Thanks guys for yours different interesting note.
I'have some few update :
I succeed to figure out how to solve the error :
prussdrv_open() failed
The issue was that the function work like that :
int prussdrv_open(unsigned int host_interrupt)
{
char name[PRUSS_UIO_PRAM_PATH_LEN];
if (!prussdrv.fd[host_interrupt]) {
sprintf(name, "/dev/uio%d", host_interrupt);
prussdrv.fd[host_interrupt] = open(name, O_RDWR | O_SYNC);
return __prussdrv_memmap_init();
} else {
return -1;
}
}
So it was trying to load /dev/uio0 but when I look for it, it was not
there.
So I change to this dts :
https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-BONE-REPLICAP-00B1.dts
And it's succeed to create the /dev/uio0.
However, now I'm facing new issue when I'm trying to execute the different
programs :
root@beagle01:~/labs/bbb-pru/simple-tests# sudo ./major-tom-pru
[167188.892328] Unhandled fault: external abort on non-linefetch (0x1018)
at 0xb6da3000
[167188.900146] pgd = ddde8000
[167188.902965] [b6da3000] *pgd=9dc30831, *pte=4a304303, *ppte=4a304a33
root@beagle01:~/labs/exploringBB/chp13/fixedPRUClock# sudo ./fixedclock
[167484.486691] Unhandled fault: external abort on non-linefetch (0x1018)
at 0xb6e32000
[167484.494512] pgd = dcd78000
[167484.497330] [b6e32000] *pgd=9df94831, *pte=4a304303, *ppte=4a304a33
It's seem to appears when this function is launch :
int __pruss_detect_hw_version(unsigned int *pruss_io)
{
if (pruss_io[(AM18XX_INTC_PHYS_BASE - AM18XX_DATARAM0_PHYS_BASE) >> 2]
== AM18XX_PRUSS_INTC_REV)
return PRUSS_V1;
else {
if (pruss_io
[(AM33XX_INTC_PHYS_BASE - AM33XX_DATARAM0_PHYS_BASE) >> 2] ==
AM33XX_PRUSS_INTC_REV)
return PRUSS_V2;
else
return -1;
}
}
Especially On the first case of the if.
It was launch by :
prussdrv.pru0_dataram_base =
mmap(0, prussdrv.pruss_map_size, PROT_READ | PROT_WRITE,
MAP_SHARED, prussdrv.mmap_fd, PRUSS_UIO_MAP_OFFSET_PRUSS);
prussdrv.version =
__pruss_detect_hw_version(prussdrv.pru0_dataram_base);
So as before, if anyone have a clue on what's going wrong :-)
Thanks by advance
Regards
Vincent
>
> On Tuesday, April 5, 2016 at 10:22:36 AM UTC-5, Le Costaouec Vincent wrote:
>
>
> I forgot to indicate the release on which I'm working on :
> # lsb_release -da
>
> Distributor ID: Debian
> Description: Debian GNU/Linux 8.3 (jessie)
> Release: 8.3
> Codename: jessie
>
> Is anyone have already work on the PRU on this kernel version ?
> Thanks by advance.
> Regards.
> Vincent
>
>
> Le mardi 5 avril 2016 11:33:06 UTC+2, Le Costaouec Vincent a écrit :
>
> Hello,
>
> I'm currently trying to configure and use the PRU of the BBB.
>
> So I've tried two different method to do so however, with none of them I
> get succeed and I don't really
> understand why.
>
> 1) First method (from Derek Molloy book) :
>
> http://exploringbeaglebone.com/chapter13/
> So I have tried to do the PRU-based Clock Signal Generators, because this
> one
> do not required any additional material except an oscilloscope.
>
> So I had load the EBB-PRU-Example DTS overlay (provided in attachment),
> and I have receive the following message :
> # echo EBB-PRU-Example > $SLOTS
> [ 51.417438] bone_capemgr bone_capemgr: part_number 'EBB-PRU-Example',
> version 'N/A'
> [ 51.425297] bone_capemgr bone_capemgr: slot #4: override
> [ 51.430665] bone_capemgr bone_capemgr: Using override eeprom data at
> slot 4
> [ 51.437772] bone_capemgr bone_capemgr: slot #4: 'Override Board
> Name,00A0,Override Manuf,EBB-PRU-Example'
> [ 52.526058] gpio-of-helper ocp:gpio_helper: ready
> [ 52.531052] bone_capemgr bone_capemgr: slot #4: dtbo
> 'EBB-PRU-Example-00A0.dtbo' loaded; overlay id #0
>
>
>
> # cat $SLOTS
> 0: PF---- -1
> 1: PF---- -1
> 2: PF---- -1
> 3: PF---- -1
> 4: P-O-L- 0 Override Board Name,00A0,Override Manuf,EBB-PRU-Example
>
> I have also check :
> # lsmod |grep uio
> uio_pruss 4590 0
> uio_pdrv_genirq 3317 0
> uio 8319 2 uio_pruss,uio_pdrv_genirq
>
>
> root@beagle01:~/labs/exploringBB/chp13/fixedPRUClock# ./build
> PRU Assembler Version 0.86
> Copyright (C) 2005-2013 by Texas Instruments Inc.
> Pass 2 : 0 Error(s), 0 Warning(s)
> Writing Code Image of 12 word(s)
>
> # sudo ./fixedclock
> However, when I tried to monitor what append on pin P9_27 but I didn't
> observed anything on this pins.
>
>
>
>
> 2) Second method (from the Beagle bone black cookbook written by Charles A
> Hamilton) :
>
> This time, I have use this DTS : BB-BONE-PRU-01 (
> https://github.com/jadonk/cape-firmware/blob/master/arch/arm/boot/dts/BB-BONE-PRU-01-00A0.dts
> )
> In addition, I have tried to used this code :
> https://github.com/HudsonWerks/bbb-pru
>
> So first I tried to add the DTS, I received this message :
> # echo EBB-PRU-Exampecho BB-BONE-PRU-01 > $SLOTS
> [59800.649273] bone_capemgr bone_capemgr: part_number 'BB-BONE-PRU-01',
> version 'N/A'
> [59800.656947] bone_capemgr bone_capemgr: slot #12: override
> [59800.662528] bone_capemgr bone_capemgr: Using override eeprom data at
> slot 12
> [59800.669680] bone_capemgr bone_capemgr: slot #12: 'Override Board
> Name,00A0,Override Manuf,BB-BONE-PRU-01'
> [59800.699368] ------------[ cut here ]------------
> [59800.704089] WARNING: CPU: 0 PID: 619 at arch/arm/mach-omap2/omap_hwmod.
> c:2087 _enable+0x201/0x210()
> [59800.713188] omap_hwmod: pruss: enabled state can only be entered from
> initialized, idle, or disabled state
> [59800.722894] Modules linked in: uio_pruss usb_f_ecm g_ether usb_f_rndis
> u_ether libcomposite pvrsrvkm(O) omap_sham omap_aes snd_soc_davinci_mcasp
> snd_soc_edma snd_soc_omap omap_rng rng_core snd_soc_core snd_compress
> snd_pcm_dmaengine snd_pcm snd_timer snd soundcore evdev spi_omap2_mcspi
> uio_pdrv_genirq uio leds_gpio
> [59800.751252] CPU: 0 PID: 619 Comm: bash Tainted: G W O 4.1.19
> -bone20 #1
> [59800.758778] Hardware name: Generic AM33XX (Flattened Device Tree)
> [59800.764974] [<c0012f39>] (unwind_backtrace) from [<c00110a9>] (
> show_stack+0x11/0x14)
> [59800.772791] [<c00110a9>] (show_stack) from [<c002e5b7>] (
> warn_slowpath_common+
>
> ...
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