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Тогда эти добрые ребята бутром зашьют. И только после этого будет доступна своя загрузка из бутрома.
Покупал бф532(лкфп) за $20 в апреле прошлого года, а бф533 в бга за $45 (или $40 точно не помню) в июне. Ревизия 0.2 у обоих.
Вот развлекался с некой Hiren (ad support group):
Типа Я. "For ROM-enabled devices, the boot ROM is always bypassed and execution begins from the lowest address on on-chip ROM (0xFFA00000)".
Earlier I expected to boot the processor by SPI serial PROM and so internal ROM was not used.
1) As I shall be able to boot the processor (ADSP-BF-532) without internal ROM?
2) What way is programmed internal ROM?
Hiren: 1) Without the internal ROM being programmed, you will still be able to boot the DSP from the external memory via the On-Chip Boot Rom.
2) The internal ROM is programmed in house. After you've debugged you application, you would send us the final code and Analog Devices would program the ROM for you.
Типа я не доехал:
But: "For ROM-enabled devices, the BOOT ROM IS ALWAYS BYPASSED and execution begins from the lowest address on on-chip ROM (0xFFA00000)".
Signifies on-chip ROM already contains boot ROM, which is started on
0xFFA00000?
Умная Hiren (поняла чего мне надо - я без всякой иронии): I think there's bit of confusion. The DSP has an on-chip ROM (located at 0xFFA0 0000) and an on-chip Boot ROM. If the DSP is not ROM-enabled, upon RESET the DSP jumps to the on-chip Boot ROM for booting. It boots code to location 0xFFA0 8000 and jumps there to begin code execution. When the DSP is
ROM-enabled, the DSP jumps to the on-chip ROM (0xFFA0 0000) for program execution after RESET. Again, the on-chip ROM is enabled in house. I hope this clears things up.
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