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Altera_Forum
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11 years ago

ELF download behaves differently than initialized hex

I have searched the archives but haven't turned up this problem. I have a NIOS II based system with some custom embedded peripherals, a JTAG UART (for debugging) and a non-JTAG UART (the system...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

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So the JTAG UART has some kind of handshaking in it? If nobody is listening, it will eventually block? That is good to know. Thanks. I never would have figured that out.

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This applies only if you use the "reduced device drivers" option in order to limit code footprint.

IIRC with the full driver version, there is not this problem.

This follows from the fact that in the first case jtag uart works in polled mode, while in the second one it is irq driven.