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https://elinux.org/index.php?title=RPI_vcgencmd_usage&diff=211226
RPI vcgencmd usage
2013-01-15T23:22:45Z
<p>Pac72: Reformatted; added command outputs; updated to firmware version 362371</p>
<hr />
<div>== Verified commands ==<br />
Command outputs are from [[firmware]] version '''<tt>362371</tt>'''.<br />
<br />
<br />
'''<code>vcgencmd commands</code>'''<br />
<br />
Shows a list of possible commands.<br />
<br />
root@raspberrypi:~# vcgencmd commands<br />
commands="vcos, ap_output_control, ap_output_post_processing, vchi_test_init, vchi_test_exit,<br />
pm_set_policy, pm_get_status, pm_show_stats, pm_start_logging, pm_stop_logging, version, commands,<br />
set_vll_dir, led_control, set_backlight, set_logging, get_lcd_info, set_bus_arbiter_mode,<br />
cache_flush, otp_dump, codec_enabled, measure_clock, measure_volts, measure_temp, get_config,<br />
hdmi_ntsc_freqs, render_bar, disk_notify, inuse_notify, sus_suspend, sus_status, sus_is_enabled,<br />
sus_stop_test_thread, egl_platform_switch, mem_validate, mem_oom, mem_reloc_stats, file,<br />
vctest_memmap, vctest_start, vctest_stop, vctest_set, vctest_get"<br />
<br />
<br />
'''<code>vcgencmd measure_clock ''<clock>''</code>'''<br />
<br />
Shows clock frequency, clock can be one of '''<tt>arm, core, h264, isp, v3d, uart, pwm, emmc, pixel, vec, hdmi, dpi</tt>'''.<br />
<br />
root@raspberrypi:~# \<br />
> for src in arm core h264 isp v3d uart pwm emmc pixel vec hdmi dpi ; do \<br />
> echo -e "$src:\t$(vcgencmd measure_clock $src)" ; \<br />
> done<br />
arm: frequency(45)=700000000<br />
core: frequency(1)=250000000<br />
h264: frequency(28)=0<br />
isp: frequency(42)=250000000<br />
v3d: frequency(43)=250000000<br />
uart: frequency(22)=3000000<br />
pwm: frequency(25)=0<br />
emmc: frequency(47)=100000000<br />
pixel: frequency(29)=154000000<br />
vec: frequency(10)=0<br />
hdmi: frequency(9)=163682000<br />
dpi: frequency(4)=0<br />
<br />
<br />
'''<code>vcgencmd measure_volts ''<id>''</code>'''<br />
<br />
Shows voltage. id can be one of '''<tt>core, sdram_c, sdram_i, sdram_p</tt>''', and defaults to '''<tt>core</tt>''' if not specified.<br />
<br />
root@raspberrypi:~# \<br />
> for id in core sdram_c sdram_i sdram_p ; do \<br />
> echo -e "$id:\t$(vcgencmd measure_volts $id)" ; \<br />
> done<br />
core: volt=1.20V<br />
sdram_c: volt=1.20V<br />
sdram_i: volt=1.20V<br />
sdram_p: volt=1.23V<br />
<br />
<br />
'''<code>vcgencmd measure_temp</code>'''<br />
<br />
Shows core temperature of BCM2835 SoC.<br />
<br />
root@raspberrypi:~# vcgencmd measure_temp<br />
temp=42.8'C<br />
<br />
<br />
'''<code>vcgencmd codec_enabled ''<codec>''</code>'''<br />
<br />
Shows if the specified codec is enabled, codec can be one of '''<tt>H264, MPG2, WVC1</tt>'''.<br />
<br />
root@raspberrypi:~# \<br />
> for codec in H264 MPG2 WVC1 ; do \<br />
> echo -e "$codec:\t$(vcgencmd codec_enabled $codec)" ; \<br />
> done<br />
H264: H264=enabled<br />
MPG2: MPG2=disabled<br />
WVC1: WVC1=disabled<br />
<br />
<br />
'''<code>vcgencmd version</code>'''<br />
<br />
Shows the firmware version<br />
<br />
root@raspberrypi:~# vcgencmd version<br />
Jan 13 2013 16:24:29<br />
Copyright (c) 2012 Broadcom<br />
version 362371 (release)<br />
<br />
<br />
Parameters and function of other commands are not known.</div>
Pac72