Hello,
I have a few configurable parameters in our application that I would like to store in a specific area of memory that can be reflashed at end of line to customer specification. We are using the RM48L952PGE MCU.
At present the application uses simple #defines for each parameter. To affect the end of line procedure I envisage the following
1. Declare the configuration parameters in a specific area of memory
2. Write a simple tool to write required values to the relevant addresses as determined from the linker map file.
3. I expect that I will have to recalculate the ECC values at end of line and flash them too.
I have followed the methods of some forum posts on this subject using the SET_DATA_SECTION or DATA_SECTION pragma directives. However I always get an error in the debugger if I try to read or view the memory address. The debugger error is
CortexR4: Trouble Reading Memory Block at 0x2ff000 on Page 0 of Length 0xd8: (Error -1170 @ 0x0) Unable to access the DAP. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 5.1.73.0)
The code I have declares the variable uni_test_param to a specific section UNI_CONFIGS:
#pragma DATA_SECTION(uni_test_param,".UNI_CONFIGS");
const unsigned int uni_test_param[6] =
{
0xC67E816B,
0x4BFBE2FB,
0x54F6BDDF,
0x7C1CE187,
0x01BF31DE,
0x56720F47
};
My memory configuration is a follows:
VECTORS (X) : origin=0x00000000 length=0x00000020
KERNEL (RX) : origin=0x00000020 length=0x00008000
FLASH0 (RX) : origin=0x00008020 length=0x0017FFE0
FLASH1 (RX) : origin=0x00188000 length=0x00177000
UNI_CONF_SEC (RW) : origin=0x002FF000 length=0x00001000
STACKS (RW) : origin=0x08000000 length=0x00003500
KRAM (RW) : origin=0x08003500 length=0x00000800
/* RAM = 256KB - STACKS - KRAM */
RAM (RW) : origin=(0x08003500+0x00000800) length=0x0003AE00
.intvecs : {} > VECTORS
/* FreeRTOS Kernel in protected region of Flash */
.kernelTEXT : { sys_startup.obj(.const)
os_tasks.obj (.const:.string)
-l=rtsv7R4_T_le_v3D16_eabi.lib<auto_init.obj> (.text)
-l=rtsv7R4_T_le_v3D16_eabi.lib<copy_decompress_rle.obj> (*)
-l=rtsv7R4_T_le_v3D16_eabi.lib<cpy_tbl.obj> (*)
-l=rtsv7R4_T_le_v3D16_eabi.lib<copy_zero_init.obj> (*)
-l=rtsv7R4_T_le_v3D16_eabi.lib<copy_decompress_none.obj> (*)
-l=rtsv7R4_T_le_v3D16_eabi.lib<icall32.obj> (.text)
-l=rtsv7R4_T_le_v3D16_eabi.lib<memset32.obj> (.text)
-l=rtsv7R4_T_le_v3D16_eabi.lib<memcpy32.obj> (.text)
} > KERNEL
.UNI_CONFIGS : {} > UNI_CONF_SEC
.cinit : {} > KERNEL
.pinit : {} > KERNEL
/* Rest of code to user mode flash region */
.text : {} > FLASH0 | FLASH1
.const : {} > FLASH0 | FLASH1
/* FreeRTOS Kernel data in protected region of RAM */
.kernelBSS : {} > KRAM
.kernelHEAP : {} > RAM
.bss : {} > RAM
.data : {} > RAM
Any advice is much appreciated, alternative approaches to meeting this requirement would also be appreciated.
Jamie
