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4,440 Commits 3 Branches 6 Tags 32 MiB
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6 Commits

Author SHA1 Message Date
Kevin O'Connor 1b79ffcad2 lcd_st7920: Check CONFIG_MACH_AVR for slow mcus 
Use CONFIG_MACH_AVR instead of CONFIG_CLOCK_FREQ to check for slow
mcus.  Some fast MCUs do not export a high clock frequency.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
 2021-07-04 10:11:02 -04:00
Kevin O'Connor 473828ca6a command: Add command_decode_ptr() helper 
Add a helper function to convert from a string buffer passed in the
args[] parameter to an actual pointer.  This avoids all the callers
needing to perfrom pointer manipulation.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
 2020-10-30 14:04:08 -04:00
Kevin O'Connor 634dcc7387 lcd_hd44780: Only calibrate cmd_wait_ticks on mcus with strict timing 
The calibration isn't valid on the linux mcu, so make it dependent on
CONFIG_HAVE_STRICT_TIMING.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
 2020-05-31 14:57:06 -04:00
Kevin O'Connor 43dfb3c9ad lcd_hd44780: Minor change to timing delays 
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
 2019-11-26 09:49:43 -05:00
Kevin O'Connor fb485e862d lcd_hd44780: Add proper timing delays around gpio updates 
A fast micro-controller may update the gpio pins faster than the
hd44780 chip can handle.  Add in the appropriate delays.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
 2019-11-26 09:37:30 -05:00
Kevin O'Connor afc9bcf27b lcd_hd44780: Add micro-controller code for the HD44780 LCD chip 
Add support for passing messages to an HD44780 chip via a 4-bit
bit-banging interface.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
 2018-03-06 11:30:34 -05:00