[feat] add shell demo

examples/shell/main.c

@@ -0,0 +1,67 @@
+/**
+ * @file main.c
+ * @brief
+ *
+ * Copyright (c) 2021 Bouffalolab team
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+#include "hal_uart.h"
+#include "shell.h"
+
+void shell_irq_callback(struct device *dev, void *args, uint32_t size, uint32_t state)
+{
+    uint8_t data;
+    if (state == UART_EVENT_RX_FIFO) {
+        data = *(uint8_t *)args;
+        shell_handler(data);
+    }
+}
+
+int main(void)
+{
+    bflb_platform_init(0);
+    shell_init();
+    struct device *uart = device_find("debug_log");
+    if (uart) {
+        device_set_callback(uart, shell_irq_callback);
+        device_control(uart, DEVICE_CTRL_SET_INT, (void *)(UART_RX_FIFO_IT));
+    }
+
+    while (1) {
+        __asm volatile("nop");
+    }
+}
+
+void hellowd()
+{
+    MSG("hello World\r\n");
+}
+
+int echo(int argc, char *argv[])
+{
+    MSG("%dparameter(s)\r\n", argc);
+
+    for (uint8_t i = 1; i < argc; i++) {
+        MSG("%s\r\n", argv[i]);
+    }
+
+    return 0;
+}
+
+SHELL_CMD_EXPORT(hellowd, hellowd test)
+SHELL_CMD_EXPORT(echo, echo test)