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Altera_Forum
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21 years ago

Flash Programmer Question

Can anybody explain to me does Altera Flash Programmer places boot loader automatically before main programm at flash for copying main program to sdram or not? Or I must write my own boot loader a...
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Altera_Forum
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21 years ago

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originally posted by wombat@Dec 8 2004, 06:00 AM

mir,

the .flash file should be a standard .srec file, and looks like one to me. see the boot-loader sources in components/altera_nios2/sdk/src/boot_loader_sources, particularly the comments in the .s file.

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Hi wombat,

thanks for your interest in my issue. Meanwhile I agree with you that .flash files are SREC files. My problem arose from comparing the .flash file produced by GUI flash programmer and the patterns I've got when reading the EPCS content in the running application.

Reading EPCS results in several 0xFFs followed by 0x56. A dump of the EPCS .flash file showed 0x6A as the first non FF byte. The miracle is: reading EPCS data shows content in reverse bit order:

0x56 = %01010110

0x6A = %01101010

((reading is done by 'alt_read_flash()')

regards

Mike