Merge pull request #22 from cpq/eth

Add pico-w5500

Author: cpq

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
     - run: make -C step-5-cmsis
     - run: make -C step-6-clock
     - run: make -C step-7-webserver/nucleo-f429zi
-    - run: make -C step-7-webserver/pico-w
+    - run: make -C step-7-webserver/pico-w5500
   macos:
     runs-on: macos-latest
     steps:
@@ -29,4 +29,4 @@ jobs:
     - run: make -C step-5-cmsis
     - run: make -C step-6-clock
     - run: make -C step-7-webserver/nucleo-f429zi
-    - run: make -C step-7-webserver/pico-w
+    - run: make -C step-7-webserver/pico-w5500

README.md

@@ -15,7 +15,8 @@ table, startup code, linker script, build automation using `make`, GPIO
 peripheral and LED blinky, SysTick timer, UART peripheral and debug output,
 `printf` redirect to UART (IO retargeting), debugging with Segger Ozone,
 system clock setup, web server implementation with device dashboard, and
-automatic tests.
+automatic tests (including
+[automatic tests on a real hardware](https://github.com/cpq/continuous-hardware-test)).
 
 Throughout the guide, we will be using a
 [Nucleo-F429ZI](https://www.st.com/en/evaluation-tools/nucleo-f429zi.html)
@@ -32,7 +33,7 @@ Nucleo-F429ZI.
 | --------- | ---------------- | ------------- | ------------ |
 | [STM32 Nucleo-F429ZI](step-7-webserver/nucleo-f429zi/) | [mcu datasheet](https://www.st.com/resource/en/reference_manual/dm00031020-stm32f405-415-stm32f407-417-stm32f427-437-and-stm32f429-439-advanced-arm-based-32-bit-mcus-stmicroelectronics.pdf) | [board datasheet](https//www.st.com/resource/en/user_manual/dm00244518-stm32-nucleo144-boards-mb1137-stmicroelectronics.pdf) | complete |
 | [TI EK-TM4C1294XL](step-7-webserver/ek-tm4c1294xl/) |  [mcu datasheet](https://www.ti.com/lit/ds/symlink/tm4c1294ncpdt.pdf) | [board datasheet](https://www.ti.com/lit/ug/spmu365c/spmu365c.pdf) | complete |
-| [RP2040 Pico-W](step-7-webserver/pico-w/) | [mcu datasheet](https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf) | [board datasheet](https://datasheets.raspberrypi.com/picow/pico-w-datasheet.pdf) | in progress |
+| [RP2040 Pico-W5500](step-7-webserver/pico-w/) | [mcu datasheet](https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf) | [board datasheet](https://datasheets.raspberrypi.com/picow/pico-datasheet.pdf) | complete |
 
 Feel free to file an issue to support the board you work with.
 
@@ -1681,7 +1682,8 @@ run](https://github.com/cpq/bare-metal-programming-guide/actions/runs/3840030588
 
 Would it be great to also test built firmware binaries on a real hardware, to
 test not only the build process, but that the built firmware is correct and
-functional? Easy. See my other guide [COMING SOON] for detailed instructions.
+functional? Easy. See my https://github.com/cpq/continuous-hardware-test
+for detailed instructions.
 
 ## About the author
 

step-7-webserver/pico-w/main.c

@@ -1,20 +1,25 @@
 CFLAGS  ?=  -W -Wall -Wextra -Werror -Wundef -Wshadow -Wdouble-promotion \
             -Wformat-truncation -fno-common -Wconversion -ffreestanding \
-            -g3 -Os -ffunction-sections -fdata-sections -I. -Iinclude \
+            -g3 -Os -ffunction-sections -fdata-sections -I. \
             -mcpu=cortex-m0plus -mthumb $(EXTRA_CFLAGS)
 LDFLAGS ?= -Tlink.ld -nostartfiles --specs nano.specs -lc -lgcc -Wl,--gc-sections -Wl,-Map=$@.map
 SOURCES = main.c startup.c syscalls.c
 
+SOURCES += mongoose.c
+CFLAGS += -DMG_ARCH=MG_ARCH_NEWLIB -DMG_ENABLE_CUSTOM_MILLIS=1 -DMG_ENABLE_MIP=1
+
+build: firmware.uf2
+
 ifeq ($(OS),Windows_NT)
   RM = cmd /C del /Q /F
   BIN2UF2 = bin2uf2.exe
 else
   BIN2UF2 = ./bin2uf2
   RM = rm -f
+$(BIN2UF2): tools/bin2uf2.c
+	$(CC) -W -Wall $< -o $@
 endif
 
-build: firmware.uf2
-
 firmware.elf: $(SOURCES) mcu.h
 	arm-none-eabi-gcc $(SOURCES) $(CFLAGS) $(LDFLAGS) -o $@
 
@@ -24,8 +29,5 @@ firmware.bin: firmware.elf
 firmware.uf2: firmware.bin $(BIN2UF2)
 	$(BIN2UF2) $< $@
 
-$(BIN2UF2): tools/bin2uf2.c
-	$(CC) -W -Wall $< -o $@
-
 clean:
 	$(RM) firmware.* bin2uf2

step-7-webserver/pico-w/mcu.h

@@ -0,0 +1,79 @@
+// Copyright (c) 2023 Cesanta Software Limited
+// All rights reserved
+
+#include "mcu.h"
+#include "mongoose.h"
+
+enum { LED = 25, UART_TX = 0, UART_RX = 1 };                   // Pins
+enum { SPI_CS = 17, SPI_CLK = 18, SPI_TX = 19, SPI_RX = 16 };  // SPI pins
+enum { STATUS_TIMER_MS = 1000, BLINK_TIMER_MS = 500 };         // Timeouts
+
+void my_spi_begin(void *spi) {
+  spi_begin(spi);
+}
+void my_spi_end(void *spi) {
+  spi_end(spi);
+}
+uint8_t my_spi_txn(void *spi, uint8_t byte) {
+  uint8_t result = spi_txn(spi, byte);
+  // MG_INFO(("%x -> %x", byte, result));
+  return result;
+}
+
+void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    mg_http_reply(c, 200, "", "ok\n");
+  }
+  (void) ev_data, (void) fn_data;
+}
+
+static volatile uint32_t s_ticks;
+void SysTick_Handler(void) {  // SyStick IRQ handler, triggered every 1ms
+  s_ticks++;
+}
+
+uint64_t mg_millis(void) {
+  return s_ticks;
+}
+
+int main(void) {
+  clock_init();                                // Init clocks
+  uart_init(UART0, 115200, UART_RX, UART_TX);  // Init UART
+  gpio_init(LED, GPIO_MODE_OUTPUT, 0);         // Init LED
+
+  MG_INFO(("Starting ..."));
+
+  // Init SPI
+  struct spi spi0 = {
+      .miso = SPI_TX, .mosi = SPI_RX, .clk = SPI_CLK, .cs = SPI_CS, .spin = 50};
+  spi_init(&spi0);
+
+  // Init Mongoose
+  struct mip_spi spi = {&spi0, my_spi_begin, my_spi_end, my_spi_txn};
+  struct mip_if mif = {.mac = {2, 0, 1, 2, 3, 5},
+                       .driver = &mip_driver_w5500,
+                       .driver_data = &spi};
+  struct mg_mgr mgr;                                 // Declare event manager
+  mg_mgr_init(&mgr);                                 // Init event manager
+  mg_log_set(MG_LL_DEBUG);                           // Set DEBUG log level
+  //mip_init(&mgr, &mif);                              // Init TCP/IP stack
+  //mg_http_listen(&mgr, "http://0.0.0.0", fn, NULL);  // HTTP listener
+
+  bool led_on = false;                         // Initial LED state
+  uint32_t status_timer = 0, blink_timer = 0;  // Initial timer expirations
+
+  // Infinite event manager loop
+  for (;;) {
+    if (timer_expired(&blink_timer, BLINK_TIMER_MS, s_ticks)) {
+      led_on = !led_on;  // Flip LED state
+      // if (mip_driver_w5500.up(&mif)) led_on = true;  // Always on if Eth up
+      gpio_write(LED, led_on);  // Set LED
+    }
+    if (timer_expired(&status_timer, STATUS_TIMER_MS, s_ticks)) {
+      MG_INFO(("Ethernet: %s", mip_driver_w5500.up(&mif) ? "up" : "down"));
+    }
+    // mg_mgr_poll(&mgr, 1);
+  }
+
+  return 0;
+}