No activity on the EPD screen

[yskkin]

I'm using Raspberri Pi 2 Model B and 2.7" EPD.

compilation goes fine, epd-fuse service is running and /dev/epd is mounted but demo/DrawDemo.py and other demo codes do not show anything on the screen.

I checked this FAQ page and tried both of make PANEL_VERSION=V230_G2 rpi and make PANEL_VERSION=V231_G2 rpi. Neither of them work.

output of uname -a is

Linux raspberrypi 3.18.13-v7+ #785 SMP PREEMPT Mon May 18 17:53:02 BST 2015 armv7l GNU/Linux

[yskkin]

I can run epd_test with the following modification.

diff --git a/PlatformWithOS/RaspberryPi/gpio.c b/PlatformWithOS/RaspberryPi/gpio.c
index 2048a4f..36128b4 100644
--- a/PlatformWithOS/RaspberryPi/gpio.c
+++ b/PlatformWithOS/RaspberryPi/gpio.c
@@ -34,7 +34,7 @@

 // register addresses in Rasberry PI
 enum {
-       BCM_PERIPERALS_ADDRESS = 0x20000000,
+       BCM_PERIPERALS_ADDRESS = 0x3F000000,
        GPIO_REGISTERS         = 0x00200000,
        PWM_REGISTERS          = 0x0020C000,
        CLOCK_REGISTERS        = 0x00101000,

epd_test can run with both of PANEL_VERSION=V230_G2 and PANEL_VERSION=V231_G2 epd-fuse can run with PANEL_VERSION=V231_G2

[hxw]

I did not try any testing with B2, and only recently have one. I Thought that changing the base address should be sufficient. So the program works correctly with this change?

Any Idea if this can be determined at run time? (read /proc/cpuinfo perhaps)

[hxw]

fix applied: 08e936eee1d