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target/cortex_m: remove dependency from jtag queue
Since the first commit 0988319 that introduced cortex_m, the code has a delay of 50ms after srst has been asserted. The specific delay is implemented through the JTAG_SLEEP command sent in the jtag queue. To remove the dependency from the jtag queue, replace the delay with a transport independent function. In case of jtag transport, this change keeps the same behaviour only if the jtag queue has been flushed before the delay. This does not happen if the call to dap_dp_init(), few lines above, fails while calling a dap_queue_dp_{read,write}(); in this case the jtag queue will be flushed later, after the delay, while in the original code the delay would follow the flushing of the commands already queued. Anyway, this different behavior would only happen in case of DAP already not responsive so anticipating the delay in such error condition is not supposed to add further problems. Change-Id: If15978246764e4266b10e707d86c03e5ed907de7 Signed-off-by: Antonio Borneo <[email protected]> Reviewed-on: http:https://openocd.zylin.com/4912 Tested-by: jenkins Reviewed-by: Tomas Vanek <[email protected]>
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