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Compiler Runtime Environment
FIGURE 5-7:
INITIALIZED DATA
5.7.2.7
COPY RAM FUNCTIONS FROM PROGRAM FLASH TO DATA MEMORY
RAM functions are similar to initialized data, except that the data that exists in the
program flash represents functions instead of initial values for symbols. Similar to the
way that initialized data is copied from program flash to data memory, the linker script
must initialize three variables—one for the start address of the image in program flash,
one for the start address of the section in data memory and one for the end address of
the section in data memory. The startup code copies the memory locations from the
program flash image to the data memory using these variables. These variables are
named _ramfunc_image_begin , _ramfunc_begin , and _ramfunc_end ,
respectively.
FIGURE 5-8:
RAM FUNCTIONS
5.7.2.8
INITIALIZE BUS MATRIX REGISTERS
The bus matrix registers ( BMXDKPBA , BMXDUDBA , BMXDUPBA ) should be initialized by
the startup code if any RAM functions exist, otherwise, these registers should not be
modified. To determine whether any RAM functions exist in the application, the linker
script provides a variable that contains the length of the .ramfunc section 1 . This
1. All functions attributed with __ramfunc__ or __longramfunc__ are placed in the .ramfunc section.
? 2007 Microchip Technology Inc.
DS51686A-page 65
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相关PDF资料
SW300003-EVAL
LIBRARY SOFT MODEM-EVAL ONLY
SW300010-EVAL
SPEECH RECOG LIBRARY-EVAL ONLY
SW300040-EVAL
LIBRARY NOISE SUPPR-EVAL ONLY
SW300060-EVAL
LIBRARY ACOUSTIC ECHO-EVAL ONLY
SW300070-EVAL
SOFTWARE LIBR ENC/DEC EVAL ONLY
SW500012
HI-TECH C PRO FOR PIC32
SY87701LHI-EVAL
BOARD EVAL SY87701 EXPERIMENT
SY87729LHI-EVAL
BOARD EVAL N SY87729 EXPERIMENT
相关代理商/技术参数
SW006021-1
制造商:Microchip Technology 功能描述:MPLAB XC8 STANDARD COMPILER 制造商:Microchip Technology Inc 功能描述:COMPILER MPLAB XC8 STD 制造商:Microchip Technology Inc 功能描述:COMPILER MPLAB XC8 STANDARD 制造商:Microchip Technology Inc 功能描述:COMPILER, MPLAB XC8, STANDARD 制造商:Microchip Technology Inc 功能描述:MPLAB XC8 ANSI C Compiler for the PIC10 (12),(16),(18) (Workstation License) 制造商:Microchip Technology Inc 功能描述:MPLAB XC8 Standard Compiler 制造商:Microchip Technology Inc 功能描述:OPTOCOUPLERS; Core Architecture:PIC; Software Edition:Standard
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制造商:Microchip Technology 功能描述:MPLAB XC8 STANDARD COMPILER (F 制造商:Microchip Technology Inc 功能描述:MPLAB XC8 STANDARD COMPILER (FLOATING LICENSE) - Boxed Product (Development Kits) 制造商:Microchip Technology Inc 功能描述:COMPILER MPLAB XC8 STD FLOAT LIC 制造商:Microchip Technology Inc 功能描述:MPLAB XC8 Standard Compiler (Fltng Lic)
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制造商:Microchip Technology 功能描述:MPLAB XC8 PRO COMPILER WORKSTATION LICENSE 制造商:Microchip Technology Inc 功能描述:MPLAB XC8 PRO COMPILER - Boxed Product (Development Kits) 制造商:Microchip Technology Inc 功能描述:COMPILER MPLAB XC8 PRO 制造商:Microchip Technology Inc 功能描述:COMPILER, MPLAB XC8, PRO 制造商:Microchip Technology Inc 功能描述:MPLAB XC8 ANSI PRO Compiler for the PIC10 (12),(16),(18) (Workstation License) 制造商:Microchip Technology Inc 功能描述:MPLAB XC8 PRO Compiler 制造商:Microchip Technology Inc 功能描述:SOFTWARE TOOL, MPLAB XC8 PRO COMPILER; Core Architecture:PIC; Supported Families:PIC10, PIC16, PIC18; Software Edition:Linux; License Type:Floating - node; No. of User Licenses:1; Supported Hosts:-
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SW006021-2N
功能描述:开发软件 MPLAB XC8 PRO Compiler (Fltng Lic)
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SW006022-1
制造商:Microchip Technology 功能描述:MPLAB XC16 STANDARD COMPILER 制造商:Microchip Technology Inc 功能描述:MPLAB XC16 STANDARD COMPILER - Boxed Product (Development Kits) 制造商:Microchip Technology Inc 功能描述:COMPILER MPLAB XC16 STD 制造商:Microchip Technology Inc 功能描述:COMPILER MPLAB XC16 STANDARD 制造商:Microchip Technology Inc 功能描述:COMPILER, MPLAB XC16, STANDARD 制造商:Microchip Technology Inc 功能描述:MPLAB XC16 Standard Compiler (Workstation License) 制造商:Microchip Technology Inc 功能描述:OPTOCOUPLERS; Core Architecture:PIC, dsPIC; Software Edition:Standard
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功能描述:开发软件 MPLAB XC16 PRO Compiler
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