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2.11BSD operating system for microcontrollers
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majenko
PostPosted: Tue Dec 04, 2012 1:20 am 
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Pito wrote:
The RTC is an external I2C (PCF8563, 200nA) with a battery backup (CR1220) on the board.
The driver for that RTC is basically the same as for the DS1307 (the register's sequence differ a little bit). Drivers are available.
http://arduino.cc/playground/Main/RTC-PCF8563

Ah. I have used the DS1306 extensively (SPI version), but not the DS1307 yet. I don't think I actually have one here to experiment with ... Maybe I'll have to get on to Maxim to get some samples through.

I can use it to help develop the I²C driver.

----
OK, I have some DS1307+ chips on their way to me. I can't get samples of the PCF8563 as I don't have a direct purchase agreement with NXP.

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Pito
PostPosted: Tue Dec 04, 2012 1:36 am 
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PCF8563's driver is easy :)
What is needed is the I2C driver :roll:
http://www.linuxjournal.com/article/7136?page=0,0

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majenko
PostPosted: Tue Dec 04, 2012 12:16 pm 
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That's way too complex a system for li'l ol' RetroBSD.

I am planning something more akin to the spi bus system I wrote. We don't need (and can't really fit) run-time attaching / detaching of devices on a bus like that, so it will be down to the individual driver to open and configure the device on the bus at boot time, using abstracted management routines provided by the I²C bus driver.

I am thinking of having a device driver able to "probe" the I²C bus to find any devices it can deal with on that bus, rather than having it hard coded into the driver that device "X" is at address "Y". Not too sure how yet though.

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jaromir
PostPosted: Tue Dec 04, 2012 3:11 pm 
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majenko: DS1307 won't work at 3V. DS1337 is 3V version of DS1307. Interesting enought, other similar RTCs from maxim (DS1302, 1305, 1306) do work at both 5V and 3V. I got caught by this once.
If you want I may send you one spare PCF8563 with blank PCB :-)

Holes are 3m from outer corners of board, so coordinates are (3,3), (47,3), (3,47) and (47,47). Inner diamter of hole is 3,2mm, ready for standard M3 screws.

well, pinout table... yes. I'll do it.


pito:
I tried to put as much usable signals on connector as possible. PORTB is almost complete on this connector, so it may be usable as bus.

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wiz
PostPosted: Tue Dec 04, 2012 3:25 pm 
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Hi Jaromir and all,

Once we have the first PCBs, we will have the start of the RetroBSD standard bus :).

When we plug in whatever, RetroBSD will identify it, download the pseudo code stored on that device, (compile it?), link it in, power it up and everything will magically 'just' work :).

Lots of fun :).

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jaromir
PostPosted: Mon Dec 10, 2012 9:28 am 
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PCBs were shipped from China.
Now, we have to wait... 10 to 100 days :)

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wiz
PostPosted: Mon Dec 10, 2012 6:34 pm 
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Hi Jaromir,

Most cool :).

It appears Eagle disappeared from my system? "Feature" of free version?

Maybe I need to put it up on an isolated system?

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jaromir
PostPosted: Tue Dec 11, 2012 7:02 am 
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Disappeared?
I have Eagle installed on many computers a none of them disappeared without my action. Seems like PEBKAC problem :)

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wiz
PostPosted: Tue Dec 11, 2012 4:59 pm 
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Hi Jaromir,

I just noticed another curiosity. Different terminal windows show different contents in the same directory! Yikes. Probably time to upgrade Knoppix.

I remember starting Eagle. But /usr/bin/eagle is now nowhere to be found?

Dust off another box. Load recent Knoppix. Put on internal ethernet <- important!

Are we having fun yet?

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madscifi
PostPosted: Wed Dec 12, 2012 4:44 am 
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I'll probably be offline the week the boards show up at jaromir's, so I've checked in the SDRAM code and configuration for the ubw32-uart-sdram configuration in current. The pins used to connect to the sdram should match the board layout, and you'll want to reuse the linker script as well, although you may need to modify the starting flash address depending on what boot loader you end up using.

If anyone has plans to put an SDRAM on a ubw32 you'll want to use the older version of the code unless you want to remove the leds on the ubw32. I'll try to address this issue in the not too distant future (if someone else does not beat me to it, of course).
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jaromir
PostPosted: Thu Dec 13, 2012 8:52 am 
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I promised to make bottom connector pinout table. There is zip, containing pdf sheet

Quite messy layout, I must admit.


Attachments:
conn1.zip [19.18 KiB]
Downloaded 529 times

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wiz
PostPosted: Thu Dec 13, 2012 2:47 pm 
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Whoever complains can do the upgrade :).

Wiz
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Pito
PostPosted: Thu Dec 13, 2012 4:13 pm 
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hmm, I do prefer brighter colors :)
what I am missing on the first glance is SPI, hopefully is there somewhere..

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majenko
PostPosted: Thu Dec 13, 2012 4:26 pm 
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What is JP8 on the schematic in relation to the board?

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jaromir
PostPosted: Thu Dec 13, 2012 4:53 pm 
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majenko: JP8 is SPI channel shared with both micro-SD cards. It is located on right side, between bottom connector and battery. I'll update the pinout to include JP8 too.

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jaromir
PostPosted: Sun Dec 23, 2012 11:55 pm 
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Well,
I have preliminary hardware in my hands and I spent last 12 hours desperately trying to make it work. At first I took madscifi's /sys/pic32/ubw32-uart-sdram configuration to find out it is done for bootloader I don't have. So I tried to compile Microchip's AN1388 bootloader (in order to change it later, to adapt my hardware), spent solid few hours chasing linker errors / googling until I gave up.
So I tried to change this configuration to majenko's "baremetal" version, as I started to hate bootloaders. I wasn't successful. After flashing, there is absolutely nothing coming out from UART3 (tty2, AFAIK).
I didn't try to change SD card code (powering through PFET) for now, I just hoped to get anything on UART3.

Is there anybody helpful to modify ubw32-uart-sdram target to accomodate this hardware, please? Seems like I'm not up to the task :|
In fact, the only thing I need is to change tty to 2, oscillator uses 12MHz crystal, change indicator LEDs (A14, A15, C13, C14), SPI is SPI4, CS on RF3. RD12 needs to be brought to low level few hundreds of miliseconds before SD init and then forever.

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majenko
PostPosted: Mon Dec 24, 2012 2:01 am 
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Get the latest version of the code from svn, and use the config system to generate a correct bootloader.

Use something like the UBW as a template config file, and set the IO pins etc as you need them.

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jaromir
PostPosted: Mon Dec 24, 2012 3:46 am 
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Oh finally.
Code:
2.11 BSD Unix for PIC32, revision 859M build 2:
     Compiled 2012-12-24 by jarin@jarin:
     /home/jarin/retrobsd/sys/pic32/ubw32-uart-sdram
cpu: 795F512L 80 MHz, bus 80 MHz
oscillator: HS crystal, PLL div 1:3 mult x20
console: tty2 (5,2)
sd0: port SPI4, select pin F3
sdramp_preinit
PP Schema: (sdramp0:sa@2048,fs@14000)
Found partition on sdramp0 of type sa and size 2048
Found partition on sdramp0 of type fs and size 14000
sd0: no SD/MMC card detected
sd0: no SD/MMC card detected
No root filesystem available!
Please enter device to boot from (press ? to list):


No SD card for now.
Now where to make RD12 and RD13 to go into permanent low state after reset?

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vak
PostPosted: Mon Dec 24, 2012 5:40 am 
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jaromir wrote:
Now where to make RD12 and RD13 to go into permanent low state after reset?

Use bootloader options 'clear' and 'clear2':
Code:
device bootloader ... clear=D12 clear2=D13
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jaromir
PostPosted: Mon Dec 24, 2012 6:06 am 
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In DUINOMITE config file I found
Code:
device sd0 port=3 cs=D5 power=B13

and there is PFET on RB13 pin. I did similar thing
Quote:
device sd0 port=4 cs=F3 power=D12

and got further, but still no joy. There is 128MB micro SD card in first slot. I have to investigate more.
Code:
Compiled 2012-12-24 by jarin@jarin:
     /home/jarin/retrobsd/sys/pic32/ubw32-uart-sdram
cpu: 795F512L 80 MHz, bus 80 MHz
oscillator: HS crystal, PLL div 1:3 mult x20
console: tty2 (5,2)
sd0: port SPI4, select pin F3
sd1: port SPI4, select pin F8
sdramp_preinit
PP Schema: (sdramp0:sa@2048,fs@14000)
Found partition on sdramp0 of type sa and size 2048
Found partition on sdramp0 of type fs and size 14000
sd1: no SD/MMC card detected
sd1: no SD/MMC card detected
No root filesystem available!
Please enter device to boot from (press ? to list): ?
Disk: rd0: 124160 KB
sd1: no SD/MMC card detected
Disk: rd2: 16384 KB
Please enter device to boot from (press ? to list): rd0

sd0: type I, size 124160 kbytes, speed 13 Mbit/sec
phys mem  = 128 kbytes
user mem  = 96 kbytes
root dev  = rd0 (0,0)
root size = 111111 kbytes
Please enter swap device (press ? to list):
rd0swap dev  = rd0 (0,0)
swap size = 124160 kbytes
sd0: card_write: data rejected, reply = e0
sd0: card_read: READ_MULTIPLE timed out, reply = 255
************************************
*******STACK DUMP START*************
frame = 8000795c
stack data
        1 80006ec0        0 80006ec0
 80006f68 80000e38 80007ac0        0
 88bfe84e    1e500        0        3
        3       2a     6000        0
 80000ddc        0 10000000        6
 fffffffe 9d02445c 9d024458 bf800810
        0 80000000 800079e0 ffffffff
 9d00c96c        0        2 10000002
 9d0055f0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0 3c08bf88 35086000 240c2000
 340d8000 340ff000 24180100 ad1800e8
 3c18bf80 37180810 24020002 8f030000
   62082a 10200003        0        0
        0        0 ad0f01a4 ad0c01a8
        0        0 ad0c01a4 ad0d01a8
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0 240c0007 240d03fe
        0        0 ad0c0164 ad0d00e4
        0        0 240c0003 ad0c0168
        0        0 240c0008 ad0c00e8
        0        0 ad0f01a4        0
        0        0 ad0f01a8        0
        0        0        0        0
        0        0  3e00008        0
 3c08bf88 35086000 240f5000 3c18bf80
 37180810 24020002 8f030000   62082a
 10200003        0        0        0
        0 ad0f01ac        0        0
        0 ad0f01ac        0        0
        0        0        0        0
        0  3e00008        0 3c08bf88
 35086000 240c00ff 340fe000    46e02
 a10d0120 3c18bf80 37180810 24020002
 8f030000   62082a 10200003        0
        0        0        0 ad0f01ac
 ad0c0104    46c02        0 ad0f01ac
 a10d0120    46a02        0 a10d0120
        0        0        0 a1040120
    56e02        0        0 a10d0120
    56c02        0        0 a10d0120
    56a02        0        0 a10d0120
        0        0        0 a1050120
        0        0        0 ad0c0124
 ad0c0108  3e00008        0 3c08bf88
 35086000 240f6000 3c18bf80 37180810
 24020002 8f030000   62082a 10200003
        0        0        0        0
 ad0f01ac        0        0        0
 ad0f01ac        0        0        0
        0        0        0 91020110
        0        0        0 910d0110
    21200   4d1025        0 910d0110
    21200   4d1025        0 910d0110
    21200   4d1025        0 91030110
        0        0        0 910d0110
    31a00   6d1825        0 910d0110
    31a00   6d1825        0 910d0110
    31a00   6d1825  3e00008        0
 3c08bf88 35086000 240b0100 340cd000
 ad0b00e8 3c18bf80 37180810 24020002
 8f030000   62082a 10200003        0
        0        0        0 ad0c01ac
        0        0        0 ad0c01ac
        0        0        0  3e00008
        0 3c08bf88 35086000 240b0100
 340cd000 ad0b00e4 3c18bf80 37180810
 24020002 8f030000   62082a 10200003
        0        0        0        0
 ad0c01ac        0        0        0
 ad0c01ac        0        0        0
  3e00008        0 3c08bf88 35086000
 240c7000 3c18bf80 37180810 24020002
 8f030000   62082a 10200003        0
        0        0        0 ad0c01ac
        0        0        0 ad0c01ac
        0        0        0  3e00008
        0 3c08bf88 35086000 24090800
 240c7000 3c18bf80 37180810 24020002
 8f030000   62082a 10200003        0
        0        0        0 ad0c01ac
 ad0900e4        0        0 ad0c01ac
        0        0        0  3e00008
        0 3c08bf88 35086000 24090800
 3c18bf80 37180810 24020002 8f030000
   62082a 10200003        0        0
        0        0 ad0900e8        0
        0        0        0        0
        0        0        0        0
        0        0  3e00008        0
 5a2f65a3 2f496a71  9a9e588 2d1237a6
 531e5f6f 71133d29 bcde1e80 a66c1892
 d4119d86
*******STACK DUMP END***************
************************************

*** 0x9d0055f0: exception 'Bus load/store'
                t0 =        0   s0 =        0   t8 = bf800810   lo =        0
at =        1   t1 = 88bfe84e   s1 = 80000ddc   t9 =        0   hi =        2
v0 = 80006ec0   t2 =    1e500   s2 =        0               status = 10000002
v1 =        0   t3 =        0   s3 = 10000000                cause = 4080041c
a0 = 80006ec0   t4 =        3   s4 =        6   gp = 80000000  epc = 9d0055f0
a1 = 80006f68   t5 =        3   s5 = fffffffe   sp = 800079e0
a2 = 80000e38   t6 =       2a   s6 = 9d02445c   fp = ffffffff
a3 = 80007ac0   t7 =     6000   s7 = 9d024458   ra = 9d00c96c
panic: unexpected exception
syncing disks... ************************************
*******STACK DUMP START*************
frame = 8000776c
stack data
        1 80000000        1 9d00eaa0
 10000003        0        0        0
 88bfe84e    1e500        0        3
        3       2a     6000        0
 10000003        0 9d00eaa0        6
 fffffffe 9d02445c 9d024458 bf800810
        0 80000000 800077f0 ffffffff
 9d006b98        0        9 10000002
 9d007ab0        5        6 9d00630c
        0 9d00630c        0        0
        0 10000000 9d006b98 9d013650
        0 9d0063cc        0        0
        0       48 9d024e21        0
       48       48 9d0052bc 80007858
        0        0        0        1
 10000000     4000        0        5
        0        0        0 88bfe84e
    1e500        0        3        3
       2a     6000       48       48
        0 10000000        6 fffffffe
 9d02445c 9d024458 bf800810        0
 80000000 800078dc ffffffff 9d00ea9c
        0        9 10000003 9d00eaa0
 9d024e10       48        0 ffffffff
       48 80000ddc        0 10000000
        6 9d014288 9d0254f4 9d024150
        0 ffffffff 9d0242c4 9d006aac
        0        0        0        0
        0        0        0        0
        0        0 80000ddc 9d0052bc
 8000795c        0        0        0
        1 80006ec0        0 80006ec0
 80006f68 80000e38 80007ac0        0
 88bfe84e    1e500        0        3
        3       2a     6000        0
 80000ddc        0 10000000        6
 fffffffe 9d02445c 9d024458 bf800810
        0 80000000 800079e0 ffffffff
 9d00c96c        0        2 10000002
 9d0055f0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0 3c08bf88 35086000 240c2000
 340d8000 340ff000 24180100 ad1800e8
 3c18bf80 37180810 24020002 8f030000
   62082a 10200003        0        0
        0        0 ad0f01a4 ad0c01a8
        0        0 ad0c01a4 ad0d01a8
        0        0        0        0
        0        0        0        0
        0        0        0        0
        0        0 240c0007 240d03fe
        0        0 ad0c0164 ad0d00e4
        0        0 240c0003 ad0c0168
        0        0 240c0008 ad0c00e8
        0        0 ad0f01a4        0
        0        0 ad0f01a8        0
        0        0        0        0
        0        0  3e00008        0
 3c08bf88 35086000 240f5000 3c18bf80
 37180810 24020002 8f030000   62082a
 10200003        0        0        0
        0 ad0f01ac        0        0
        0 ad0f01ac        0        0
        0        0        0        0
        0  3e00008        0 3c08bf88
 35086000 240c00ff 340fe000    46e02
 a10d0120 3c18bf80 37180810 24020002
 8f030000   62082a 10200003        0
        0        0        0 ad0f01ac
 ad0c0104    46c02        0 ad0f01ac
 a10d0120    46a02        0 a10d0120
        0        0        0 a1040120
    56e02        0        0 a10d0120
    56c02        0        0 a10d0120
    56a02        0        0 a10d0120
        0        0        0 a1050120
        0        0        0 ad0c0124
 ad0c0108  3e00008        0 3c08bf88
 35086000 240f6000 3c18bf80 37180810
 24020002 8f030000   62082a 10200003
        0        0        0        0
 ad0f01ac        0        0        0
 ad0f01ac        0        0        0
        0        0        0 91020110
        0        0        0 910d0110
    21200   4d1025        0 910d0110
    21200   4d1025        0 910d0110
    21200   4d1025        0 91030110
        0        0        0 910d0110
    31a00   6d1825        0 910d0110
    31a00   6d1825        0 910d0110
    31a00   6d1825  3e00008        0
 3c08bf88 35086000 240b0100 340cd000
 ad0b00e8 3c18bf80 37180810 24020002
 8f030000   62082a 10200003        0
        0        0        0 ad0c01ac
        0        0        0 ad0c01ac
        0        0        0  3e00008
        0 3c08bf88 35086000 240b0100
 340cd000 ad0b00e4 3c18bf80 37180810
 24020002 8f030000   62082a 10200003
        0        0        0        0
 ad0c01ac        0        0        0
 ad0c01ac        0        0        0
  3e00008        0 3c08bf88 35086000
 240c7000 3c18bf80 37180810 24020002
 8f030000   62082a 10200003        0
        0        0        0 ad0c01ac
        0        0        0 ad0c01ac
        0        0        0  3e00008
        0 3c08bf88 35086000 24090800
 240c7000 3c18bf80 37180810 24020002
 8f030000   62082a 10200003        0
        0        0        0 ad0c01ac
 ad0900e4        0        0 ad0c01ac
        0        0        0  3e00008
        0 3c08bf88 35086000 24090800
 3c18bf80 37180810 24020002 8f030000
   62082a 10200003        0        0
        0        0 ad0900e8        0
        0        0        0        0
        0        0        0        0
        0        0  3e00008        0
 5a2f65a3 2f496a71  9a9e588 2d1237a6
 531e5f6f 71133d29 bcde1e80 a66c1892
 d4119d86
*******STACK DUMP END***************
************************************

*** 0x9d007ab0: exception 'Bus load/store'
                t0 =        0   s0 =        0   t8 = bf800810   lo =        0
at =        1   t1 = 88bfe84e   s1 = 10000003   t9 =        0   hi =        9
v0 = 80000000   t2 =    1e500   s2 =        0               status = 10000002
v1 =        1   t3 =        0   s3 = 9d00eaa0                cause = 5080041c
a0 = 9d00eaa0   t4 =        3   s4 =        6   gp = 80000000  epc = 9d007ab0
a1 = 10000003   t5 =        3   s5 = fffffffe   sp = 800077f0
a2 =        0   t6 =       2a   s6 = 9d02445c   fp = ffffffff
a3 =        0   t7 =     6000   s7 = 9d024458   ra = 9d006b98
panic: unexpected exception
halted


This is my config file
Code:
#
# UBW32 board
# ===========
#
# Console on UART3

core pic32mx7
linker bootloader-sdram
mapping generic

device kernel led=A15
device console led=A14 device=tty2
device uart3
device rdisk led=C13 swap=C14
device sd0 port=4 cs=F3 power=D12
device sd1 port=4 cs=F8 power=D13
device sdramp

option PARTITION=sdramp0:sa@2048,fs@14000

device bootloader button=B1 user=0x1d005000 led=E3 led2=E2 set=E0 set2=E1

I'm using custom built bootlodader, derived from original UBW32 sources.

_________________
http://jaromir.xf.cz/
https://hackaday.io/jaromir/
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