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Altera_Forum's avatar
Altera_Forum
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20 years ago

compactflash test

I use the compactflash test code on the forum the main function first calls " IDE_initialize()" but when the programme run to "/* Enable IDE interrupts */ alt_irq_register(ide_irq, ...
Altera_Forum's avatar
Altera_Forum
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20 years ago

Hello liuxiaoping,

The behavior of the bsy bit should be discussed in the CompactFlash Association specification for CF cards; this operation occurs in the card and not in the (small) amount of FPGA logic that is used to communicate with the card. For my compact flash work, I obtained the specification directly from the source: http://www.compactflash.org/ (http://www.compactflash.org/)

About your question on the driver code: The initialization code should, when a card is inserted into the board, install interrupts for both control (ctl) and IDE (ide) slaves; if the IDE interrupt (ide_ieq) is not installed, the software will not function normally... so I think your modification is just masking a problem with the IDE interrupt not behaving correctly.