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[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [February 2010 Threads] FreeRTOS and Secondary Bootloader FailPosted by Boris Estudiez on February 8, 2010 Hi,
I cannot get a FreeRTOS system to work from starting address 0x8000 with a secondary bootloader. I'm using a NXP LPC2148 microcontroller.
My application program crash when vTaskStartScheduler() is called.
If application program is located on flash address 0x0000, FreeRTOS works.
Anyone did something like this ?.
NOTES:
1) vTaskStartScheduler() is called in supervisor mode. Interrupt disabled.
2) Interrupt vector table is remaped to RAM with MEMMAP=2. First 64 bytes, from address 0x8000 are copied to RAM address 0x40000000.
3) Linker script memory areas: MEMORY { flash (rx): ORIGIN = 0x00008000, LENGTH = 468K ram_ivt(rwx): ORIGIN = 0x40000000, LENGTH = 64 ram (rwx): ORIGIN = 0x40000040, LENGTH = 32K-64 }
4) Secondary bootloader, jumps to user program (0x8000) in supervisor mode also.
5) FreeRTOS version: 6.0.2
6) Toolchain: GCC 4.1.1
7) MCU: LPC2148.
Thanks in advance.
Regards, Boris Estudiez.-
--- Slicetex Electronics www.slicetex.com.ar
RE: FreeRTOS and Secondary Bootloader FailPosted by Preet Kang on March 9, 2010 I am using LPC2148 with Secondary bootloader from SJvalley.com and it works perfectly. Secondary bootloader is of 4k in size and FreeRTOS works great. I think you might not be allocating correct supervisor stack or not entering supervisor mode before calling vTaskStartScheduler()
RE: FreeRTOS and Secondary Bootloader FailPosted by Boris Estudiez on March 12, 2010 Hi preetpal,
Are you using GCC ?.
Could you share your linker script and c-runtime assembler files, please ?.
Thanks in advance.
Regards, Boris Estudiez.-
--- Slicetex Electronics www.slicetex.com.ar
Thanks a lot
RE: FreeRTOS and Secondary Bootloader FailPosted by Preet Kang on March 12, 2010 I'm using GNUARM 4.3.2. Since I have WINARM installed, it grabs the cygwin sh/make.exe etc. from there.
Preet
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