ITE_EC_C_Code_Program_Guide.pdf-资料库

Firmware Programing Guide ITE Embedded Controller Firmware Programing Guide ITE TECH. INC. www.ite.com.tw

Firmware Programing Guide Copyright  2009 ITE Tech. Inc. All specifications are subject to change without notice. The material contained in this document supersedes all previous documentation issued for the related products included herein. Please contact ITE Tech. Inc. for the latest document(s). All sales are subject to ITE’s Standard Terms and Conditions, a copy of which is included in the back of this document. All other trademarks are claimed by their respective owners. All specifications are subject to change without notice. Additional copies of this manual or other ITE literature may be obtained from: If you have any marketing or sales questions, please contact: ITE Tech. Inc. Marketing Department 7F, No. 233-1, Baociao Rd., Sindian City, Taipei County 23145, Taiwan, R.O.C. (02) 29126889 (02) 2910-2551, 2910-2552 Phone: Fax: P.Y. Chang, at ITE Taiwan: E-mail: p.y.chang@ite.com.tw, Tel: 886-2-29126889 X6052, Fax: 886-2-29102551 http://www.ite.com.tw To find out more about ITE, visit our World Wide Web at: Or e-mail itesupport@ite.com.tw for more product information/services www.ite.com.tw 1

Data 04/09/2012 Firmware Programing Guide Version History Version 1.0 Description First release www.ite.com.tw 2

Firmware Programing Guide CONTENTS 1. Introduction ............................................................................................................. 4 1.1 General Description .............................................................................................................. 4 2. Compiler Environment ........................................................................................... 5 Source Code Folder Definition ............................................................................................. 5 Source Code Folder Architecture of Command Line Version ........................................... 5 Source Code Folder Architecture of IDE Version ............................................................... 6 Generating a Bin File of Command Line Version ............................................................... 6 Generating a Bin File of IDE Version ................................................................................... 7 Creating a New C Source File of Command Line Version ................................................. 8 Creating a New C Source File of IDE Version ..................................................................... 9 3. EC Memory Space ................................................................................................. 10 4. Firmware Architecture .......................................................................................... 12 The Start of EC firmware ..................................................................................................... 13 The Main Function of EC Firmware ................................................................................... 14 Interrupt Service Routine .................................................................................................... 17 LPC I/O 60h/64h Interface ................................................................................................... 23 LPC I/O 62h/66h Interface ................................................................................................... 29 PS2 Interface ........................................................................................................................ 32 Internal Keyboard Scanner ................................................................................................. 36 SMBus Interface .................................................................................................................. 43 SPI Read/Write Interface ..................................................................................................... 47 5. Debugging Interface ............................................................................................. 48 KBS Download Board ......................................................................................................... 48 Serial Port of 8032 ............................................................................................................... 51 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 2.1 2.2 2.3 2.4 2.5 2.6 2.7 5.1 5.2 www.ite.com.tw 3

1. Introduction 1.1 General Description Firmware Programing Guide The ITE Embedded Controller (EC) is a highly integrated controller which is suitable for mobile system applications. It’s embedded with the 8032 microcontroller which can execute the EC firmware (EC code) to dynamically program interfaces and general purpose input/output. The following figure shows the block diagram of the EC: When the EC is powered on, the 8032 microcontroller will fetch the EC firmware at the physical address 0x0000 of the SPI Flash ROM. The most frequently used features are implemented in the EC Codebase as the kernel code which contains keyboard scanning, PS/2 data collection, host interface 64/60 port commands, and the SMBus API functions. The applications of EC can be shown as the following example: www.ite.com.tw 4

Firmware Programing Guide 2. Compiler Environment The Keil C components (C51, A51, and BL51) are requested for generating bin file of EC firmware. Please make sure Keil C is properly installed and containing at least these components before generating bin file. Other necessary firmware utilities are included in the source code. 2.1 Source Code Folder Definition The IDE environment and command line environment are supported for generating EC firmware bin file. In Figure 2-1-1, folder “DOS_Example” and “DOS_Pure” are command line versions. Folder “uVision_Example” and “uVision_Pure” are IDE versions. Figure 2-1-1 In Figure 2-1-2, all versions have the same contents in “CHIP” and “CORE” of “Code” folder. “DOS_Example” and “uVision_Example” have the same contents of “OEM” of “Code” and including more example functions for reference. “DOS_Pure” and “uVision_Pure” have the same contents of “OEM” of “Code”. Pure version is suggested, you are free to add OEM function. Figure 2-1-2 2.2 Source Code Folder Architecture of Command Line Version Figure 2-2-1 is folder architecture of command line version. The “Code” folder includes definition of chip registers, kernel code and OEM code. Most of the time, programmer don’t have to modify the contents of kernel code. The “KeilMisc” folder includes LST, OBJ, and MAP files. Programmer can always refer to these folders when necessary. If compiling and linking can be completed, programmer can find out the bin file of EC firmware in “ROM” folder. The “Tools” folder includes “FU.EXE”, “Hex2bin.exe” and “NMake” folder. “FU.EXE” is firmware utility for adjusting bin file. “Hex2bin.exe” is hex to binary file converter utility. The use of NMake here is deciding which *.C file need to re-compile and linking. Please visit the Microsoft Website for more use. www.ite.com.tw 5

Firmware Programing Guide Figure 2-2-1 2.3 Source Code Folder Architecture of IDE Version The folder architecture of IDE version is very similar to command line version. The difference is that IDE version has uVision folder for project setting and linker control file shown in Figure 2-3-1. Figure 2-3-1 2.4 Generating a Bin File of Command Line Version First of all, please modify build.bat if necessary. Only two item need to be modified, shown in Figure 2-4-1. The Item [A] is final size (KB) of EC binary file. In most case, setting “64” is enough. The item [B] is installation path of Keil C. Please make changes according to installation path. Figure 2-4-1 www.ite.com.tw 6

Firmware Programing Guide Next, copying a OEM code in “OEM” folder, shown in Figure 2-4-2. “xxx” can be the project name or others. All of OEM code refer to the same kernel code and chip register definition. Figure 2-4-2 Then, set directory path of build.bat in the command prompt, shown in Figure 2-4-3. Finally, typing “build xxx” in command prompt. EC firmware binary file “xxx.bin” will be in “ROM” folder if all setting is correct. Please type “build” in command prompt to get more use. Figure 2-4-3 2.5 Generating a Bin File of IDE Version We provide a project setting of Keil C in “uVision” folder. Actually, just open the project and pressing build button, as shown in Figure 2-5-1. EC firmware binary file will be in “ROM” folder. Programmer can modify “MakeUp.bat” for EC firmware code size. We use linker control file (“uITEEC.lin” of “Link” folder) for linker control setting. Please visit the Keil Website for more use. Figure 2-5-1 www.ite.com.tw 7

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