Размещение функции в RAM, LPC2000, Keil Опции

[toweroff]

Попробовал разместить критичные, с точки зрения времени выполнения, функции в RAM. До этого не пользовался, но сравнения для )
Keil 4.11, использовал следующие комбинации для кода и скаттера:

1.
Код

Код

#pragma arm section code = "ramfunc"
тело
#pragma arm section code

scatter

Код

LR_IROM1 0x00000000  0x00080000 {  ; load region size_region
  ER_IROM1 0x00000000
  {; load address = execution address
   STARTUP.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
}
  RW_IRAM1 0x40000000 0x00010000  {; RW data
   *(ramfunc)
   .ANY (+RW +ZI)
  }
}

2.
По совету, найденному в примерах Keil, добавил для всего С-файла в свойствах "Memory Assignment->Code/Const->IRAM1(0x40000000-0x4000FFFF)" и собрал все со сгенеренным scatter'ом

Код - убрал прагмы

scatter

Код

LR_IROM1 0x00000000 0x00080000  {   ; load region size_region
  ER_IROM1 0x00000000 0x00080000  { ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }
  RW_IRAM1 0x40000000 0x00010000  { ; RW data
    mscuser.o (+RO)
   .ANY (+RW +ZI)
  }
}

Итого

Размер используемой RAM при компиляции не изменяется никак.
Так должно быть (с объемом), или я что-то сделал не так и компилятор с линкером мне должны сказать (хотя бы по количеству), что RAM пользуется больше?

[alt3857]

Код

;/*****************************************************************************
; * @file:    startup_LPC17xx.s
; * @purpose: CMSIS Cortex-M3 Core Device Startup File
; *           for the NXP LPC17xx Device Series
; * @version: V1.0
; * @date:    25. Nov. 2008
; *------- <<< Use Configuration Wizard in Context Menu >>> ------------------
; *
; * Copyright (C) 2008 ARM Limited. All rights reserved.
; * ARM Limited (ARM) is supplying this software for use with Cortex-M3
; * processor based microcontrollers.  This file can be freely distributed
; * within development tools that are supporting such ARM based processors.
; *
; * THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
; * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
; * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
; * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
; * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
; *
; *****************************************************************************/


; <h> Stack Configuration
;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>

Stack_Size      EQU     0x00000200

                AREA    STACK, NOINIT, READWRITE, ALIGN=3
Stack_Mem       SPACE   Stack_Size
__initial_sp


; <h> Heap Configuration
;   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
; </h>

Heap_Size       EQU     0x00000000

                AREA    HEAP, NOINIT, READWRITE, ALIGN=3
__heap_base
Heap_Mem        SPACE   Heap_Size
__heap_limit


                PRESERVE8
                THUMB


; Vector Table Mapped to Address 0 at Reset

                AREA    RESET, DATA, READONLY
                EXPORT  __Vectors

__Vectors       DCD     __initial_sp             ; Top of Stack
                DCD     Reset_Handler            ; Reset Handler
                DCD     NMI_Handler              ; NMI Handler
                DCD     HardFault_Handler        ; Hard Fault Handler
                DCD     MemManage_Handler        ; MPU Fault Handler
                DCD     BusFault_Handler         ; Bus Fault Handler
                DCD     UsageFault_Handler       ; Usage Fault Handler
                DCD     0                        ; Reserved
                DCD     0                        ; Reserved
                DCD     0                        ; Reserved
                DCD     0                        ; Reserved
                DCD     SVC_Handler              ; SVCall Handler
                DCD     DebugMon_Handler         ; Debug Monitor Handler
                DCD     0                        ; Reserved
                DCD     PendSV_Handler           ; PendSV Handler
                DCD     SysTick_Handler          ; SysTick Handler

               ; External Interrupts
                DCD     WDT_IRQHandler           ; 16: Watchdog Timer
                DCD     TIMER0_IRQHandler        ; 17: Timer0
                DCD     TIMER1_IRQHandler        ; 18: Timer1
                DCD     TIMER2_IRQHandler        ; 19: Timer2
                DCD     TIMER3_IRQHandler        ; 20: Timer3
                DCD     UART0_IRQHandler         ; 21: UART0
                DCD     UART1_IRQHandler         ; 22: UART1
                DCD     UART2_IRQHandler         ; 23: UART2
                DCD     UART3_IRQHandler         ; 24: UART3
                DCD     PWM1_IRQHandler          ; 25: PWM1
                DCD     I2C0_IRQHandler          ; 26: I2C0
                DCD     I2C1_IRQHandler          ; 27: I2C1
                DCD     I2C2_IRQHandler          ; 28: I2C2
                DCD     SPI_IRQHandler           ; 29: SPI
                DCD     SSP0_IRQHandler          ; 30: SSP0
                DCD     SSP1_IRQHandler          ; 31: SSP1
                DCD     PLL0_IRQHandler          ; 32: PLL0 Lock (Main PLL)
                DCD     RTC_IRQHandler           ; 33: Real Time Clock
                DCD     EINT0_IRQHandler         ; 34: External Interrupt 0
                DCD     EINT1_IRQHandler         ; 35: External Interrupt 1
                DCD     EINT2_IRQHandler         ; 36: External Interrupt 2
                DCD     EINT3_IRQHandler         ; 37: External Interrupt 3
                DCD     ADC_IRQHandler           ; 38: A/D Converter
                DCD     BOD_IRQHandler           ; 39: Brown-Out Detect
                DCD     USB_IRQHandler           ; 40: USB
                DCD     CAN_IRQHandler           ; 41: CAN
                DCD     DMA_IRQHandler           ; 42: General Purpose DMA
                DCD     I2S_IRQHandler           ; 43: I2S
                DCD     ENET_IRQHandler          ; 44: Ethernet
                DCD     RIT_IRQHandler           ; 45: Repetitive Interrupt Timer
                DCD     MCPWM_IRQHandler         ; 46: Motor Control PWM
                DCD     QEI_IRQHandler           ; 47: Quadrature Encoder Interface
                DCD     PLL1_IRQHandler          ; 48: PLL1 Lock (USB PLL)


                IF      :LNOT::DEF:NO_CRP
                AREA    |.ARM.__at_0x02FC|, CODE, READONLY
CRP_Key         DCD     0xFFFFFFFF
                ENDIF


                AREA    |.text|, CODE, READONLY


; Reset Handler

Reset_Handler   PROC
                EXPORT  Reset_Handler             [WEAK]
                IMPORT  __main
                LDR     R0, =__main
                BX      R0
                ENDP


; Dummy Exception Handlers (infinite loops which can be modified)                

NMI_Handler     PROC
                EXPORT  NMI_Handler               [WEAK]
                B       .
                ENDP
HardFault_Handler\
                PROC
                EXPORT  HardFault_Handler         [WEAK]
                B       .
                ENDP
MemManage_Handler\
                PROC
                EXPORT  MemManage_Handler         [WEAK]
                B       .
                ENDP
BusFault_Handler\
                PROC
                EXPORT  BusFault_Handler          [WEAK]
                B       .
                ENDP
UsageFault_Handler\
                PROC
                EXPORT  UsageFault_Handler        [WEAK]
                B       .
                ENDP
SVC_Handler     PROC
                EXPORT  SVC_Handler               [WEAK]
                B       .
                ENDP
DebugMon_Handler\
                PROC
                EXPORT  DebugMon_Handler          [WEAK]
                B       .
                ENDP
PendSV_Handler  PROC
                EXPORT  PendSV_Handler            [WEAK]
                B       .
                ENDP
SysTick_Handler PROC
                EXPORT  SysTick_Handler           [WEAK]
                B       .
                ENDP

Default_Handler PROC

                EXPORT  WDT_IRQHandler            [WEAK]
                EXPORT  TIMER0_IRQHandler         [WEAK]
                EXPORT  TIMER1_IRQHandler         [WEAK]
                EXPORT  TIMER2_IRQHandler         [WEAK]
                EXPORT  TIMER3_IRQHandler         [WEAK]
                EXPORT  UART0_IRQHandler          [WEAK]
                EXPORT  UART1_IRQHandler          [WEAK]
                EXPORT  UART2_IRQHandler          [WEAK]
                EXPORT  UART3_IRQHandler          [WEAK]
                EXPORT  PWM1_IRQHandler           [WEAK]
                EXPORT  I2C0_IRQHandler           [WEAK]
                EXPORT  I2C1_IRQHandler           [WEAK]
                EXPORT  I2C2_IRQHandler           [WEAK]
                EXPORT  SPI_IRQHandler            [WEAK]
                EXPORT  SSP0_IRQHandler           [WEAK]
                EXPORT  SSP1_IRQHandler           [WEAK]
                EXPORT  PLL0_IRQHandler           [WEAK]
                EXPORT  RTC_IRQHandler            [WEAK]
                EXPORT  EINT0_IRQHandler          [WEAK]
                EXPORT  EINT1_IRQHandler          [WEAK]
                EXPORT  EINT2_IRQHandler          [WEAK]
                EXPORT  EINT3_IRQHandler          [WEAK]
                EXPORT  ADC_IRQHandler            [WEAK]
                EXPORT  BOD_IRQHandler            [WEAK]
                EXPORT  USB_IRQHandler            [WEAK]
                EXPORT  CAN_IRQHandler            [WEAK]
                EXPORT  DMA_IRQHandler            [WEAK]
                EXPORT  I2S_IRQHandler            [WEAK]
                EXPORT  ENET_IRQHandler           [WEAK]
                EXPORT  RIT_IRQHandler            [WEAK]
                EXPORT  MCPWM_IRQHandler          [WEAK]
                EXPORT  QEI_IRQHandler            [WEAK]
                EXPORT  PLL1_IRQHandler           [WEAK]

WDT_IRQHandler          
TIMER0_IRQHandler        
TIMER1_IRQHandler        
TIMER2_IRQHandler        
TIMER3_IRQHandler        
UART0_IRQHandler          
UART1_IRQHandler          
UART2_IRQHandler          
UART3_IRQHandler          
PWM1_IRQHandler          
I2C0_IRQHandler          
I2C1_IRQHandler          
I2C2_IRQHandler          
SPI_IRQHandler            
SSP0_IRQHandler          
SSP1_IRQHandler          
PLL0_IRQHandler          
RTC_IRQHandler            
EINT0_IRQHandler          
EINT1_IRQHandler          
EINT2_IRQHandler          
EINT3_IRQHandler          
ADC_IRQHandler            
BOD_IRQHandler            
USB_IRQHandler            
CAN_IRQHandler            
DMA_IRQHandler          
I2S_IRQHandler            
ENET_IRQHandler      
RIT_IRQHandler          
MCPWM_IRQHandler            
QEI_IRQHandler            
PLL1_IRQHandler          

                B       .

                ENDP


                ALIGN


; User Initial Stack & Heap

                IF      :DEF:__MICROLIB
                
                EXPORT  __initial_sp
                EXPORT  __heap_base
                EXPORT  __heap_limit
                
                ELSE
                
                IMPORT  __use_two_region_memory
                EXPORT  __user_initial_stackheap
__user_initial_stackheap

                LDR     R0, =  Heap_Mem
                LDR     R1, =(Stack_Mem + Stack_Size)
                LDR     R2, = (Heap_Mem +  Heap_Size)
                LDR     R3, = Stack_Mem
                BX      LR

                ALIGN

                ENDIF


                END

Стандартный startup.