I have installed RPI Linux Installer of Teensyduino on an RPI previously.
I simply took the teensy loader code and copied it from the RPI to the OPI, and tested it.
The testing was not extensive, but the software did run, so I expect I will be able to use the teensy loader to upgrade Teensies in the field with an OPI if necessary.
I followed my own ‘setup’ procedure with my new OPI. This includes building standard users, installing software I always use (FTP, SMTP, etc), and so on.
This gave me a chance to see what kind of issues I might have running Raspbian on OPI.
For the most part, I only saw a few problems. Unfortunately, they have all been somewhat nasty problems that took some time to resolve.
That being said, most everything works. As I was doing research, users were complaining bitterly about how unstable / unusable Raspian on OPI is. So far my opinion is nowhere near as negative. BUT I will also say this implementation of Raspian obviously doesn’t have the same kind of attention to detail that one would find on Raspberry Pi.
Here are the issues I have seen:
HDMI to DVI Converter
As mentioned in Orange PI One Installation, you really shouldn’t plan on using a DVI monitor. You might get it to work, you might not.
raspi-config Can’t Expand the File System
Everything I normally use raspi-config for (keyboard config, timezone, enable SSH) works EXCEPT it can’t expand the file system.
I did this by sticking the SD card into another system running linux and used gparted to resize the partition.
Can’t Use New Users
This was almost a show stopper: after creating my ‘standard’ users, I found I could not log into them. Well, I could login, but they would immediately exit / logoff.
This one took a few hours to track down. Not the kind of bug you would think would make it past QA. It’s been around a while and evidently it still isn’t fixed in the distribution.
This is corrected by tweaking the running configuration with:
echo "vm.mmap_min_addr = 4096" > /etc/sysctl.d/mmap_min_addr.conf
mmap_miin_addr.conf which will be executed each time the system is started.
VNC Install
This is more a warning than an error.
After installing VNC and trying to run tightvncserver for the first time I got an error regarding missing .Xauthority file and the server didn’t work correctly.
I restarted the service. This time there was no error, and it did work. Yay!
CPU(s) Shut Down Due to Heat
While trolling syslog, I discovered constant error messages regarding “CPU Budget: Temperature”.
I started looking around and others were complaining about this and about their CPU(s) being shutdown due to excessive heat.
Looking close in my log, sure enough, I found my CPU3 was being shutdown as well:
Sep 5 15:43:30 opi kernel: [ 4.920061] CPU Budget: Temperature: 73 Limit state:1 item[1200000,3,-1,0 0] Sep 5 15:43:30 opi kernel: [ 4.920072] CPU Budget:Try to down cpu 3, cluster0 online 4, limit 3 Sep 5 15:43:30 opi kernel: [ 4.956805] CPU3: shutdown Sep 5 15:43:30 opi kernel: [ 4.963550] [hotplug]: cpu(0) try to kill cpu(3) Sep 5 15:43:30 opi kernel: [ 4.972376] [hotplug]: cpu3 is killed! .
Running top and using option ‘1’, sure enough, I only had 3 CPUs running.
I started researching this problem and found people talking about changing frequency, etc, etc. I was wary about making such changes. They also said you should be using a heatsink.
Well, I am using a heat sink so I checked the case and it seemed pretty warm to me.
I removed the OPI from the case and restarted it. So far no error messages in syslog.
This problem isn’t actually the fault of the OPI, but the case mfg whom didn’t do an adequate job of ventilation.
Sep 11, 2017 Update
I was given a copy of armbian to play with. It was much better setup to handle the Orange Pi, but the copy I had still had some issues, so I went over to Ambian and downloaded the latest version of Ubunutu Desktop for Armbian at https://www.armbian.com/download/ .
This is much slicker than Raspian. I’d recommend it over Raspian for the most part. I’m not going to use it, at least for now, mainly because I have a ton of RPI’s running on Raspian right now and I want to keep everything consistent.
One big benefit of Armbian is it doesn’t experience the CPU shutdown issue due to over heating.
After pondering that difference, I decided the hardware is the hardware, there must be a difference in how Armbian is configured vs. Raspian.
I ended up copying bits and pieces of /boot/script.fex (aka script.bin) from Armbian to Raspian. Essentially, I now allow the CPU to get a little hotter, plus I think I am allowing the CPU frequency to drop either quicker or further (or maybe both).
Enclosed is the script.fex I’m using that no longer has the CPU shutdown issue. You will need to convert this to script.bin using the fex2bin tool.
USE AT YOUR OWN RISK. I just copied and pasted values I thought might help. There may be some weird side effect that causes the CPU to burst into flames. I don’t know – these changes are way outside the scope of my Linux knowledge!
[product] version = "100" machine = "Xunlong Orange Pi One" [platform] debug_mode = 1 eraseflag = 1 next_work = 2 [target] boot_clock = 1008 storage_type = -1 [key_detect_en] keyen_flag = 0 [fel_key] fel_key_max = 7 fel_key_min = 2 [card_boot] logical_start = 40960 sprite_work_delay = 500 sprite_err_delay = 200 sprite_gpio0 = port:PL10<1><default><default><default> next_work = 3 [box_start_os] used = 1 start_type = 1 irkey_used = 1 pmukey_used = 1 pmukey_num = 3 led_power = 0 led_state = 0 [boot_init_gpio] used = 1 gpio0 = port:PL10<1><default><default><1> gpio1 = port:PG11<1><default><default><1> [recovery_para] used = 1 mode = 2 recovery_key = port:PL04<0><default><default><default> [pm_para] standby_mode = 1 [card0_boot_para] card_ctrl = 0 card_high_speed = 1 card_line = 4 sdc_d1 = port:PF00<2><1><2><default> sdc_d0 = port:PF01<2><1><2><default> sdc_clk = port:PF02<2><1><2><default> sdc_cmd = port:PF03<2><1><2><default> sdc_d3 = port:PF04<2><1><2><default> sdc_d2 = port:PF05<2><1><2><default> [card2_boot_para] card_ctrl = 2 card_high_speed = 1 card_line = 8 sdc_cmd = port:PC06<3><1><2><default> sdc_clk = port:PC05<3><1><2><default> sdc_d0 = port:PC08<3><1><2><default> sdc_d1 = port:PC09<3><1><2><default> sdc_d2 = port:PC10<3><1><2><default> sdc_d3 = port:PC11<3><1><2><default> sdc_d4 = port:PC12<3><1><2><default> sdc_d5 = port:PC13<3><1><2><default> sdc_d6 = port:PC14<3><1><2><default> sdc_d7 = port:PC15<3><1><2><default> sdc_2xmode = 1 sdc_ddrmode = 1 [twi_para] twi_port = 0 twi_scl = port:PA11<2><default><default><default> twi_sda = port:PA12<2><default><default><default> [uart_para] uart_debug_port = 0 uart_debug_tx = port:PA04<2><1><default><default> uart_debug_rx = port:PA05<2><1><default><default> [force_uart_para] force_uart_port = 0 force_uart_tx = port:PF02<3><1><default><default> force_uart_rx = port:PF04<3><1><default><default> [jtag_para] jtag_enable = 0 jtag_ms = port:PA00<3><default><default><default> jtag_ck = port:PA01<3><default><default><default> jtag_do = port:PA02<3><default><default><default> jtag_di = port:PA03<3><default><default><default> [clock] pll_video = 297 pll_ve = 402 pll_periph0 = 600 pll_gpu = 576 pll_periph1 = 600 pll_de = 864 [dram_para] dram_clk = 624 dram_type = 3 dram_zq = 0x3b3bfb dram_odt_en = 1 dram_para1 = 283377664 dram_para2 = 0 dram_mr0 = 6208 dram_mr1 = 64 dram_mr2 = 24 dram_mr3 = 2 dram_tpr0 = 0x48a192 dram_tpr1 = 0x1c2418d dram_tpr2 = 0x76051 dram_tpr3 = 0x0 dram_tpr4 = 0x0 dram_tpr5 = 0x0 dram_tpr6 = 0x64 dram_tpr7 = 0x0 dram_tpr8 = 0x0 dram_tpr9 = 0x0 dram_tpr10 = 0x0 dram_tpr11 = 0x6aaa0000 dram_tpr12 = 0x7979 dram_tpr13 = 0x800800 [wakeup_src_para] cpu_en = 0 cpu_freq = 48 pll_ratio = 273 dram_selfresh_en = 1 dram_freq = 36 wakeup_src0 = wakeup_src_wl = port:PG10<4><default><default><0> wakeup_src_bt = port:PL03<6><default><default><0> [twi0] twi_used = 1 twi_scl = port:PA11<2><default><default><default> twi_sda = port:PA12<2><default><default><default> [twi1] twi_used = 1 twi_scl = port:PA18<3><default><default><default> twi_sda = port:PA19<3><default><default><default> [twi2] twi_used = 0 twi_scl = port:PE12<3><default><default><default> twi_sda = port:PE13<3><default><default><default> [uart0] uart_used = 1 uart_port = 0 uart_type = 2 uart_tx = port:PA04<2><1><default><default> uart_rx = port:PA05<2><1><default><default> [uart1] uart_used = 0 uart_port = 1 uart_type = 4 uart_tx = port:PG06<2><1><default><default> uart_rx = port:PG07<2><1><default><default> uart_rts = port:PG08<2><1><default><default> uart_cts = port:PG09<2><1><default><default> [uart2] uart_used = 0 uart_port = 2 uart_type = 4 uart_tx = port:PA00<2><1><default><default> uart_rx = port:PA01<2><1><default><default> uart_rts = port:PA02<2><1><default><default> uart_cts = port:PA03<2><1><default><default> [uart3] uart_used = 0 uart_port = 3 uart_type = 4 uart_tx = port:PA13<3><1><default><default> uart_rx = port:PA14<3><1><default><default> uart_rts = port:PA15<3><1><default><default> uart_cts = port:PA16<3><1><default><default> [spi0] spi_used = 1 spi_cs_bitmap = 1 spi_mosi = port:PC00<3><default><default><default> spi_miso = port:PC01<3><default><default><default> spi_sclk = port:PC02<3><default><default><default> spi_cs0 = port:PC03<3><1><default><default> [spi1] spi_used = 0 spi_cs_bitmap = 1 spi_cs0 = port:PA13<2><1><default><default> spi_sclk = port:PA14<2><default><default><default> spi_mosi = port:PA15<2><default><default><default> spi_miso = port:PA16<2><default><default><default> [spi_devices] spi_dev_num = 1 [spi_board0] modalias = "spidev" max_speed_hz = 33000000 bus_num = 0 chip_select = 0 mode = 0 full_duplex = 1 manual_cs = 0 [gpio_para] gpio_used = 0 gpio_num = 0 [leds_para] leds_used = 1 green_led = port:PL10<1><default><default><1> green_led_active_low = 0 red_led = port:PA15<1><default><default><0> red_led_active_low = 0 [ths_para] ths_used = 1 ths_trip1_count = 6 ths_trip1_0 = 75 ths_trip1_1 = 80 ths_trip1_2 = 85 ths_trip1_3 = 90 ths_trip1_4 = 95 ths_trip1_5 = 105 ths_trip1_6 = 0 ths_trip1_7 = 0 ths_trip1_0_min = 0 ths_trip1_0_max = 1 ths_trip1_1_min = 1 ths_trip1_1_max = 2 ths_trip1_2_min = 2 ths_trip1_2_max = 3 ths_trip1_3_min = 3 ths_trip1_3_max = 4 ths_trip1_4_min = 4 ths_trip1_4_max = 5 ths_trip1_5_min = 5 ths_trip1_5_max = 7 ths_trip1_6_min = 0 ths_trip1_6_max = 0 ths_trip2_count = 1 ths_trip2_0 = 105 [cooler_table] cooler_count = 8 cooler0 = "1200000 4 4294967295 0" cooler1 = "912000 4 4294967295 0" cooler2 = "768000 4 4294967295 0" cooler3 = "648000 4 4294967295 0" cooler4 = "480000 4 4294967295 0" cooler5 = "480000 3 4294967295 0" cooler6 = "480000 2 4294967295 0" cooler7 = "480000 1 4294967295 0" [nand0_para] nand_support_2ch = 0 nand0_used = 0 nand0_we = port:PC00<2><default><default><default> nand0_ale = port:PC01<2><default><default><default> nand0_cle = port:PC02<2><default><default><default> nand0_ce1 = port:PC03<2><default><default><default> nand0_ce0 = port:PC04<2><default><default><default> nand0_nre = port:PC05<2><default><default><default> nand0_rb0 = port:PC06<2><default><default><default> nand0_rb1 = port:PC07<2><default><default><default> nand0_d0 = port:PC08<2><default><default><default> nand0_d1 = port:PC09<2><default><default><default> nand0_d2 = port:PC10<2><default><default><default> nand0_d3 = port:PC11<2><default><default><default> nand0_d4 = port:PC12<2><default><default><default> nand0_d5 = port:PC13<2><default><default><default> nand0_d6 = port:PC14<2><default><default><default> nand0_d7 = port:PC15<2><default><default><default> nand0_ndqs = port:PC16<2><default><default><default> [boot_disp] advert_disp = 0 auto_hpd = 1 output_type = 4 hdmi_channel = 0 hdmi_mode = 4 cvbs_channel = 1 cvbs_mode = 11 output_full = 1 hdmi_mode_check = 1 [disp_init] disp_init_enable = 1 disp_mode = 0 screen0_output_type = 3 screen0_output_mode = 10 screen1_output_type = 3 screen1_output_mode = 10 fb0_format = 0 fb0_width = 0 fb0_height = 0 fb1_format = 0 fb1_width = 0 fb1_height = 0 hdcp_enable = 0 hdmi_cts_compatibility = 1 [hdmi_para] hdmi_used = 1 hdmi_power = "vcc-hdmi-18" hdcp_enable = 0 hdmi_cts_compatibility = 1 [tv_para] tv_used = 0 tv_dac_used = 1 tv_dac_src0 = 0 [pwm0_para] pwm_used = 0 pwm_positive = port:PA05<3><0><default><default> [gmac0] gmac_used = 2 gmac_power1 = [csi0] vip_used = 1 vip_mode = 0 vip_dev_qty = 1 vip_define_sensor_list = 0 vip_csi_pck = port:PE00<2><default><default><default> vip_csi_mck = port:PE01<2><default><default><default> vip_csi_hsync = port:PE02<2><default><default><default> vip_csi_vsync = port:PE03<2><default><default><default> vip_csi_d0 = port:PE04<2><default><default><default> vip_csi_d1 = port:PE05<2><default><default><default> vip_csi_d2 = port:PE06<2><default><default><default> vip_csi_d3 = port:PE07<2><default><default><default> vip_csi_d4 = port:PE08<2><default><default><default> vip_csi_d5 = port:PE09<2><default><default><default> vip_csi_d6 = port:PE10<2><default><default><default> vip_csi_d7 = port:PE11<2><default><default><default> vip_csi_sck = port:PE12<2><default><default><default> vip_csi_sda = port:PE13<2><default><default><default> vip_dev0_mname = "gc2035" vip_dev0_pos = "front" vip_dev0_lane = 1 vip_dev0_twi_id = 2 vip_dev0_twi_addr = 120 vip_dev0_isp_used = 0 vip_dev0_fmt = 0 vip_dev0_stby_mode = 0 vip_dev0_vflip = 1 vip_dev0_hflip = 1 vip_dev0_iovdd = "" vip_dev0_iovdd_vol = 2800000 vip_dev0_avdd = "" vip_dev0_avdd_vol = 2800000 vip_dev0_dvdd = "" vip_dev0_dvdd_vol = 1800000 vip_dev0_afvdd = "" vip_dev0_afvdd_vol = 2800000 vip_dev0_power_en = port:PA17<1><default><default><1> vip_dev0_reset = port:PE14<1><default><default><1> vip_dev0_pwdn = port:PE15<1><default><default><0> vip_dev0_flash_en = vip_dev0_flash_mode = vip_dev0_af_pwdn = vip_dev0_act_used = 0 vip_dev0_act_name = "ad5820_act" vip_dev0_act_slave = 24 vip_dev1_mname = "" vip_dev1_pos = "rear" vip_dev1_lane = 1 vip_dev1_twi_id = 0 vip_dev1_twi_addr = vip_dev1_isp_used = 0 vip_dev1_fmt = 1 vip_dev1_stby_mode = 0 vip_dev1_vflip = 0 vip_dev1_hflip = 0 vip_dev1_iovdd = "" vip_dev1_iovdd_vol = 2800000 vip_dev1_avdd = "" vip_dev1_avdd_vol = 2800000 vip_dev1_dvdd = "" vip_dev1_dvdd_vol = 1500000 vip_dev1_afvdd = "" vip_dev1_afvdd_vol = 2800000 vip_dev1_power_en = vip_dev1_reset = vip_dev1_pwdn = vip_dev1_flash_en = vip_dev1_flash_mode = vip_dev1_af_pwdn = [tvout_para] tvout_used = 0 tvout_channel_num = tv_en = 0 [tvin_para] tvin_used = 0 tvin_channel_num = [di_para] di_used = 1 [mmc0_para] sdc_used = 1 sdc_detmode = 3 sdc_buswidth = 4 sdc_clk = port:PF02<2><1><2><default> sdc_cmd = port:PF03<2><1><2><default> sdc_d0 = port:PF01<2><1><2><default> sdc_d1 = port:PF00<2><1><2><default> sdc_d2 = port:PF05<2><1><2><default> sdc_d3 = port:PF04<2><1><2><default> sdc_det = port:PF06<0><1><2><default> sdc_use_wp = 0 sdc_wp = sdc_isio = 0 sdc_regulator = "none" sdc_power_supply = "none" [mmc1_para] sdc_used = 1 sdc_detmode = 4 sdc_buswidth = 4 sdc_clk = port:PG00<2><1><3><default> sdc_cmd = port:PG01<2><1><3><default> sdc_d0 = port:PG02<2><1><3><default> sdc_d1 = port:PG03<2><1><3><default> sdc_d2 = port:PG04<2><1><3><default> sdc_d3 = port:PG05<2><1><3><default> sdc_det = sdc_use_wp = 0 sdc_wp = sdc_isio = 1 sdc_regulator = "none" sdc_power_supply = "none" sdc_2xmode = 1 sdc_ddrmode = 1 [mmc2_para] sdc_used = 0 sdc_detmode = 3 sdc_buswidth = 8 sdc_clk = port:PC05<3><1><2><default> sdc_cmd = port:PC06<3><1><2><default> sdc_d0 = port:PC08<3><1><2><default> sdc_d1 = port:PC09<3><1><2><default> sdc_d2 = port:PC10<3><1><2><default> sdc_d3 = port:PC11<3><1><2><default> sdc_d4 = port:PC12<3><1><2><default> sdc_d5 = port:PC13<3><1><2><default> sdc_d6 = port:PC14<3><1><2><default> sdc_d7 = port:PC15<3><1><2><default> emmc_rst = port:PC16<3><1><2><default> sdc_det = sdc_use_wp = 0 sdc_wp = sdc_isio = 0 sdc_regulator = "none" sdc_power_supply = "none" sdc_2xmode = 1 sdc_ddrmode = 1 [smc_para] smc_used = 0 smc_rst = port:PA09<2><default><default><default> smc_vppen = port:PA20<3><default><default><default> smc_vppp = port:PA21<3><default><default><default> smc_det = port:PA10<2><default><default><default> smc_vccen = port:PA06<2><default><default><default> smc_sck = port:PA07<2><default><default><default> smc_sda = port:PA08<2><default><default><default> [usbc0] usb_used = 1 usb_port_type = 2 usb_detect_type = 0 usb_id_gpio = port:PG12<0><1><default><default> usb_det_vbus_gpio = port:PG12<0><1><default><default> usb_drv_vbus_gpio = port:PL02<1><0><default><0> usb_host_init_state = 1 usb_restrict_gpio = usb_restric_flag = 0 usb_restric_voltage = 3550000 usb_restric_capacity = 5 usb_regulator_io = "nocare" usb_regulator_vol = 0 usb_not_suspend = 0 [usbc1] usb_used = 1 usb_drv_vbus_gpio = usb_restrict_gpio = usb_host_init_state = 1 usb_restric_flag = 0 usb_regulator_io = "nocare" usb_regulator_vol = 0 usb_not_suspend = 0 [usbc2] usb_used = 1 usb_drv_vbus_gpio = usb_restrict_gpio = usb_host_init_state = 1 usb_restric_flag = 0 usb_regulator_io = "nocare" usb_regulator_vol = 0 usb_not_suspend = 0 [usbc3] usb_used = 1 usb_drv_vbus_gpio = usb_restrict_gpio = usb_host_init_state = 1 usb_restric_flag = 0 usb_regulator_io = "nocare" usb_regulator_vol = 0 usb_not_suspend = 0 [usb_feature] vendor_id = 6353 mass_storage_id = 1 adb_id = 2 manufacturer_name = "USB Developer" product_name = "Android" serial_number = "20080411" [msc_feature] vendor_name = "USB 2.0" product_name = "USB Flash Driver" release = 100 luns = 3 [serial_feature] serial_unique = 0 [module_para] module_num = 7 module_power0 = "vcc-wifi-33" module_power0_vol = 0 module_power1 = module_power1_vol = module_power2 = module_power2_vol = module_power3 = module_power3_vol = chip_en = lpo_use_apclk = [wifi_para] wifi_used = 0 wifi_sdc_id = 1 wifi_usbc_id = 5 wifi_usbc_type = 1 wl_reg_on = port:PL07<1><default><default><0> wl_host_wake = port:PG10<0><default><default><0> wl_host_wake_invert = 0 [bt_para] bt_used = 0 bt_uart_id = 1 bt_rst_n = bt_wake = bt_host_wake = bt_host_wake_invert = 0 [pcm0] daudio_used = 0 daudio_master = 4 daudio_select = 1 audio_format = 1 signal_inversion = 1 mclk_fs = 128 sample_resolution = 16 slot_width_select = 32 pcm_lrck_period = 32 pcm_lrckr_period = 1 msb_lsb_first = 0 sign_extend = 0 slot_index = 0 slot_width = 32 frame_width = 0 tx_data_mode = 0 rx_data_mode = 0 i2s_mclk = port:PA18<2><1><default><default> i2s_bclk = port:PA19<2><1><default><default> i2s_dout0 = port:PA20<2><1><default><default> i2s_din = port:PA21<2><1><default><default> [pcm1] daudio_used = 0 daudio_master = 4 daudio_select = 1 audio_format = 1 signal_inversion = 1 mclk_fs = 128 sample_resolution = 16 slot_width_select = 32 pcm_lrck_period = 32 pcm_lrckr_period = 1 msb_lsb_first = 0 sign_extend = 0 slot_index = 0 slot_width = 32 frame_width = 0 tx_data_mode = 0 rx_data_mode = 0 i2s_mclk = port:PG10<2><1><default><default> i2s_bclk = port:PG11<2><1><default><default> i2s_dout0 = port:PG12<2><1><default><default> i2s_din = port:PG13<2><1><default><default> [audio0] audio_used = 1 lineout_vol = 31 cap_vol = 5 audio_hp_ldo = "none" adcagc_used = 0 adcdrc_used = 0 dacdrc_used = 0 adchpf_used = 0 dachpf_used = 0 audio_pa_ctrl = port:PA16<1><default><default><0> [spdif0] spdif_used = 0 spdif_dout = port:PA17<2><1><default><default> [audiohub] hub_used = 0 codec_used = 1 spdif_used = 1 hdmi_used = 1 [s_cir0] ir_used = 0 ir_rx = port:PL11<2><1><default><default> ir_power_key_code0 = 87 ir_addr_code0 = 40704 ir_power_key_code1 = 26 ir_addr_code1 = 64260 ir_power_key_code2 = 20 ir_addr_code2 = 32640 ir_power_key_code3 = 21 ir_addr_code3 = 32640 ir_power_key_code4 = 11 ir_addr_code4 = 63240 ir_power_key_code5 = 3 ir_addr_code5 = 239 ir_power_key_code6 = 159 ir_addr_code6 = 19635 ir_power_key_code7 = 10 ir_addr_code7 = 30536 ir_power_key_code8 = 69 ir_addr_code8 = 48386 ir_power_key_code9 = 77 ir_addr_code9 = 56865 ir_power_key_code10 = 24 ir_addr_code10 = 65025 ir_power_key_code11 = 87 ir_addr_code11 = 65280 ir_power_key_code12 = 77 ir_addr_code12 = 65344 [cir] ir_used = 1 ir_tx = port:PH07<2><default><default><default> [dvfs_table] pmuic_type = 1 pmu_gpio0 = port:PL06<1><1><2><1> pmu_level0 = 11300 pmu_level1 = 1100 max_freq = 1200000000 min_freq = 480000000 LV_count = 5 LV1_freq = 1200000000 LV1_volt = 1300 LV2_freq = 1008000000 LV2_volt = 1300 LV3_freq = 912000000 LV3_volt = 1100 LV4_freq = 648000000 LV4_volt = 1100 LV5_freq = 480000000 LV5_volt = 1100 [gpu_dvfs_table] G_LV_count = 3 G_LV0_freq = 312000000 G_LV0_volt = 1200000 G_LV1_freq = 384000000 G_LV1_volt = 1200000 G_LV2_freq = 456000000 G_LV2_volt = 1200000 [Vdevice] Vdevice_used = 0 Vdevice_0 = port:PH10<5><1><2><default> Vdevice_1 = port:PH11<5><1><2><default> [s_uart0] s_uart_used = 0 s_uart_tx = port:PL02<2><default><default><default> s_uart_rx = port:PL03<2><default><default><default> [s_rsb0] s_rsb_used = 1 s_rsb_sck = port:PL00<2><1><2><default> s_rsb_sda = port:PL01<2><1><2><default> [s_jtag0] s_jtag_used = 0 s_jtag_tms = port:PL04<2><1><2><default> s_jtag_tck = port:PL05<2><1><2><default> s_jtag_tdo = port:PL06<2><1><2><default> s_jtag_tdi = port:PL07<2><1><2><default> [s_powchk] s_powchk_used = -2147483648 s_power_reg = 0 s_system_power = 50 [sim0] scr_used = 0 scr_vccen = port:PA06<2><default><default><default> scr_slk = port:PA07<2><default><default><default> scr_sda = port:PA08<2><default><default><default> scr_rst = port:PA09<2><default><default><default> scr_det = port:PA10<2><default><default><default> [ts0] tsc_used = 0 tsc_clk = port:PE00<3><default><default><default> tsc_err = port:PE01<3><default><default><default> tsc_sync = port:PE02<3><default><default><default> tsc_dvld = port:PE03<3><default><default><default> tsc_d0 = port:PE04<3><default><default><default> tsc_d1 = port:PE05<3><default><default><default> tsc_d2 = port:PE06<3><default><default><default> tsc_d3 = port:PE07<3><default><default><default> tsc_d4 = port:PE08<3><default><default><default> tsc_d5 = port:PE09<3><default><default><default> tsc_d6 = port:PE10<3><default><default><default> tsc_d7 = port:PE11<3><default><default><default> [gpio_power_key] key_used = 1 key_io = port:PL03<6><default><default><0> [key_para] key_used = 0 key_cnt = 5 key1_vol = 222 key2_vol = 444 key3_vol = 666 key4_vol = 857 key5_vol = 2000 [d7s_para] d7s_used = 0 din_gpio = port:PD00<1><default><default><1> clk_gpio = port:PD01<1><default><default><1> stb_gpio = port:PD02<1><default><default><1> [mali_para] mali_used = 1 mali_clkdiv = 1 mali_extreme_freq = 600 mali_extreme_vol = 1400 [w1_para] w1_used = 1 gpio = 20 [corekeeper] corekeeper_enabled = 1
I picked up an orange pi on ebay to experiment with. The smallest ones are really cheap (~$10) and have the only ports I need – Ethernet/RJ45 and a USB port. I just need to be able to ssh into the Orange Pi and then use it to program a Teensy MCU. It appears I should be able to do this though the Teensy loader is still questionable.
Unlike the Raspberry Pi, documentation and help is not as forth coming for the OPI. I wasted hours trying to figure out why my monitor was showing horrible colors (HDMI to DVI is not supported out of the box).
My primary instructions were the orange pi quick start.
This post is a very brief list of the steps I had to follow to get the OPI running. If you need hand-holding, you will be better off finding other instructions.
What You Will Need
Prep the SD Card
Prep the Hardware
The login for raspbian is root and password is orangepi.
Dealing with DVI
From what I’ve been able to tell some DVI monitors won’t work at all, some will show totally screwed up colors. From what I can tell this seems to depend on if the monitor recognizes HDCP (and I could be totally wrong about that).
If your DVI monitor shows nothing, I don’t think this next procedure will work (and if your monitor shows nothing there’s really no way to actually do this procedure without first connecting to an HDMI monitor).
I used these resources to figure this out:
http://www.orangepi.org/orangepibbsen/forum.php?mod=viewthread&tid=475&page=1#pid4648
and
https://github.com/linux-sunxi/sunxi-tools#building
Next I will alter the operating system to follow my standard config (such as installing VNC). If I find any oddities in OPI vs RPI in this regard, I’ll report them next.
I recently built a 5G bucket swamp cooler very similar to this:
I used a tack like he does to puncture the water supply hose and I simply could not get enough water to keep the pad moist. I went back and used a much larger nail and still the water supply was too constricted to do the job.
I ended up using a razor to slice the hose and that finally started producing reasonable water flow.
To do this:
After you do this, you should find the water only shoots down toward the pad and there is enough flow thru the slits to keep the pad moist.
BTW, I am generally seeing a 10 degree temp difference with my cooler. I expect to field test it next week.
Need to file this one away for future use.
In Linux Mint / Mate, the underscores for accelerators keys is only on when you hold down ALT. I invariably forget this because they aren’t obvious, and don’t make use of them which slows me down. I *hate* having to use the mouse.
Tonight I went looking to see if they could be forced to stay on.
The few instructions I’ve found tell you to set the gnome setting “automatic-mnemomics” to false. I tried that repeatedly w/ no luck.
Eureka! I am using MATE not gnome. Doh! went looking in the Mate section of dconf settings and found the exact same setting. Set that to false and now underscores are always on.
Note: install dconf-editor. This is much easier than using gsettings and typing everything by hand.
The specific tree to this setting is:
org.mate.desktop.interface automatic-mnemonics
I need to solder pins to multiple CH1724 modems which look like this:
I tried soldering header pins directly, but that was a cluster. So I designed this little adapter board:
You can layout header pins on a PCB, put the adapter board on the pins, then the modem on the adapter board like this:
and you end up with:
I’ve placed this adapter board on dirtypcbs.com so you can order your own. You can find it here.
If you need such a beast and you don’t want to order a minimum quantity of 10, check with me and I may have a spare I can send you cheap.
DISCLAIMER: If you build this device, I take no responsibility for any outcome. Make sure you are sighted-in well enough to be hitting the target everytime and place the equipment in a position to avoided being hit. Lithium batteries are particularly dangerous and hitting one with a bullet will have a nasty outcome such as this: https://www.youtube.com/watch?v=j2mYsBue_30
A friend and I were looking at a very cool commercial WiFi target spotting scope. It lets you see easily see a shooting target from your phone / tablet and software tracks each shot. Cool but at $350, we weren’t really interested. We bounced around some ideas and found someone using a WiFi router and IP camera to do the same thing. Genius!
That guy’s rig was just a 20 second YouTube clip with no setup instructions. I’ve duplicated his effort, but documented exactly what you need to make this happen.
I’m using a D-Link DCS-920 WiFi camera because that is what I have laying around. It is very old and the video part doesn’t work with Java any longer; however, it will take still pictures fine which is all I really need (I just press refresh to update the picture). If you are a shooter and not a computer person, you should be able to find one of these used on eBay if you want to follow my instructions to the letter. As of writing, the going used price is $20-$50.
I’m also using a TP-Link TL-WR802N because that was just laying around as well. If I were trying to create a serious spotting scope, I’d go with a router that has external antennas so it has the maximum possible range. Since this project is expected to be used outdoors with no obstructions, the TL-WR802N is acceptable, at least as far as I am capable of hitting a target. As of writing, this is a current device that can be had on amazon for about $25.
Parts
Configure the WiFi Router
The WiFi Router will be configured to be a wireless router which will allow your phone/tablet/PC to access the WiFi Camera via WiFi (note that android doesn’t support adhoc access, so a WiFi router is required).
These instructions are specific to configuring the TL-WR802N, but the same general configuration will apply to other routers.
Configure the IP Camera
Next, the DCS-920 will be configured to use the WiFi router.
This camera can be a bit confusing. Although it has both an ethernet and wifi connection, they BOTH are assigned to the same IP address. Remember that as you go thru the configuration.
Test WiFi Access to Spotting Scope from Laptop
Now let’s make sure everything works properly.
Test Phone / Tablet
If the laptop is working, time to connect using your phone.
Create a link to just the Picture
I’m using firefox on my phone, so this is how to create a link to just the picture.
Field Setup
Setting the camera up in the field is pretty straight forward. Plug everything in, and go to the bookmark you saved above with your phone/tablet. Using the phone, you can position the camera as you need it.
Obviously, position the camera where it can’t get hurt. More importantly, make sure the battery pack CANNOT get hit. As already pointed out, hitting the lithium battery would result in a fire.
When I’m ready to use this, I will use a barrel jack extension cord to separate the camera from the router and battery pack so both can be position well out of the line of fire.
Note that the DCS-920 has a manual focus ring.
Here is my test setup (done inside because it is miserable out today):
Clean Up
Don’t forget to reconfigure your laptop’s Ethernet interface back to it’s original settings.
Duct tape is renown for its usefulness. No argument there – I keep rolls in my vehicles, snowmobiles, ATVs, etc. for emergencies.
Interestingly, it sucks for use on actual ducts. I tried that many years ago only to have the tape completely fall off after several months.
I was introduced to Gaffer Tape many years ago by a professional photographer friend. It is typically my go to tape these days.
It is easier to tear, a bit more like cloth so it conforms better if you aren’t taping flat surfaces, and best of all it doesn’t leave a mess when you remove it.
It is more expensive than duct tape, so I still keep cheap duct tape in my vehicles for emergencies. But around the house, gaffer tape is my go to tape.
I got some professional looking PCB boards manufactured for a project recently. The boards look great compared to anything I could do myself.
Problem is, after I solder on the components and try to clean the flux off, I’m always left with a mess. My great looking boards end up with white stains from trying to remove the flux.
In researching this problem, I’ve learned about water soluble solder and no clean solder. I will be trying those in the future, but I’m still left with my most recent board which needs to be cleaned.
After looking around the interweb and doing some experiments here is what worked very well (though not quite perfect).
I found myself needing to verify caller ID operation of a couple of troublesome telephone handsets. To properly test, I want to run 1,000 calls to the handsets and verify they decode caller ID every single time.
During early testing, I would manually call the handsets about 20 times to see if they looked good. Typically the error occurs every 3rd-4th call so that was a little slow but do-able. But there is no way I’m sitting still to watch 1,000 calls.
I could video record the handsets, but watching the video is no faster and trying to fast forward was going to be clumsy as well.
What I really need is a way to toss out most of the video frames then I could just advance a few frames to see the next call.
I recorded the video off a webcam using VLC using this procedure:
https://www.cnet.com/how-to/how-to-record-your-webcam-with-vlc/
After some research I found a utility call ffmpeg which does many things, but for my current need, you can tell it to extract <n> frames per second and save them as a file.
ffmpeg can be found here:
My first test was to extract one frame per second which I did with this command:
ffmpeg -i myfile.mp4 -vf fps=1 c:\tmp\pics\out_%%03d.png
This created a PNG file once a second (1 frame per second), reading myfile.mp4 and creating a series of PNG files called out_001.png, … .
This worked pretty well, but a complete test cycle takes about 20 seconds so I was ending up with 20 PNG files / cycle to flip thru. That’s too many.
I watched the testing process, and both phones’ displays are on for about 10 seconds from the time the CID message comes thru. If I were to capture a frame every 5 seconds, that would be about perfect.
So I ended up using this command:
ffmpeg -i myfile.mp4 -vf fps=0.2 c:\tmp\pics\out_%%03d.png
Now I end up with about 5 frames per test call.
Using picasa to view the first file, I can go to the first picture showing the caller ID message. Then I just press the right key 5 times and I’m on the same spot in the next test. That I can do very quickly.
I can process roughly 1 test every 2-3 seconds flipping thru 5 pics verses having to watch hours of video which just isn’t going to happen.
Update
I’ve went thru this process quite a few times now. Works well, but having to constantly click thru still images is a pain.
So using ffmpeg again as directed here:
https://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images
I created a video to watch. I can then stare blankly at the video and just pause when I think an event has been missed.
When I did the extract, I was extracting 1 frame from the original video every 10 seconds. When I create the new video, I want to see each of those extracted frames every 1/2 second (2 frames per sec). This is the command I used to construct the video:
"\Program Files\ffmpeg\bin\ffmpeg.exe" -framerate 2 -i f11b_%%04d.jpg -c:v libx2 64 -r 30 -pix_fmt yuv420p outx.mp4
My input file is f11b_0001.jpg, f11b_0002.jpg, …
My output file is outx.mp4
I’m reading these jpg files at a rate of 2 / sec (-framerate 2).
The output MP4 file contains 30 frames per sec (-r 30).
