implement relais and lcd as modules

Does NOT compile!
Problem might be on the side of the ARM compiler.

.gitmodules

@@ -1,6 +1,3 @@
 [submodule "modules/pico-onewire"]
 	path = modules/pico-onewire
 	url = https://github.com/adamboardman/pico-onewire.git
-[submodule "modules/fmt"]
-	path = modules/fmt
-	url = https://github.com/fmtlib/fmt.git

.vscode/launch.json

@@ -1,4 +1,4 @@
-  {
+{
   // Use IntelliSense to learn about possible attributes.
   // Hover to view descriptions of existing attributes.
   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
@@ -11,19 +11,21 @@
       "request": "launch",
       "type": "cortex-debug",
       "servertype": "openocd",
-      "gdbPath": "gdb-multiarch",
+      "gdbPath" : "arm-none-eabi-gdb",
       "device": "RP2040",
+      //"showDevDebugOutput": "parsed",
       "configFiles": [
-        "interface/raspberrypi-swd.cfg",
+        "interface/picoprobe.cfg",
         "target/rp2040.cfg"
         ],
       "svdFile": "${env:PICO_SDK_PATH}/src/rp2040/hardware_regs/rp2040.svd",
       "runToEntryPoint": "main",
-      // Give restart the same functionality as runToEntryPoint - main
-      "postRestartCommands": [
-          "break main",
-          "continue"
-      ]
+      // Give restart the same functionality as runToMain
+      //"postRestartCommands": [
+      //    "break main",
+      //    "continue"
+      //],
+      "searchDir": ["${env:HOME}/src/openocd/tcl"],
     }
   ]
-}
+}

.vscode/settings.json

@@ -14,13 +14,7 @@
       "visibility": "hidden"
                },
      },
+    "cortex-debug.openocdPath": "${env:HOME}/src/openocd/src/openocd",
+    "cmake.generator": "Unix Makefiles",
     "C_Cpp.clang_format_fallbackStyle": "LLVM",
-    "files.watcherExclude": {
-      "**/.git/objects/**": true,
-      "**/.git/subtree-cache/**": true,
-      "**/node_modules/*/**": true,
-      "**/.hg/store/**": true,
-      ".flatpak/**": true,
-      "_build/**": true
-    },
 }

CMakeLists.txt

@@ -1,22 +1,21 @@
 cmake_minimum_required(VERSION 3.13)
 
 set(CMAKE_C_STANDARD 11)
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -fno-exceptions")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-volatile -fmodules-ts")
 
 # Initialise pico_sdk from installed location
 # (note this can come from environment, CMake cache etc)
-#set(PICO_SDK_PATH "/usr/share/pico-sdk")
+set(PICO_SDK_PATH "/usr/share/pico-sdk")
 
 # Pull in Raspberry Pi Pico SDK (must be before project)
 include("cmake/pico_sdk_import.cmake")
 
-project(gbmanager VERSION "1.0.3" LANGUAGES C CXX ASM)
+project(gbmanager VERSION "1.0.0" LANGUAGES C CXX ASM)
 
 # Initialise the Raspberry Pi Pico SDK
 pico_sdk_init()
 
 add_subdirectory(modules/pico-onewire)
-add_subdirectory(modules/fmt)
-add_subdirectory(src)
+add_subdirectory(src)

modules/fmt

@@ -1 +0,0 @@
-Subproject commit b6f4ceaed0a0a24ccf575fab6c56dd50ccf6f1a9

modules/pico-onewire

@@ -1 +1 @@
-Subproject commit 6399467cf7687ecb7f8f4e4923303349e0ecf160
+Subproject commit d5af2a1e1d81c3cb21805e332c8185607ee74b1d

src/CMakeLists.txt

@@ -1,10 +1,12 @@
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 configure_file(${CMAKE_CURRENT_LIST_DIR}/config.h.in ${CMAKE_CURRENT_BINARY_DIR}/config.h)
 
+#add_compile_options(-fmodules-ts)
+
 set(SOURCES
-    gbmanager.cpp
     lcd.cpp
     relais.cpp
+    gbmanager.cpp
 )
 
 # Add executable. Default name is the project name, version 0.1
@@ -14,15 +16,15 @@ pico_set_program_name(${CMAKE_PROJECT_NAME} "gbmanager")
 pico_set_program_version(${CMAKE_PROJECT_NAME} ${PROJECT_VERSION})
 
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
-    pico_enable_stdio_uart(${CMAKE_PROJECT_NAME} 0)
-    pico_enable_stdio_usb(${CMAKE_PROJECT_NAME} 1)
+    pico_enable_stdio_uart(${CMAKE_PROJECT_NAME} 1)
+    pico_enable_stdio_usb(${CMAKE_PROJECT_NAME} 0)
 else()
     pico_enable_stdio_uart(${CMAKE_PROJECT_NAME} 0)
     pico_enable_stdio_usb(${CMAKE_PROJECT_NAME} 0)
 endif()
 
 # Add the standard library to the build
-target_link_libraries(${CMAKE_PROJECT_NAME} pico_stdlib pico_one_wire fmt::fmt-header-only)
+target_link_libraries(${CMAKE_PROJECT_NAME} pico_stdlib pico_one_wire)
 
 # Add any user requested libraries
 target_link_libraries(${CMAKE_PROJECT_NAME}

src/gbmanager.cpp

@@ -1,13 +1,14 @@
-#include <string>
+#include <sstream>
 
-#include "../modules/fmt/include/fmt/format.h"
 #include "../modules/pico-onewire/api/one_wire.h"
 #include "hardware/i2c.h"
 #include "pico/stdlib.h"
 
 #include "config.h"
-#include "lcd.h"
-#include "relais.h"
+//#include "lcd.h"
+
+import lcd;
+import relais;
 
 // GPIOs used
 constexpr uint I2C_SDA_PIN = 26;
@@ -31,7 +32,7 @@ using std::string;
 
 void buttonPressedCallback(uint gpio, [[maybe_unused]] uint32_t events) {
     absolute_time_t now = get_absolute_time();
-    if (absolute_time_diff_us(lastPressed, now) < 500000) {
+    if (absolute_time_diff_us(lastPressed, now) < 750000) {
         return;
     } else {
         lastPressed = now;
@@ -55,7 +56,7 @@ int main() {
     stdio_init_all();
 
     // Initialize the LCD
-    auto myLCD = LCD(i2c1, I2C_SDA_PIN, I2C_SCL_PIN);
+    auto myLCD = LCD(i2c1, I2C_SDA_PIN, I2C_SCL_PIN, 16, 2);
     myLCD.clear();
 
     // Initialize the temp sensor
@@ -65,9 +66,7 @@ int main() {
     oneWire.single_device_read_rom(address);
 
     // Initialize the relais
-    // It need the button callback function, since it has to disable the on/off
-    // button for a short amount of time
-    Relais relais(RELAIS_PIN, &buttonPressedCallback);
+    Relais relais(RELAIS_PIN);
 
     // Initialize the Buttons
     gpio_set_irq_enabled_with_callback(BUTTON_1_PIN, GPIO_IRQ_EDGE_FALL, true,
@@ -79,19 +78,17 @@ int main() {
 
     float temp_act{0};
     float temp_diff{0.5};
-    string lcdText{};
+    std::stringstream lcdText{};
     bool isHeating = false;
     string heatInfo{""};
     string systemInfo{""};
 
-    lcdText = fmt::format(" G{}rbox Manager\n (Ver. {})", CUSTOM_CHAR_AE,
-                          PROJECT_VERSION);
-    myLCD.sendString(lcdText);
+    lcdText << " G" << CUSTOM_CHAR_AE << "rbox Manager\n (Ver. "
+            << PROJECT_VERSION << ")";
+    myLCD.sendString(lcdText.str());
     sleep_ms(3000);
 
     while (true) {
-        uint64_t destTime = time_us_64() + 1000000;
-
         oneWire.convert_temperature(address, true, false);
         temp_act = oneWire.temperature(address);
 
@@ -108,12 +105,14 @@ int main() {
 
         relais.activate(isHeating);
 
-        lcdText = fmt::format("ACT: {:05.2f}{}C {}\nTGT: {:05.2f}{}C {}",
-                              temp_act, CUSTOM_CHAR_DEG, heatInfo, temp_tgt,
-                              CUSTOM_CHAR_DEG, systemInfo);
-        myLCD.setCursor(0, 0);
-        myLCD.sendString(lcdText);
+        lcdText.str("");
+        lcdText.clear();
+        lcdText.precision(4);
+        lcdText << "ACT: " << temp_act << CUSTOM_CHAR_DEG << "C " << heatInfo
+                << "\n"
+                << "TGT: " << temp_tgt << CUSTOM_CHAR_DEG << "C " << systemInfo;
 
-        sleep_until((absolute_time_t){destTime});
+        myLCD.setCursor(0, 0);
+        myLCD.sendString(lcdText.str());
     }
-}
+}

src/lcd.cpp

@@ -1,6 +1,12 @@
-#include "pico/binary_info.h"
+module;
 
-#include "lcd.h"
+#include <string>
+
+#include "hardware/i2c.h"
+#include "pico/binary_info.h"
+#include "pico/stdlib.h"
+
+export module lcd;
 
 // commands
 constexpr int LCD_CLEARDISPLAY = 0x01;
@@ -29,74 +35,90 @@ constexpr int LCD_8BITMODE = 0x10;
 constexpr int LCD_BACKLIGHT = 0x08;
 constexpr int LCD_ENABLE_BIT = 0x04;
 
-LCD::LCD(i2c_inst_t *i2c, const uint gpio_sda, const uint gpio_scl,
-         const uint8_t i2c_addr, uint8_t num_cols, uint8_t num_lines)
-    : i2c{i2c}, i2c_addr{i2c_addr}, num_cols{num_cols}, num_lines{num_lines} {
-    i2c_init(i2c, 400 * 1000);
-    gpio_set_function(gpio_sda, GPIO_FUNC_I2C);
-    gpio_set_function(gpio_scl, GPIO_FUNC_I2C);
-    gpio_pull_up(gpio_sda);
-    gpio_pull_up(gpio_scl);
-    // Make the I2C pins available to picotool
-    bi_decl(bi_2pins_with_func(gpio_sda, gpio_scl, GPIO_FUNC_I2C));
+enum class Mode { COMMAND, CHARACTER };
 
-    sendByte(0x03, Mode::COMMAND);
-    sendByte(0x03, Mode::COMMAND);
-    sendByte(0x03, Mode::COMMAND);
-    sendByte(0x02, Mode::COMMAND);
+export class LCD {
+  public:
+    LCD(i2c_inst_t *i2c, const uint gpio_sda, const uint gpio_scl,
+        const uint8_t i2c_addr, const uint8_t num_cols = 16,
+        const uint8_t num_lines = 2)
+        : i2c{i2c}, i2c_addr{i2c_addr}, num_cols{num_cols}, num_lines{
+                                                                num_lines} {
+        i2c_init(i2c, 400 * 1000);
+        gpio_set_function(gpio_sda, GPIO_FUNC_I2C);
+        gpio_set_function(gpio_scl, GPIO_FUNC_I2C);
+        gpio_pull_up(gpio_sda);
+        gpio_pull_up(gpio_scl);
+        // Make the I2C pins available to picotool
+        bi_decl(bi_2pins_with_func(gpio_sda, gpio_scl, GPIO_FUNC_I2C));
 
-    sendByte(LCD_ENTRYMODESET | LCD_ENTRYLEFT, Mode::COMMAND);
-    sendByte(LCD_FUNCTIONSET | LCD_2LINE, Mode::COMMAND);
-    sendByte(LCD_DISPLAYCONTROL | LCD_DISPLAYON, Mode::COMMAND);
-    clear();
-}
+        sendByte(0x03, Mode::COMMAND);
+        sendByte(0x03, Mode::COMMAND);
+        sendByte(0x03, Mode::COMMAND);
+        sendByte(0x02, Mode::COMMAND);
 
-// Go to location on LCD
-void LCD::setCursor(int line, int position) {
-    int val = (line == 0) ? 0x80 + position : 0xC0 + position;
-    sendByte(val, Mode::COMMAND);
-    cursor_x = line;
-    cursor_y = position;
-}
+        sendByte(LCD_ENTRYMODESET | LCD_ENTRYLEFT, Mode::COMMAND);
+        sendByte(LCD_FUNCTIONSET | LCD_2LINE, Mode::COMMAND);
+        sendByte(LCD_DISPLAYCONTROL | LCD_DISPLAYON, Mode::COMMAND);
+        clear();
+    }
 
-void LCD::sendChar(char val) { sendByte(val, Mode::CHARACTER); }
-
-void LCD::sendString(const std::string &str) {
-    for (const char &c : str) {
-        if (c == '\n') {
-            cursor_y++;
-            setCursor(cursor_y, 0);
-        } else {
-            sendChar(c);
-            cursor_x++;
+    void sendString(const std::string &str) {
+        for (const char &c : str) {
+            if (c == '\n') {
+                cursor_y++;
+                setCursor(cursor_y, 0);
+            } else {
+                sendChar(c);
+                cursor_x++;
+            }
         }
     }
-}
 
-void LCD::clear() { sendByte(LCD_CLEARDISPLAY, Mode::COMMAND); }
+    // Go to location on LCD
+    void setCursor(int line, int position) {
+        int val = (line == 0) ? 0x80 + position : 0xC0 + position;
+        sendByte(val, Mode::COMMAND);
+        cursor_x = line;
+        cursor_y = position;
+    }
 
-void LCD::i2cWriteByte(uint8_t val) {
-    i2c_write_blocking(i2c, i2c_addr, &val, 1, false);
-}
+    void clear() { sendByte(LCD_CLEARDISPLAY, Mode::COMMAND); }
 
-void LCD::toggleEnable(uint8_t val) {
-    // Toggle enable pin on LCD display
-    // We cannot do this too quickly or things don't work
-    constexpr uint64_t DELAY_US = 600;
-    sleep_us(DELAY_US);
-    i2cWriteByte(val | LCD_ENABLE_BIT);
-    sleep_us(DELAY_US);
-    i2cWriteByte(val & ~LCD_ENABLE_BIT);
-    sleep_us(DELAY_US);
-}
+  private:
+    void sendChar(char val) { sendByte(val, Mode::CHARACTER); }
 
-// The display is sent a byte as two separate nibble transfers
-void LCD::sendByte(uint8_t val, Mode mode) {
-    uint8_t high = static_cast<int>(mode) | (val & 0xF0) | LCD_BACKLIGHT;
-    uint8_t low = static_cast<int>(mode) | ((val << 4) & 0xF0) | LCD_BACKLIGHT;
+    void i2cWriteByte(uint8_t val) {
+        i2c_write_blocking(i2c, i2c_addr, &val, 1, false);
+    }
 
-    i2cWriteByte(high);
-    toggleEnable(high);
-    i2cWriteByte(low);
-    toggleEnable(low);
-}
+    void toggleEnable(uint8_t val) {
+        // Toggle enable pin on LCD display
+        // We cannot do this too quickly or things don't work
+        constexpr uint64_t DELAY_US = 600;
+        sleep_us(DELAY_US);
+        i2cWriteByte(val | LCD_ENABLE_BIT);
+        sleep_us(DELAY_US);
+        i2cWriteByte(val & ~LCD_ENABLE_BIT);
+        sleep_us(DELAY_US);
+    }
+
+    // The display is sent a byte as two separate nibble transfers
+    void sendByte(uint8_t val, Mode mode) {
+        uint8_t high = static_cast<int>(mode) | (val & 0xF0) | LCD_BACKLIGHT;
+        uint8_t low =
+            static_cast<int>(mode) | ((val << 4) & 0xF0) | LCD_BACKLIGHT;
+
+        i2cWriteByte(high);
+        toggleEnable(high);
+        i2cWriteByte(low);
+        toggleEnable(low);
+    }
+
+    i2c_inst_t *i2c;
+    uint8_t i2c_addr;
+    uint8_t num_cols;
+    uint8_t num_lines;
+    uint8_t cursor_x{0};
+    uint8_t cursor_y{0};
+};

src/relais.cpp

@@ -1,35 +1,24 @@
-#include "relais.h"
+module;
 
-Relais::Relais(uint gpio, gpio_irq_callback_t callback)
-    : gpio{gpio}, callback{callback} {
-    gpio_init(gpio);
-    gpio_set_dir(gpio, GPIO_OUT);
-    off();
-}
+#include "hardware/gpio.h"
+#include "pico/stdlib.h"
 
-void Relais::activate(bool active) {
-    if (active == lastState) {
-        return;
+export module relais;
+
+export class Relais {
+  public:
+    Relais(uint gpio) : gpio{gpio} {
+        gpio_init(gpio);
+        gpio_set_dir(gpio, GPIO_OUT);
+        off();
     }
 
-    lastState = active;
+    void activate(bool active) { gpio_put(gpio, !active); }
 
-    gpio_set_irq_enabled_with_callback(BUTTON_1_PIN, GPIO_IRQ_EDGE_FALL, false,
-                                       callback);
-    gpio_set_irq_enabled_with_callback(BUTTON_2_PIN, GPIO_IRQ_EDGE_FALL, false,
-                                       callback);
-    gpio_set_irq_enabled_with_callback(BUTTON_3_PIN, GPIO_IRQ_EDGE_FALL, false,
-                                       callback);
-    gpio_put(gpio, !active);
-    sleep_ms(100);
-    gpio_set_irq_enabled_with_callback(BUTTON_1_PIN, GPIO_IRQ_EDGE_FALL, true,
-                                       callback);
-    gpio_set_irq_enabled_with_callback(BUTTON_2_PIN, GPIO_IRQ_EDGE_FALL, true,
-                                       callback);
-    gpio_set_irq_enabled_with_callback(BUTTON_3_PIN, GPIO_IRQ_EDGE_FALL, true,
-                                       callback);
-}
+    void on() { activate(true); }
 
-void Relais::on() { activate(true); }
+    void off() { activate(false); }
 
-void Relais::off() { activate(false); }
+  private:
+    uint gpio;
+};

src/relais.h

@@ -4,21 +4,15 @@
 #include "hardware/gpio.h"
 #include "pico/stdlib.h"
 
-extern const uint BUTTON_1_PIN; // declared in gbmanager.cpp
-extern const uint BUTTON_2_PIN; // declared in gbmanager.cpp
-extern const uint BUTTON_3_PIN; // declared in gbmanager.cpp
-
 class Relais {
   public:
-    Relais(uint gpio, gpio_irq_callback_t callback);
+    Relais(uint gpio);
     void activate(bool active);
     void on();
     void off();
 
   private:
     uint gpio;
-    bool lastState;
-    gpio_irq_callback_t callback;
 };
 
-#endif
+#endif