Created ESP-IDF for can-interface

can-interface/main/CMakeLists.txt

@@ -0,0 +1,5 @@
+idf_component_register(SRCS "hello_world_main.cpp"
+                    REQUIRES driver
+                    REQUIRES mcp2125
+                    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 +1,113 @@
+/*
+ * SPDX-FileCopyrightText: 2010-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: CC0-1.0
+ */
+
+#include <stdio.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 "mcp2125.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 EXTERNAL_TRIGGER GPIO_NUM_26
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+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);
+
+    spi_bus_config_t spi_config = {
+        .mosi_io_num = SPI_PIN_MOSI,
+        .miso_io_num = SPI_PIN_MISO,
+        .sclk_io_num = SPI_PIN_SCLK,
+        
+        .quadwp_io_num = -1,
+        .quadhd_io_num = -1,
+
+        .flags = SPICOMMON_BUSFLAG_MASTER
+    };
+
+    spi_device_interface_config_t mp2125_devcfg = {
+        .command_bits = 8,
+        .address_bits = 0,
+        .dummy_bits = 0,
+
+        .mode = 0,
+        .duty_cycle_pos = 128,
+        .cs_ena_pretrans = 1,
+        .cs_ena_posttrans = 1,
+        .clock_speed_hz = 10000,
+
+        .spics_io_num = SPI_PIN_CS0,
+        .flags = SPI_DEVICE_HALFDUPLEX,
+        .queue_size = 5,
+    };
+
+    spi_device_handle_t mp2125_handle;
+
+    spi_bus_initialize(VSPI_HOST, &spi_config, SPI_DMA_CH_AUTO);
+    spi_bus_add_device(VSPI_HOST, &mp2125_devcfg, &mp2125_handle);
+
+    char rxBuffer[32] = {0};
+
+    spi_transaction_t transaction0 = { // RESET
+        .cmd = 0b11000000,
+        .length = 0,
+        .rxlength = 2 * 8,
+        .tx_buffer = NULL,
+        .rx_buffer = rxBuffer
+    };
+
+    spi_transaction_t transaction1 = { // READ STAT/S
+        .cmd = 0b10110000,
+        .length = 0,
+        .rxlength = 2 * 8,
+        .tx_buffer = NULL,
+        .rx_buffer = rxBuffer
+    };
+
+
+    vTaskDelay(100 / portTICK_PERIOD_MS);
+    gpio_set_level(EXTERNAL_TRIGGER, false);
+    spi_device_transmit(mp2125_handle, &transaction0);
+    spi_device_transmit(mp2125_handle, &transaction1);
+    gpio_set_level(EXTERNAL_TRIGGER, true);
+
+    bool flag = true;
+    while (true) {
+        gpio_set_level(LED_PIN, flag);
+        flag = dummy_function(flag);
+
+        vTaskDelay(100 / portTICK_PERIOD_MS);
+    }    
+}
+
+#ifdef __cplusplus
+}
+#endif