modify drvmodel.md
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Yan_yan
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@ -14,8 +14,9 @@
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xs_Device 结构体同样采用类似面向对象的方法，它集合了所有设备的共有特征，为设备的基类。平台上接入的具体设备以它为基类进行派生，如 IICHardwareDevice 、USBHardwareDevice 、SPIHardwareDevice 、CANHardwareDevice等。从而为众多不同性质的设备实现统一的管理架构。
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## 关键数据结构
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## struct xs_Bus结构
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* struct xs_Bus结构
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```c
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struct xs_Bus {
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char Bus_name[XS_NAME_MAX]; /* name of bus */
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@ -49,7 +50,7 @@ enum xs_BusType {
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xs_BusType成员表示不同的总线类型，其具体定义在上文给出。
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### enum Bus_priority枚举结构
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* enum Bus_priority枚举结构
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```c
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enum Bus_priority{
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PriorityLevelOne = 1,
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@ -64,7 +65,7 @@ enum Bus_priority{
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Bus_priority变量表示总线优先级，数值越低优先级越高
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### struct xs_IIC_bus结构
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* struct xs_IIC_bus结构
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```c
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struct xs_I2CBus {
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struct xs_Bus bus; /* Basic properties of the bus */
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@ -73,7 +74,7 @@ struct xs_I2CBus {
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```
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speed成员记录I2C总线与传感器设备通信的速率
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### struct xs_SPIBus结构
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* struct xs_SPIBus结构
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```c
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struct xs_SPIBus {
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struct xs_Bus bus; /* Basic properties of the bus */
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@ -84,7 +85,7 @@ struct xs_SPIBus {
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```
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CPHA成员记录SPI总线的时钟相位，CPOL成员记录SPI总线的时钟极性
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### struct xs_CANBus结构
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* struct xs_CANBus结构
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```c
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struct xs_CAN_bus {
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struct xs_Bus bus; /* Basic properties of the bus */
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@ -93,7 +94,7 @@ struct xs_CAN_bus {
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};
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```
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### struct xs_USBBus结构
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* struct xs_USBBus结构
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```c
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struct xs_USB_bus {
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struct xs_Bus bus; /* Basic properties of the bus */
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@ -103,7 +104,7 @@ struct xs_USB_bus {
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```
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## struct xs_Device结构
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* struct xs_Device结构
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```c
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typedef struct xs_Device {
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char dev_name[XS_NAME_MAX]; /* name of device */
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@ -122,7 +123,7 @@ typedef struct xs_Device * xs_DevicePointer ;
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### struct device_ops结构
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* struct device_ops结构
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```c
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struct device_ops{
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int (*init)(struct xs_Device * dev);
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@ -135,9 +136,9 @@ typedef struct xs_Device * xs_DevicePointer ;
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```
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device_ops包含统一的、类似文件系统的API，用于对具体外设进行实际的数据读写。如在使用一个传感器前后需要打开（open）/关闭（close）该传感器，read、write分别用与从传感器接收数据与向传感器发送数据，ioctl用于配置传感器属性（如波特率）
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### struct xs_HardwareDev结构
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* struct xs_HardwareDev结构
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```c
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struct xs_HardwareDev{
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struct xs_Device dev;
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struct device_ops ops;
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@ -146,11 +147,10 @@ struct xs_HardwareDev{
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void (*shutdown)(struct xs_Device * dev);
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int (*suspend)(struct xs_Device * dev, int state);
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int (*resume)(struct xs_Device * dev);
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};
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```
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## struct IICHardwareDevice结构
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* struct IICHardwareDevice结构
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```c
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struct IICHardwareDevice{
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struct xs_HardwareDev hardware;
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@ -159,7 +159,7 @@ struct xs_HardwareDev{
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}
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```
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### struct SPIHardwareDevice结构
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* struct SPIHardwareDevice结构
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```c
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struct SPIHardwareDevice{
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struct xs_HardwareDev hardware;
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@ -168,7 +168,7 @@ struct xs_HardwareDev{
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}
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```
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### struct CANHardwareDevice结构
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* struct CANHardwareDevice结构
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```c
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struct CANHardwareDevice{
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struct xs_HardwareDev hardware;
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@ -177,7 +177,7 @@ struct xs_HardwareDev{
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}
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```
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### struct USBHardwareDevice结构
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* struct USBHardwareDevice结构
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```c
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struct USBHardwareDevice{
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struct xs_HardwareDev hardware;
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@ -187,10 +187,9 @@ struct xs_HardwareDev{
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```
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## struct xs_DeviceDriver结构
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* struct xs_DeviceDriver结构
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```c
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struct xs_DeviceDriver{
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char driver_name[XS_NAME_MAX];
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struct bus_type * bus;
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enum driver_state falg;
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@ -204,13 +203,14 @@ struct xs_DeviceDriver{
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struct xs_DeviceDriver * next;
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void * data;
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};
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}Device_driver_head;
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} Device_driver_head;
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```
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## 使用场景
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在获取i2c数据前，需要匹配设备驱动，设备驱动打开后对设备进行读写，使用完毕后，须关闭设备驱动。完整的使用过程示例如下：
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在获取i2c数据前，要匹配设备驱动，在设备驱动打开后对设备进行读写。使用完毕后，关闭设备驱动。
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完整的使用过程示例如下：
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```c
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int main(int argc, char *argv[])
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{
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@ -219,9 +219,9 @@ int main(int argc, char *argv[])
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/* find the i2c device instance */
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dev = (struct xs_I2cDevice*)xs_DeviceFind("i2c_temp",XS_IIC_BUS); //获取设备句柄
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if(dev==NULL)
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if(dev == NULL)
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{
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xs_kprintf("find iic device error\n")
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xs_kprintf("find iic device error\n");
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}
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/* open the device instance */
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@ -74,7 +74,7 @@ struct xs_Timer
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xs_tick_x origin_timeslice; ///< 超时时间
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xs_tick_x deadline_timeslice; ///< 截止时间
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XS_DOUBLE_LINKLIST link; ///< 管理链表
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XS_DOUBLE_LINKLIST levels[XS_TIMER_SKIP_LIST_LEVEL]; ///< 查询链表
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XS_DOUBLE_LINKLIST Sortlist; ///< 查询链表
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};
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typedef struct xs_Timer *xs_timer_x;
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```
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