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Hi all My application requires sending of the data after receiving RTS signal (either can be L-H or H-L).....i would like to know what all registers on blackfin will be help catch that signal......does anyone has any software code of that type...Would be very helpful in my application Thanks Rwgrads Sriram |
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Blackfin RS232
Started by ●October 28, 2003
Reply by ●October 28, 20032003-10-28
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--On Tuesday, October 28, 2003 7:11 PM +0000 sriram2480 <> wrote: > My application requires sending of the data after receiving RTS > signal (either can be L-H or H-L).....i would like to know what all > registers on blackfin will be help catch that signal. The Blackfin lacks hardware handshaking. RTS and CTS must be routed to bit I/O and sampled/set with software. If the inbound signal is off, you should disable the transmitter on the next transmit interrupt. If it's on and you have characters to send, you should enable the transmit interrupt. If the transmit interrupt is off, sample the signal in your background loop or timer interrupt handler. If it's on, sample it in your transmit interrupt handler as well. Because the handshake is handled by software, there will be latency from when it's asserted to when characters stop getting transmitted. The peer should assert the signal well before it runs out of buffer, to allow for that latency. |
