Did something to YGantryMount. It works. trust me

can-interface/.devcontainer/Dockerfile

@@ -0,0 +1,47 @@
+FROM espressif/idf
+
+ARG DEBIAN_FRONTEND=nointeractive
+ARG CONTAINER_USER=esp
+ARG USER_UID=1050
+ARG USER_GID=$USER_UID
+
+RUN apt-get update \
+  && apt install -y -q \
+  cmake \
+  git \
+  libglib2.0-0 \
+  libnuma1 \
+  libpixman-1-0 \
+  && rm -rf /var/lib/apt/lists/*
+
+# QEMU
+ENV QEMU_REL=esp_develop_8.2.0_20240122
+ENV QEMU_SHA256=e7c72ef5705ad1444d391711088c8717fc89f42e9bf6d1487f9c2a326b8cfa83
+ENV QEMU_DIST=qemu-xtensa-softmmu-${QEMU_REL}-x86_64-linux-gnu.tar.xz
+ENV QEMU_URL=https://github.com/espressif/qemu/releases/download/esp-develop-8.2.0-20240122/${QEMU_DIST}
+
+ENV LC_ALL=C.UTF-8
+ENV LANG=C.UTF-8
+
+RUN wget --no-verbose ${QEMU_URL} \
+  && echo "${QEMU_SHA256} *${QEMU_DIST}" | sha256sum --check --strict - \
+  && tar -xf $QEMU_DIST -C /opt \
+  && rm ${QEMU_DIST}
+
+ENV PATH=/opt/qemu/bin:${PATH}
+
+RUN groupadd --gid $USER_GID $CONTAINER_USER \
+  && adduser --uid $USER_UID --gid $USER_GID --disabled-password --gecos "" ${CONTAINER_USER} \
+  && usermod -a -G root $CONTAINER_USER && usermod -a -G dialout $CONTAINER_USER
+
+RUN chmod -R 775 /opt/esp/python_env/
+
+USER ${CONTAINER_USER}
+ENV USER=${CONTAINER_USER}
+WORKDIR /home/${CONTAINER_USER}
+
+RUN echo "source /opt/esp/idf/export.sh > /dev/null 2>&1" >> ~/.bashrc
+
+ENTRYPOINT [ "/opt/esp/entrypoint.sh" ]
+
+CMD ["/bin/bash", "-c"]

can-interface/.devcontainer/devcontainer.json

@@ -0,0 +1,36 @@
+{
+	"name": "ESP-IDF QEMU",
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
+	"customizations": {
+		"vscode": {
+			"settings": {
+				"terminal.integrated.defaultProfile.linux": "bash",
+				"idf.espIdfPath": "/opt/esp/idf",
+				"idf.customExtraPaths": "",
+				"idf.pythonBinPath": "/opt/esp/python_env/idf5.4_py3.12_env/bin/python",
+				"idf.toolsPath": "/opt/esp",
+				"idf.gitPath": "/usr/bin/git"
+			},
+			"extensions": [
+				"espressif.esp-idf-extension"
+			]
+		},
+		"codespaces": {
+			"settings": {
+				"terminal.integrated.defaultProfile.linux": "bash",
+				"idf.espIdfPath": "/opt/esp/idf",
+				"idf.customExtraPaths": "",
+				"idf.pythonBinPath": "/opt/esp/python_env/idf5.4_py3.12_env/bin/python",
+				"idf.toolsPath": "/opt/esp",
+				"idf.gitPath": "/usr/bin/git"
+			},
+			"extensions": [
+				"espressif.esp-idf-extension",
+				"espressif.esp-idf-web"
+			]
+		}
+	},
+	"runArgs": ["--privileged"]
+}

can-interface/.vscode/c_cpp_properties.json

@@ -0,0 +1,23 @@
+{
+    "configurations": [
+        {
+            "name": "ESP-IDF",
+            "compilerPath": "${config:idf.toolsPath}/tools/xtensa-esp-elf/esp-13.2.0_20240530/xtensa-esp-elf/bin/xtensa-esp32-elf-gcc",
+            "compileCommands": "${config:idf.buildPath}/compile_commands.json",
+            "includePath": [
+                "${config:idf.espIdfPath}/components/**",
+                "${config:idf.espIdfPathWin}/components/**",
+                "${workspaceFolder}/**"
+            ],
+            "browse": {
+                "path": [
+                    "${config:idf.espIdfPath}/components",
+                    "${config:idf.espIdfPathWin}/components",
+                    "${workspaceFolder}"
+                ],
+                "limitSymbolsToIncludedHeaders": true
+            }
+        }
+    ],
+    "version": 4
+}

can-interface/.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "gdbtarget",
+      "request": "attach",
+      "name": "Eclipse CDT GDB Adapter"
+    },
+    {
+      "type": "espidf",
+      "name": "Launch",
+      "request": "launch"
+    }
+  ]
+}

can-interface/.vscode/settings.json

@@ -0,0 +1,26 @@
+{
+    "C_Cpp.intelliSenseEngine": "default",
+    "idf.adapterTargetName": "esp32",
+    "idf.customExtraPaths": "/home/alexander/.espressif/tools/xtensa-esp-elf-gdb/14.2_20240403/xtensa-esp-elf-gdb/bin:/home/alexander/.espressif/tools/riscv32-esp-elf-gdb/14.2_20240403/riscv32-esp-elf-gdb/bin:/home/alexander/.espressif/tools/xtensa-esp-elf/esp-13.2.0_20240530/xtensa-esp-elf/bin:/home/alexander/.espressif/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin:/home/alexander/.espressif/tools/esp32ulp-elf/2.38_20240113/esp32ulp-elf/bin:/home/alexander/.espressif/tools/openocd-esp32/v0.12.0-esp32-20240318/openocd-esp32/bin:/home/alexander/.espressif/tools/ninja/1.11.1:/home/alexander/.espressif/tools/esp-rom-elfs/20240305",
+    "idf.customExtraVars": {
+        "OPENOCD_SCRIPTS": "/home/alexander/.espressif/tools/openocd-esp32/v0.12.0-esp32-20240318/openocd-esp32/share/openocd/scripts",
+        "ESP_ROM_ELF_DIR": "/home/alexander/.espressif/tools/esp-rom-elfs/20240305/"
+    },
+    "idf.espIdfPath": "/opt/esp/v5.3.1/esp-idf",
+    "idf.openOcdConfigs": [
+        "board/esp32-wrover-kit-3.3v.cfg"
+    ],
+    "idf.port": "/dev/ttyUSB0",
+    "idf.pythonBinPath": "/home/alexander/.espressif/python_env/idf5.3_py3.12_env/bin/python",
+    "idf.toolsPath": "/home/alexander/.espressif",
+    "idf.flashType": "UART",
+    "files.associations": {
+        "*.tcc": "cpp",
+        "cstdint": "cpp",
+        "random": "cpp",
+        "future": "cpp",
+        "bitset": "cpp",
+        "string_view": "cpp",
+        "regex": "cpp"
+    }
+}

can-interface/.vscode/tasks.json

@@ -0,0 +1,259 @@
+{
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "Build - Build project",
+      "type": "shell",
+      "command": "${config:idf.pythonBinPath} ${config:idf.espIdfPath}/tools/idf.py build",
+      "windows": {
+        "command": "${config:idf.pythonBinPathWin} ${config:idf.espIdfPathWin}\\tools\\idf.py build",
+        "options": {
+          "env": {
+            "PATH": "${env:PATH};${config:idf.customExtraPaths}"
+          }
+        }
+      },
+      "options": {
+        "env": {
+          "PATH": "${env:PATH}:${config:idf.customExtraPaths}"
+        }
+      },
+      "problemMatcher": [
+        {
+          "owner": "cpp",
+          "fileLocation": [
+            "autoDetect",
+            "${workspaceFolder}"
+          ],
+          "pattern": {
+            "regexp": "^(.*?):(\\d+):(\\d*):?\\s+(?:fatal\\s+)?(warning|error):\\s+(.*)$",
+            "file": 1,
+            "line": 2,
+            "column": 3,
+            "severity": 4,
+            "message": 5
+          }
+        }
+      ],
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      }
+    },
+    {
+      "label": "Set ESP-IDF Target",
+      "type": "shell",
+      "command": "${command:espIdf.setTarget}",
+      "problemMatcher": {
+        "owner": "cpp",
+        "fileLocation": [
+          "autoDetect",
+          "${workspaceFolder}"
+        ],
+        "pattern": {
+          "regexp": "^(.*?):(\\d+):(\\d*):?\\s+(?:fatal\\s+)?(warning|error):\\s+(.*)$",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "severity": 4,
+          "message": 5
+        }
+      }
+    },
+    {
+      "label": "Clean - Clean the project",
+      "type": "shell",
+      "command": "${config:idf.pythonBinPath} ${config:idf.espIdfPath}/tools/idf.py fullclean",
+      "windows": {
+        "command": "${config:idf.pythonBinPathWin} ${config:idf.espIdfPathWin}\\tools\\idf.py fullclean",
+        "options": {
+          "env": {
+            "PATH": "${env:PATH};${config:idf.customExtraPaths}"
+          }
+        }
+      },
+      "options": {
+        "env": {
+          "PATH": "${env:PATH}:${config:idf.customExtraPaths}"
+        }
+      },
+      "problemMatcher": [
+        {
+          "owner": "cpp",
+          "fileLocation": [
+            "autoDetect",
+            "${workspaceFolder}"
+          ],
+          "pattern": {
+            "regexp": "^(.*?):(\\d+):(\\d*):?\\s+(?:fatal\\s+)?(warning|error):\\s+(.*)$",
+            "file": 1,
+            "line": 2,
+            "column": 3,
+            "severity": 4,
+            "message": 5
+          }
+        }
+      ]
+    },
+    {
+      "label": "Flash - Flash the device",
+      "type": "shell",
+      "command": "${config:idf.pythonBinPath} ${config:idf.espIdfPath}/tools/idf.py -p ${config:idf.port} -b ${config:idf.flashBaudRate} flash",
+      "windows": {
+        "command": "${config:idf.pythonBinPathWin} ${config:idf.espIdfPathWin}\\tools\\idf.py flash -p ${config:idf.portWin} -b ${config:idf.flashBaudRate}",
+        "options": {
+          "env": {
+            "PATH": "${env:PATH};${config:idf.customExtraPaths}"
+          }
+        }
+      },
+      "options": {
+        "env": {
+          "PATH": "${env:PATH}:${config:idf.customExtraPaths}"
+        }
+      },
+      "problemMatcher": [
+        {
+          "owner": "cpp",
+          "fileLocation": [
+            "autoDetect",
+            "${workspaceFolder}"
+          ],
+          "pattern": {
+            "regexp": "^(.*?):(\\d+):(\\d*):?\\s+(?:fatal\\s+)?(warning|error):\\s+(.*)$",
+            "file": 1,
+            "line": 2,
+            "column": 3,
+            "severity": 4,
+            "message": 5
+          }
+        }
+      ]
+    },
+    {
+      "label": "Monitor: Start the monitor",
+      "type": "shell",
+      "command": "${config:idf.pythonBinPath} ${config:idf.espIdfPath}/tools/idf.py -p ${config:idf.port} monitor",
+      "windows": {
+        "command": "${config:idf.pythonBinPathWin} ${config:idf.espIdfPathWin}\\tools\\idf.py -p ${config:idf.portWin} monitor",
+        "options": {
+          "env": {
+            "PATH": "${env:PATH};${config:idf.customExtraPaths}"
+          }
+        }
+      },
+      "options": {
+        "env": {
+          "PATH": "${env:PATH}:${config:idf.customExtraPaths}"
+        }
+      },
+      "problemMatcher": [
+        {
+          "owner": "cpp",
+          "fileLocation": [
+            "autoDetect",
+            "${workspaceFolder}"
+          ],
+          "pattern": {
+            "regexp": "^(.*?):(\\d+):(\\d*):?\\s+(?:fatal\\s+)?(warning|error):\\s+(.*)$",
+            "file": 1,
+            "line": 2,
+            "column": 3,
+            "severity": 4,
+            "message": 5
+          }
+        }
+      ],
+      "dependsOn": "Flash - Flash the device"
+    },
+    {
+      "label": "OpenOCD: Start openOCD",
+      "type": "shell",
+      "presentation": {
+        "echo": true,
+        "reveal": "never",
+        "focus": false,
+        "panel": "new"
+      },
+      "command": "openocd -s ${command:espIdf.getOpenOcdScriptValue} ${command:espIdf.getOpenOcdConfigs}",
+      "windows": {
+        "command": "openocd.exe -s ${command:espIdf.getOpenOcdScriptValue} ${command:espIdf.getOpenOcdConfigs}",
+        "options": {
+          "env": {
+            "PATH": "${env:PATH};${config:idf.customExtraPaths}"
+          }
+        }
+      },
+      "options": {
+        "env": {
+          "PATH": "${env:PATH}:${config:idf.customExtraPaths}"
+        }
+      },
+      "problemMatcher": {
+        "owner": "cpp",
+        "fileLocation": [
+          "autoDetect",
+          "${workspaceFolder}"
+        ],
+        "pattern": {
+          "regexp": "^(.*?):(\\d+):(\\d*):?\\s+(?:fatal\\s+)?(warning|error):\\s+(.*)$",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "severity": 4,
+          "message": 5
+        }
+      }
+    },
+    {
+      "label": "adapter",
+      "type": "shell",
+      "command": "${config:idf.pythonBinPath}",
+      "isBackground": true,
+      "options": {
+        "env": {
+          "PATH": "${env:PATH}:${config:idf.customExtraPaths}",
+          "PYTHONPATH": "${command:espIdf.getExtensionPath}/esp_debug_adapter/debug_adapter"
+        }
+      },
+      "problemMatcher": {
+        "background": {
+          "beginsPattern": "\bDEBUG_ADAPTER_STARTED\b",
+          "endsPattern": "DEBUG_ADAPTER_READY2CONNECT",
+          "activeOnStart": true
+        },
+        "pattern": {
+          "regexp": "(\\d+)-(\\d+)-(\\d+)\\s(\\d+):(\\d+):(\\d+),(\\d+)\\s-(.+)\\s(ERROR)",
+          "file": 8,
+          "line": 2,
+          "column": 3,
+          "severity": 4,
+          "message": 9
+        }
+      },
+      "args": [
+        "${command:espIdf.getExtensionPath}/esp_debug_adapter/debug_adapter_main.py",
+        "-e",
+        "${workspaceFolder}/build/${command:espIdf.getProjectName}.elf",
+        "-s",
+        "$OPENOCD_SCRIPTS",
+        "-dn",
+        "esp32",
+        "-om",
+        "connect_to_instance",
+        "-t",
+        "xtensa-esp32-elf-"
+
+      ],
+      "windows": {
+        "command": "${config:idf.pythonBinPathWin}",
+        "options": {
+          "env": {
+            "PATH": "${env:PATH};${config:idf.customExtraPaths}",
+            "PYTHONPATH": "${command:espIdf.getExtensionPath}/esp_debug_adapter/debug_adapter"
+          }
+        }
+      }
+    }
+  ]
+}

can-interface/CMakeLists.txt

@@ -0,0 +1,6 @@
+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(can-interface)

can-interface/a

@@ -0,0 +1,26 @@
+
+
+
+    txBuffer[0] = 0b00000011; // Read Instruction
+    txBuffer[1] = 0x0f; // CANCTRL Register Address
+
+    spi_transaction_t transaction0 = { // RESET
+        .cmd = 0b11000000,
+        .length = 3 * 8,
+        .rxlength = 3 * 8,
+        .tx_buffer = txBuffer,
+        .rx_buffer = rxBuffer
+    };
+
+    spi_transaction_t transaction1 = { // READ STAT/S
+        .cmd = 0b10110000,
+        .length = 2 * 8,
+        .rxlength = 2 * 8,
+        .tx_buffer = txBuffer,
+        .rx_buffer = rxBuffer
+    };
+
+
+    vTaskDelay(100 / portTICK_PERIOD_MS);
+    gpio_set_level(EXTERNAL_TRIGGER, false);
+    spi_device_transmit(mp2125_handle, &transaction0);

can-interface/components/mcp2521/CMakeLists.txt

@@ -0,0 +1,6 @@
+idf_component_register(SRCS
+                         "interface_commands.cpp"
+                       INCLUDE_DIRS "include"
+                       REQUIRES driver
+                       REQUIRES mcp2521_hardware_interface
+                       )

can-interface/components/mcp2521/include/bitfields.hpp

@@ -0,0 +1,177 @@
+#pragma once
+#include <cstdint>
+
+/**
+ * @brief RXnBF PIN CONTROL AND STATUS REGISTER (ADDRESS: 0Ch)
+ * 
+ */
+struct BFPCTRL {
+    uint8_t B0BFM : 1;
+    uint8_t B1BFM : 1;
+    uint8_t B0BFE : 1;
+    uint8_t B1BFE : 1;
+    uint8_t B0BFS : 1;
+    uint8_t B1BFS : 1;
+    uint8_t : 2;
+};
+
+/**
+ * @brief TXnRTS PIN CONTROL AND STATUS REGISTER
+ * 
+ */
+struct TXRTSCTRL {
+    uint8_t B0RTSM : 1;
+    uint8_t B1RTSM : 1;
+    uint8_t B2RTSM : 1;
+    uint8_t B0RTS : 1;
+    uint8_t B1RTS : 1;
+    uint8_t B2RTS : 1;
+    uint8_t : 2;
+};
+
+struct CANSTAT {
+    uint8_t ICOD0 : ;
+    uint8_t : 1;
+    uint8_t OPMOD0 : 1;
+    uint8_t OPMOD1 : 1;
+    uint8_t OPMOD2 : 1;
+    uint8_t : 1;
+};
+
+struct CANCTRL {
+    uint8_t CLKPRE0 : 1;
+    uint8_t CLKPRE1 : 1;
+    uint8_t CLKEN : 1;
+    uint8_t OSM : 1;
+    uint8_t ABAT : 1;
+    uint8_t REQOP0 : 1;
+    uint8_t REQOP1 : 1;
+    uint8_t REQOP2 : 1;
+};
+
+struct TEC {
+    uint8_t TEC;
+};
+
+struct REC {
+    uint8_t REC;
+};
+
+struct CNF3 {
+    uint8_t PHSEG20 : 1;
+    uint8_t PHSEG21 : 1;
+    uint8_t PHSEG22 : 1;
+    uint8_t : 3;
+    uint8_t WAKFIL : 1;
+    uint8_t SOF : 1;
+};
+
+struct CNF2 {
+    uint8_t PRSEG0 : 1;
+    uint8_t PRSEG1 : 1;
+    uint8_t PRSEG2 : 1;
+    uint8_t PHSEG10 : 1;
+    uint8_t PHSEG11 : 1;
+    uint8_t PHSEG12 : 1;
+    uint8_t SAM : 1;
+    uint8_t BTLMODE : 1;
+};
+
+struct CNF1 {
+    uint8_t BRP0 : 1;
+    uint8_t BRP1 : 1;
+    uint8_t BRP2 : 1;
+    uint8_t BRP3 : 1;
+    uint8_t BRP4 : 1;
+    uint8_t BRP5 : 1;
+    uint8_t SJW0 : 1;
+    uint8_t SJW1 : 1;
+};
+
+struct CANINTE {
+    uint8_t RX0IE : 1;
+    uint8_t RX1IE : 1;
+    uint8_t TX0IE : 1;
+    uint8_t TX1IE : 1;
+    uint8_t TX2IE : 1;
+    uint8_t ERRIE : 1;
+    uint8_t WAKIE : 1;
+    uint8_t MERRE : 1;
+};
+
+struct CANINTF {
+    uint8_t RX0IF : 1;
+    uint8_t RX1IF : 1;
+    uint8_t TX0IF : 1;
+    uint8_t TX1IF : 1;
+    uint8_t TX2IF : 1;
+    uint8_t ERRIF : 1;
+    uint8_t WAKIF : 1;
+    uint8_t MERRF : 1;
+};
+
+struct EFLG {
+    uint8_t EWARN : 1;
+    uint8_t RXWAR : 1;
+    uint8_t TXWAR : 1;
+    uint8_t RXEP : 1;
+    uint8_t TXEP : 1;
+    uint8_t TXBO : 1;
+    uint8_t RX0OVR : 1;
+    uint8_t RX1OVR : 1;
+};
+
+struct TXB0CTRL {
+    uint8_t TXP0 : 1;
+    uint8_t TXP1 : 1;
+    uint8_t : 1;
+    uint8_t TXREQ : 1;
+    uint8_t TXERR : 1;
+    uint8_t MLOA : 1;
+    uint8_t ABTF : 1;
+    uint8_t : 1;
+};
+
+struct TXB1CTRL {
+    uint8_t TXP0 : 1;
+    uint8_t TXP1 : 1;
+    uint8_t : 1;
+    uint8_t TXREQ : 1;
+    uint8_t TXERR : 1;
+    uint8_t MLOA : 1;
+    uint8_t ABTF : 1;
+    uint8_t : 1;
+};
+
+struct TXB2CTRL {
+    uint8_t TXP0 : 1;
+    uint8_t TXP1 : 1;
+    uint8_t : 1;
+    uint8_t TXREQ : 1;
+    uint8_t TXERR : 1;
+    uint8_t MLOA : 1;
+    uint8_t ABTF : 1;
+    uint8_t : 1;
+};
+
+struct RXB0CTRL {
+    uint8_t FILHIT0 : 1;
+    uint8_t BUKT1 : 1;
+    uint8_t BUKT : 1;
+    uint8_t RXRTR : 1;
+    uint8_t : 1;
+    uint8_t RXM0 : 1;
+    uint8_t RXM1 : 1;
+    uint8_t : 1;
+};
+
+struct RXB1CTRL {
+    uint8_t FILHIT0 : 1;
+    uint8_t FILHIT1 : 1;
+    uint8_t FILHIT2 : 1;
+    uint8_t RXRTR : 1;
+    uint8_t : 1;
+    uint8_t RXM0 : 1;
+    uint8_t RXM1 : 1;
+    uint8_t : 1;
+};

can-interface/components/mcp2521/include/mcp2521.hpp

@@ -0,0 +1,5 @@
+#pragma once
+
+#include "mcp2521_command.hpp"
+#include "mcp2521_hardware_esp.hpp"
+#include "mcp2521_addresses.hpp"

can-interface/components/mcp2521/include/mcp2521_addresses.hpp

@@ -0,0 +1,164 @@
+#pragma once
+
+#define MCP2521_BFPCTRL 0x0C
+#define MCP2521_BFPCTRL_B1BFS (1 << 5)
+#define MCP2521_BFPCTRL_B0BFS (1 << 4)
+#define MCP2521_BFPCTRL_B1BFE (1 << 3)
+#define MCP2521_BFPCTRL_B0BFE (1 << 2)
+#define MCP2521_BFPCTRL_B1BFM (1 << 1)
+#define MCP2521_BFPCTRL_B0BFM (1 << 0)
+
+#define MCP2521_TXRTSCTRL 0x0D
+#define MCP2521_TXRTSCTRL_B2RTS (1 << 5)
+#define MCP2521_TXRTSCTRL_B1RTS (1 << 4)
+#define MCP2521_TXRTSCTRL_B0RTS (1 << 3)
+#define MCP2521_TXRTSCTRL_B2RTSM (1 << 2)
+#define MCP2521_TXRTSCTRL_B1RTSM (1 << 1)
+#define MCP2521_TXRTSCTRL_B0RTSM (1 << 0)
+
+#define MCP2521_CANSTAT 0x0E
+#define MCP2521_CANSTAT_OPMOD2 (1 << 7)
+#define MCP2521_CANSTAT_OPMOD1 (1 << 6)
+#define MCP2521_CANSTAT_OPMOD0 (1 << 5)
+#define MCP2521_CANSTAT_ICOD2 (1 << 2)
+#define MCP2521_CANSTAT_ICOD1 (1 << 1)
+#define MCP2521_CANSTAT_ICOD0 (1 << 0)
+
+struct CANSTAT_Register {
+    uint8_t ICOD : 3;
+    uint8_t : 1; // Unused bit
+    uint8_t OPMOD : 3;
+    uint8_t : 1; // Unused bit
+};
+
+#define MCP2521_CANCTRL 0x0F
+#define MCP2521_CANCTRL_REQOP2 (1 << 7)
+#define MCP2521_CANCTRL_REQOP1 (1 << 6)
+#define MCP2521_CANCTRL_REQOP0 (1 << 5)
+#define MCP2521_CANCTRL_ABAT (1 << 4)
+#define MCP2521_CANCTRL_OSM (1 << 3)
+#define MCP2521_CANCTRL_CLKEN (1 << 2)
+#define MCP2521_CANCTRL_CLKPRE1 (1 << 1)
+#define MCP2521_CANCTRL_CLKPRE0 (1 << 0)
+
+#define MCP2521_TEC 0x1C
+
+#define MCP2521_REC 0x1D
+
+#define MCP2521_CNF3 0x28
+#define MCP2521_CNF3_SOF (1 << 7)
+#define MCP2521_CNF3_WAKFIL (1 << 6)
+#define MCP2521_CNF3_PHSEG22 (1 << 2)
+#define MCP2521_CNF3_PHSEG21 (1 << 1)
+#define MCP2521_CNF3_PHSEG20 (1 << 0)
+
+#define MCP2521_CNF2 0x29
+#define MCP2521_CNF2_BTLMODE (1 << 7)
+#define MCP2521_CNF2_SAM (1 << 6)
+#define MCP2521_CNF2_PHSEG12 (1 << 5)
+#define MCP2521_CNF2_PHSEG11 (1 << 4)
+#define MCP2521_CNF2_PHSEG10 (1 << 3)
+#define MCP2521_CNF2_PRSEG2 (1 << 2)
+#define MCP2521_CNF2_PRSEG1 (1 << 1)
+#define MCP2521_CNF2_PRSEG0 (1 << 0)
+
+#define MCP2521_CNF1 0x2A
+#define MCP2521_CNF1_SJW1 (1 << 7)
+#define MCP2521_CNF1_SJW0 (1 << 6)
+#define MCP2521_CNF1_BRP5 (1 << 5)
+#define MCP2521_CNF1_BRP4 (1 << 4)
+#define MCP2521_CNF1_BRP3 (1 << 3)
+#define MCP2521_CNF1_BRP2 (1 << 2)
+#define MCP2521_CNF1_BRP1 (1 << 1)
+#define MCP2521_CNF1_BRP0 (1 << 0)
+
+#define MCP2521_CANINTE 0x2B
+#define MCP2521_CANINTE_MERRE (1 << 7)
+#define MCP2521_CANINTE_WAKIE (1 << 6)
+#define MCP2521_CANINTE_ERRIE (1 << 5)
+#define MCP2521_CANINTE_TX2IE (1 << 4)
+#define MCP2521_CANINTE_TX1IE (1 << 3)
+#define MCP2521_CANINTE_TX0IE (1 << 2)
+#define MCP2521_CANINTE_RX1IE (1 << 1)
+#define MCP2521_CANINTE_RX0IE (1 << 0)
+
+#define MCP2521_CANINTF 0x2C
+#define MCP2521_CANINTF_MERRF (1 << 7)
+#define MCP2521_CANINTF_WAKIF (1 << 6)
+#define MCP2521_CANINTF_ERRIF (1 << 5)
+#define MCP2521_CANINTF_TX2IF (1 << 4)
+#define MCP2521_CANINTF_TX1IF (1 << 3)
+#define MCP2521_CANINTF_TX0IF (1 << 2)
+#define MCP2521_CANINTF_RX1IF (1 << 1)
+#define MCP2521_CANINTF_RX0IF (1 << 0)
+
+#define MCP2521_EFLG 0x2D
+#define MCP2521_EFLG_RX1OVR (1 << 7)
+#define MCP2521_EFLG_RX0OVR (1 << 6)
+#define MCP2521_EFLG_TXBO (1 << 5)
+#define MCP2521_EFLG_TXEP (1 << 4)
+#define MCP2521_EFLG_RXEP (1 << 3)
+#define MCP2521_EFLG_TXWAR (1 << 2)
+#define MCP2521_EFLG_RXWAR (1 << 1)
+#define MCP2521_EFLG_EWARN (1 << 0)
+
+#define MCP2521_TXB0CTRL 0x30
+#define MCP2521_TXB0CTRL_ABTF (1 << 6)
+#define MCP2521_TXB0CTRL_MLOA (1 << 5)
+#define MCP2521_TXB0CTRL_TXERR (1 << 4)
+#define MCP2521_TXB0CTRL_TXREQ (1 << 3)
+#define MCP2521_TXB0CTRL_TXP1 (1 << 1)
+#define MCP2521_TXB0CTRL_TXP0 (1 << 0)
+
+#define MCP2521_TXB1CTRL 0x40
+#define MCP2521_TXB1CTRL_ABTF (1 << 6)
+#define MCP2521_TXB1CTRL_MLOA (1 << 5)
+#define MCP2521_TXB1CTRL_TXERR (1 << 4)
+#define MCP2521_TXB1CTRL_TXREQ (1 << 3)
+#define MCP2521_TXB1CTRL_TXP1 (1 << 1)
+#define MCP2521_TXB1CTRL_TXP0 (1 << 0)
+
+#define MCP2521_TXB2CTRL 0x50
+#define MCP2521_TXB2CTRL_ABTF (1 << 6)
+#define MCP2521_TXB2CTRL_MLOA (1 << 5)
+#define MCP2521_TXB2CTRL_TXERR (1 << 4)
+#define MCP2521_TXB2CTRL_TXREQ (1 << 3)
+#define MCP2521_TXB2CTRL_TXP1 (1 << 1)
+#define MCP2521_TXB2CTRL_TXP0 (1 << 0)
+
+struct TXBnCTRL_Register {
+    uint8_t TXP : 2;
+    uint8_t : 1; // Unused bit
+    uint8_t TXREQ : 1;
+    uint8_t TXERR : 1;
+    uint8_t MLOA : 1;
+    uint8_t ABTF : 1;
+    uint8_t : 1; // Unused bit
+};
+
+
+#define MCP2521_RXB0CTRL 0x60
+#define MCP2521_RXB0CTRL_RXM1 (1 << 6)
+#define MCP2521_RXB0CTRL_RXM0 (1 << 5)
+#define MCP2521_RXB0CTRL_RXRTR (1 << 3)
+#define MCP2521_RXB0CTRL_BUKT (1 << 2)
+#define MCP2521_RXB0CTRL_BUKT1 (1 << 1)
+#define MCP2521_RXB0CTRL_FILHIT0 (1 << 0)
+
+#define MCP2521_RXB1CTRL 0x70
+#define MCP2521_RXB1CTRL_RXM1 (1 << 6)
+#define MCP2521_RXB1CTRL_RXM0 (1 << 5)
+#define MCP2521_RXB1CTRL_RXRTR (1 << 3)
+#define MCP2521_RXB1CTRL_FILHIT2 (1 << 2)
+#define MCP2521_RXB1CTRL_FILHIT1 (1 << 1)
+#define MCP2521_RXB1CTRL_FILHIT0 (1 << 0)
+
+#define MCP2521_OP_RESET            0b11000000
+#define MCP2521_OP_READ             0b00000011
+#define MCP2521_OP_READ_RX_BUFFER   0b10010000
+#define MCP2521_OP_WRITE            0b00000010
+#define MCP2521_OP_LOAD_TX_BUFFER   0b01000000
+#define MCP2521_OP_RTS              0b10000000
+#define MCP2521_OP_READ_STATUS      0b10100000
+#define MCP2521_OP_RX_STATUS        0b10110000
+#define MCP2521_OP_BIT_MODIFY       0b00000101

can-interface/components/mcp2521/include/mcp2521_command.hpp

@@ -0,0 +1,53 @@
+#pragma once
+#include "mcp2521_addresses.hpp"
+
+#include <stdint.h>
+
+#include "mcp2521_hardware_handle.hpp"
+
+enum MCP2521_RX_BUFFER {
+    RXB0 = 0,
+    RXB1 = 1
+};
+
+enum MCP2521_TX_BUFFER {
+    TXB0 = 0,
+    TXB1 = 1,
+    TXB2 = 2
+};
+
+enum MCP2521_BUFFER_TYPE {
+    ID = 0,
+    DATA = 1
+};
+
+class MCP2521_Command_Interface {
+private:
+    MCP2521_Hardware_Handle * hardware_handle;
+public:
+
+    MCP2521_Command_Interface(
+        MCP2521_Hardware_Handle * hardware_handle
+    );
+
+    void reset();
+    
+    void read_reg(uint8_t address, uint8_t *data, size_t length);
+    uint8_t read_reg(uint8_t address);
+
+    void read_rx_buf(MCP2521_RX_BUFFER buffer, MCP2521_BUFFER_TYPE type, uint8_t *data, size_t length);
+    
+    void write_reg(uint8_t address, uint8_t *data, size_t length);
+    void write_reg(uint8_t address, uint8_t data);
+
+    void write_tx_buf(MCP2521_TX_BUFFER buffer, MCP2521_BUFFER_TYPE type, uint8_t *data, size_t length);
+
+    void request_to_send(bool txb2, bool txb1, bool txb0);
+    void request_to_send(MCP2521_TX_BUFFER buffer);
+
+    uint8_t read_status();
+    uint8_t read_rx_status();
+
+    void bit_modify(uint8_t address, uint8_t mask, uint8_t data);
+};
+

can-interface/components/mcp2521/include/mcp2521_register.hpp

@@ -0,0 +1,52 @@
+#pragma once
+#include <stdint.h>
+
+#include "mcp2521.hpp"
+
+
+
+class MCP2515 {
+    private:
+
+
+
+    
+    public:
+        MCP2515();
+        ~MCP2515();
+
+        void reset();
+
+        // Interrupts
+
+        void register_rx_callback(void (*callback)(uint32_t id, uint8_t *data, size_t length));
+        void register_tx_callback(void (*callback)(MCP2521_TX_BUFFER buffer));
+        void register_error_callback(void (*callback)(uint8_t error_flags));
+        void register_message_error_callback(void (*callback)(uint8_t error_flags));
+
+        // Transmittion
+        void set_tx_id(MCP2521_TX_BUFFER buffer, uint32_t id);
+        void set_tx_data(MCP2521_TX_BUFFER buffer, uint8_t *data, size_t length);
+        void set_tx_priority(MCP2521_TX_BUFFER buffer, uint8_t priority);
+        void set_one_shot(MCP2521_TX_BUFFER buffer, bool one_shot);
+
+        void request_to_send(MCP2521_TX_BUFFER buffer);
+        void request_to_send(bool txb2, bool txb1, bool txb0);
+
+        void abort_tx(MCP2521_TX_BUFFER buffer);
+        void abort_all_tx();
+
+        TXBnCTRL_Register get_TXBnCTRL(MCP2521_TX_BUFFER buffer);
+
+        void transmit(MCP2521_TX_BUFFER buffer, uint32_t id, uint8_t *data, size_t length, uint8_t priority, bool one_shot);
+
+        // Reception
+
+
+
+        uint8_t get_TransmitErrorCounter();
+        uint8_t get_ReceiveErrorCounter();
+
+
+
+};

can-interface/components/mcp2521/interface_commands.cpp

@@ -0,0 +1,76 @@
+#include <cstring>
+
+#include "mcp2521.hpp"
+#include "mcp2521_addresses.hpp"
+
+MCP2521_Command_Interface::MCP2521_Command_Interface(
+    MCP2521_Hardware_Handle * hardware_handle
+) {
+    this->hardware_handle = hardware_handle;
+}
+
+void MCP2521_Command_Interface::reset() {
+    hardware_handle->execute(MCP2521_OP_RESET);
+}
+
+void MCP2521_Command_Interface::read_reg(uint8_t address, uint8_t *data, size_t length) {
+    hardware_handle->read(MCP2521_OP_READ, data, length, address);
+}
+
+uint8_t MCP2521_Command_Interface::read_reg(uint8_t address) {
+    return hardware_handle->read(MCP2521_OP_READ, address);
+}
+
+void MCP2521_Command_Interface::read_rx_buf(MCP2521_RX_BUFFER buffer, MCP2521_BUFFER_TYPE type, uint8_t *data, size_t length) {
+    uint8_t address = (buffer << 1) | (type << 2);
+    hardware_handle->read(MCP2521_OP_READ_RX_BUFFER | address, data, length);
+}
+
+void MCP2521_Command_Interface::write_reg(uint8_t address, uint8_t *data, size_t length) {
+    hardware_handle->write(MCP2521_OP_WRITE, data, length, address);
+}
+
+void MCP2521_Command_Interface::write_reg(uint8_t address, uint8_t data) {
+    hardware_handle->write(MCP2521_OP_WRITE, data, address);
+}
+
+void MCP2521_Command_Interface::write_tx_buf(MCP2521_TX_BUFFER buffer, MCP2521_BUFFER_TYPE type, uint8_t *data, size_t length) {
+    uint8_t address = buffer | (type << 2);
+    hardware_handle->write(MCP2521_OP_LOAD_TX_BUFFER | address, data, length);
+}
+
+void MCP2521_Command_Interface::request_to_send(bool txb2, bool txb1, bool txb0) {
+    uint8_t data = (txb2 << 2) | (txb1 << 1) | txb0;
+    hardware_handle->execute(MCP2521_OP_RTS | data);
+}
+
+void MCP2521_Command_Interface::request_to_send(MCP2521_TX_BUFFER buffer) {
+    uint8_t mask = 0;
+
+    switch (buffer) {
+        case MCP2521_TX_BUFFER::TXB0:
+            mask = 0b001;
+            break;
+        case MCP2521_TX_BUFFER::TXB1:
+            mask = 0b010;
+            break;
+        case MCP2521_TX_BUFFER::TXB2:
+            mask = 0b100;
+            break;
+    }
+
+    hardware_handle->execute(MCP2521_OP_RTS | mask);
+}
+
+uint8_t MCP2521_Command_Interface::read_status() {
+    return hardware_handle->read(MCP2521_OP_READ_STATUS);
+}
+
+uint8_t MCP2521_Command_Interface::read_rx_status() {
+    return hardware_handle->read(MCP2521_OP_RX_STATUS);
+}
+
+void MCP2521_Command_Interface::bit_modify(uint8_t address, uint8_t mask, uint8_t data) {
+    uint8_t data_array[3] = {address, mask, data};
+    hardware_handle->write(MCP2521_OP_BIT_MODIFY, data_array, 3);
+}

can-interface/components/mcp2521_hardware_interface/CMakeLists.txt

@@ -0,0 +1,4 @@
+idf_component_register(SRCS "esp_implementation_init.cpp"
+                            "esp_implementation_cmd.cpp"
+                       INCLUDE_DIRS "include"
+                       REQUIRES driver)

can-interface/components/mcp2521_hardware_interface/esp_implementation_cmd.cpp

@@ -0,0 +1,201 @@
+#include "mcp2521_hardware_handle.hpp"
+
+#ifdef ESP_PLATFORM
+#include "mcp2521_hardware_esp.hpp"
+
+void MCP2521_Hardware_Handle_ESP::execute(uint8_t cmd) {
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = 0,
+            .length = 0,
+            .rxlength = 0,
+            .tx_buffer = NULL,
+            .rx_buffer = NULL
+        },
+        .command_bits = 8,
+        .address_bits = 0,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+}
+
+void MCP2521_Hardware_Handle_ESP::execute(uint8_t cmd, uint8_t address) {
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = address,
+            .length = 0,
+            .rxlength = 0,
+            .tx_buffer = NULL,
+            .rx_buffer = NULL
+        },
+        .command_bits = 8,
+        .address_bits = 8,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+}
+
+void MCP2521_Hardware_Handle_ESP::read(uint8_t cmd, uint8_t *data, size_t length, uint8_t address) {
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = address,
+            .length = 8*length,
+            .rxlength = 8*length,
+            .tx_buffer = NULL,
+            .rx_buffer = data
+        },
+        .command_bits = 8,
+        .address_bits = 0,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+}
+
+void MCP2521_Hardware_Handle_ESP::read(uint8_t cmd, uint8_t *data, size_t length) {
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = 0,
+            .length = 8*length,
+            .rxlength = 8*length,
+            .tx_buffer = NULL,
+            .rx_buffer = data
+        },
+        .command_bits = 8,
+        .address_bits = 0,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+}
+
+uint8_t MCP2521_Hardware_Handle_ESP::read(uint8_t cmd, uint8_t address) {
+    uint8_t result = 0;
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = address,
+            .length = 8,
+            .rxlength = 8,
+            .tx_buffer = NULL,
+            .rx_buffer = &result
+        },
+        .command_bits = 8,
+        .address_bits = 8,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+    return result;
+}
+
+uint8_t MCP2521_Hardware_Handle_ESP::read(uint8_t cmd) {
+    uint8_t result;
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = 0,
+            .length = 8,
+            .rxlength = 8,
+            .tx_buffer = NULL,
+            .rx_buffer = &result
+        },
+        .command_bits = 8,
+        .address_bits = 0,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+    return result;
+}
+
+void MCP2521_Hardware_Handle_ESP::write(uint8_t cmd, uint8_t *data, size_t length, uint8_t address) {
+    uint8_t result;
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = address,
+            .length = 8*length,
+            .rxlength = 0,
+            .tx_buffer = data,
+            .rx_buffer = NULL
+        },
+        .command_bits = 8,
+        .address_bits = 8,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+}
+
+void MCP2521_Hardware_Handle_ESP::write(uint8_t cmd, uint8_t *data, size_t length) {
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = 0,
+            .length = 8*length,
+            .rxlength = 0,
+            .tx_buffer = data,
+            .rx_buffer = NULL
+        },
+        .command_bits = 8,
+        .address_bits = 0,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+}
+
+void MCP2521_Hardware_Handle_ESP::write(uint8_t cmd, uint8_t data, uint8_t address) {
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = address,
+            .length = 8,
+            .rxlength = 0,
+            .tx_buffer = &data,
+            .rx_buffer = NULL
+        },
+        .command_bits = 8,
+        .address_bits = 8,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+}
+
+void MCP2521_Hardware_Handle_ESP::write(uint8_t cmd, uint8_t data) {
+    spi_transaction_ext_t t = {
+        .base = {
+            .flags = SPI_TRANS_VARIABLE_CMD | SPI_TRANS_VARIABLE_ADDR,
+            .cmd = cmd,
+            .addr = 0,
+            .length = 8,
+            .rxlength = 0,
+            .tx_buffer = &data,
+            .rx_buffer = NULL
+        },
+        .command_bits = 8,
+        .address_bits = 0,
+        .dummy_bits = 0,
+    };
+
+    spi_device_transmit(this->spi_device_handle, (spi_transaction_t*)(&t));
+}
+
+#endif

can-interface/components/mcp2521_hardware_interface/esp_implementation_init.cpp

@@ -0,0 +1,98 @@
+#include "mcp2521_hardware_handle.hpp"
+
+#ifdef ESP_PLATFORM
+#include "mcp2521_hardware_esp.hpp"
+#include <string.h>
+
+MCP2521_Hardware_Handle_ESP::MCP2521_Hardware_Handle_ESP(
+    spi_host_device_t spi_host,
+    spi_bus_config_t *bus_config,
+    gpio_num_t mosi, 
+    gpio_num_t miso, 
+    gpio_num_t sclk, 
+    gpio_num_t cs, 
+    gpio_num_t int_pin
+) {
+    initPins(int_pin);
+    initSPIBus(spi_host, mosi, miso, sclk, bus_config);
+    this->spi_bus_config = bus_config;
+    initSPIDevice(spi_host, cs);
+}
+
+MCP2521_Hardware_Handle_ESP::MCP2521_Hardware_Handle_ESP(
+    spi_host_device_t spi_host,
+    spi_bus_config_t *bus_config,
+    gpio_num_t cs, 
+    gpio_num_t int_pin
+) {
+    initPins(int_pin);
+    this->spi_bus_config = bus_config;
+    initSPIDevice(spi_host, cs);
+}
+
+MCP2521_Hardware_Handle_ESP::~MCP2521_Hardware_Handle_ESP() {
+
+}
+
+void MCP2521_Hardware_Handle_ESP::initPins(
+    gpio_num_t int_pin
+) {
+    gpio_config_t io_conf;
+    io_conf.intr_type = GPIO_INTR_DISABLE;
+    io_conf.mode = GPIO_MODE_INPUT;
+    io_conf.pin_bit_mask = 1 << int_pin;
+    io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
+    io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
+    gpio_config(&io_conf);
+}
+
+void MCP2521_Hardware_Handle_ESP::initSPIBus(
+    spi_host_device_t spi_host,
+    gpio_num_t mosi, 
+    gpio_num_t miso, 
+    gpio_num_t sclk, 
+    spi_bus_config_t *bus_config
+) {
+    memset(bus_config, 0, sizeof(spi_bus_config_t));
+    bus_config->mosi_io_num = mosi;
+    bus_config->miso_io_num = miso;
+    bus_config->sclk_io_num = sclk;
+
+    bus_config->quadwp_io_num = -1;
+    bus_config->quadhd_io_num = -1;
+
+    bus_config->flags = SPICOMMON_BUSFLAG_MASTER;
+    spi_bus_initialize(spi_host, bus_config, SPI_DMA_CH_AUTO);
+}
+
+void MCP2521_Hardware_Handle_ESP::initSPIDevice(
+    spi_host_device_t spi_host,
+    gpio_num_t cs
+) {
+    memset(&this->spi_device_config, 0, sizeof(spi_device_interface_config_t));
+    this->spi_device_config = {
+        .command_bits = 8,
+        .address_bits = 0,
+        .dummy_bits = 0,
+
+        .mode = 0,
+        .duty_cycle_pos = 128,
+        // cs_ena_pretrans = 0 and cs_ena_posttrans = 0 need to be set to zero, if not its not compatible with full-duplex mode
+        // Learned this the hard way
+        .cs_ena_pretrans = 0,
+        .cs_ena_posttrans = 0,
+        .clock_speed_hz = 10000,
+
+        .spics_io_num = cs,
+        .flags = SPI_DEVICE_NO_DUMMY,
+        .queue_size = 5,
+    };
+
+    spi_bus_add_device(spi_host, &this->spi_device_config, &this->spi_device_handle);
+}
+
+spi_bus_config_t * MCP2521_Hardware_Handle_ESP::getSPI_bus_config() {
+    return this->spi_bus_config;
+}
+
+#endif

can-interface/components/mcp2521_hardware_interface/include/mcp2521_hardware_esp.hpp

@@ -0,0 +1,70 @@
+#pragma once
+#include "mcp2521_hardware_handle.hpp"
+
+#ifdef ESP_PLATFORM
+
+#include "driver/gpio.h"
+#include "driver/spi_master.h"
+
+class MCP2521_Hardware_Handle_ESP : public MCP2521_Hardware_Handle {
+    char spi_tmp_buffer;
+    
+    spi_bus_config_t * spi_bus_config;
+    spi_device_interface_config_t spi_device_config;
+    spi_device_handle_t spi_device_handle;
+
+public:
+    MCP2521_Hardware_Handle_ESP(
+        spi_host_device_t spi_host,
+        spi_bus_config_t *bus_config,
+        gpio_num_t mosi, 
+        gpio_num_t miso, 
+        gpio_num_t sclk, 
+        gpio_num_t cs, 
+        gpio_num_t int_pin
+    );
+
+    MCP2521_Hardware_Handle_ESP(
+        spi_host_device_t spi_host,
+        spi_bus_config_t *bus_config,
+        gpio_num_t cs, 
+        gpio_num_t int_pin
+    );
+
+    static void initSPIBus(
+        spi_host_device_t spi_host,
+        gpio_num_t mosi, 
+        gpio_num_t miso, 
+        gpio_num_t sclk, 
+        spi_bus_config_t *bus_config
+    );
+
+    void initSPIDevice(
+        spi_host_device_t spi_host,
+        gpio_num_t cs
+    );
+
+    void initPins(
+        gpio_num_t int_pin
+    );
+
+    ~MCP2521_Hardware_Handle_ESP();
+
+    spi_bus_config_t * getSPI_bus_config();
+
+    // Inherited from MCP2521_Hardware_Handle
+    void execute(uint8_t cmd);
+    void execute(uint8_t cmd, uint8_t address);
+
+    void read(uint8_t cmd, uint8_t *data, size_t length, uint8_t address);
+    void read(uint8_t cmd, uint8_t *data, size_t length);
+    uint8_t read(uint8_t cmd, uint8_t address);
+    uint8_t read(uint8_t cmd);
+    
+    void write(uint8_t cmd, uint8_t *data, size_t length, uint8_t address);
+    void write(uint8_t cmd, uint8_t *data, size_t length);
+    void write(uint8_t cmd, uint8_t data, uint8_t address);
+    void write(uint8_t cmd, uint8_t data);
+};
+
+#endif

can-interface/components/mcp2521_hardware_interface/include/mcp2521_hardware_handle.hpp

@@ -0,0 +1,20 @@
+#pragma once
+#include <cstdint>
+#include <strings.h>
+
+class MCP2521_Hardware_Handle {
+public:
+    virtual void execute(uint8_t cmd) = 0;
+    virtual void execute(uint8_t cmd, uint8_t address) = 0;
+
+    virtual void read(uint8_t cmd, uint8_t *data, size_t length, uint8_t address) = 0;
+    virtual void read(uint8_t cmd, uint8_t *data, size_t length) = 0;
+    virtual uint8_t read(uint8_t cmd, uint8_t address) = 0;
+    virtual uint8_t read(uint8_t cmd) = 0;
+    
+    virtual void write(uint8_t cmd, uint8_t *data, size_t length, uint8_t address) = 0;
+    virtual void write(uint8_t cmd, uint8_t *data, size_t length) = 0;
+    virtual void write(uint8_t cmd, uint8_t data, uint8_t address) = 0;
+    virtual void write(uint8_t cmd, uint8_t data) = 0;
+};
+

can-interface/main/CMakeLists.txt

@@ -0,0 +1,6 @@
+idf_component_register(SRCS "hello_world_main.cpp"
+                    REQUIRES driver
+                    REQUIRES mcp2521
+                    REQUIRES mcp2521_hardware_interface
+                    REQUIRES spi_flash
+                    INCLUDE_DIRS "")

can-interface/main/can-interface.code-workspace

@@ -0,0 +1,7 @@
+{
+    "folders": [
+        {
+            "path": ".."
+        }
+    ]
+}

can-interface/main/hello_world_main.cpp

@@ -0,0 +1,86 @@
+/*
+ * SPDX-FileCopyrightText: 2010-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0-1.0
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include "sdkconfig.h"
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+#include "freertos/queue.h"
+
+#include "esp_chip_info.h"
+#include "esp_flash.h"
+#include "esp_system.h"
+
+#include "driver/gpio.h"
+#include "driver/spi_master.h"
+
+#include "mcp2521.hpp"
+
+#define SPI_PIN_CS0 GPIO_NUM_5
+#define SPI_PIN_SCLK GPIO_NUM_18
+#define SPI_PIN_MISO GPIO_NUM_19
+#define SPI_PIN_MOSI GPIO_NUM_23
+#define CAN_INT_PIN GPIO_NUM_21
+
+#define EXTERNAL_TRIGGER GPIO_NUM_26
+
+extern "C" void app_main() {
+    printf("Hello world!\n");
+
+    const gpio_num_t LED_PIN = GPIO_NUM_2;
+    gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);
+
+    gpio_set_direction(EXTERNAL_TRIGGER, GPIO_MODE_OUTPUT);
+    gpio_set_level(EXTERNAL_TRIGGER, true);
+
+    vTaskDelay(100 / portTICK_PERIOD_MS);
+    
+
+    spi_bus_config_t spi_bus;
+
+    MCP2521_Hardware_Handle_ESP hardware_mcp2521(
+        VSPI_HOST,
+        &spi_bus,
+        SPI_PIN_MOSI,
+        SPI_PIN_MISO,
+        SPI_PIN_SCLK,
+        SPI_PIN_CS0,
+        CAN_INT_PIN
+    );
+
+    MCP2521_Command_Interface mcp2521(&hardware_mcp2521);
+
+
+    gpio_set_level(EXTERNAL_TRIGGER, false);
+    printf("CANCTRL: %x\n", mcp2521.read_reg(MCP2521_CANCTRL));
+    printf("RX_STATUS: %x\n", mcp2521.read_rx_status());
+    printf("STATUS: %x\n", mcp2521.read_status());
+
+    uint8_t data[16];
+    hardware_mcp2521.read(MCP2521_OP_READ, data, 16, MCP2521_RXB0CTRL);
+
+    for(int i=0; i<0x10; i++) {
+        printf("%x ", i);
+        for(int j=0; j<8; j++) {
+            printf("%u", (data[i] >> (7-j)) & 1);
+        }
+        printf("\n");
+    }
+
+    gpio_set_level(EXTERNAL_TRIGGER, true);
+
+    bool flag = true;
+    while (true) {
+        gpio_set_level(LED_PIN, flag);
+        flag = !flag;
+
+        vTaskDelay(100 / portTICK_PERIOD_MS);
+    }
+}