Update UART Example so that acknowledging RX data sets RX ready low. #593
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The UART example code currently sets `rx_rdy` high when data has been received. I had assumed that setting `rx_ack` to high would clear this until data is ready again, but in the existing implementation `rx_rdy` only goes low when new data arrives. This small diff changes `rx_ack` to clear `rx_rdy` so that a user can acknowledge data after the first byte and then wait on `rx_rdy` for the next one. I suppose this could've been design with the intent that the user strobes out a signal when `rx_rdy` goes from low to high, but I'm not sure what the use of `rx_ack` is if this was the intended design. Sorry if I'm being oblivious, but if I am, feel free to close out this diff.
Codecov Report
@@ Coverage Diff @@
## master #593 +/- ##
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Coverage 81.50% 81.50%
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Files 49 49
Lines 6461 6461
Branches 1287 1287
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Hits 5266 5266
Misses 1007 1007
Partials 188 188 Continue to review full report at Codecov.
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Lunaphied
approved these changes
Dec 11, 2021
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The UART example code currently sets
rx_rdyhigh when data has been received. I had assumed that settingrx_ackto high would clear this until data is ready again, but in the existing implementationrx_rdyonly goes low when new data arrives. This small diff changesrx_ackto clearrx_rdyso that a user can acknowledge data after the first byte and then waits onrx_rdyfor the next one. It also updates the simulation to verify that the right thing happens.I suppose this could've been designed with the intent that the user strobes out a signal when
rx_rdygoes from low to high, but I'm not sure what the use ofrx_ackis if this was the intended design. Sorry if I'm being oblivious, but if I am, feel free to close out this diff.