Freescale Semiconductor 802.15.4 5.3.3 Crt0.c and Crt.h

5-4 Embedded Bootloader Reference Manual, Rev 0.0 Freescale Semiconductor

NOTE

This file can also be used with the MC908HCS08GT60 MCU.

5.3.3 Crt0.c and Crt.h

These files contain the basic initialization code (basic system clock, memory and stack setup). The normal

basic init file(s) (like the start08.c from Metrowerks) is not needed when the Embedded Bootloader is

embedded.

In an 802.15.4/Zigbee application with Embedded Bootloader, these files only contain the _startupdata

structure. The Embedded Bootloader handles all the basic initialization (memory and stack setup) of the

application. That is, the application’s main() function will be the first item called (entry point).

NOTE

Do not include basic initialization (memory and stack setup) when

building an application with the Embedded Bootloader. Place any

necessary initialization function calls in the main() function. Whatever,

the initialization function or only the _startupdata structure is included is

controlled by compiler #defines. See Section 5.2.1, Compiler Defines

Application for more information.

Contents

Main 802.15.4/Zigbee Embedded Bootloader Reference Manual Page Contents Page Page About This Book Audience Organization Conventions Definitions, Acronyms, and Abbreviations References Revision History Chapter 1 Embedded Bootloader Description 1.1 Target 1.1.1 Ported Targets 1.2 Features 1.3 Benefits 1.4 Potential Issues 1.4.1 Optional Firmware Upload Settings Chapter 2 Using the Embedded Bootloader 2.1 Upload Firmware 2.1.1 Use Case One 2.1.2 Use Case Two 2.1.3 Safe Mode Boot 2.2 Updating Non-volatile Memory (NVM) 2.2.1 An Example of How to Change the MAC Address 2.3 System Bus Frequency 2.4 UART Baud Rate Chapter 3 Test Tool Zigbee Flash Tool 3.1 Graphical User Interface (GUI) Version 3.1.1 Using the Tools Menu Option 3.1.2 Using the View Menu Option 3.1.3 Selecting the Firmware File to Upload Page 3.1.4 Using the Help Menu 3.1.5 Changing the NVM Data in Flash or File Page Page 3.2.1 Normal Use Example (Default) 3.2.2 Flash Erase Disabled Example Page Chapter 4 Embedded Bootloader Programming 4.1 Programming To An Empty (Erased) Board Page Page Page 4.2 Upgrading The Embedded Bootloader Page Page Page Page Page Chapter 5 Application Integration Reference Guide 5.1 Product Deliverables 5.1.1 Embedded Bootloader Image 5.1.2 Application Support Files 5.1.3 Application Linker File 5.2 Application 5.2.1 Compiler Defines 5.2.2 Unreferenced Symbols 5.2.3 System Clock Setup 5.3 Application Support Files 5.3.1 DigiType.h 5.3.2 Gb60_io.h 5.3.3 Crt0.c and Crt.h 5.3.4 Embedded_Bootloader.h and Embedded_Bootloader.c 5.3.5 NV_Data.c and NV_Data.h 5.3.6 ISR_Vectors.c Page Chapter 6 Port Integration Reference Guide 6.1 Embedded Bootloader Build Environment 6.1.1 HCS08 Compiler 6.1.2 HCS08 Linker 6.1.3 HCS08 LibMaker 6.2 Product Deliverables 6.2.1 Embedded_Bootloader.mcp 6.2.2 HCS08_Flash_Lib.Lib 6.2.3 Embedded_Bootloader_Functionality_Lib.Lib 6.2.4 Source Files 6.3 Porting to a Specific Target 6.3.1 Code and Data Segments 6.3.2 Standard Libraries 6.3.3 Compiler #defines 6.4 Source Files 6.4.1 Target.h 6.4.2 Reset_Vector.c 6.4.3 Embedded_Bootloader_Target.h 6.4.4 HW_Init.h 6.4.5 HW_Init.c 6.4.6 main.c Chapter 7 Embedded Bootloader Public Function Description 7.1 802.15.4/Zigbee Application Accessible Functions 7.1.1 Enable_Download_Firmware Page 7.1.2 Hard_Reset 7.1.3 Update_NV_RAM 7.1.4 NV_Flash_Setup 7.1.5 FL_ICG_Setup 7.1.6 UART_Port_Select Page Chapter 8 Embedded Bootloader Memory Map Page Page Page Page Page Page Page Appendix A Release Folder and File Structure A.1. Folder Structure A.2. File Structure