codewarrior使用指南(freescale 官方培训版).pdf

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Transition Title

内容

创建新工程 1

创建新工程 2

创建新工程 3

创建新工程 4

创建新工程 5

参考文献

在新项目中加入或删除文件

无限循环

编译器优化

编译器优化 – 强度减弱

编译器优化 –死代码消除

编译器优化–消除死赋值

Codewarrior HC08 Compiler Options Settings

编译器优化 –循环解开

示例（没有循环解开）:

示例（有循环解开）:

更多的优化选项:

更多的优化选项: :

条件编译

模拟调试器界面

模拟调试器: 特点

模拟调试器: 界面

启动程序

代码放在哪里?

如何对IO进行操作?

访问固定内存位置

访问CPU寄存器

方法1：利用关键字 ‘interrupt’:

方法2：在PRM文件中声明

方法3：在向量表中初始化

如何使用汇编和C语言混合编程

在C中访问汇编变量

在汇编中访问C变量

在C中调用汇编函数

在汇编中调用C函数

嵌入式编程 vs. PC编程

数据类型

HC08的数据类型

默认CodeWarrior 的数据类型

数据类型选择

修饰符

静态变量

静态变量示例

静态函数

Volatile变量

volatile的变量从不会被编译器优化

Volatile 变量示例

Const 变量

Const修饰符

Const volatile 变量

栈指针与函数参数

堆栈指针寻址

堆栈帧

函数指针

定义指向函数的指针

Example:

HC08QL 示例

Debug (1):

Debug(2):

Debug(3)

When to use pointers:

Processor Expert处理器专家

开发人员面临的挑战

嵌入式应用系统设计

嵌入式应用系统设计 (2)

项目开发的主要难点

项目开发的主要难点(2)

怎样迎接挑战

阅读上百页的资料

问题和风险

开发过程中遇到的困难

开发过程中遇到的问题 (2)

正确迎接挑战

Processor Expert处理器专家

比如: CPU

比如：通用 I/O

比如: A/D converter

Processor Expert “内嵌式Beans”

优点

Processor Expert 处理器专家将会提供更多功能

1st Scenario

Double click on the BitIO bean in the Bean Selector in order to add the bean to the project

Enter name of the Bean in the Bean Inspector window - RedLED

Select pin for the RedLED in the Bean Inspector window - PTB0_ATD0

Select Pin Direction in the Bean Inspector window - Output

Click on the TAB Methods in the Bean Inspector window - in order to set generated methods

Set all methods "don't generate" instead of the NegVal method - set the method "generate code"

Double click on the BitIO bean in the Bean Selector in order to add the second bean

Click on the "Properties" TAB in the Bean Inspector window in order to set the bean

Enter name of the Bean in the Bean Inspector window - GreenLED

Select pin for the GreenLED in the Bean Inspector window - PTB1_ATD1

Select Pin Direction in the Bean Inspector window - Output

Click on the TAB Methods in the Bean Inspector window - in order to set generated methods

Set all methods "don't generate" instead of the NegVal method - set the method "generate code"

Double click on the "ExtInt" bean in the Bean Selector in order to add the 3rd bean to the project

Click on the "Properties" TAB in the Bean Inspector window in order to set the bean

Enter name of the Bean in the Bean Inspector window - Button

Select pin for the Button in the Bean Inspector window - PTG0_KBD0

Select item "Generate interrupt on" to the "falling edge" in the Bean Inspector window

Click on the TAB Methods in the Bean Inspector window - in order to set generated methods

Set the following methods "generate code": Enable, Disable - other set to "don't generate"

Click in the "Code Design LED.mcp" command in the Processor Expert menu

Code design process...

Double click on the "OnInterrupt" item in the folder "Beans|Button: ExtInt"

Find the place "Button_OnInterrupt" for entering the code

Enter the code to invert the two LEDs: RedLED_NegVal(); GreenLED_NegVal();

The user modules can be found in the folder "User Modules" in the Project panel window.

Click on the button "Make" in the project panel in order to compile the project

The project building process

Check the window if the process was successful

Click on the button “Debug" in the project panel in order to start the debugger

The external debugger is started now. It is configured to load the P&E Full Chip Simulator.Click on the button “Debug" to sta

Program execution stopped because inputs on port B are undefined

Open the “Simulated Port Inputs” Dialog and define values at port B

Run the program again – now it will continue running

Click on the “Halt’ button to stop the program

Open with the right mouse button the menu, choose “Open Source File…” and select “Events.C”

Scroll the Source windows to the function “Button_OnInterrupt” and set a breakpoint -> click with the right mouse button o

The statement is now marked with the breakpoint symbolRun the program again

Enter these commands in the Command window to stimulate input on port G:inputg 1 // puts a high signal on PTG0_KBD0input

This caused an interrupt that than hits the breakpointThe output port are visible in the Memory window

Close and restart debugger - This will restart a new debug session.Create a new Visualization Component

Add a “LED” instrument:Click with the right mouse button in the Visualizationtool and select from the popup menu the “Add New

Drag the new LED instrument into the visible area of the windowClick with the right mouse button on the instrument to open th

Change the properties accordingly (change the view and map to the correct I/O port and bit)

Copy (Cut & Paste) the LED instrument and update the properties of the new LED instrumant accordingly

Click with the left mouse button beside the LEDs into the Visualizationtool windows to get the properties of the tool and sele

When toggling the port G as previously, both LED will show the state graphicallyAdd an additional “Command” instrument to sti

Change the properties accordingly.The Command field specifies to run the command file “toggleG.cmd”.

Switch back focus on the COdeWarrior IDECreate the new file “ToggleG.cmd”

Add the commands to the file:inputg 1inputg 0

Add the file “toggleG.cmd” to the current build target:From the “Project” menu choose “Add toggleG.cmd to Project…Select the

Switch focus back to the debuggerClick the right button to get the menu and switch off “Edit Mode” of the Visualizationtool

Clicking on the “Toggle G” button will now generate an interrupt that toggles the LEDs

Save this configuration for later use in future sessions:Select “Save Configuration” from the “File” menu

Transition Title Codewarrior 使用指南 TM

内容 • 利用向导创建一个新工程项目 • 在新项目中加入或删除文件 • 编译 • 调试 • 启动程序 • PRM文件设置 • 如何对IO及寄存器进行操作 • 如何写中断程序 • 如何使用汇编和C语言混合编程 • 嵌入式编程注意事项 • 如何使用Processor Expert TM Slide 2 Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.

• 利用向导创建一个新工程项目 • 在新项目中加入或删除文件 • 编译 • 调试 •启动程序 • PRM文件设置 • 如何对IO及寄存器进行操作 • 如何写中断程序 • 如何使用汇编和C语言混合编程 •嵌入式编程注意事项 • 如何使用Processor Expert Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005. TM

创建新工程 1 1、创建新工程 2、选择HCS12 New Project Wizard 3、输入工程名 TM Slide 4 Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.

4、选择MCU类型 5、选择语言类型创建新工程 2 TM Slide 5 Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.

6、选择是否采用Processor Expert 7、选择是否使用PC-lint 创建新工程 3 如果用Processor Expert，选择 Yes TM Slide 6 Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.

8、选择是否用浮点运算 9、选择存储器类型创建新工程 4 TM Slide 7 Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.

10、选择调试器类型创建新工程 5 TM Slide 8 Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2005.

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