Bootloader delay - DSP56F807EVM

Txurfer — Fri, 23 Nov 2007 19:26:54 GMT

Hi all,

I´m programming a DSP56f807EVM with CW for 56800 r8.0 and I want to change Bootloader Delay time Dinamically. Could someone help me on this topic? I´m trying in several ways but It doesn´t work.

Thanks in advance for any advice.

David

Add p/n to subject.

Message Edited by NLFSJ on 2007-11-28 06:29 AM

Re: Bootloader delay - DSP56F807EVM

william_jiang — Fri, 30 Nov 2007 17:56:23 GMT

The linker command file should be changed. Below is the command lines required to support bootloader:

.ApplicationCode :
{

              F_Pcode_start_addr = .;

              #Serial bootloader configuration section
              WRITEH(0xE9C8);          # H/W RESET vector: JSR 0x0086 instruction opcode. Application code starts at the address
              WRITEH(0x0086);          # 0x0080 when serial bootloader support is enabled. JSR insctruction have
                                       # to be placed at address 0x0080.
              WRITEH(0xE9C8);          # COP RESET vector: JSR 0x0086 instruction opcode. Application code starts at the address
              WRITEH(0x0086);          # 0x0080 when serial bootloader support is enabled. JSR insctruction have
                                       # to be placed at address 0x0080.
              WRITEH(0);               # Dummy word
              #Bootloader start delay in seconds
              # In this case, it is 5s
              WRITEH(0xfe00+5);         # Bootloader start delay config word at address 0x0085. Possible values 0-255.

              # .text sections
              OBJECT (F_EntryPoint, Cpu.c) # The function _EntryPoint have to be placed at the beginning of the code
                                       # section for proper functionality of the serial bootloader.

...

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