I'm so close I can taste it. Just one more step. We have a system comprised of an ADSP-21065L with two 256kx16 SRAM connected as a 256kx32 SRAM. This system also has a 32-bit Host Port connected to a Motorola 32-bit Coldfire processor bus. I am able to boot using the Host Port as long as I don't use the external SRAM in my program. I've created a simple app that just turns on 4 LEDs connected to Flag lines to demonstrate boot completion. I can run the program without and with external SRAM using the Summit ICE BMD. I can upload the non-SRAM program using the Host Port and it works fine. When I load code into SRAM the program fails. I've compared the code loaded into internal memory (0x8000-) and external memory (0x20000-) and the external memory using the BMD by loading from the BMD and dumping memory and loading from the Host port and using the BMD to dump memory. The internal memory seems to be the same but the external memory is not correct. The problem seems to be some mismatch in packing but I don't know where I need to change it. Do I need to change it in the ADI host bootloader code? The bootloader seems to produce 16-bit words so it seems that it is expecting 16-bits at a time but how does the bootloader know how to pack the data in external SRAM? Any advice would be greatly appreciated.
ADSP-21065L Host Boot Problem.
Started by ●January 12, 2004
Reply by ●January 13, 20042004-01-13
You probably need to modify the bootloader kernel to setup for your sram correctly. The bootloader code isn't that convoluted (except the last bit of it) so you should be able to see where you can add whatever settings you need for the sram. ----- Ron Huizen BittWare "Steve Holle" <sholle@link-comm.com> wrote in message news:ba83847d.0401121519.6393558f@posting.google.com...> I'm so close I can taste it. Just one more step. > > We have a system comprised of an ADSP-21065L with two 256kx16 SRAM > connected as a 256kx32 SRAM. This system also has a 32-bit Host Port > connected to a Motorola 32-bit Coldfire processor bus. I am able to > boot using the Host Port as long as I don't use the external SRAM in > my program. I've created a simple app that just turns on 4 LEDs > connected to Flag lines to demonstrate boot completion. I can run the > program without and with external SRAM using the Summit ICE BMD. I > can upload the non-SRAM program using the Host Port and it works fine. > When I load code into SRAM the program fails. > > I've compared the code loaded into internal memory (0x8000-) and > external memory (0x20000-) and the external memory using the BMD by > loading from the BMD and dumping memory and loading from the Host port > and using the BMD to dump memory. The internal memory seems to be the > same but the external memory is not correct. The problem seems to be > some mismatch in packing but I don't know where I need to change it. > Do I need to change it in the ADI host bootloader code? The > bootloader seems to produce 16-bit words so it seems that it is > expecting 16-bits at a time but how does the bootloader know how to > pack the data in external SRAM? > > Any advice would be greatly appreciated.
Reply by ●January 13, 20042004-01-13
Hi Steve, Make sure you have TYPE(PM RAM) and WIDTH(48) at the line that describes the SRAM in the Memory section of your LDF file. Note: this is from a rather old project I worked on; the syntax may have changed. Hope this helps, -- Georgi "Steve Holle" <sholle@link-comm.com> wrote in message news:ba83847d.0401121519.6393558f@posting.google.com...> I'm so close I can taste it. Just one more step. > > We have a system comprised of an ADSP-21065L with two 256kx16 SRAM > connected as a 256kx32 SRAM. This system also has a 32-bit Host Port > connected to a Motorola 32-bit Coldfire processor bus. I am able to > boot using the Host Port as long as I don't use the external SRAM in > my program. I've created a simple app that just turns on 4 LEDs > connected to Flag lines to demonstrate boot completion. I can run the > program without and with external SRAM using the Summit ICE BMD. I > can upload the non-SRAM program using the Host Port and it works fine. > When I load code into SRAM the program fails. > > I've compared the code loaded into internal memory (0x8000-) and > external memory (0x20000-) and the external memory using the BMD by > loading from the BMD and dumping memory and loading from the Host port > and using the BMD to dump memory. The internal memory seems to be the > same but the external memory is not correct. The problem seems to be > some mismatch in packing but I don't know where I need to change it. > Do I need to change it in the ADI host bootloader code? The > bootloader seems to produce 16-bit words so it seems that it is > expecting 16-bits at a time but how does the bootloader know how to > pack the data in external SRAM? > > Any advice would be greatly appreciated.
Reply by ●January 14, 20042004-01-14
I finally got it to work with the help of many suggestions and code from ADI and this group. ADI supplied me with a modified bootloader and I had to upload the code with the bus width set to 16-bit in the SYSCON register. I also had to lower the timout value on the Loader to around 100 to prevent the Coldfire from generating a bus error. Thanks everyone for your help and suggestions.