Charging the pyra


ljones

Member
Joined
Aug 12, 2006
Messages
220
Hello ! I've literally just received my pyra :) and apart from going through the setup procedure the first thing I decided to (after doing that) was to give the pyra a charge; the battery was getting a bit low on just 27%

I used a normal usb charger similar to this one and the first time I tried to chage the pyra the charger was saying that the current draw was around 2.7A - ! I immediately disconnected the pyra apon seeing this.

A bit worrying though since the port I'm using (the micro usb3/otg port) only supports up to 2.5A . I tried it again later on and it is now drawing around 1.7A . The battery does seem to be charging however. :)

I'm not sure why the pyra was trying to draw 2.7A - does that mean my pyra could already now be fried?

ljones
 

TrashyMG

Sarcasm Dispenser
Staff member
Joined
Jan 18, 2010
Messages
11,203
I need to read the specs on the charging IC, I don't have time now, but it's not uncommon for these kind of circuits to have a 3A current limits on the input side, it may be ignoring typical USB 3.0 OTG spec standards .
 

ljones

Member
Joined
Aug 12, 2006
Messages
220
Tried one more thing just in case btw: I did an apt update/upgrade as I also found that the pyra was reporting the wrong length of time to charge (the pyra at 80% was saying a little over 5 hours to charge the battery). After an apt update/upgrade this is a more reasonable 45 mins although I am seeing a kernel crash as the device boots up as well although maybe that is just a bug somewhere?

ljones
 

ljones

Member
Joined
Aug 12, 2006
Messages
220
If it helps anyone here's the kernel crash messages from dmesg. I don't know what this relates to though!

Code:
[    5.667615] ------------[ cut here ]------------
[    5.667620] WARNING: CPU: 0 PID: 59 at drivers/bus/omap_l3_noc.c:147 l3_interrupt_handler+0x254/0x374
[    5.667629] 44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4WAKEUP (Idle): Data Access in User mode during Functional access
[    5.667633] Modules linked in:
[    5.667646] CPU: 0 PID: 59 Comm: kworker/0:1 Not tainted 5.6.19-daveiii-pyradef-aufs #3
[    5.667646] Hardware name: Generic OMAP5 (Flattened Device Tree)
[    5.667646] Workqueue: events deferred_probe_work_func
[    5.667671] [<c0212e60>] (unwind_backtrace) from [<c020d1a0>] (show_stack+0x10/0x14)
[    5.667676] [<c020d1a0>] (show_stack) from [<c0c1b544>] (dump_stack+0x94/0xa8)
[    5.667676] [<c0c1b544>] (dump_stack) from [<c02351f0>] (__warn+0xd0/0xf8)
[    5.667689] [<c02351f0>] (__warn) from [<c02355e0>] (warn_slowpath_fmt+0x94/0xb8)
[    5.667703] [<c02355e0>] (warn_slowpath_fmt) from [<c064c23c>] (l3_interrupt_handler+0x254/0x374)
[    5.667707] [<c064c23c>] (l3_interrupt_handler) from [<c0290864>] (__handle_irq_event_percpu+0x58/0x29c)
[    5.667707] [<c0290864>] (__handle_irq_event_percpu) from [<c0290ad4>] (handle_irq_event_percpu+0x2c/0x80)
[    5.667712] [<c0290ad4>] (handle_irq_event_percpu) from [<c0290b60>] (handle_irq_event+0x38/0x5c)
[    5.667725] [<c0290b60>] (handle_irq_event) from [<c02950f4>] (handle_fasteoi_irq+0xb8/0x168)
[    5.667737] [<c02950f4>] (handle_fasteoi_irq) from [<c028fae4>] (generic_handle_irq+0x24/0x34)
[    5.667737] [<c028fae4>] (generic_handle_irq) from [<c02900b8>] (__handle_domain_irq+0x5c/0xb4)
[    5.667737] [<c02900b8>] (__handle_domain_irq) from [<c064a570>] (gic_handle_irq+0x3c/0x78)
[    5.667740] [<c064a570>] (gic_handle_irq) from [<c0201ab8>] (__irq_svc+0x58/0x8c)
[    5.667746] Exception stack(0xedab5830 to 0xedab5878)
[    5.667754] 5820:                                     ede8ba90 000c0113 fce10194 00000003
[    5.667763] 5840: cf1dde40 00000001 c1203fc8 cf1d4810 cf1ddec4 00000000 c0ca7668 00000000
[    5.667768] 5860: 00000194 edab5880 c077f224 c0c39984 200c0113 ffffffff
[    5.667768] [<c0201ab8>] (__irq_svc) from [<c0c39984>] (_raw_spin_unlock_irqrestore+0x1c/0x4c)
[    5.667768] [<c0c39984>] (_raw_spin_unlock_irqrestore) from [<c077f224>] (w677l_regulator+0x58/0x64)
[    5.667782] [<c077f224>] (w677l_regulator) from [<c077f5a8>] (w677l_enable+0xf8/0x3dc)
[    5.667797] [<c077f5a8>] (w677l_enable) from [<c0764768>] (omapdss_device_enable+0x20/0x34)
[    5.667798] [<c0764768>] (omapdss_device_enable) from [<c07829a4>] (omap_encoder_enable+0x40/0x80)
[    5.667798] [<c07829a4>] (omap_encoder_enable) from [<c072abc4>] (drm_atomic_helper_commit_modeset_enables+0x23c/0x268)
[    5.667813] [<c072abc4>] (drm_atomic_helper_commit_modeset_enables) from [<c078007c>] (omap_atomic_commit_tail+0x48/0xc0)
[    5.667825] [<c078007c>] (omap_atomic_commit_tail) from [<c072bcdc>] (commit_tail+0x9c/0x1b0)
[    5.667829] [<c072bcdc>] (commit_tail) from [<c072c8e0>] (drm_atomic_helper_commit+0x134/0x158)
[    5.667829] [<c072c8e0>] (drm_atomic_helper_commit) from [<c0759534>] (drm_client_modeset_commit_atomic+0x16c/0x210)
[    5.667833] [<c0759534>] (drm_client_modeset_commit_atomic) from [<c0759630>] (drm_client_modeset_commit_force+0x58/0x184)
[    5.667846] [<c0759630>] (drm_client_modeset_commit_force) from [<c0731024>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x54/0x98)
[    5.667858] [<c0731024>] (drm_fb_helper_restore_fbdev_mode_unlocked) from [<c0731098>] (drm_fb_helper_set_par+0x30/0x5c)
[    5.667860] [<c0731098>] (drm_fb_helper_set_par) from [<c06a4c4c>] (fbcon_init+0x3e0/0x578)
[    5.667860] [<c06a4c4c>] (fbcon_init) from [<c06f1c0c>] (visual_init+0xbc/0x104)
[    5.667869] [<c06f1c0c>] (visual_init) from [<c06f30ec>] (do_bind_con_driver+0x1e0/0x3bc)
[    5.667884] [<c06f30ec>] (do_bind_con_driver) from [<c06f3618>] (do_take_over_console+0x138/0x1d4)
[    5.667890] [<c06f3618>] (do_take_over_console) from [<c06a1334>] (do_fbcon_takeover+0x74/0xd4)
[    5.667890] [<c06a1334>] (do_fbcon_takeover) from [<c0698fa4>] (register_framebuffer+0x204/0x2dc)
[    5.667895] [<c0698fa4>] (register_framebuffer) from [<c0730b2c>] (__drm_fb_helper_initial_config_and_unlock+0x404/0x5ac)
[    5.667907] [<c0730b2c>] (__drm_fb_helper_initial_config_and_unlock) from [<c0788c00>] (omap_fbdev_init+0x8c/0xc4)
[    5.667919] [<c0788c00>] (omap_fbdev_init) from [<c07805e0>] (pdev_probe+0x4ec/0x788)
[    5.667921] [<c07805e0>] (pdev_probe) from [<c0795a74>] (platform_drv_probe+0x48/0x98)
[    5.667921] [<c0795a74>] (platform_drv_probe) from [<c079357c>] (really_probe+0x1c8/0x458)
[    5.667924] [<c079357c>] (really_probe) from [<c0793ac0>] (driver_probe_device+0x158/0x1b0)
[    5.667937] [<c0793ac0>] (driver_probe_device) from [<c07917c8>] (bus_for_each_drv+0x80/0xc4)
[    5.667950] [<c07917c8>] (bus_for_each_drv) from [<c0793320>] (__device_attach+0xd0/0x15c)
[    5.667951] [<c0793320>] (__device_attach) from [<c0792534>] (bus_probe_device+0x84/0x8c)
[    5.667951] [<c0792534>] (bus_probe_device) from [<c078ef0c>] (device_add+0x65c/0x798)
[    5.667952] [<c078ef0c>] (device_add) from [<c0795844>] (platform_device_add+0x130/0x23c)
[    5.667964] [<c0795844>] (platform_device_add) from [<c07963b4>] (platform_device_register_full+0xd0/0x110)
[    5.667975] [<c07963b4>] (platform_device_register_full) from [<c0765900>] (dss_bind+0x80/0xa8)
[    5.667982] [<c0765900>] (dss_bind) from [<c078c67c>] (try_to_bring_up_master+0x1ec/0x2a8)
[    5.667982] [<c078c67c>] (try_to_bring_up_master) from [<c078c7d4>] (__component_add+0x9c/0x168)
[    5.667982] [<c078c7d4>] (__component_add) from [<c077d0b0>] (hdmi5_probe+0x1ec/0x244)
[    5.667989] [<c077d0b0>] (hdmi5_probe) from [<c0795a74>] (platform_drv_probe+0x48/0x98)
[    5.667999] [<c0795a74>] (platform_drv_probe) from [<c079357c>] (really_probe+0x1c8/0x458)
[    5.668009] [<c079357c>] (really_probe) from [<c0793ac0>] (driver_probe_device+0x158/0x1b0)
[    5.668012] [<c0793ac0>] (driver_probe_device) from [<c07917c8>] (bus_for_each_drv+0x80/0xc4)
[    5.668012] [<c07917c8>] (bus_for_each_drv) from [<c0793320>] (__device_attach+0xd0/0x15c)
[    5.668012] [<c0793320>] (__device_attach) from [<c0792534>] (bus_probe_device+0x84/0x8c)
[    5.668020] [<c0792534>] (bus_probe_device) from [<c0792a60>] (deferred_probe_work_func+0x78/0xb8)
[    5.668033] [<c0792a60>] (deferred_probe_work_func) from [<c02510dc>] (process_one_work+0x22c/0x5c8)
[    5.668043] [<c02510dc>] (process_one_work) from [<c025170c>] (worker_thread+0x294/0x598)
[    5.668043] [<c025170c>] (worker_thread) from [<c0257a00>] (kthread+0x150/0x154)
[    5.668043] [<c0257a00>] (kthread) from [<c02010d8>] (ret_from_fork+0x14/0x3c)
[    5.668046] Exception stack(0xedab5fb0 to 0xedab5ff8)
[    5.668053] 5fa0:                                     00000000 00000000 00000000 00000000
[    5.668060] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    5.668067] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    5.668073] ---[ end trace 68f51d1ea18912d1 ]---

ljones
 

Binky

Death's Steed
Staff member
Joined
May 28, 2003
Messages
6,997
Location
16A (TO)
I need to read the specs on the charging IC, I don't have time now, but it's not uncommon for these kind of circuits to have a 3A current limits on the input side, it may be ignoring typical USB 3.0 OTG spec standards .
Perhaps it's trying to work out how much current the supply can really deliver, by ramping it up until the voltage drops off? I know at least some smartphones do that.
 
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