用vcgencmd获取树莓派硬件状态数据

#用vcgencmd获取树莓派硬件状态数据| 来源: 网络整理| 查看: 265

vcgencmd measure_temp

vcgencmd命令

显示可用的命令列表.

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"

vcgencmd measure_clock

显示时序, 可指定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

vcgencmd measure_volts

显示电压. id可以是core, sdram_c, sdram_i, sdram_p, 如不指定默认为core.

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

vcgencmd measure_temp

显示BCM2835芯片的温度.

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

vcgencmd codec_enabled

显示指定解码器是否可用, 解码器分别有H264, MPG2, WVC1, MPG4, MJPG, WMV9. 请注意MPG2和VC1是需要购买证书的.

root@raspberrypi:~# \ > for codec in H264 MPG2 WVC1 MPG4 MJPG WMV9 ; do \ > echo -e "$codec:\t$(vcgencmd codec_enabled $codec)" ; \ > done H264: H264=enabled MPG2: MPG2=enabled WVC1: WVC1=enabled MPG4: MPG4=enabled MJPG: MJPG=enabled WMV9: WMV9=enabled

如果你按照这篇帖子的内容设置了VP6和VP8 (WEBM)解码器, 虽然能正常工作, 但你要注意这只是实验, 你需要自行承担后果.

vcgencmd get_config [config|int|str]

显示你设置的配置参数. 参数可以是指定的参数名或者int, 用number-datatype参数显示全部配置, 用str参数以数据类型格式显示所有配置

vcgencmd get_config int arm_freq=1000 core_freq=500 sdram_freq=600 over_voltage=6 disable_overscan=1 force_pwm_open=1

vcgencmd get_mem arm/gpu

显示CPU和GPU分别占了多少内存.

root@raspberrypi:~# vcgencmd get_mem arm && vcgencmd get_mem gpu arm=448M gpu=64M

vcgencmd版本

显示固件版本

对于剩余其他命令的参数和功能还不大清楚.

更多这篇文章也列出一些vcgencmd选项

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