I want to use Keil IDE to create RLP procedures for my G400. What should I put to “R/O base” and “R/W base” textboxes under Linker tab in Keil’s project options? G400 page only state “Address Range: 0xA0000000 ~ 0xA17FFFF8”, but I’m not educated enough to translate that for Keil. Could anyone help me?
I have a feeling a made it work a few months ago, but now I just cannot remember the correct configuration 
Still an exception on
:(Just did that. Thanks in advance.
@ Simon from Vilnius - 0xA17FFFF8 is the end of the memory reserved for RLP. By setting the R/W base to this address, you are asking the compiler to place all R/W data starting at the end of the RLP memory which has the risk of overwriting memory that the system is using for other purposes.
Since the RLP memory is used for all your memory both constant (R/O) and variable (R/W) I would keep it simple initially and set both bases to the same address. Or you can set the R/W to somewhere halfway into the RLP region then check the map file to tweak the values bases on the actual amount of R/O memory you need. But personally I would keep it simple.
While I have done a lot of RLP on Spider, Cerb and Hydra I have not done any RLP work on the G400.Thanks guys for your help, but I still get an exception on RLP.InitializeBSSRegion():
An unhandled exception of type 'System.Exception' occurred in GHI.Premium.Native.dll
#### Exception System.Exception - 0xffffffff (1) ####
#### Message:
#### GHI.Premium.Native.RLP::FindSymbol [IP: 0000] ####
#### GHI.Premium.Native.RLP::InitializeBSSRegion [IP: 0006] ####
#### GHI.Premium.Native.RLP::InitializeBSSRegion [IP: 000a] ####
I guess I need some help from GHI gurus…
can you post the linker’s output .map file?
also the snippet of C# source code from where you call LoadELF to where you call InitializeBSSRegion
Native function:
#include "RLP.h"
int TrivialFunction(unsigned int *generalArray, void **args, unsigned int argsCount, unsigned int *argSize)
{
return 123;
}
Code that calls it:
public class Program {
public static void Main() {
var gogo = Resources.GetBytes(Resources.BinaryResources.G400RlpTest);
RLP.LoadELF(gogo);
RLP.InitializeBSSRegion(gogo); //<--- dies here
var trivialFunction = RLP.GetProcedure(gogo, "TrivialFunction");
Debug.Print("This is trivial: " + trivialFunction.InvokeEx(new byte[0]));
}
}
Map file:
==============================================================================
Section Cross References
==============================================================================
Image Symbol Table
Local Symbols
Symbol Name Value Ov Type Size Object(Section)
TrivialFunction.c 0x00000000 Number 0 trivialfunction.o ABSOLUTE
.text 0xa0000000 Section 0 trivialfunction.o(.text)
Global Symbols
Symbol Name Value Ov Type Size Object(Section)
BuildAttributes$$THM_ISAv2$ARM_ISAv5$E$P$J$S$PE$A:L22$X:L11$S22$IEEE1$IW$USESV6$~STKCKD$USESV7$~SHL$OSPACE$EBA8$STANDARDLIB$REQ8$PRES8$EABIv2 0x00000000 Number 0 anon$$obj.o ABSOLUTE
TrivialFunction 0xa0000000 ARM Code 12 trivialfunction.o(.text)
==============================================================================
Memory Map of the image
Image Entry point : 0xa0000000
Load Region LR_1 (Base: 0xa0000000, Size: 0x0000000c, Max: 0xffffffff, ABSOLUTE)
Execution Region ER_RO (Base: 0xa0000000, Size: 0x0000000c, Max: 0xffffffff, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0xa0000000 0x0000000c Code RO 1 * .text trivialfunction.o
Execution Region ER_RW (Base: 0xa1000000, Size: 0x00000000, Max: 0xffffffff, ABSOLUTE)
**** No section assigned to this execution region ****
Execution Region ER_ZI (Base: 0xa1000000, Size: 0x00000000, Max: 0xffffffff, ABSOLUTE)
**** No section assigned to this execution region ****
==============================================================================
Image component sizes
Code (inc. data) RO Data RW Data ZI Data Debug Object Name
12 0 0 0 0 2002 trivialfunction.o
----------------------------------------------------------------------
12 0 0 0 0 2002 Object Totals
0 0 0 0 0 0 (incl. Generated)
0 0 0 0 0 0 (incl. Padding)
----------------------------------------------------------------------
0 0 0 0 0 0 Library Totals
0 0 0 0 0 0 (incl. Padding)
----------------------------------------------------------------------
==============================================================================
Code (inc. data) RO Data RW Data ZI Data Debug
12 0 0 0 0 2002 Grand Totals
12 0 0 0 0 2002 ELF Image Totals
12 0 0 0 0 0 ROM Totals
==============================================================================
Total RO Size (Code + RO Data) 12 ( 0.01kB)
Total RW Size (RW Data + ZI Data) 0 ( 0.00kB)
Total ROM Size (Code + RO Data + RW Data) 12 ( 0.01kB)
==============================================================================
Keil config: MCU=SAM9x35. R/O base=0xA0000000, R/W base=0xA1000000
need to see linker script, your map file is missing two vary important symbols:
[ol]bss_start
bss_end[/ol]
I believe to get your example to run, remove the InitializeBSSRegion. In your example the size of that region is zero, so the call (if it worked) would do nothing.
For larger native functions you have two choices:
[ol]instead of InitializeBSSRegion, examine your linker map find the line: [quote]Execution Region ER_ZI (Base: 0xa1000000, Size: 0x00000000, Max: 0xffffffff, ABSOLUTE)[/quote] Then instead of InitializeBSS… put[quote] InitializeZeroRegion({Base address}, {size})[/quote]
Take a look at the linker script provided in https://www.ghielectronics.com/downloads/src/RLP_User.zip in it you will find the way the two missing symbols are created. You will need to add a similar construct to your linker script.
[/ol]
For an explanation, go to https://www.ghielectronics.com/downloads/man/Library_Documentation_v4.2/Premium/Index.html then navigate: [em]GHI.Premium.Native Namespace>RLP Class>RLP_Methods>IntializeBSSRegion Method [/em]
EDIT: enumerated methods, fixed Message throwing away non-html
Thanks Jeff. Now I pretty much get it. This is Keil, it does not have a linker script, or it is hidden somewhere, so I cannot control those bss_start and bss_end tags. But I can look in the map file and use InitializeZeroRegion. Sweet. It works now!
Glad you got it working. I learned a lot trying to help you on this (thanks) 
Hello, I’m in the same situation
How did you use InitializeZeroRegion({Base address}, {size}) ?
Thanks
elf_file = Resources.GetBytes(Resources.BinaryResources.testrlp);
Debug.Print("Loading");
RLP.LoadELF(elf_file);
Debug.Print("Initializing");
RLP.InitializeZeroRegion(0xa1000000, 0x10000);
RLP.InitializeBSSRegion(elf_file);
initISR = RLP.GetProcedure(elf_file, "Init");
Execution Region ER_RW (Base: 0xa1000000, Size: 0x00000000, Max: 0xffffffff, ABSOLUTE)
**** No section assigned to this execution region ****
Execution Region ER_ZI (Base: 0xa1000000, Size: 0x00000128, Max: 0xffffffff, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0xa1000000 0x00000060 Zero RW 60 .bss c_5.l(libspace.o)
0xa1000060 0x00000000 Zero RW 2 HEAP sam9x35.o
0xa1000060 0x000000c8 Zero RW 1 STACK sam9x35.o
==============================================================================
Image component sizes
Code (inc. data) RO Data RW Data ZI Data Debug Object Name
20 0 0 0 0 2167 rlplaser.o
32 12 0 0 200 216 sam9x35.o
----------------------------------------------------------------------
52 12 16 0 200 2383 Object Totals
0 0 16 0 0 0 (incl. Generated)
0 0 0 0 0 0 (incl. Padding)That’s your magic numbers:
Also, do not use InitializeBSSRegion() then.
Thank you for your help.
With the option “Debug information” friends it works it does not work if this option is unchecked.
The problem is that the file is too big with a few lines of code.
with code:
int Init(unsigned int *generalArray, void **args, unsigned int argsCount, unsigned int *argSize)
{
return 123;
}
Work Ok :
**** No section assigned to this execution region ****
Execution Region ER_ZI (Base: 0xa1000000, Size: 0x00000128, Max: 0xffffffff, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0xa1000000 0x00000060 Zero RW 242 .bss c_5.l(libspace.o)
0xa1000060 0x00000000 Zero RW 2 HEAP sam9x35.o
0xa1000060 0x000000c8 Zero RW 1 STACK sam9x35.o
==============================================================================
Image component sizes
Code (inc. data) RO Data RW Data ZI Data Debug Object Name
20 0 0 0 0 2148 rlplaser.o
32 12 0 0 200 216 sam9x35.o
----------------------------------------------------------------------
52 12 16 0 200 2364 Object Totals
0 0 16 0 0 0 (incl. Generated)
0 0 0 0 0 0 (incl. Padding)
----------------------------------------------------------------------
Not Work:
**** No section assigned to this execution region ****
Execution Region ER_ZI (Base: 0xa1000000, Size: 0x00000128, Max: 0xffffffff, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0xa1000000 0x00000060 Zero RW 64 .bss c_5.l(libspace.o)
0xa1000060 0x00000000 Zero RW 2 HEAP sam9x35.o
0xa1000060 0x000000c8 Zero RW 1 STACK sam9x35.o
==============================================================================
Image component sizes
Code (inc. data) RO Data RW Data ZI Data Debug Object Name
20 0 0 0 0 0 rlplaser.o
32 12 0 0 200 0 sam9x35.o
----------------------------------------------------------------------
52 12 16 0 200 0 Object Totals
0 0 16 0 0 0 (incl. Generated)
0 0 0 0 0 0 (incl. Padding)
----------------------------------------------------------------------
axf file too large
static Twid twid;
/** Page buffer.*/
static uint8_t pData[PAGE_SIZE];
/**
* \brief TWI interrupt handler. Forwards the interrupt to the TWI driver handler.
*/
static void TWI1_IrqHandler( void )
{
TWID_Handler( &twid ) ;
}
int Init(unsigned int *generalArray, void **args, unsigned int argsCount, unsigned int *argSize)
{
/* Configure TWI pins. */
PIO_Configure(pins, PIO_LISTSIZE(pins));
/* Enable TWI peripheral clock */
PMC_EnablePeripheral(ID_TWI0);
/* Configure TWI */
TWI_ConfigureMaster(BOARD_BASE_TWI_EEPROM, TWCK, BOARD_MCK);
TWID_Initialize(&twid, BOARD_BASE_TWI_EEPROM);
/* Configure TWI interrupts */
IRQ_ConfigureIT(BOARD_ID_TWI_EEPROM, 0, TWI1_IrqHandler);
IRQ_EnableIT(BOARD_ID_TWI_EEPROM);
/* Erase page #0 and #1 */
//memset(pData, 0, PAGE_SIZE);
//printf("-I- Filling page #0 with zeroes ...\n\r");
TWID_Write(&twid, AT24C_ADDRESS, 0x0000, 2, pData, PAGE_SIZE, 0);
return 123;
}
Map File :
Execution Region ER_ZI (Base: 0xa1000008, Size: 0x000001a8, Max: 0xffffffff, ABSOLUTE)
Base Addr Size Type Attr Idx E Section Name Object
0xa1000008 0x00000080 Zero RW 12 .bss rlplaser.o
0xa1000088 0x00000060 Zero RW 246 .bss c_5.l(libspace.o)
0xa10000e8 0x00000000 Zero RW 2 HEAP sam9x35.o
0xa10000e8 0x000000c8 Zero RW 1 STACK sam9x35.o
==============================================================================
Image component sizes
Code (inc. data) RO Data RW Data ZI Data Debug Object Name
88 0 0 0 0 322669 aic.o
0 0 0 0 0 364 async.o
1064 12 0 0 0 4996 pio.o
316 20 0 0 0 1136 pmc.o
196 28 24 8 128 332220 rlplaser.o
32 12 0 0 200 216 sam9x35.o
1472 228 0 0 0 3988 twi.o
1488 144 0 0 0 3452 twid.o
I’m discouraged, I looked forward to the Raptor but I’ll Give Up the map, or nothing works