day4

Day4/README.md

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+
+
+### I/O框架
+显示屏、串口通信、flash、SD卡、以太网接口
+图
+open,close...
+### 派生设备种类
+![alt text](image.png)
+### 字符设备、块设备
+#### 字符设备
+顺序读取：键盘、串口
+#### 块设备
+随机读取：硬盘、SD卡、NAND FLASH
+### 为什么分类设备
+一类的控制相同
+### 例子
+RT_D
+
+## 
+### 创建销毁设备
+### 注册销毁
+### flags
+分行？
+### 实验1：注册
+
+### 访问
+### 查找、初始化
+### 打开、关闭
+### 打开标志位
+### 控制设备
+### 读写设备
+### 回调
+### 调用关系图
+
+IO设备管理层
+PIN设备驱动框架层
+PIN设备驱动层
+
+## GPIO
+引脚：电源、时钟、控制、I/O
+GPIO,功能复用I/O
+可编程控制中断
+![alt text](image-1.png)
+rt_pin_mode()
+rt_pin_write()
+rt_pin_read()
+
+![alt text](image-2.png)
+
+### 外部中断
+
+## I2C总线

Day4/SConscript

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+from building import *
+import os
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c')
+
+CPPPATH = [cwd]
+
+if GetDepend(['PKG_USING_RTDUINO']) and not GetDepend(['RTDUINO_NO_SETUP_LOOP']):
+    src += ['arduino_main.cpp']
+
+group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)
+
+list = os.listdir(cwd)
+for item in list:
+    if os.path.isfile(os.path.join(cwd, item, 'SConscript')):
+        group = group + SConscript(os.path.join(item, 'SConscript'))
+
+Return('group')

Day4/pin_irq_example.c

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+#include <drv_gpio.h>
+#include <rtdevice.h>
+#include <rtthread.h>
+#define LOG_TAG "pin.irq"
+#define LOG_LVL LOG_LVL_DBG
+#include <ulog.h>
+
+#define KEY_UP GET_PIN(C, 5)
+#define KEY_DOWN GET_PIN(C, 1)
+#define KEY_LEFT GET_PIN(C, 0)
+#define KEY_RIGHT GET_PIN(C, 4)
+
+void key_up_callback(void *args) 
+{ 
+    int value = rt_pin_read(KEY_UP);
+    LOG_I("key up value: %d\n", value);
+}
+
+void key_down_callback(void *args) 
+{ 
+    int value = rt_pin_read(KEY_DOWN);
+    LOG_I("key down value: %d\n", value);
+}
+
+void key_left_callback(void *args) 
+{ 
+    int value = rt_pin_read(KEY_LEFT);
+    LOG_I("key left value: %d\n", value);
+}
+
+void key_right_callback(void *args) 
+{ 
+    int value = rt_pin_read(KEY_RIGHT);
+    LOG_I("key right value: %d\n", value);
+}
+
+static int rt_pin_irq_example(void)
+{
+    rt_pin_mode(KEY_UP, PIN_MODE_INPUT_PULLUP);
+    rt_pin_mode(KEY_DOWN, PIN_MODE_INPUT_PULLUP);
+    rt_pin_mode(KEY_LEFT, PIN_MODE_INPUT_PULLUP);
+    rt_pin_mode(KEY_RIGHT, PIN_MODE_INPUT_PULLUP);
+
+    rt_pin_attach_irq(KEY_UP, PIN_IRQ_MODE_FALLING, key_up_callback, RT_NULL);
+    rt_pin_attach_irq(KEY_DOWN, PIN_IRQ_MODE_FALLING, key_down_callback, RT_NULL);
+    rt_pin_attach_irq(KEY_LEFT, PIN_IRQ_MODE_FALLING, key_left_callback, RT_NULL);
+    rt_pin_attach_irq(KEY_RIGHT, PIN_IRQ_MODE_FALLING, key_right_callback, RT_NULL);
+
+    rt_pin_irq_enable(KEY_UP,PIN_IRQ_ENABLE);
+    rt_pin_irq_enable(KEY_DOWN,PIN_IRQ_ENABLE);
+    rt_pin_irq_enable(KEY_LEFT,PIN_IRQ_ENABLE);
+    rt_pin_irq_enable(KEY_RIGHT,PIN_IRQ_ENABLE);
+    
+    return RT_EOK;
+}
+MSH_CMD_EXPORT_ALIAS(rt_pin_irq_example,irq, pin_irq_example);

Day4/test_drv_example.c

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+#include <rtthread.h>
+#include <rtdevice.h>
+
+static int rt_device_test_init(void)
+{
+    rt_device_t test_dev = rt_device_create(RT_Device_Class_Char,0);
+    if(!test_dev)
+    {
+        rt_kprintf("test_dev create failed\n");
+        return -RT_ERROR;
+    }
+    if(rt_device_register(test_dev,"test_dev",RT_DEVICE_FLAG_RDWR)!=RT_EOK)
+    {
+        rt_kprintf("test_dev register failed\n");
+    }
+    return RT_EOK;
+}
+MSH_CMD_EXPORT_ALIAS(rt_device_test_init,devtest, test device init);