News Item: Keil µVision extension DLL for simulating 7-segment LED displays
(Category: Rickeys World News)
Posted by ajay_bhargav
Sat Aug 08 2009, 10:31 am
Keil µVision extension DLL for simulating 7-segment LED displays
Enables simulation of multiple 7-segment LED display connected to any port (SFR) on 8051 uC
Picture shows peripherial dialog of 7-seg-LEDs in action.
One or more 7-seg LED displays constitute one or more led-groups. Here, two groups are configured: "Temperature:" and "Pressure:".
Inside each led-group, we can put variable number of separately configurable 7-seg LED displays.
7-seg-LEDs supports time-multiplexing. In this example, it drives five 7-seg LED diplays with 13 uC port-pins (8 for segments + 5 for common terminals).
Time-multiplexing support came from way that 7-seg-LEDs samples port-pins Pi.j on which 7-seg LED display pins are connected.
On each write to port-pin Pi.j, a new pair values of (pin-states, time) is pushed to cyclic buffer dedicated to hold last N pair values (pin-states, time). From that cyclic buffer, on each dialog update called from µVision simulator, the mean-ON-time for each segment is calculated. (dialog update is called from µVision simulator on each write to port-pins used by any segment-pin or commonTerminal-pin)
From that mean-ON-time, intensity of onColor for all affected segments are calculated and segments are repainted in real-time.
Link to sample screen-shoot picture
Documentation on "how to use?" can be found in pdf format inside or on Author's webpage
For any doubts you may use forum.
This news item is from Rickey's World of Microcontrollers & Microprocessors
( http://www.8051projects.net/news.php?extend.114 )
(Category: Rickeys World News)
Posted by ajay_bhargav
Sat Aug 08 2009, 10:31 am
Keil µVision extension DLL for simulating 7-segment LED displays
Enables simulation of multiple 7-segment LED display connected to any port (SFR) on 8051 uC
Picture shows peripherial dialog of 7-seg-LEDs in action.
One or more 7-seg LED displays constitute one or more led-groups. Here, two groups are configured: "Temperature:" and "Pressure:".
Inside each led-group, we can put variable number of separately configurable 7-seg LED displays.
7-seg-LEDs supports time-multiplexing. In this example, it drives five 7-seg LED diplays with 13 uC port-pins (8 for segments + 5 for common terminals).
Time-multiplexing support came from way that 7-seg-LEDs samples port-pins Pi.j on which 7-seg LED display pins are connected.
On each write to port-pin Pi.j, a new pair values of (pin-states, time) is pushed to cyclic buffer dedicated to hold last N pair values (pin-states, time). From that cyclic buffer, on each dialog update called from µVision simulator, the mean-ON-time for each segment is calculated. (dialog update is called from µVision simulator on each write to port-pins used by any segment-pin or commonTerminal-pin)
From that mean-ON-time, intensity of onColor for all affected segments are calculated and segments are repainted in real-time.
Link to sample screen-shoot picture
Documentation on "how to use?" can be found in pdf format inside or on Author's webpage
For any doubts you may use forum.
This news item is from Rickey's World of Microcontrollers & Microprocessors
( http://www.8051projects.net/news.php?extend.114 )