mg_delayms(2);
gpio_put(RSTPIN, 1);
}
void hwspecific_spi_begin(void *arg) {
pio_sm_init(SPIPIO, SPISM, s_piospi_sm_addr, &s_piospi_sm_config);
pio_sm_set_enabled(SPIPIO, SPISM, true);
gpio_put(CSPIN, 0);
(void) arg;
}
void hwspecific_spi_end(void *arg) {
gpio_put(CSPIN, 1);
pio_sm_set_enabled(SPIPIO, SPISM, false);
(void) arg;
}
// Construct MAC address from the unique board ID
#include "pico/unique_id.h"
static inline void hal_ethernet_genmac(unsigned char *mac) {
pico_unique_board_id_t board_id;
pico_get_unique_board_id(&board_id);
mac[0] = 2;
memcpy(&mac[1], &board_id.id[3], 5);
}
tutorials/pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin/main.c
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// Copyright (c) 2025 Cesanta Software Limited
// All rights reserved
#include "mongoose.h"
#include "hal.h"
static const struct mg_tcpip_spi spi = {NULL, hwspecific_spi_begin, hwspecific_spi_end, hwspecific_spi_txn};
int main(void) {
// initialize stdio
stdio_init_all();
hwspecific_spi_init();
struct mg_mgr mgr; // Initialise Mongoose event manager
mg_mgr_init(&mgr); // and attach it to the interface
mg_log_set(MG_LL_DEBUG); // Set log level
// Initialise Mongoose network stack
// Either set use_dhcp or enter a static config.
// For static configuration, specify IP/mask/GW in network byte order
struct mg_tcpip_if mif = {
.ip = 0,
.driver = &mg_tcpip_driver_w5500,
.driver_data = (void *) &spi
};
hal_ethernet_genmac(mif.mac);
mg_tcpip_init(&mgr, &mif);
MG_INFO(("Init done, starting main loop"));
MG_INFO(("Initialising application..."));
MG_INFO(("Starting event loop"));
for (;;) {
mg_mgr_poll(&mgr, 0);
}
return 0;
}
tutorials/pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin/mongoose.c
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../../../mongoose.c
tutorials/pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin/mongoose.h
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../../../mongoose.h
tutorials/pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin/mongoose_config.h
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#define MG_ARCH MG_ARCH_PICOSDK
#define MG_ENABLE_TCPIP 1
#define MG_ENABLE_DRIVER_W5500 1
#define MG_ENABLE_TCPIP_DRIVER_INIT 0
#define MG_ENABLE_PACKED_FS 1
tutorials/pico-sdk/w55rp20-evb-pico-picosdk-baremetal-builtin/pico_sdk_import.cmake
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# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
# This can be dropped into an external project to help locate this SDK
# It should be include()ed prior to project()
if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_TAG} AND (NOT PICO_SDK_FETCH_FROM_GIT_TAG))
set(PICO_SDK_FETCH_FROM_GIT_TAG $ENV{PICO_SDK_FETCH_FROM_GIT_TAG})
message("Using PICO_SDK_FETCH_FROM_GIT_TAG from environment ('${PICO_SDK_FETCH_FROM_GIT_TAG}')")
endif ()
if (PICO_SDK_FETCH_FROM_GIT AND NOT PICO_SDK_FETCH_FROM_GIT_TAG)
set(PICO_SDK_FETCH_FROM_GIT_TAG "master")
message("Using master as default value for PICO_SDK_FETCH_FROM_GIT_TAG")
endif()
set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
set(PICO_SDK_FETCH_FROM_GIT_TAG "${PICO_SDK_FETCH_FROM_GIT_TAG}" CACHE FILEPATH "release tag for SDK")
if (NOT PICO_SDK_PATH)
if (PICO_SDK_FETCH_FROM_GIT)
include(FetchContent)
set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
if (PICO_SDK_FETCH_FROM_GIT_PATH)
get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
endif ()
# GIT_SUBMODULES_RECURSE was added in 3.17
if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.17.0")
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
GIT_SUBMODULES_RECURSE FALSE
)
else ()
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
)
endif ()
if (NOT pico_sdk)
message("Downloading Raspberry Pi Pico SDK")
FetchContent_Populate(pico_sdk)
set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
endif ()
set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
else ()
message(FATAL_ERROR
"SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
)
endif ()
endif ()
get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
if (NOT EXISTS ${PICO_SDK_PATH})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
endif ()
set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
endif ()
set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
include(${PICO_SDK_INIT_CMAKE_FILE})