Re: [9fans] 9front on raspberry pi

[Chris McGee]

> On Nov 7, 2016, at 6:44 AM, arisawa  wrote:
> 
> by the way I said about raspi 1
>> the display size is 1920x1200.
>> when I try to resize a window, the mouse cursor flips and it is difficult to 
>> resize.
> This phenomenon was stopped when I connected lan cable.
> I don’t know the reason.

Interesting data point. Thank you. I tend to keep mine plugged into an active 
Ethernet switch. I'll try without to see if I can narrow down the problem.

> 
> I looked the source code and I guess for raspi 1:
> Plan9BCMpin
> GPIO01711
> GPIO11812
> GPIO22713
> GPIO32215
> GPIO42316
> GPIO52418
> GPIO62518
> GPIO7 4 7
> GPIO82824
> GPIO92921
> GPIO1030?
> GPIO1131?
> SDA 2 3
> SCL 3 5
> CE1 726
> CE0 824
> MISO 921
> MOSI1019
> SCLK1123
> TxD14 8
> RxD1510
> 
> and I tried some experiments.
> 
> (a) turn led light on/off that is connected to GPIO0 pin

Cool, good to know that part is working for others.

> 
> term% echo function out GPIO0 >ctl
> term% echo 1 > GPIO0
> term% echo 0 > GPIO0
> term% 
> 
> the result is OK.
> 
> (b) read GPIO1 status
> 
> term% echo function in GPIO1 >ctl
> 
> I expected:
> term% cat GPIO1# low voltage
> 0
> term%
> 
> however I have:
> term% cat GPIO1# low voltage
> 00...
> 
> I expected:
> term% cat GPIO1# high voltage
> 1
> term%
> 
> however I have:
> term% cat GPIO1
> 11...
> 
> is this a feature or bug?
> 

This part is inherited and merged in from original 9front source code. As we 
discussed before there seems to be no manual page. I'm not sure the intended 
behaviour and I have not yet tried reading from a gpio pin myself.

So in either case on the read it just repeats forever until interrupted?

Chris

Re: [9fans] 9front on raspberry pi

[arisawa]

Hello,

> 2016/11/07 8:29、Chris McGee  のメール：
> 
> Hi All,
> 
> I have cleaned up some of the concurrency code and USB. The new release is 
> here:
> https://github.com/sirnewton01/rpi-9front/releases/tag/nov2016-2
> 
> Thanks,
> Chris

many thanks, I will try.

by the way I said about raspi 1
> the display size is 1920x1200.
> when I try to resize a window, the mouse cursor flips and it is difficult to 
> resize.
This phenomenon was stopped when I connected lan cable.
I don’t know the reason.

I looked the source code and I guess for raspi 1:
Plan9   BCM pin
GPIO0   17  11
GPIO1   18  12
GPIO2   27  13
GPIO3   22  15
GPIO4   23  16
GPIO5   24  18
GPIO6   25  18
GPIO74   7
GPIO8   28  24
GPIO9   29  21
GPIO10  30  ?
GPIO11  31  ?
SDA  2   3
SCL  3   5
CE1  7  26
CE0  8  24
MISO 9  21
MOSI10  19
SCLK11  23
TxD 14   8
RxD 15  10

and I tried some experiments.

(a) turn led light on/off that is connected to GPIO0 pin

term% echo function out GPIO0 >ctl
term% echo 1 > GPIO0
term% echo 0 > GPIO0
term% 

the result is OK.

(b) read GPIO1 status

term% echo function in GPIO1 >ctl

I expected:
term% cat GPIO1 # low voltage
0
term%

however I have:
term% cat GPIO1 # low voltage
00...

I expected:
term% cat GPIO1 # high voltage
1
term%

however I have:
term% cat GPIO1
11...

is this a feature or bug?