RPI vcgencmd usage

Verified commands
Command outputs are from firmware version 362371.

 

Shows a list of possible commands.

root@raspberrypi:~# vcgencmd commands commands="vcos, ap_output_control, ap_output_post_processing, vchi_test_init, vchi_test_exit, pm_set_policy, pm_get_status, pm_show_stats, pm_start_logging, pm_stop_logging, version, commands, set_vll_dir, led_control, set_backlight, set_logging, get_lcd_info, set_bus_arbiter_mode, cache_flush, otp_dump, codec_enabled, measure_clock, measure_volts, measure_temp, get_config, hdmi_ntsc_freqs, render_bar, disk_notify, inuse_notify, sus_suspend, sus_status, sus_is_enabled, sus_stop_test_thread, egl_platform_switch, mem_validate, mem_oom, mem_reloc_stats, file, vctest_memmap, vctest_start, vctest_stop, vctest_set, vctest_get"

 

Shows clock frequency, clock can be one of arm, core, h264, isp, v3d, uart, pwm, emmc, pixel, vec, hdmi, dpi.

root@raspberrypi:~# \ > for src in arm core h264 isp v3d uart pwm emmc pixel vec hdmi dpi ; do \ >    echo -e "$src:\t$(vcgencmd measure_clock $src)" ; \ > done arm:   frequency(45)=700000000 core:  frequency(1)=250000000 h264:  frequency(28)=0 isp:   frequency(42)=250000000 v3d:   frequency(43)=250000000 uart:  frequency(22)=3000000 pwm:   frequency(25)=0 emmc:  frequency(47)=100000000 pixel: frequency(29)=154000000 vec:   frequency(10)=0 hdmi:  frequency(9)=163682000 dpi:   frequency(4)=0

 

Shows voltage. id can be one of core, sdram_c, sdram_i, sdram_p, and defaults to core if not specified.

root@raspberrypi:~# \ > for id in core sdram_c sdram_i sdram_p ; do \ >    echo -e "$id:\t$(vcgencmd measure_volts $id)" ; \ > done core:  volt=1.20V sdram_c:       volt=1.20V sdram_i:       volt=1.20V sdram_p:       volt=1.23V

 

Shows core temperature of BCM2835 SoC.

root@raspberrypi:~# vcgencmd measure_temp temp=42.8'C

 

Shows if the specified codec is enabled, codec can be one of H264, MPG2, WVC1.

root@raspberrypi:~# \ > for codec in H264 MPG2 WVC1 ; do \ >    echo -e "$codec:\t$(vcgencmd codec_enabled $codec)" ; \ > done H264:  H264=enabled MPG2:  MPG2=disabled WVC1:  WVC1=disabled

 

Shows the firmware version

root@raspberrypi:~# vcgencmd version Jan 13 2013 16:24:29 Copyright (c) 2012 Broadcom version 362371 (release)

Parameters and function of other commands are not known.