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Messages - OrrisD

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Character LCDs / Re: NHD-0420DZ-NSW-BBW want to ignore characters
« on: May 03, 2016, 09:47:59 PM »
The reason we want to keep the serial data constantly running is that the LCD is at the midpoint of a half-duplex data link.
Data comes from the host to a switch box that can send the switch configuration back to the host in between the host bytes.
We want the LCD to display status info. from the host, but NOT be affected by traffic from the host that is used to provide sync characters.  We run the LCD at 57,600 baud and send out a character from the host every millisecond. This gives plenty of time for the switch box to send back information to the host in between host outgoing traffic.  Host data is relatively infrequent, and the switch box loses track of time relative to the one millisecond ticks if its timer is not refreshed often enough.   We are presently sending a 0xFE,0x0F sequence as a filler and have found out that the LCD ignores it. 
The suggestion about unused memory space in the LCD is a good one. We'll try that next. Thanks.

Character LCDs / NHD-0420DZ-NSW-BBW want to ignore characters
« on: May 03, 2016, 02:50:19 PM »
We need to keep the serial data stream to the LCD active at all times,
even when there is no need to send information to the LCD.
We would like to send "filler" characters or sets of characters
between control sequences and displayable characters.
Is there a character series that is ignored by the LCD,
for example, would 0xFE, 0x00 work?

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