WhyCan Forum(哇酷开发者社区)

aplay PATH_TO_WAV

gpiod::chip chip("gpiochip0");

gpiod::line PH00 = chip.get_line(224);

gpiod::line_bulk PH00_01 = get_lines(std::vector<unsigned int>{224, 225});

PH00.request({"", gpiod::line_request::DIRECTION_OUTPUT, 0})

		DIRECTION_AS_IS = 1,
		/**< Request for values, don't change the direction. */
		DIRECTION_INPUT,
		/**< Request for reading line values. */
		DIRECTION_OUTPUT,
		/**< Request for driving the GPIO lines. */
		EVENT_FALLING_EDGE,
		/**< Listen for falling edge events. */
		EVENT_RISING_EDGE,
		/**< Listen for rising edge events. */
		EVENT_BOTH_EDGES,
		/**< Listen for all types of events. */

using reqType = decltype(glReq::EVENT_BOTH_EDGES);

FLAG_ACTIVE_LOW;
/**< Set the active state to 'low' (high is the default). */
FLAG_OPEN_SOURCE;
/**< The line is an open-source port. */
FLAG_OPEN_DRAIN;
/**< The line is an open-drain port. */
FLAG_BIAS_DISABLED;
/**< The line has neither pull-up nor pull-down resistor enabled. */
FLAG_BIAS_PULL_DOWN;
/**< The line has a configurable pull-down resistor enabled. */
FLAG_BIAS_PULL_UP;
/**< The line has a configurable pull-up resistor enabled. */

modprobe sunxi
modprobe configfs
modprobe libcomposite
modprobe u_ether
modprobe usb_f_rndis

cd /sys/kernel/config/usb_gadget
mkdir g1
cd g1
echo "0x0502" > idVendor
echo "0x3235" > idProduct
mkdir functions/rndis.rn0
mkdir configs/c1.1
ln -s functions/rndis.rn0 configs/c1.1/

echo <udc name> > UDC

ls /sys/class/udc/

echo "" > UDC

iface usb0 inet static
        address 192.168.137.2
        netmask 255.255.255.0
        network 192.168.137.0
        broadcast 192.168.137.255
        gateway 192.168.137.1

ifconfig usb0 up

struct termios sssConf;
//get the current options
tcgetattr(_sensorFd, &sssConf);
//set raw input, 1 second timeout
cfmakeraw(&sssConf);
sssConf.c_cc[VMIN] = FRAME_SIZE;
sssConf.c_cc[VTIME] = 10;
cfsetispeed(&sssConf, B19200);
//set the options 
tcsetattr(_sensorFd, TCSANOW, &sssConf);

.help

[cling]$ .help

 Cling (C/C++ interpreter) meta commands usage
 All commands must be preceded by a '.', except
 for the evaluation statement { }
 ==============================================================================
 Syntax: .Command [arg0 arg1 ... argN]

   .L <filename>                - Load the given file or library

   .(x|X) <filename>[args]      - Same as .L and runs a function with
                                  signature: ret_type filename(args)

   .> <filename>                - Redirect command to a given file
      '>' or '1>'               - Redirects the stdout stream only
      '2>'                      - Redirects the stderr stream only
      '&>' (or '2>&1')          - Redirects both stdout and stderr
      '>>'                      - Appends to the given file

   .undo [n]                    - Unloads the last 'n' inputs lines

   .U <filename>                - Unloads the given file

   .I [path]                    - Shows the include path. If a path is given -
                                  adds the path to the include paths

   .O <level>                   - Sets the optimization level (0-3)
                                  (not yet implemented)

   .class <name>                - Prints out class <name> in a CINT-like style

   .files                       - Prints out some CINT-like file statistics

   .fileEx                      - Prints out some file statistics

   .g                           - Prints out information about global variable
                                  'name' - if no name is given, print them all

   .@                           - Cancels and ignores the multiline input

   .rawInput [0|1]              - Toggle wrapping and printing the
                                  execution results of the input

   .dynamicExtensions [0|1]     - Toggles the use of the dynamic scopes and the
                                  late binding

   .printDebug [0|1]            - Toggles the printing of input's corresponding
                                  state changes

   .storeState <filename>       - Store the interpreter's state to a given file

   .compareState <filename>     - Compare the interpreter's state with the one
                                  saved in a given file

   .stats [name]                - Show stats for internal data structures
                                  'ast'  abstract syntax tree stats
                                  'asttree [filter]'  abstract syntax tree layout
                                  'decl' dump ast declarations
                                  'undo' show undo stack

   .help                        - Shows this information

   .q                           - Exit the program

# echo 'int val = 666;' > tst.cpp
# ./cling
****************** CLING ******************
* Type C++ code and press enter to run it *
*             Type .q to exit             *
*******************************************
[cling]$ 
[cling]$ .L tst.cpp
[cling]$ val
(int) 666

# echo 'int tst(){return 666;}' > tst.cpp
# ./cling
****************** CLING ******************
* Type C++ code and press enter to run it *
*             Type .q to exit             *
*******************************************
[cling]$ 
[cling]$ .x tst.cpp
(int) 666

[cling]$ .I
-cxx-isystem
/usr/include/c++/10
-cxx-isystem
/usr/include/arm-linux-gnueabihf/c++/10
-cxx-isystem
/usr/include/c++/10/backward
-isystem
/usr/local/include
-isystem
/home/cling-src/release/bin/../lib/clang/5.0.0/include
-extern-c-isystem
/usr/include/arm-linux-gnueabihf
-extern-c-isystem
/include
-extern-c-isystem
/usr/include
-I
/home/cling-src/release/include
-I
/home/cling-src/llvm/tools/cling/include
-I
.
-resource-dir
/home/cling-src/release/bin/../lib/clang/5.0.0
-nostdinc++

[cling]$ #include<limits>
[cling]$ 
[cling]$ .class std::numeric_limits<char>
===========================================================================
struct std::numeric_limits<char>
SIZE: 1 FILE: limits LINE: 453
List of member variables --------------------------------------------------
limits          455 0x0      public: static constexpr _Bool is_specialized
limits          468 0x0      public: static constexpr int digits
limits          469 0x0      public: static constexpr int digits10
limits          471 0x0      public: static constexpr int max_digits10
limits          473 0x0      public: static constexpr _Bool is_signed
limits          474 0x0      public: static constexpr _Bool is_integer
limits          475 0x0      public: static constexpr _Bool is_exact
limits          476 0x0      public: static constexpr int radix
limits          484 0x0      public: static constexpr int min_exponent
limits          485 0x0      public: static constexpr int min_exponent10
limits          486 0x0      public: static constexpr int max_exponent
limits          487 0x0      public: static constexpr int max_exponent10
limits          489 0x0      public: static constexpr _Bool has_infinity
limits          490 0x0      public: static constexpr _Bool has_quiet_NaN
limits          491 0x0      public: static constexpr _Bool has_signaling_NaN
limits          492 0x0      public: static constexpr enum std::float_denorm_style has_denorm
limits          494 0x0      public: static constexpr _Bool has_denorm_loss
limits          508 0x0      public: static constexpr _Bool is_iec559
limits          509 0x0      public: static constexpr _Bool is_bounded
limits          510 0x0      public: static constexpr _Bool is_modulo
limits          512 0x0      public: static constexpr _Bool traps
limits          513 0x0      public: static constexpr _Bool tinyness_before
limits          514 0x0      public: static constexpr enum std::float_round_style round_style
List of member functions :---------------------------------------------------
filename     line:size busy function type and name
(compiled)     (NA):(NA) 0 public: static constexpr char min() noexcept;
(compiled)     (NA):(NA) 0 public: static constexpr char max() noexcept;
(compiled)     (NA):(NA) 0 public: static constexpr char lowest() noexcept;
(compiled)     (NA):(NA) 0 public: static constexpr char epsilon() noexcept;
(compiled)     (NA):(NA) 0 public: static constexpr char round_error() noexcept;
(compiled)     (NA):(NA) 0 public: static constexpr char infinity() noexcept;
(compiled)     (NA):(NA) 0 public: static constexpr char quiet_NaN() noexcept;
(compiled)     (NA):(NA) 0 public: static constexpr char signaling_NaN() noexcept;
(compiled)     (NA):(NA) 0 public: static constexpr char denorm_min() noexcept;

$nproc

./build.sh 4

script -qc ./cling | cat 

/ {
	...
	soc {
		...
		tcon0: lcd-controller@1c0c000 {
			...
			ports {
				...
				tcon0_out: port@1 {
					...
					//这是要添加的内容
					tcon0_out_lcd: endpoint@0 {
                        			reg = <0>;
                        			remote-endpoint = <&lcd_in_tcon0>;
                   			};
					//结束
				}
			}
		}
	}
}

/ {
	...
	soc {
		...
		//这是要添加的内容
		panel: panel {
            		#address-cells = <1>;
            		#size-cells = <0>;
            		port {
                		#address-cells = <1>;
                		#size-cells = <0>;
                		lcd_in_tcon0: endpoint {
					//这里要和上面加的那部分一致
					remote-endpoint = <&tcon0_out_lcd>;
				};
			};
		};
		//结束
	}
}

/ {
	...
	soc {
		...
		pio: pinctrl@1c20800 {
            		...
            		//这是要添加的内容
            		lcd0_rgb888_pins: lcd0-rgb888 {
				pins = "PD0", "PD1", "PD2", "PD3",
				       "PD4", "PD5", "PD6", "PD7",
				       "PD8", "PD9", "PD10", "PD11",
				       "PD12", "PD13", "PD14", "PD15",
				       "PD16", "PD17", "PD18", "PD19",
				       "PD20", "PD21", "PD22", "PD23",
				       "PD24", "PD25", "PD26", "PD27";
				function = "lcd0";
			};
			//结束
		};
	}
}

setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait panic=10
load mmc 0:1 0x43000000 sun7i-a20-std-dvr.dtb || load mmc 0:1 0x43000000 boot/sun7i-a20-std-dvr.dtb
load mmc 0:1 0x42000000 zImage || load mmc 0:1 0x42000000 boot/zImage
bootz 0x42000000 - 0x43000000

mkimage -C none -A arm -T script -d boot.cmd boot.scr

bin   dev  home  mnt  proc  run   srv  tmp  var
boot  etc  lib   opt  root  sbin  sys  usr

make CROSS_COMPILE=arm-linux-gnueabihf- A20_std_dvr_defconfig

make CROSS_COMPILE=arm-linux-gnueabihf- menuconfig

make CROSS_COMPILE=arm-linux-gnueabihf- -j$(nproc)

git clone https://github.com/torvalds/linux.git --depth=1

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig

make CROSS_COMPILE=arm-linux-gnueabihf- menuconfig

ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make -j$(nproc) zImage

tar -xf 文件名

export PATH=$PATH:/home/gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf/bin

apt-get install build-essential libncurses5-dev u-boot-tools qemu-user-static debootstrap git binfmt-support libusb-1.0-0-dev pkg-config

git clone https://github.com/SdtElectronics/u-boot-sun7i-std-dvr.git

setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait panic=10
load mmc 0:1 0x43000000 ${fdtfile} || load mmc 0:1 0x43000000 boot/${fdtfile}
load mmc 0:1 0x42000000 zImage || load mmc 0:1 0x42000000 boot/zImage
bootz 0x42000000 - 0x43000000

mkimage -C none -A arm -T script -d boot.cmd boot.scr

dd if=/dev/zero of=${card} bs=1M count=1

dd if=u-boot-sunxi-with-spl.bin of=${card} bs=1024 seek=8

** Reading file would overwrite reserved memory **

- #if  (!defined CONFIG_MACH_SUN8I_V3S) 
- /* 64MB of malloc() pool */
- #define CONFIG_SYS_MALLOC_LEN		(CONFIG_ENV_SIZE + (64 << 20))
- #else
/* 2MB of malloc() pool */
#define CONFIG_SYS_MALLOC_LEN		(CONFIG_ENV_SIZE + (2 << 20))
- #endif

#else
/*
 * 160M RAM (256M minimum minus 64MB heap + 32MB for u-boot, stack, fb, etc.
 * 32M uncompressed kernel, 16M compressed kernel, 1M fdt,
 * 1M script, 1M pxe and the ramdisk at the end.
 */
- #if (!defined CONFIG_MACH_SUN8I_V3S) 
- #define BOOTM_SIZE     __stringify(0xa000000)
- #define KERNEL_ADDR_R  __stringify(SDRAM_OFFSET(2000000))
- #define FDT_ADDR_R     __stringify(SDRAM_OFFSET(3000000))
- #define SCRIPT_ADDR_R  __stringify(SDRAM_OFFSET(3100000))
- #define PXEFILE_ADDR_R __stringify(SDRAM_OFFSET(3200000))
- #define RAMDISK_ADDR_R __stringify(SDRAM_OFFSET(3300000))
- #else
/*
 * 64M RAM minus 2MB heap + 16MB for u-boot, stack, fb, etc.
 * 16M uncompressed kernel, 8M compressed kernel, 1M fdt,
 * 1M script, 1M pxe and the ramdisk at the end.
 */
#define BOOTM_SIZE     __stringify(0x2e00000)
#define KERNEL_ADDR_R  __stringify(SDRAM_OFFSET(1000000))
#define FDT_ADDR_R     __stringify(SDRAM_OFFSET(1800000))
#define SCRIPT_ADDR_R  __stringify(SDRAM_OFFSET(1900000))
#define PXEFILE_ADDR_R __stringify(SDRAM_OFFSET(1A00000))
#define RAMDISK_ADDR_R __stringify(SDRAM_OFFSET(1B00000))
- #endif
#endif

make CROSS_COMPILE=arm-linux-gnueabihf- <board_name>_defconfig

make CROSS_COMPILE=arm-linux-gnueabihf- menuconfig

make CROSS_COMPILE=arm-linux-gnueabihf- -j$(nproc)

&i2c0 {
	status = "okay";

	axp209: pmic@34 {
		reg = <0x34>;
		interrupt-parent = <&nmi_intc>;
		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
	};
};

&pwm {
      pinctrl-names = "default";
      pinctrl-0 = <&pwm0_pin>, <&pwm1_pin>;
      status = "okay";
};