raspi gpio

Hybrid Equipment LED Driver Analysis/********************************* Miscellaneous device driver: Miscdevice*majior=10;** *****************************/#include #include #include #include #include #include ---------IOCTL------------#include ---------Misc_register----#include ----------Cdev--------------#include ----------Delay-------------#include ----------GPIO---------------#include #include #include #define S3c_gpio_special_mark (0XFFFFFFF0)#defi

brain regions to achieve the goal of treatment. System Solution l. In addition to the commonly used gpio in the VC54x series, TMS320VC5402 also provides users with multiple selectable GPIO: HPI 8 and McBSP. It can be used directly with various types of storage. For the controller, choose Cypress's FX2 series product cY7C68013. EZUSB FX2 is an integrated microcontroller of the world's 1st US

Python and hardware Study Notes: Bluetooth (2) You can also set up the bluetooth module according to the AT command in the Appendix. Next we use the bluetooth module to connect to Raspberry Pi to create a bluetooth wireless communication switch. The mobile phone acts as the remote control, we need to set the Bluetooth mode to the slave mode, the baud rate is 9600, And the paired password is 0000. Bluetooth wireless communication switch Creation 1. Required materials 1) bluetooth module; 2) Raspb

Just like learning to program the first example HelloWorld, learning embedded, microcontroller, FPGA and the like the first example is to light a lamp. For a large Linux system, of course, you can write a character device driver to achieve the LED lights we need, or you can directly use the Gpio port, the application to pull the high pull low pin control. However, since the Linux system itself has led subsystems, then you can make good use of it. Bene

How to compile the driver statically into the kernel. Development boards used: TQ210 's s5pv210 Development Board Kernel version: linux-3.8.3 Compiler: ARM-LINUX-GCC 4.4.3 Relevant download Address: First, ready to properly compile the source code to guide the Development Board ( How to achieve the correct configuration and compile a good kernel source of the link address; http://blog.csdn.net/girlkoo/article/details/8719828) Second, under the driver directory of the kernel source kernel folde

EmbeddedLinux Bare Metal Development (eight)--s5pv210 Interrupt processing process an interrupt is a process that the CPU inserts into another program during the execution of the current program due to hardware or software reasons. The interruption process due to hardware causes is unpredictable, that is, random, and soft interrupts are pre-arranged. The signal source that caused the interruption is called the interrupt source. interrupts are divided into external interrupts and internal interr

the following two items: ARCH = arm CROSS_COMPILE =/usr/local/arm/3.4.1/bin/arm-linux (/Usr/local/arm/3.4.1/bin/arm-linux is the address of your compiler) In this way, make menuconfig directly. However, a problem occurs immediately after make: Include/asm/page. h: 111: 2: # error Unknown user operations model Make [1]: *** [arch/arm/kernel/asm-offsets.s] Error 1 Make: *** [prepare0] Error 2 Make [1]: *** [arch/arm/kernel/asm-offsets.s] Error 1 Make: *** [prepare0] Error 2 I have not done well w

Install the Picamera module first using the Python interrupt function add_event_detect and define the callback function Call_back (). Add_event_detect (channel, GPIO.) RISING, Callback=test_callback, bouncetime=200) Rising edge detection, associated callbacks, bouncetime for keypad software stabilization Calling the Picamera methoddef catpure_img(): camera = PiCamera() camera.resolution = (1024,768) camera.start_preview() #预

here ./Linaro Bare-metal toolchain for cortex-r/m, 4.8 2014-q1 Update- download from here 3). Configure a). Unzip to the "/home/username" directory ------------------------ $ tar xzf "~/mqx RTOS 4.1.2 for Vybrid Linux Base.gz.gz" $ tar xjf ~/gcc-arm-none-eabi-4_8-2014q1-20140314-linux.tar.bz2 ------------------------ b). Configuring MQX ./File "Fslmqxos_4_1_2_vybrid/build/common/make/global.mak" Setting up cross-compilation toolchain ------------------------ + Toolchain_rootdir =/home/yourname/

Turn: http://blog.csdn.net/kickxxx/article/details/7236040 Startup Mode MX51 supports four startup modes. These modes are determined by the solder joints on the IC Package (boot_mode 0/1). After reset, the two solder joints are sampled, then save their status to the SRC Boot Mode register (sbmr) Register. The solder joints correspond to logic 0. For logic 1, nvcc_per3 is recommended for Freescale. The four boot modes are internal, reserved, internal boot with fuses, and serial boot through USB/U

GPIO IntroductionGpio is used for the transmission of data by single-chip microcomputer and external devices.When the MCU Gpio is set to output, the MCU can output arbitrary data to gpio, and when the Gpio is set to the input microcontroller can read other devices and transmit to g