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LP-AM261: Problems when loading C application on the PRU programmatically (stuck in __TI_decompress_lzss)

Daniel Watson
Prodigy 185 points
Part Number: LP-AM261


Tool/software:

Hi!

I am having some problems when loading my C PRU application programmatically from the R5 with PRUICSS_loadFirmware()
The same application runs just fine when I load it from JTAG.
And I have built another small C application which just toggles a LED on/off, that one runs just fine when I load it from the R5 PRUICSS_loadFirmware()
But when I load my other application from the R5 and load the symbols on the PRU, it seems to be continuously calling __TI_decompress_lzss() and I don't understand why.
I do not have that problem when loading it from JTAG and my other "led blink" application does not exhibit the same problems when loaded from PRUICSS_loadFirmware().

Could you please help me figure out what is going on?

Best regards
Daniel

  • 0
    TI__Mastermind 48640 points

    Hi Daniel,

    Thank you for sharing the details,

    Allow me sometime to reproduce this and debug the issue, I will try to get back by early next week.

  • 0 in reply to Nilabh Anand
    TI__Mastermind 48640 points

    Hi Daniel,

    I was not able to reproduce this,

    Did you set the entry point of the PRU project properly in arm linker option in project setting. Looks like that is missing.

  • 0 in reply to Nilabh Anand
    Prodigy 185 points

    Hi Nilabh,

    I tried setting in to main in the project  "--entry_point=main" but makes no difference.

    Here is my original map file without setting the entry point to main.

    ******************************************************************************
                     PRU Linker PC v2.3.3                      
******************************************************************************
>> Linked Tue Sep  2 15:44:08 2025

OUTPUT FILE NAME:   <PRU_0.out>
ENTRY POINT SYMBOL: "_c_int00_noargs"  address: 00000458


MEMORY CONFIGURATION

         name            origin    length      used     unused   attr    fill
----------------------  --------  ---------  --------  --------  ----  --------
PAGE 0:
  PRU_IMEM              00000000   00003000  000004b4  00002b4c  RWIX

PAGE 1:
  PRU0_DMEM_0           00000000   00002000  00000160  00001ea0  RWIX
  PRU0_DMEM_1           00002000   00002000  00000000  00002000  RWIX

PAGE 2:
  PRU_SHAREDMEM         00010000   00008000  00000000  00008000  RWIX


SECTION ALLOCATION MAP

 output                                  attributes/
section   page    origin      length       input sections
--------  ----  ----------  ----------   ----------------
.text      0    00000000    000004b4     
                  00000000    000000d0     rtspruv3_le.lib : copy_decompress_lzss.c.obj (.text:decompress:lzss:__TI_decompress_lzss)
                  000000d0    00000088                     : autoinit.c.obj (.text:__TI_auto_init_nobinit_nopinit:__TI_auto_init_nobinit_nopinit)
                  00000158    00000080     main.obj (.text:send_pixel)
                  000001d8    00000078     main.obj (.text:send_frame)
                  00000250    00000068     main.obj (.text:send_zero)
                  000002b8    00000064     main.obj (.text:send_one)
                  0000031c    00000040     main.obj (.text:delay_ms)
                  0000035c    00000034     rtspruv3_le.lib : memcpy.asm.obj (.text)
                  00000390    0000002c     main.obj (.text:error)
                  000003bc    00000028     rtspruv3_le.lib : copy_decompress_none.c.obj (.text:decompress:none:__TI_decompress_none)
                  000003e4    00000028     main.obj (.text:init)
                  0000040c    00000028     main.obj (.text:main)
                  00000434    00000024     main.obj (.text:send_reset)
                  00000458    00000020     rtspruv3_le.lib : boot.c.obj (.text:_c_int00_noargs)
                  00000478    0000001c     main.obj (.text:wait_for_interrupt)
                  00000494    0000000c     main.obj (.text:send_interrupt_to_r5)
                  000004a0    00000008     rtspruv3_le.lib : exit.c.obj (.text:abort)
                  000004a8    00000008                     : exit.c.obj (.text:loader_exit)
                  000004b0    00000004                     : startup.c.obj (.text:_system_post_cinit)

.stack     1    00000000    00000100     UNINITIALIZED
                  00000000    00000004     rtspruv3_le.lib : boot.c.obj (.stack)
                  00000004    000000fc     --HOLE--

.data      1    00000100    00000044     UNINITIALIZED
                  00000100    00000020     main.obj (.data:blank_frame)
                  00000120    00000020     main.obj (.data:red_frame)
                  00000140    00000004     main.obj (.data)

.cinit     1    00000144    0000001c     
                  00000144    0000000f     (.cinit..data.load) [load image, compression = lzss]
                  00000153    00000001     --HOLE-- [fill = 0]
                  00000154    00000004     (__TI_handler_table)
                  00000158    00000008     (__TI_cinit_table)

MODULE SUMMARY

       Module                       code   ro data   rw data
       ------                       ----   -------   -------
    .\
       main.obj                     716    0         68     
    +--+----------------------------+------+---------+---------+
       Total:                       716    0         68     
                                                            
    C:\App\ti\ti-cgt-pru_2.3.3\lib\rtspruv3_le.lib
       copy_decompress_lzss.c.obj   208    0         0      
       autoinit.c.obj               136    0         0      
       memcpy.asm.obj               52     0         0      
       copy_decompress_none.c.obj   40     0         0      
       boot.c.obj                   32     0         0      
       exit.c.obj                   16     0         0      
       startup.c.obj                4      0         0      
    +--+----------------------------+------+---------+---------+
       Total:                       488    0         0      
                                                            
       Stack:                       0      0         256    
       Linker Generated:            0      27        0      
    +--+----------------------------+------+---------+---------+
       Grand Total:                 1204   27        324    


LINKER GENERATED COPY TABLES

__TI_cinit_table @ 00000158 records: 1, size/record: 8, table size: 8
	.data: load addr=00000144, load size=0000000f bytes, run addr=00000100, run size=00000044 bytes, compression=lzss


LINKER GENERATED HANDLER TABLE

__TI_handler_table @ 00000154 records: 2, size/record: 2, table size: 4
	index: 0, handler: __TI_decompress_lzss
	index: 1, handler: __TI_decompress_none


SEGMENT ATTRIBUTES

    id tag      seg value
    -- ---      --- -----
     0 PHA_PAGE 1   1    
     1 PHA_PAGE 2   1    


GLOBAL SYMBOLS: SORTED ALPHABETICALLY BY Name 

page  address   name                          
----  -------   ----                          
0     000004a8  C$$EXIT                       
1     00000158  __TI_CINIT_Base               
1     00000160  __TI_CINIT_Limit              
1     00000154  __TI_Handler_Table_Base       
1     00000158  __TI_Handler_Table_Limit      
1     00000100  __TI_STACK_END                
abs   00000100  __TI_STACK_SIZE               
0     000000d0  __TI_auto_init_nobinit_nopinit
0     00000000  __TI_decompress_lzss          
0     000003bc  __TI_decompress_none          
abs   ffffffff  __c_args__                    
0     00000458  _c_int00_noargs               
1     00000000  _stack                        
0     000004b0  _system_post_cinit            
0     000004a0  abort                         
1     00000100  blank_frame                   
0     0000031c  delay_ms                      
0     00000390  error                         
0     000003e4  init                          
0     0000040c  main                          
0     0000035c  memcpy                        
1     00000120  red_frame                     
0     000001d8  send_frame                    
0     00000494  send_interrupt_to_r5          
0     000002b8  send_one                      
0     00000158  send_pixel                    
0     00000434  send_reset                    
0     00000250  send_zero                     
1     00000140  shared_mem                    
0     00000478  wait_for_interrupt            


GLOBAL SYMBOLS: SORTED BY Symbol Address 

page  address   name                          
----  -------   ----                          
0     00000000  __TI_decompress_lzss          
0     000000d0  __TI_auto_init_nobinit_nopinit
0     00000158  send_pixel                    
0     000001d8  send_frame                    
0     00000250  send_zero                     
0     000002b8  send_one                      
0     0000031c  delay_ms                      
0     0000035c  memcpy                        
0     00000390  error                         
0     000003bc  __TI_decompress_none          
0     000003e4  init                          
0     0000040c  main                          
0     00000434  send_reset                    
0     00000458  _c_int00_noargs               
0     00000478  wait_for_interrupt            
0     00000494  send_interrupt_to_r5          
0     000004a0  abort                         
0     000004a8  C$$EXIT                       
0     000004b0  _system_post_cinit            
1     00000000  _stack                        
1     00000100  __TI_STACK_END                
1     00000100  blank_frame                   
1     00000120  red_frame                     
1     00000140  shared_mem                    
1     00000154  __TI_Handler_Table_Base       
1     00000158  __TI_CINIT_Base               
1     00000158  __TI_Handler_Table_Limit      
1     00000160  __TI_CINIT_Limit              
abs   00000100  __TI_STACK_SIZE               
abs   ffffffff  __c_args__                    

[30 symbols]

    Here is the map file with the entry point set to main.

    ******************************************************************************
                     PRU Linker PC v2.3.3                      
******************************************************************************
>> Linked Tue Sep  2 15:46:54 2025

OUTPUT FILE NAME:   <PRU_0.out>
ENTRY POINT SYMBOL: "main"  address: 00000384


MEMORY CONFIGURATION

         name            origin    length      used     unused   attr    fill
----------------------  --------  ---------  --------  --------  ----  --------
PAGE 0:
  PRU_IMEM              00000000   00003000  000003f8  00002c08  RWIX

PAGE 1:
  PRU0_DMEM_0           00000000   00002000  00000060  00001fa0  RWIX
  PRU0_DMEM_1           00002000   00002000  00000000  00002000  RWIX

PAGE 2:
  PRU_SHAREDMEM         00010000   00008000  00000000  00008000  RWIX


SECTION ALLOCATION MAP

 output                                  attributes/
section   page    origin      length       input sections
--------  ----  ----------  ----------   ----------------
.text      0    00000000    000003f8     
                  00000000    000000d0     rtspruv3_le.lib : copy_decompress_lzss.c.obj (.text:decompress:lzss:__TI_decompress_lzss)
                  000000d0    00000080     main.obj (.text:send_pixel)
                  00000150    00000078     main.obj (.text:send_frame)
                  000001c8    00000068     main.obj (.text:send_zero)
                  00000230    00000064     main.obj (.text:send_one)
                  00000294    00000040     main.obj (.text:delay_ms)
                  000002d4    00000034     rtspruv3_le.lib : memcpy.asm.obj (.text)
                  00000308    0000002c     main.obj (.text:error)
                  00000334    00000028     rtspruv3_le.lib : copy_decompress_none.c.obj (.text:decompress:none:__TI_decompress_none)
                  0000035c    00000028     main.obj (.text:init)
                  00000384    00000028     main.obj (.text:main)
                  000003ac    00000024     main.obj (.text:send_reset)
                  000003d0    0000001c     main.obj (.text:wait_for_interrupt)
                  000003ec    0000000c     main.obj (.text:send_interrupt_to_r5)

.data      1    00000000    00000044     UNINITIALIZED
                  00000000    00000020     main.obj (.data:blank_frame)
                  00000020    00000020     main.obj (.data:red_frame)
                  00000040    00000004     main.obj (.data)

.cinit     1    00000044    0000001c     
                  00000044    0000000f     (.cinit..data.load) [load image, compression = lzss]
                  00000053    00000001     --HOLE-- [fill = 0]
                  00000054    00000004     (__TI_handler_table)
                  00000058    00000008     (__TI_cinit_table)

MODULE SUMMARY

       Module                       code   ro data   rw data
       ------                       ----   -------   -------
    .\
       main.obj                     716    0         68     
    +--+----------------------------+------+---------+---------+
       Total:                       716    0         68     
                                                            
    C:\App\ti\ti-cgt-pru_2.3.3\lib\rtspruv3_le.lib
       copy_decompress_lzss.c.obj   208    0         0      
       memcpy.asm.obj               52     0         0      
       copy_decompress_none.c.obj   40     0         0      
    +--+----------------------------+------+---------+---------+
       Total:                       300    0         0      
                                                            
       Linker Generated:            0      27        0      
    +--+----------------------------+------+---------+---------+
       Grand Total:                 1016   27        68     


LINKER GENERATED COPY TABLES

__TI_cinit_table @ 00000058 records: 1, size/record: 8, table size: 8
	.data: load addr=00000044, load size=0000000f bytes, run addr=00000000, run size=00000044 bytes, compression=lzss


LINKER GENERATED HANDLER TABLE

__TI_handler_table @ 00000054 records: 2, size/record: 2, table size: 4
	index: 0, handler: __TI_decompress_lzss
	index: 1, handler: __TI_decompress_none


SEGMENT ATTRIBUTES

    id tag      seg value
    -- ---      --- -----
     0 PHA_PAGE 1   1    
     1 PHA_PAGE 2   1    


GLOBAL SYMBOLS: SORTED ALPHABETICALLY BY Name 

page  address   name                    
----  -------   ----                    
1     00000058  __TI_CINIT_Base         
1     00000060  __TI_CINIT_Limit        
1     00000054  __TI_Handler_Table_Base 
1     00000058  __TI_Handler_Table_Limit
0     00000000  __TI_decompress_lzss    
0     00000334  __TI_decompress_none    
abs   ffffffff  __c_args__              
1     00000000  blank_frame             
0     00000294  delay_ms                
0     00000308  error                   
0     0000035c  init                    
0     00000384  main                    
0     000002d4  memcpy                  
1     00000020  red_frame               
0     00000150  send_frame              
0     000003ec  send_interrupt_to_r5    
0     00000230  send_one                
0     000000d0  send_pixel              
0     000003ac  send_reset              
0     000001c8  send_zero               
1     00000040  shared_mem              
0     000003d0  wait_for_interrupt      


GLOBAL SYMBOLS: SORTED BY Symbol Address 

page  address   name                    
----  -------   ----                    
0     00000000  __TI_decompress_lzss    
0     000000d0  send_pixel              
0     00000150  send_frame              
0     000001c8  send_zero               
0     00000230  send_one                
0     00000294  delay_ms                
0     000002d4  memcpy                  
0     00000308  error                   
0     00000334  __TI_decompress_none    
0     0000035c  init                    
0     00000384  main                    
0     000003ac  send_reset              
0     000003d0  wait_for_interrupt      
0     000003ec  send_interrupt_to_r5    
1     00000000  blank_frame             
1     00000020  red_frame               
1     00000040  shared_mem              
1     00000054  __TI_Handler_Table_Base 
1     00000058  __TI_CINIT_Base         
1     00000058  __TI_Handler_Table_Limit
1     00000060  __TI_CINIT_Limit        
abs   ffffffff  __c_args__              

[22 symbols]

    Best regards
    Daniel

  • 0 in reply to Daniel Watson
    TI__Mastermind 48640 points

    Hi Daniel,

    I will look into the project shared by you tomorrow, and give up an updated latest by Monday

  • 0 in reply to Nilabh Anand
    Prodigy 185 points

    Hi Nilabh!
    I have made some progress, I added  --ram_model to my PRU linker flags and I modified my PRU linker command script by adding .text:_c_int00* >  0x0,        PAGE 0 at the top of SECTIONS {
    So now I can load code on the PRU from the R5 and it's executing as expected.

    But now the access to the shared memory has stopped working, so when I write 0x55555555 from the PRU to the shared memory I only read 0 from the R5. 

    /* Specify the sections allocation into memory */
SECTIONS {

    .text:_c_int00* >  0x0,         PAGE 0
    .text           >  PRU_IMEM,    PAGE 0
    .bss            >  PRU0_DMEM_0, PAGE 1
    .stack          >  PRU0_DMEM_0, PAGE 1
    .data           >  PRU0_DMEM_0, PAGE 1
    .cinit          >  PRU0_DMEM_0, PAGE 1
    .rodata         >  PRU0_DMEM_0, PAGE 1
}


    ******************************************************************************
                     PRU Linker PC v2.3.3                      
******************************************************************************
>> Linked Fri Sep  5 13:17:14 2025

OUTPUT FILE NAME:   <PRU_0.out>
ENTRY POINT SYMBOL: "_c_int00_noinit_noargs"  address: 00000000


MEMORY CONFIGURATION

         name            origin    length      used     unused   attr    fill
----------------------  --------  ---------  --------  --------  ----  --------
PAGE 0:
  PRU_IMEM              00000000   00003000  000002f0  00002d10  RWIX

PAGE 1:
  PRU0_DMEM_0           00000000   00002000  00000144  00001ebc  RWIX
  PRU0_DMEM_1           00002000   00002000  00000000  00002000  RWIX

PAGE 2:
  PRU_SHAREDMEM         00010000   00008000  00000000  00008000  RWIX


SECTION ALLOCATION MAP

 output                                  attributes/
section   page    origin      length       input sections
--------  ----  ----------  ----------   ----------------
.text:_c_int00* 
*          0    00000000    0000001c     
                  00000000    0000001c     rtspruv3_le.lib : boot.c.obj (.text:_c_int00_noinit_noargs)

.text      0    0000001c    000002d4     
                  0000001c    00000080     main.obj (.text:send_pixel)
                  0000009c    00000078     main.obj (.text:send_frame)
                  00000114    00000068     main.obj (.text:send_zero)
                  0000017c    00000064     main.obj (.text:send_one)
                  000001e0    00000040     main.obj (.text:delay_ms)
                  00000220    0000002c     main.obj (.text:error)
                  0000024c    00000028     main.obj (.text:main)
                  00000274    00000024     main.obj (.text:send_reset)
                  00000298    00000020     main.obj (.text:init)
                  000002b8    0000001c     main.obj (.text:wait_for_interrupt)
                  000002d4    0000000c     main.obj (.text:send_interrupt_to_r5)
                  000002e0    00000008     rtspruv3_le.lib : exit.c.obj (.text:abort)
                  000002e8    00000008                     : exit.c.obj (.text:loader_exit)

.stack     1    00000000    00000100     UNINITIALIZED
                  00000000    00000004     rtspruv3_le.lib : boot.c.obj (.stack)
                  00000004    000000fc     --HOLE--

.data      1    00000100    00000044     
                  00000100    00000020     main.obj (.data:blank_frame)
                  00000120    00000020     main.obj (.data:red_frame)
                  00000140    00000004     main.obj (.data)

.cinit     1    00000000    00000000     UNINITIALIZED

MODULE SUMMARY

       Module         code   ro data   rw data
       ------         ----   -------   -------
    .\
       main.obj       708    0         68     
    +--+--------------+------+---------+---------+
       Total:         708    0         68     
                                              
    C:\App\ti\ti-cgt-pru_2.3.3\lib\rtspruv3_le.lib
       boot.c.obj     28     0         0      
       exit.c.obj     16     0         0      
    +--+--------------+------+---------+---------+
       Total:         44     0         0      
                                              
       Stack:         0      0         256    
    +--+--------------+------+---------+---------+
       Grand Total:   752    0         324    


SEGMENT ATTRIBUTES

    id tag      seg value
    -- ---      --- -----
     0 PHA_PAGE 1   1    
     1 PHA_PAGE 2   1    


GLOBAL SYMBOLS: SORTED ALPHABETICALLY BY Name 

page  address   name                  
----  -------   ----                  
0     000002e8  C$$EXIT               
1     00000100  __TI_STACK_END        
abs   00000100  __TI_STACK_SIZE       
abs   ffffffff  __c_args__            
0     00000000  _c_int00_noinit_noargs
1     00000000  _stack                
0     000002e0  abort                 
1     00000100  blank_frame           
0     000001e0  delay_ms              
0     00000220  error                 
0     00000298  init                  
0     0000024c  main                  
1     00000120  red_frame             
0     0000009c  send_frame            
0     000002d4  send_interrupt_to_r5  
0     0000017c  send_one              
0     0000001c  send_pixel            
0     00000274  send_reset            
0     00000114  send_zero             
1     00000140  shared_mem            
0     000002b8  wait_for_interrupt    


GLOBAL SYMBOLS: SORTED BY Symbol Address 

page  address   name                  
----  -------   ----                  
0     00000000  _c_int00_noinit_noargs
0     0000001c  send_pixel            
0     0000009c  send_frame            
0     00000114  send_zero             
0     0000017c  send_one              
0     000001e0  delay_ms              
0     00000220  error                 
0     0000024c  main                  
0     00000274  send_reset            
0     00000298  init                  
0     000002b8  wait_for_interrupt    
0     000002d4  send_interrupt_to_r5  
0     000002e0  abort                 
0     000002e8  C$$EXIT               
1     00000000  _stack                
1     00000100  __TI_STACK_END        
1     00000100  blank_frame           
1     00000120  red_frame             
1     00000140  shared_mem            
abs   00000100  __TI_STACK_SIZE       
abs   ffffffff  __c_args__            

[21 symbols]

  • 0 in reply to Daniel Watson
    TI__Mastermind 48640 points

    Hi Daniel,

    Due to release activity I have not been able to debug this issue, Allow me somemore time to get back with observation.

    I will try to share more details by friday.

  • 0 in reply to Nilabh Anand
    Prodigy 185 points

    Hi Nilabh,

    I think that my problems might have to do with the fact that PRUICSS_loadFirmware() only loads data to the instruction ram of the PRU. I found this in another thread "However, there can be some issues with loading C code with the MCU+ PRUICSS driver. Fixing that behavior is still on the TODO list. If you run into problems, please reach out to us."

    AM2432: am2432 multiplication in PRU - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

  • 0 in reply to Daniel Watson
    TI__Mastermind 48640 points

    Hi Daniel,

    I will work with the team to get a schedule on the API enablement, I will keep you posted here.

  • 0 in reply to Nilabh Anand
    Prodigy 185 points

    Hi Nilabh,
    This has set us back a lot in the project I am working on, so I can't wait for you to change the API and deliver another version of the SDK.
    Could you please provide me with some kind of workaround.

  • 0 in reply to Daniel Watson
    TI__Mastermind 48640 points

    Hi Daniel,

    Apologies for not being able to get back earlier, We have our internal team working on patch, which can be shared with you before end of this week.

  • +1 in reply to Nilabh Anand
    TI__Mastermind 48991 points

    Here is the method to load C program from R5F. Mostly self explanatory

    #ifdef TEST_C_LOAD
     /* Can NOT use PRUICSS_loadFirmware as it assumes entry point as 0x0 and also does not load .cinit sections */
     PRUICSS_disableCore(gPruIcss0Handle, PRUICSS_PRU0);
     /* Load .cinit section, offset (third parameter) below is .cinit  offset in DMEM from PRU map file */
     status = PRUICSS_writeMemory(gPruIcss0Handle, PRUICSS_DATARAM(PRUICSS_PRU0), 0x144U, (uint32_t *)pr1_pru1_led_strip_1, sizeof(pr1_pru1_led_strip_1));
     DebugP_assert(status != 0);
     status = PRUICSS_writeMemory(gPruIcss0Handle, PRUICSS_IRAM_PRU(PRUICSS_PRU0), 0x0U, (uint32_t *)pr1_pru1_led_strip_0, sizeof(pr1_pru1_led_strip_0));
     DebugP_assert(status != 0);
     PRUICSS_resetCore(gPruIcss0Handle, PRUICSS_PRU0);
     /*Set the PC to entry point _c_int00_noargs  from PRU map file, convert to word address (/4) and enable PRU */
     HW_WR_REG32_RAW(((uint32_t)(gPruIcss0Handle->hwAttrs->pru0CtrlRegBase) + CSL_ICSS_M_PR1_PDSP0_IRAM_CONTROL), ((0x458/4) << 16U) | 0x2U);
#else

    You can use HexPRU CCS project extension (or via command line to create data array for .cinit section) in above case pr1_pru1_led_strip_0 (.text section) and pr1_pru1_led_strip_1 (.cinit) was generated. Specifying offset of .cinit to load data sections (when ROM model is selected) and entry point (offset of _c_int00_noargs) is also pretty important as this initializes stack and switches to AUTO INIT and then main

    How to find .cinit load offset and entry point from map file

    Cleaner approach may be to use PRU Assembly Language Tools v2.1 (Rev. A) 12.3 Linking with ARM executable. Will need to try this

    We will also look to extend pruicss driver with loadFirmwarewithEntryPoint API

  • 0 in reply to PratheeshGangadhar
    Prodigy 185 points

    Hi Pratheesh,
    It finally works, thank you!!

    /Daniel

  • 0 in reply to PratheeshGangadhar
    Prodigy 185 points

    Would it be possible to skip the setting of entrypoint, if I force  _c_int00_noargs to end up offset 0x0 by setting ".text:_c_int00* >  0x0, PAGE 0" in the linker.cmd script? 

    /Daniel

  • +1 in reply to Daniel Watson
    TI__Mastermind 48991 points
    Daniel Watson said:
    I force  _c_int00_noargs to end up offset 0x0 by setting ".text:_c_int00* >  0x0, PAGE 0"

    Hi Daniel

    Yes, this works too and with this you can use existing PRUICSS_loadFirmware API itself.

         /* Load .cinit section, offset (third parameter) below is .cinit  offset in DMEM from PRU map file */
     status = PRUICSS_writeMemory(gPruIcss0Handle, PRUICSS_DATARAM(PRUICSS_PRU0), 0x144U, (uint32_t *)pr1_pru1_led_strip_1, sizeof(pr1_pru1_led_strip_1));
     DebugP_assert(status != 0);
     status = PRUICSS_loadFirmware(gPruIcss0Handle, PRUICSS_PRU0, pr1_pru1_led_strip_0, sizeof(pr1_pru1_led_strip_0));
     DebugP_assert(SystemP_SUCCESS == status);

    Linker.cmd reference for other users

    /* Specify the sections allocation into memory */
    SECTIONS {
    .text:_c_int00* > 0x0, PAGE 0
    .text > PRU_IMEM, PAGE 0
    .bss > PRU0_DMEM_0, PAGE 1
    .stack > PRU0_DMEM_0, PAGE 1
    .data > PRU0_DMEM_0, PAGE 1
    .cinit > PRU0_DMEM_0, PAGE 1
    .rodata > PRU0_DMEM_0, PAGE 1
    }

    Regards

    Pratheesh

  • 0 in reply to PratheeshGangadhar
    TI__Guru** 104860 points

    Hello Daniel,

    Could I get you to share your .map files with linker values of --ram_model and --rom_model? I would like to check the DMEM offsets for the first initialized data in both cases. Feel free to send me a direct message if you do not want to post that publicly.

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    Prodigy 185 points

    Hi Nick!
    I have sent you the information in a private message.

    /Daniel