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tjctm24024-spi включаем модуль LCD, Touch

Анчик — Sat, 24 Oct 2015 10:19:56 GMT

Итак, получил штучку

Про модуль написано, что входное напряжение максимум 3.0В ( я уже 3.7 подавал :)
http://wiki.iteadstudio.com/images/5/52/H24TM84A-spec.pdf
контроллер там вроде бы ILI9341V_v1.0.pdf

I2C BBB

Анчик — Mon, 14 Sep 2015 19:16:27 GMT

1. BB-I2C1
2. root@beaglebone:~# i2cdetect -r 2
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-2 using read byte commands.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
3.

Watch and clocks, TZ and time(NULL), BBB

bobapro — Tue, 16 Jun 2015 18:34:11 GMT

1. Sync time

The problem is to synchronize time on bbb. My device, after power on, querry time from server and set up linux time:

system( "date 061621252015.42" );

But time(NULL) results UTC time (i think). Well, the answer is set TZ variable to UTC before setup time:

setenv("TZ", "UTC", 1);
system( dateCommand.c_str() );

Well, this is working propertly.

2. Drift? time

Almost ;)

This time lags about 10 min for 1 hour.

Experiment:

1. set hwclock from sysclock
2. wait 30 minutes

Result: diff = 11 +- 2 sec

root@beaglebone:~# hwclock -u
Tue Jun 16 21:33:15 2015 0.000000 seconds
root@beaglebone:~# date
Tue Jun 16 21:33:04 UTC 2015

3. wait 55 min

Result: diff = 2:30 !!

root@beaglebone:~# date
Tue Jun 16 22:02:48 UTC 2015
root@beaglebone:~# hwclock -u
Tue Jun 16 22:05:32 2015 0.000000 seconds
root@beaglebone:~# date
Tue Jun 16 22:02:53 UTC 2015

Second question, Is hwclock show correct time?

I hope yes.

Experiment:

22:08:00

root@beaglebone:~# hwclock -u
Tue Jun 16 22:08:09 2015 0.000000 seconds

(My device is not use my time to sync, then 9sec is ok )

23:11:00

root@beaglebone:~# hwclock -u
Tue Jun 16 23:11:09 2015 0.000000 seconds

Looks good!)

Настройка pinmux BBB

bobapro — Sun, 24 May 2015 21:55:30 GMT

Нужно для:

1. Изменения моды ( см. таблицу в SRM )
2. Изменение подтяжек
3. Включение подтяжек

очень полезно: http://derekmolloy.ie/gpios-on-the-beaglebone-black-using-device-tree-overlays/

Итак, посмотреть текущую таблицу:

root@beaglebone:/sys/kernel/debug/pinctrl/44e10800.pinmux# cat pins

cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pins
registered pins: 142
pin 0 (44e10800) 00000031 pinctrl-single
pin 1 (44e10804) 00000031 pinctrl-single
pin 2 (44e10808) 00000031 pinctrl-single
pin 3 (44e1080c) 00000031 pinctrl-single
pin 4 (44e10810) 00000031 pinctrl-single
pin 5 (44e10814) 00000031 pinctrl-single
pin 6 (44e10818) 00000031 pinctrl-single
pin 7 (44e1081c) 00000031 pinctrl-single
pin 8 (44e10820) 00000027 pinctrl-single
pin 9 (44e10824) 00000027 pinctrl-single
pin 10 (44e10828) 00000027 pinctrl-single
pin 11 (44e1082c) 00000027 pinctrl-single
pin 12 (44e10830) 00000027 pinctrl-single
pin 13 (44e10834) 00000027 pinctrl-single
pin 14 (44e10838) 00000027 pinctrl-single
pin 15 (44e1083c) 00000027 pinctrl-single
pin 16 (44e10840) 00000027 pinctrl-single
pin 17 (44e10844) 00000027 pinctrl-single
pin 18 (44e10848) 00000027 pinctrl-single
pin 19 (44e1084c) 00000027 pinctrl-single
pin 20 (44e10850) 00000017 pinctrl-single
pin 21 (44e10854) 00000007 pinctrl-single
pin 22 (44e10858) 00000017 pinctrl-single
pin 23 (44e1085c) 00000007 pinctrl-single
pin 24 (44e10860) 00000017 pinctrl-single
pin 25 (44e10864) 00000027 pinctrl-single
pin 26 (44e10868) 00000027 pinctrl-single
pin 27 (44e1086c) 00000027 pinctrl-single
pin 28 (44e10870) 00000026 pinctrl-single
pin 29 (44e10874) 00000006 pinctrl-single
pin 30 (44e10878) 00000037 pinctrl-single
pin 31 (44e1087c) 00000037 pinctrl-single
pin 32 (44e10880) 00000032 pinctrl-single
pin 33 (44e10884) 00000032 pinctrl-single
pin 34 (44e10888) 00000037 pinctrl-single
pin 35 (44e1088c) 00000027 pinctrl-single
pin 36 (44e10890) 00000037 pinctrl-single
pin 37 (44e10894) 00000037 pinctrl-single
pin 38 (44e10898) 00000037 pinctrl-single
pin 39 (44e1089c) 00000037 pinctrl-single
pin 40 (44e108a0) 0000002f pinctrl-single
pin 41 (44e108a4) 0000002f pinctrl-single
pin 42 (44e108a8) 0000002f pinctrl-single
pin 43 (44e108ac) 0000002f pinctrl-single
pin 44 (44e108b0) 0000002f pinctrl-single
pin 45 (44e108b4) 0000002f pinctrl-single
pin 46 (44e108b8) 0000002f pinctrl-single
pin 47 (44e108bc) 0000002f pinctrl-single
pin 48 (44e108c0) 0000002f pinctrl-single
pin 49 (44e108c4) 0000002f pinctrl-single
pin 50 (44e108c8) 0000002f pinctrl-single
pin 51 (44e108cc) 0000002f pinctrl-single
pin 52 (44e108d0) 0000002f pinctrl-single
pin 53 (44e108d4) 0000002f pinctrl-single
pin 54 (44e108d8) 0000002f pinctrl-single
pin 55 (44e108dc) 0000002f pinctrl-single
pin 56 (44e108e0) 00000027 pinctrl-single
pin 57 (44e108e4) 00000027 pinctrl-single
pin 58 (44e108e8) 00000027 pinctrl-single
pin 59 (44e108ec) 00000027 pinctrl-single
pin 60 (44e108f0) 00000030 pinctrl-single
pin 61 (44e108f4) 00000030 pinctrl-single
pin 62 (44e108f8) 00000030 pinctrl-single
pin 63 (44e108fc) 00000030 pinctrl-single
pin 64 (44e10900) 00000030 pinctrl-single
pin 65 (44e10904) 00000030 pinctrl-single
pin 66 (44e10908) 00000027 pinctrl-single
pin 67 (44e1090c) 00000027 pinctrl-single
pin 68 (44e10910) 00000020 pinctrl-single
pin 69 (44e10914) 00000000 pinctrl-single
pin 70 (44e10918) 00000020 pinctrl-single
pin 71 (44e1091c) 00000000 pinctrl-single
pin 72 (44e10920) 00000000 pinctrl-single
pin 73 (44e10924) 00000000 pinctrl-single
pin 74 (44e10928) 00000000 pinctrl-single
pin 75 (44e1092c) 00000020 pinctrl-single
pin 76 (44e10930) 00000020 pinctrl-single
pin 77 (44e10934) 00000020 pinctrl-single
pin 78 (44e10938) 00000020 pinctrl-single
pin 79 (44e1093c) 00000020 pinctrl-single
pin 80 (44e10940) 00000020 pinctrl-single
pin 81 (44e10944) 00000027 pinctrl-single
pin 82 (44e10948) 00000030 pinctrl-single
pin 83 (44e1094c) 00000010 pinctrl-single
pin 84 (44e10950) 00000021 pinctrl-single
pin 85 (44e10954) 00000001 pinctrl-single
pin 86 (44e10958) 00000062 pinctrl-single
pin 87 (44e1095c) 00000062 pinctrl-single
pin 88 (44e10960) 0000002f pinctrl-single
pin 89 (44e10964) 00000027 pinctrl-single
pin 90 (44e10968) 00000037 pinctrl-single
pin 91 (44e1096c) 00000037 pinctrl-single
pin 92 (44e10970) 00000030 pinctrl-single
pin 93 (44e10974) 00000000 pinctrl-single
pin 94 (44e10978) 00000073 pinctrl-single
pin 95 (44e1097c) 00000073 pinctrl-single
pin 96 (44e10980) 00000020 pinctrl-single
pin 97 (44e10984) 00000020 pinctrl-single
pin 98 (44e10988) 00000070 pinctrl-single
pin 99 (44e1098c) 00000070 pinctrl-single
pin 100 (44e10990) 00000033 pinctrl-single
pin 101 (44e10994) 00000033 pinctrl-single
pin 102 (44e10998) 00000013 pinctrl-single
pin 103 (44e1099c) 00000013 pinctrl-single
pin 104 (44e109a0) 00000024 pinctrl-single
pin 105 (44e109a4) 00000027 pinctrl-single
pin 106 (44e109a8) 00000027 pinctrl-single
pin 107 (44e109ac) 00000027 pinctrl-single
pin 108 (44e109b0) 00000023 pinctrl-single
pin 109 (44e109b4) 00000027 pinctrl-single
pin 110 (44e109b8) 00000030 pinctrl-single
pin 111 (44e109bc) 00000028 pinctrl-single
pin 112 (44e109c0) 00000030 pinctrl-single
pin 113 (44e109c4) 00000028 pinctrl-single
pin 114 (44e109c8) 00000028 pinctrl-single
pin 115 (44e109cc) 00000028 pinctrl-single
pin 116 (44e109d0) 00000030 pinctrl-single
pin 117 (44e109d4) 00000030 pinctrl-single
pin 118 (44e109d8) 00000030 pinctrl-single
pin 119 (44e109dc) 00000030 pinctrl-single
pin 120 (44e109e0) 00000020 pinctrl-single
pin 121 (44e109e4) 00000030 pinctrl-single
pin 122 (44e109e8) 00000030 pinctrl-single
pin 123 (44e109ec) 00000028 pinctrl-single
pin 124 (44e109f0) 00000028 pinctrl-single
pin 125 (44e109f4) 00000028 pinctrl-single
pin 126 (44e109f8) 00000030 pinctrl-single
pin 127 (44e109fc) 00000028 pinctrl-single
pin 128 (44e10a00) 00000028 pinctrl-single
pin 129 (44e10a04) 00000020 pinctrl-single
pin 130 (44e10a08) 00000028 pinctrl-single
pin 131 (44e10a0c) 00000028 pinctrl-single
pin 132 (44e10a10) 00000028 pinctrl-single
pin 133 (44e10a14) 00000028 pinctrl-single
pin 134 (44e10a18) 00000028 pinctrl-single
pin 135 (44e10a1c) 00000020 pinctrl-single
pin 136 (44e10a20) 00000028 pinctrl-single
pin 137 (44e10a24) 00000028 pinctrl-single
pin 138 (44e10a28) 00000028 pinctrl-single
pin 139 (44e10a2c) 00000028 pinctrl-single
pin 140 (44e10a30) 00000028 pinctrl-single
pin 141 (44e10a34) 00000020 pinctrl-single

Не шибко понимаю, почему Pimux обитает в этом месте.

Второе поле означает

Bit	Field	Reset	Description
6	conf_	X	Slew Control. Slew Rate: Fast is 0, Slow is 1
5	conf_	1h	Receiver Active. Input Enable: Receiver Disable 0, Receiver Enable 1
4	conf_	X	Pad Pullup/Pulldown Type. Pulldown is 0, Pullup is 1
3	conf_	X	Pad Pullup/Pulldown enable. Enabled is 0, Disabled is 1
2-0	conf_	X	Mode. Pad functional mux select. A number between 0 and 7 i.e. 000 and 111. This depends on which mode we require.

Пытаемся поменять для 0_27 пина. У него pin 27 (44e1086c) 00000027 pinctrl-single .

Говорят, нужно пользоваться Device Tree Overlays.

Ну, попробуем. Я взял Файл Derek'а, подставил в него смещение 6с я насчитал)

Я три раза прочитал, не понял что там со смещениями, не нашел закономерностей в том, что Дерек написал. Пин 60 у него считается и как то становится пином 88, что-то я не догоняю. Будем пробовать)

/dts-v1/;
/plugin/;

/{
compatible = "ti,beaglebone", "ti,beaglebone-black";
part-number = "DM-GPIO-Test";
version = "00A0";

fragment@0 {
target = <&am33xx_pinmux>;

__overlay__ {
pinctrl_test: DM_GPIO_Test_Pins {
           pinctrl-single,pins = <

               0x06с 0x37 /* I think it is p0-27, pull-up, in_en, mode7 */

/* OUTPUT GPIO(mode7) 0x07 pulldown, 0x17 pullup, 0x?f no pullup/down */
           /* INPUT GPIO(mode7) 0x27 pulldown, 0x37 pullup, 0x?f no pullup/down */

           >;
       };
};
};

fragment@1 {
       target = <&ocp>;
       __overlay__ {
           test_helper: helper {
               compatible = "bone-pinmux-helper";
               pinctrl-names = "default";
               pinctrl-0 = <&pinctrl_test>;
               status = "okay";
           };
       };
   };
};

Компиляция безуспешная, хз почему

root@beaglebone:/lib/firmware# dtc -O dtb -o DM-GPIO-Test-00A0.dtbo -b 0 -@ DM-GPIO-Test.dts
Error: DM-GPIO-Test.dts:15.5-6 syntax error
FATAL ERROR: Unable to parse input tree

В комментах Дерека, написано что надо сделать именно синхронизацию на bbb. Я сделал гит прямо на устройство, и, о чудо! компилится. Не связанно ли это с переводами строк? Зашел в эклипсе, поменял строки, сохранил (все на устройстве), компилится.

Переносим *.dtbo в /lib/firmware

root@beaglebone:/home/dm_gpio/boneDeviceTree/overlay# cp DM-GPIO-Test-00A0.dtbo /lib/firmware

uEnv.txt

optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN capemgr.enable_partno=BB-SPIDEV1,BB-UART1,BB-UART2,BB-UART4,DM-GPIO-Test

перезагружаемся...

root@beaglebone:~# cat /sys/devices/bone_capemgr.*/slots
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-SPIDEV1
8: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART1
9: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART2
10: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART4

А вот так сработало, страннооо

root@beaglebone:~# echo DM-GPIO-Test > /sys/devices/bone_capemgr.*/slots
root@beaglebone:~# cat /sys/devices/bone_capemgr.*/slots
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-SPIDEV1
8: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART1
9: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART2
10: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART4
11: ff:P-O-L Override Board Name,00A0,Override Manuf,DM-GPIO-Test

проверяем

pin 27 (44e1086c) 00000037 pinctrl-single

Ну, это почти победа!

По факту, не работает. Неправильное смещение? Оказывается, там лабуда с номерами пинов полная. Смотри таблицу смещений тут

http://www.valvers.com/embedded-linux/beaglebone-black/step04-gpio/

согласно таблице, наш адрес 2c, суть пин 11 в файле pinmux

Работает, нога подтянулась к питанию. Но это жесть путаница. ~~Не понимаю, почему не работает uEnv.txt~~ Работает он, просто пробел поставил после запятой, поэтому не работало.

Потуги с SPI на BBB

bobapro — Wed, 01 Apr 2015 18:03:55 GMT

Ссылки:
https://www.linux.com/learn/tutorials/746860-how-to-access-chips-over-the-spi-on-beaglebone-black
http://stackoverflow.com/questions/23691084/reading-sensor-with-spi
http://hipstercircuits.com/enable-spi-with-device-tree-on-beaglebone-black-copy-paste/

1. Смотрим в таблицу, видим, что можно использовать SPI0 и SPI1 на разъеме P9 (p9.28, p9.29, p9.30, p9.31) beagleboneblack. На всякий случай напомню у меня

root@beaglebone:/lib/firmware# uname -a
Linux beaglebone 3.8.13 #1 SMP Wed Sep 4 09:09:32 CEST 2013 armv7l GNU/Linux

SPI0 я откинул, так как он закроет мне UART2.
Итак, привет SPI1.

2. Ну, в папке /dev/ нет ничего что бы называлось хоть как то близко к spi.

Делаем все как в 3ей ссылке, и вот облом не выходит:

Start nano

nano BB-SPI1-01-00A0.dts

Copy-paste this into the file:

/dts-v1/;
/plugin/;

/ {
    compatible = "ti,beaglebone", "ti,beaglebone-black";

    /* identification */
    part-number = "BB-SPI1-01";

    /* version */
    version = "00A0";

    /* state the resources this cape uses */
    exclusive-use =
        /* the pin header uses */
        "P9.31",
        "P9.29",
        "P9.30",
        "P9.28",
        "P9.13",
        "P9.12", 
        "spi1";

    fragment@0 {
        target = <&am33xx_pinmux>;
        __overlay__ {
            pinctrl_spi1: pinctrl_spi1_pins {
                pinctrl-single,pins = <                                        
                    0x190 0x13    /* P9_31 = mcasp0_aclkx.spi1_sclk                 , OUTPUT_PULLUP | MODE3 */
                    0x194 0x33    /* P9_29 = mcasp0_fsx.spi1_d0                     , INPUT_PULLUP  | MODE3 */
                    0x198 0x13    /* P9_30 = mcasp0_axr0.spi1_d1                     , OUTPUT_PULLUP | MODE3 */
                    0x19c 0x13    /* P9_28 = mcasp0_ahclkr.spi1_cs0                 , OUTPUT_PULLUP | MODE3 */                    
                    0x164 0x12  /* P9_42 = GPIO0_7 =  eCAP0_in_PWM0_out.gpio0[7] , OUTPUT_PULLUP | MODE2 */
                >;
            };
        };
    };

    fragment@1 {
        target = <&spi1>;
        __overlay__ {
            #address-cells     = <1>;
            #size-cells     = <0>;
            status            = "okay";
            pinctrl-names    = "default";
            pinctrl-0        = <&pinctrl_spi1>;    
            cs-gpios         = <&gpio4 17 0>, <&gpio1 7 0>;

            spi1_0{
                #address-cells       = <1>;
                #size-cells       = <0>;
                compatible           = "spidev";
                reg               = <0>;
                spi-max-frequency = <16000000>;
                spi-cpha;          
            };
            spi1_1{
                #address-cells       = <1>;
                #size-cells       = <0>;
                compatible           = "spidev";
                reg               = <1>;
                spi-max-frequency = <16000000>;
                // Mode 0 (CPOL = 0, CPHA = 0)
            };
        };
    };
};

Close the file (Ctrl-o, Ctrl-x) and compile using dtc:

dtc -O dtb -o BB-SPI1-01-00A0.dtbo -b 0 -@ BB-SPI1-01-00A0.dts

Then, copy the file into /lib/firmware/:

 cp BB-SPI1-01-00A0.dtbo /lib/firmware/

Then enable the device tree overlay:

 echo BB-SPI1-01 > /sys/devices/bone_capemgr.*/slots

root@beaglebone:/dev# echo BB-SPI1-01 > /sys/devices/bone_capemgr.8/slots
-sh: echo: write error: File exists

Вобщем почитал http://stackoverflow.com/questions/17707987/beaglebone-linux-issues-appending-a-line-to-a-file написано что SPI1 не может одновременно работать s HDMI. Я это уже видел много раз, но надеялся что пронесет. Чтож, читаем как отключтьб HDMI...

3. HDMI turn off

root@beaglebone:/dev# cat /sys/devices/bone_capemgr.*/slots
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART1
8: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART2
9: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART4

mount /dev/mmcblk0p1 /mnt/card

nano /mnt/card/uEnv.txt

мой файл:
optargs=quiet drm.debug=7

Пишем
optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN

Перезагружаемся

root@beaglebone:~# cat /sys/devices/bone_capemgr.*/slots
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART1
8: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART2
9: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-UART4

root@beaglebone:~# echo BB-SPI1-01 > /sys/devices/bone_capemgr.8/slots
-sh: echo: write error: File exists

Хм...

Итог.

Вроде получилось, я попробовал сделать все то же с spi0 вышло, spi1 ну никак. В итоге просто сделал строку в файле uEnv.txt

optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN capemgr.enable_partno=BB-SPI0-01,BB-SPI1-01

и появилось три файла в папке /dev/

root@beaglebone:~# ls /dev/spi*
/dev/spidev1.0 /dev/spidev2.0 /dev/spidev2.1
root@beaglebone:~#

Код:

static const char *spi_name = "/dev/spidev2.0";

uint32_t readMAX(int spiDev)
{
   struct spi_ioc_transfer xfer;
   char rxBuffer[8];
   uint32_t data= 0;
   int res=0;

   xfer.rx_buf = (unsigned long)rxBuffer;
   xfer.len = 8;
   xfer.speed_hz = 100000;
   xfer.cs_change = 1;
   xfer.bits_per_word = 4;
   xfer.delay_usecs= 10;

   while( 1){
   res = ioctl(spiDev, SPI_IOC_MESSAGE(1), &xfer);
   usleep(100000);
   }

int main() {
int spiDev = open(spi_name, O_RDWR);
   readMAX(spiDev);

Ногами дергает, прием не проверял пока

Прием на втором порте не работал. Исправился:

Кажется, вопрос решился. Точно не уверен, тестирую.
По умолчанию, в папке /lib/firmware были файлы
BB-SPI0-01-00A0.dtbo
BB-SPI1-01-00A0.dtbo
Поэтому uEnv.txt я написал:
optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN capemgr.enable_partno=BB-SPI0-01,BB-SPI1-01
При старте либо создавалось 3 файла в папке /dev/
spidev1.0
spidev2.0
spidev2.1
И второй порт лагал, либо один файл
spidev1.0

Я, следуя инструкции по включению, сделал три новых файла
BB-SPIDEV0-00A0.dts
BB-SPIDEV1-00A0.dts
BB-SPIDEV1A1-00A0.dts, получил из них *.dtbo
и переписал строку uEnv
optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN capemgr.enable_partno=BB-SPIDEV0,BB-SPIDEV1

При первом включении создалось
root@beaglebone:~# ls /dev/sp*
/dev/spidev1.0 /dev/spidev1.1 /dev/spidev2.0 /dev/spidev2.1
И второй порт заработал нормально. В чем причина такого поведения, не знаю. Стабильность появления второго порта после перезагрузки буду проверять

BBB Services

bobapro — Tue, 17 Feb 2015 20:55:38 GMT

From SDCard boot service list

UNIT LOAD ACTIVE SUB DESCRIPTION
proc-sys...t_misc.automount loaded active waiting Arbitrary Executable File Fo
sys-devi...tty-ttyO0.device loaded active plugged /sys/devices/ocp.2/44e09000.
sys-devi...ty-ttyGS0.device loaded active plugged /sys/devices/ocp.2/47400000.
sys-devi...-net-eth0.device loaded active plugged /sys/devices/ocp.2/4a100000.
sys-devi...blk1boot0.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...blk1boot1.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...mmcblk1p1.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...mmcblk1p2.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...k-mmcblk1.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...mmcblk0p1.device loaded active plugged /sys/devices/ocp.2/mmc.4/mmc
sys-devi...mmcblk0p2.device loaded active plugged /sys/devices/ocp.2/mmc.4/mmc
sys-devi...k-mmcblk0.device loaded active plugged /sys/devices/ocp.2/mmc.4/mmc
sys-devi...und-card0.device loaded active plugged /sys/devices/ocp.2/sound.13/
sys-devi...tty-ttyS0.device loaded active plugged /sys/devices/platform/serial
sys-devi...tty-ttyS1.device loaded active plugged /sys/devices/platform/serial
sys-devi...tty-ttyS2.device loaded active plugged /sys/devices/platform/serial
sys-devi...tty-ttyS3.device loaded active plugged /sys/devices/platform/serial
sys-subs...ices-eth0.device loaded active plugged /sys/subsystem/net/devices/e
-.mount loaded active mounted /
dev-mqueue.mount loaded active mounted POSIX Message Queue File Sys
etc-machine\x2did.mount loaded active mounted /etc/machine-id
sys-kernel-debug.mount loaded active mounted Debug File System
tmp.mount loaded active mounted /tmp
systemd-...ord-console.path loaded active waiting Dispatch Password Requests t
systemd-...ssword-wall.path loaded active waiting Forward Password Requests to
avahi-daemon.service loaded failed failed Avahi mDNS/DNS-SD Stack
bonescript-autorun.service loaded active running Bonescript autorun
cloud9.service loaded active running Cloud9 IDE
connman.service loaded active running Connection service
console-kit-daemon.service loaded active running Console Manager
console-...em-start.service loaded active exited Console System Startup Loggi
crond.service loaded active running Periodic Command Scheduler
dbus.service loaded active running D-Bus System Message Bus
gateone.service loaded active running GateOne daemon
gdm.service loaded active running Gnome Display Manager
getty@tty1.service loaded active running Getty on tty1
leds.service loaded active exited Angstrom LED config
mpd.service loaded active running Music Player Daemon
ntpdate.service loaded active exited Network Time Service (one-sh
serial-getty@ttyGS0.service loaded active running Serial Getty on ttyGS0
serial-getty@ttyO0.service loaded active running Serial Getty on ttyO0
storage-gadget-init.service loaded active running Start usb mass storage gadge
systemd-journald.service loaded active running Journal Service
systemd-logind.service loaded active running Login Service
systemd-...les-load.service loaded active exited Load Kernel Modules
systemd-remount-fs.service loaded active exited Remount Root and Kernel File
systemd-sysctl.service loaded active exited Apply Kernel Variables
systemd-...es-setup.service loaded active exited Recreate Volatile Files and
systemd-...-trigger.service loaded active exited udev Coldplug all Devices
systemd-udevd.service loaded active running udev Kernel Device Manager
systemd-...sessions.service loaded active exited Permit User Sessions
wpa_supplicant.service loaded active running WPA supplicant
avahi-daemon.socket loaded active listening Avahi mDNS/DNS-SD Stack Acti
bonescript.socket loaded active listening bonescript.socket
dbus.socket loaded active running D-Bus System Message Bus Soc
dropbear.socket loaded active listening dropbear.socket
systemd-initctl.socket loaded active listening /dev/initctl Compatibility N
systemd-journald.socket loaded active running Journal Socket
systemd-shutdownd.socket loaded active listening Delayed Shutdown Socket
systemd-...d-control.socket loaded active listening udev Control Socket
systemd-udevd-kernel.socket loaded active running udev Kernel Socket
basic.target loaded active active Basic System
getty.target loaded active active Login Prompts
graphical.target loaded active active Graphical Interface
local-fs-pre.target loaded active active Local File Systems (Pre)
local-fs.target loaded active active Local File Systems
multi-user.target loaded active active Multi-User
remote-fs.target loaded active active Remote File Systems
sockets.target loaded active active Sockets
sound.target loaded active active Sound Card
swap.target loaded active active Swap
sysinit.target loaded active active System Initialization
cpu-ondemand.timer loaded active waiting Switches to ondemand CPU-fre
systemd-...iles-clean.timer loaded active waiting Daily Cleanup of Temporary D

На рабочей системе:

UNIT LOAD ACTIVE SUB DESCRIPTION
proc-sys...t_misc.automount loaded active waiting Arbitrary Executable File Fo
sys-devi...tty-ttyO0.device loaded active plugged /sys/devices/ocp.2/44e09000.
sys-devi...ty-ttyGS0.device loaded active plugged /sys/devices/ocp.2/47400000.
sys-devi...tty-ttyO1.device loaded active plugged /sys/devices/ocp.2/48022000.
sys-devi...tty-ttyO2.device loaded active plugged /sys/devices/ocp.2/48024000.
sys-devi...tty-ttyO4.device loaded active plugged /sys/devices/ocp.2/481a8000.
sys-devi...-net-eth0.device loaded active plugged /sys/devices/ocp.2/4a100000.
sys-devi...blk0boot0.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...blk0boot1.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...mmcblk0p1.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...mmcblk0p2.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...k-mmcblk0.device loaded active plugged /sys/devices/ocp.2/mmc.10/mm
sys-devi...und-card0.device loaded active plugged /sys/devices/ocp.2/sound.13/
sys-devi...tty-ttyS0.device loaded active plugged /sys/devices/platform/serial
sys-devi...tty-ttyS1.device loaded active plugged /sys/devices/platform/serial
sys-devi...tty-ttyS2.device loaded active plugged /sys/devices/platform/serial
sys-devi...tty-ttyS3.device loaded active plugged /sys/devices/platform/serial
sys-module-fuse.device loaded active plugged /sys/module/fuse
sys-subs...ices-eth0.device loaded active plugged /sys/subsystem/net/devices/e
-.mount loaded active mounted /
dev-mqueue.mount loaded active mounted POSIX Message Queue File Sys
home-root-.gvfs.mount loaded active mounted /home/root/.gvfs
media-BEAGLEBONE.mount loaded active mounted /media/BEAGLEBONE
sys-fs-f...onnections.mount loaded active mounted FUSE Control File System
sys-kernel-debug.mount loaded active mounted Debug File System
tmp.mount loaded active mounted /tmp
systemd-...ord-console.path loaded active waiting Dispatch Password Requests t
systemd-...ssword-wall.path loaded active waiting Forward Password Requests to
avahi-daemon.service loaded active running Avahi mDNS/DNS-SD Stack
bonescript-autorun.service loaded active running Bonescript autorun
bonescript.service loaded active running Bonescript server
cloud9.service loaded active running Cloud9 IDE
connman.service loaded active running Connection service
console-kit-daemon.service loaded active running Console Manager
console-...em-start.service loaded active exited Console System Startup Loggi
crond.service loaded active running Periodic Command Scheduler
dbus.service loaded active running D-Bus System Message Bus
dropbear....2:54583.service loaded active running SSH Per-Connection Server
fire.service loaded active running Fire alarm service
gdm.service loaded active running Gnome Display Manager
getty@tty1.service loaded active running Getty on tty1
leds.service loaded active exited Angstrom LED config
mpd.service loaded failed failed Music Player Daemon
mysql.service loaded active running MySQL database server
mysqld.service loaded failed failed mysqld.service
ntpd.service loaded active running Network Time Service
ntpdate.service loaded active exited Network Time Service (one-sh
serial-getty@ttyGS0.service loaded active running Serial Getty on ttyGS0
serial-getty@ttyO0.service loaded active running Serial Getty on ttyO0
storage-gadget-init.service loaded active running Start usb mass storage gadge
systemd-journald.service loaded active running Journal Service
systemd-logind.service loaded active running Login Service
systemd-...les-load.service loaded active exited Load Kernel Modules
systemd-remount-fs.service loaded active exited Remount Root and Kernel File
systemd-sysctl.service loaded active exited Apply Kernel Variables
systemd-...es-setup.service loaded active exited Recreate Volatile Files and
systemd-...-trigger.service loaded active exited udev Coldplug all Devices
systemd-udevd.service loaded active running udev Kernel Device Manager
systemd-...sessions.service loaded active exited Permit User Sessions
udisks-daemon.service loaded active running Disk Manager
wpa_supplicant.service loaded active running WPA supplicant
avahi-daemon.socket loaded active running Avahi mDNS/DNS-SD Stack Acti
bonescript.socket loaded active running bonescript.socket
dbus.socket loaded active running D-Bus System Message Bus Soc
dropbear.socket loaded active listening dropbear.socket
systemd-initctl.socket loaded active listening /dev/initctl Compatibility N
systemd-journald.socket loaded active running Journal Socket
systemd-shutdownd.socket loaded active listening Delayed Shutdown Socket
systemd-...d-control.socket loaded active listening udev Control Socket
systemd-udevd-kernel.socket loaded active running udev Kernel Socket
basic.target loaded active active Basic System
getty.target loaded active active Login Prompts
graphical.target loaded active active Graphical Interface
local-fs-pre.target loaded active active Local File Systems (Pre)
local-fs.target loaded active active Local File Systems
multi-user.target loaded active active Multi-User
remote-fs.target loaded active active Remote File Systems
sockets.target loaded active active Sockets
sound.target loaded active active Sound Card
swap.target loaded active active Swap
sysinit.target loaded active active System Initialization
cpu-ondemand.timer loaded active elapsed Switches to ondemand CPU-fre
systemd-...iles-clean.timer loaded active waiting Daily Cleanup of Temporary D

BBB PHp Apache и прочие веб-серверы

bobapro — Mon, 16 Feb 2015 23:04:08 GMT

opkg update

root@beaglebone:~# opkg install lighttpd lighttpd-module-fastcgi
Package lighttpd (1.4.31-r2.3) installed in root is up to date.
Package lighttpd-module-fastcgi (1.4.31-r2.3) installed in root is up to date.
Configuring lighttpd-module-indexfile.
Configuring lighttpd-module-fastcgi.
Configuring libpcreposix0.
Configuring libpcre.
Configuring lighttpd-module-dirlisting.
Configuring lighttpd-module-accesslog.
Configuring lighttpd-module-access.
Configuring lighttpd-module-staticfile.
Configuring lighttpd.
ln -s '/lib/systemd/system/lighttpd.service' '/etc/systemd/system/multi-user.target.wants/lighttpd.service'

Почему-то зависло

Более того, после перезагрузки перестало отвечать по ssh по 192.168.1.8. Видимо, порт 22 стал занят?

BBB отключаем сервисы

bobapro — Tue, 20 Jan 2015 21:31:57 GMT

root@beaglebone:~# systemctl disable gdm
rm '/etc/systemd/system/display-manager.service'
root@beaglebone:~# systemctl disable mpd
rm '/etc/systemd/system/multi-user.target.wants/mpd.service'
root@beaglebone:~# systemctl disable bonescript.service
root@beaglebone:~# systemctl disable bonescript.socket
rm '/etc/systemd/system/sockets.target.wants/bonescript.socket'
root@beaglebone:~# systemctl disable bonescript-autorun.service
rm '/etc/systemd/system/multi-user.target.wants/bonescript-autorun.service'
root@beaglebone:~# systemctl disable cloud9.service
rm '/etc/systemd/system/multi-user.target.wants/cloud9.service'

Копирование рабочей системы на новую плату

bobapro — Sun, 07 Dec 2014 20:48:03 GMT

Ну вобщем получилось так

1. Делаем копию всех файлов таром

2. Создаем загрузочную карточку ( я сделал с angstrom, и в нем почему то не появился usb-lan драйвер ) поэтому

3 Копируем как-нибудь получившийся tar.gz на нее. Я сделал так:

3а. Грузимся с внутренней eMMC. Подключаемся эклипсом, копируем эклипсом на загрузочную сд.

4. Грузимся с сд. Ждем пока появится eMMC в списке fdisk -l

Disk /dev/mmcblk1: 1920 MB, 1920991232 bytes
255 heads, 63 sectors/track, 233 cylinders, total 3751936 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/mmcblk1p1 * 63 144584 72261 c W95 FAT32 (LBA)
/dev/mmcblk1p2 144585 3743144 1799280 83 Linux

5. Монтируем, удаляем все со второго раздела eMMC.

root@beaglebone:/home# mkdir /mnt/backup
root@beaglebone:/home# mount /dev/mmcblk1p2 /mnt/backup -o -ro

root@beaglebone:/home# cd /mnt/backup
root@beaglebone:/mnt/backup# dir
bin dev home lost+found mnt run sys usr
boot etc lib media proc sbin tmp var
root@beaglebone:/mnt/backup# rm -rf *

6. Туда распаковываем архив. Типо все.

tar --same-owner -xvpf /home/bbb.tar.gz -C /mnt/backup

Подводные камни:

Я ужасно назвал директорию /mnt/backup по сути это образ будущей системы. Прошу везде читать выше /mnt/internalMMC

*.img шьется win32diskimager

в загрузочной SD два раздела, закатать образ надо на второй, в винде не виден.

Быть внимательным с утилитой распаковки, я два раза не туда распаковал.

BBB: Пишем скрипт и добавляем в автозагрузку

bobapro — Wed, 26 Nov 2014 19:58:00 GMT

Получилось

Этонужно было для включение ком портов. Нашелся способ проще, открываем диск который появляется при подключении USB кабеля и правим файл uEnv.txt

BeagleBone Getting Started/uEnv.txt

optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN capemgr.enable_partno=BB-SPI0-01