implement the drv sample

SConscript

@@ -43,6 +43,9 @@ if GetDepend('PERIPHERAL_SAMPLES_USING_SERIAL_DMA'):
 if GetDepend('PERIPHERAL_SAMPLES_USING_SPI'):
     src += Glob('spi_w25q_sample.c')
 
+if GetDepend('PERIPHERAL_SAMPLES_USING_DRV'):
+    src += Glob('drv_sample.c')
+
 group = DefineGroup('peripheral-samples', src, depend = ['PKG_USING_PERIPHERAL_SAMPLES'], CPPPATH = include_path)
 
 Return('group')

drv_sample.c

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-07-23     Wangyuqiang  first version
+ */
+/*
+ * 程序清单：这是一个 模拟test字符设备驱动使用例程
+ * 例程导出了 drv_sample 命令到控制终端
+ * 命令调用格式：drv_sample
+ * 程序功能：模拟一个字符设备驱动，使开发者无需对接驱动框架即可体验RT-Thread设备驱动。
+*/
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+static rt_err_t drv_test_init(rt_device_t dev)
+{
+    rt_kprintf("Test drv init!\n");
+    return RT_EOK;
+}
+
+static rt_err_t drv_test_open(rt_device_t dev, rt_uint16_t oflag)
+{
+    rt_kprintf("Test drv open flag = %d.\n", oflag);
+    return RT_EOK;
+}
+
+static rt_err_t drv_test_close(rt_device_t dev)
+{
+    rt_kprintf("Test drv close!\n");
+    return RT_EOK;
+}
+
+static rt_ssize_t drv_test_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
+{
+    rt_kprintf("Test drv read pos = %d, size = %d.\n", pos, size);
+    return size;
+}
+
+static rt_ssize_t drv_test_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
+{
+    rt_kprintf("Test drv write pos = %d, size = %d.\n", pos, size);
+    return size;
+}
+
+static rt_err_t drv_test_control(rt_device_t dev, int cmd, void *args)
+{
+    rt_kprintf("Test drv control cmd = %d.\n", cmd);
+    return RT_EOK;
+}
+
+int rt_drv_test_init(void)
+{
+    rt_device_t test_dev = rt_device_create(RT_Device_Class_Char, 0);
+    if(!test_dev)
+    {
+        rt_kprintf("Test drv create failed!\n");
+        return -RT_ERROR;
+    }
+
+    test_dev->init    = drv_test_init;
+    test_dev->open    = drv_test_open;
+    test_dev->close   = drv_test_close;
+    test_dev->read    = drv_test_read;
+    test_dev->write   = drv_test_write;
+    test_dev->control = drv_test_control;
+
+    if(rt_device_register(test_dev, "test_drv", RT_DEVICE_FLAG_RDWR) != RT_EOK)
+    {
+        rt_kprintf("Test drv register failed!\n");
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+INIT_BOARD_EXPORT(rt_drv_test_init);
+
+static int drv_sample(void)
+{
+    rt_device_t test_dev = rt_device_find("test_drv");
+    if(test_dev == RT_NULL)
+    {
+        rt_kprintf("Can not find test drv!\n");
+        return -RT_ERROR;
+    }
+    
+    rt_device_open(test_dev, RT_DEVICE_OFLAG_RDWR);
+    rt_device_control(test_dev, RT_DEVICE_CTRL_CONFIG, RT_NULL);
+    rt_device_write(test_dev, 100, RT_NULL, 1024);
+    rt_device_read(test_dev, 20, RT_NULL, 128);
+
+    rt_device_close(test_dev);
+
+    return RT_EOK;
+}
+MSH_CMD_EXPORT(drv_sample, enable test drv sample);