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| author | Paul Selkirk <pselkirk@isc.org> | 2014-09-03 10:07:59 -0400 |
|---|---|---|
| committer | Paul Selkirk <pselkirk@isc.org> | 2014-09-03 10:07:59 -0400 |
| commit | a768072bbe3ea9762ee3325ffb5c42c3156e7859 (patch) | |
| tree | 4ab6d3b54c75a3828c4fc00c6a2e06e0756f8936 /src/rtl/i2c_regs.v | |
| parent | d846f5ebdec82b4ae21e75e1da02db92f9bcd715 (diff) | |
fix i2c read buffer overrun
If a client requests data beyond the end of the coretest response,
i2c_core could wait forever for txd_syn to be asserted, locking up the
system. The current solution is to assume that data will be available
by the time the client sends the READ_CMD and then issues the i2c read
request; if no data is available, i2c_core returns 0x00. Given the
relative speeds of the i2c bus and the FPGA, this seems justifiable,
but it could use more scrutiny.
Diffstat (limited to 'src/rtl/i2c_regs.v')
0 files changed, 0 insertions, 0 deletions