User Tools

Site Tools



This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
hardwarerelated:raspberry_pi_4 [2019/08/31 01:43]
chris [first steps after booting]
hardwarerelated:raspberry_pi_4 [2019/09/19 00:43]
chris [using 2.9“ 296×128 ePaper Display Modue/SPI Interface]
Line 100: Line 100:
     * geekbench     * geekbench
-==== not working epaper: ​2.9“ 296×128 ePaper Display Modue/SPI Interface ==== +==== using 2.9“ 296×128 ePaper Display Modue/SPI Interface ==== 
-can not get any output from the device. After recompiling the demo-app with DEBUG, I get this:+My initial problem, ​did not get any output from the device. After recompiling the demo-app with DEBUG, I got this:
 <​code>​ <​code>​
 chris@raspberrypi:​~/​rpi/​RaspberryPi/​bcm2835 $ sudo ./epd  chris@raspberrypi:​~/​rpi/​RaspberryPi/​bcm2835 $ sudo ./epd 
Line 118: Line 118:
   * running raspi-config,​ to activate SPI   * running raspi-config,​ to activate SPI
   * https://​​wiki/​2.9inch_e-Paper_Module https://​​w/​upload/​9/​98/​2.9inch-e-paper-module-user-manual-en.pdf   * https://​​wiki/​2.9inch_e-Paper_Module https://​​w/​upload/​9/​98/​2.9inch-e-paper-module-user-manual-en.pdf
-  * one can also 'git clone https://​​waveshare/​e-Paper', edit RaspberryPi&​JetsonNano/​c/​main.c and then run '​epd'​, but I also do not get the epaper to display anything.+  * The code from the upstream git repo works for me: 
 +git clone https://​​waveshare/​e-Paper 
 +cd e-Paper/RaspberryPi&​JetsonNano/​c 
 +vi examples/main.c 
 +#   // EPD_2in9_test();​ 
 +#   // EPD_2in9bc_test();​ 
 +#   ​EPD_2in9d_test();​ 
 +and then run '​epd'​ 
 +sudo ./epd 
 +# this finally works for me 
 +==== further ==== 
 +  * [[http://​​|retroflag]] cases do not support raspi4 as of 2019-09
hardwarerelated/raspberry_pi_4.txt · Last modified: 2019/09/19 00:43 by chris