Difference: RaspiElfDisplay (7 vs. 8)

Revision 82018-05-19 - PeterSchmid

Line: 1 to 1
 
META TOPICPARENT name="WebHome"
%DASHBOARD{ section="banner"
Line: 14 to 14
 

Hardware

Changed:
<
<		TIL311 hexadecimal displays were to expensive for me 35 years ago and now they are not easy to get (and still expensive). The 4×7 rounded font looks far better than the seven-segment display especially the lower case hex display letters. But there is an alternative: LTP-305 from LITEON. They have no integrated driver, but the matrix LED driver IC IS31FL3730 can drive two of them. And better there is PCB HAT with 6 LTP-305 and 3 IS31FL3730 on it from Pimoroni ready for the Raspberry Pi. Four digits for the address and two digits for data!
>
>		TIL311 hexadecimal displays were to expensive for me 35 years ago and now they are not easy to get (and still expensive). The 4×7 rounded font looks far better than the seven-segment display especially the lower case hex display letters. But there is an alternative: LTP-305 from LITEON. They have no integrated driver, but the matrix LED driver IC IS31FL3730 can drive two of them. And better there is a PCB HAT with 6 LTP-305 and 3 IS31FL3730 on it from Pimoroni ready for the Raspberry Pi. Four digits for the address and two digits for data!
  |
til311.jpg
Enlarge
TIL311 Hexadecimal Display
|
LED module.jpg
Enlarge
LTP-305 Dot Matrix Display
Line: 28 to 28
 

Software for the Raspberry Pi

The Raspi controls the display through its I2C interface.
Changed:
<
<		I still want to use the 1802 Membership Card's Front Panel Card. That means I have to use the D-SUB connector. But there is no address bus on this connector, therefor the address is only known as long as the DMA (load mode) is used. The data bus is not available too, you will see the data in the load mode (DMA) and the output port (LEDs) during the run mode.
>
>		I still want to use the 1802 Membership Card's Front Panel Card. That means I have to use the D-SUB connector. But there is no address bus on this connector, therefore the address is only known as long as the DMA (load mode) is used. The data bus is neither available, you will see the data in the load mode (DMA) and the output port (LEDs) during the run mode.
  There is Python Library and Examples for Micro Dot pHAT on GitHub from Pimorini itself. But I prefer plain C and wrote my own hex display driver microdot_phat_hex.c
View topic | History: r13 < r12 < r11 < r10 | More topic actions...
 
This site is powered by the TWiki collaboration platform Powered by PerlCopyright © 2008-2025 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback