You are here: start » boards » bpi

Differences

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

--- boards:bpi [2023/10/10 00:06] – [Resources] darron
+++ boards:bpi [2023/11/05 17:41] (current) – [GPIO] darron
@@ Line 70: / Line 70: @@
 The above ribbon header numbering is for the Linux sysfs interface.
+Alternatively, a GPIO extension cable may present male pins as
+follows.
+<code>
+  ______________________________________________________
+ /                                                     /
++-----------------------------------------------------+
+|  0V 267 269 268  3V 273 274 275  0V 259  52  53  3V | 1
+|                                                     |
+|                                                     |
+| 270 266 272  0V 245 244  0V 226 225 224  0V  5V  5V |
++-------------------------___-------------------------+
+</code>
 === Pickle Microchip PIC ICSP ===
 Along with USB serial we can use the BPi GPIOs to program PICMicros using [[projects:pickle|Pickle Microchip PIC ICSP]].
-Memory mapped I/O can be used to drive the GPIOs, however, the [[projects:gpio-bb|GPIO bit-bang driver for Linux]] may also be utilised on the BPi if preferred.
+Install [[projects:gpio-bb|GPIO bit-bang driver for Linux]].
 == Low Voltage Programming with VPP at 3V3 ==
@@ Line 104: / Line 121: @@
 (R3..R6) 470R.
-DEVICE=BPI
- or
 DEVICE=GPIO-BB
-IFACCE=/dev/gpio-bb
+IFACE=/dev/gpio-bb
 </code>
+===Issues===
+Excessive CPU load can be seen in kernel process
+`events_freezable_power'
+This has been seen in Debian BOOKWORM and goes back
+some time.
+Add the following to rc.local to solve this
+<code>
+rmmod sun4i_gpadc sun4i_gpadc_iio
+</code>
+NB blacklisting doesn't appear to work.
 === Resources ===
+[[https://www.armbian.com/bananapi/|Armbian]]
 [[http://linux-sunxi.org/A20/PIO|A20 I/O ports]]

Differences

start

boards

advertisement

Toolbox