rpi gpio

How to Use the imx6q GPIO function, imx6qgpioSuppose we want to use the 11th-foot EIM_D18 of the expansion port.Find EIM_18 in arch/arm/plat-mxc/include/mach/iomux-mx6q.h first,You can find MX6Q_PAD_EIM_D18 _ xxx. Because it is used as gpio, mx6q_pad_eim_d181_gpio_3_18 is used,Add it to the board-mx6q_sabresd.h.Static iomux_v3_cfg_t mx6q_sabresd_pads [] = {....Mx6q_pad_eim_d1820.gpio_3_18....}Then add# Defi

Core. Double Click IP Core to configure it. Choose Import XPS settings,add zybo_zynq_def.xml,click OK. Download Link: Http://www.digilentinc.com/Data/Products/ZYBO/ZYBO_def.zip Now ZYNQ have been configured and fit for Zybo. Click Ok,go back to block design,click Add IP button again,insert GPIO IP core. Double Click GPIO core to config it: The configuration is as Follows:open Dual Channel,set, the b

The DHT11 is a temperature and humidity sensor with calibrated digital signal output. Precision humidity +-5%RH, temperature +-2℃, range humidity 20-90%rh, temperature 0~50℃. I bought a good package of modules, the top with a pull-up resistor, directly to the Raspberry Pi can be gray, purple, blue respectively represents data, 3.3V, 0V, to the Raspberry Pi 3,1,10 feet, respectively, corresponding to pin8,3.3v,0v. DHT11 and SCM Communication protocol is a single-line protocol (1-wire), in fact,

Stm32 has five groups of gpio ports and gpioa gpiob gpioc gpiod gpioe Each gpio port includes: Two configuration registers: gpiox_crl and gpiox_crh (32-bit ); Two data registers, gpiox_idr, and gpiox_odr (32-bit ); 1 Set bit/Reset register gpiox_bsrr (32-bit ); 1 reset register gpiox_brr (16-bit ); 1 lock register gpiox_lckr (32-bit ); Input mode: -Input float-Input pulling up-Input drop-down list-Analog In

application, it is not mandatory that the data receiver must respond to the eight-bit data sent, especially when both the master and slave are implemented using the gpio software simulation method, the programmer can specify the Data Transfer Length in advance, and the slave does not check nack, sometimes it can reduce system overhead. However, if the slave side is a hardware I2C requirement, it must be a standard nack. The master side is a

from this section, start using the ClassA20 class library to complete the operation of the peripheral functions, please firstHttps://github.com/tjCFeng/ClassA20Download the ClassA20 class library. The purpose of encapsulation is to simplify operations, just imagine what you need to do to set up Gpio registers directly in Linux? Basically compute the physical address, get the map address, understand the role of each register, set the corresponding bit

Pending Completion:Increase the location identification of the CA and complete the operation of WCDMA, CDMA and GSM decoding02/12 completion of the input form to complete the decoding of the basic frameworkEnter a logical Description:State indicates the status of the antenna, value 0~30Up/down indicates that the upper and lower antenna value 0~1:0 represents the upper antenna 1 means the lower antennaThe CA indicates whether the Gpio is a single band

Digital TV-dtv for us is already not a new thing, in the car electronic DTV mostly in the form of modules independent existence, is worthy. In the car market, customer demand is diverse, if the DTV also do car navigation main PCB up, or not flexible, do not have to DTV is different PCB board, which for after-sale maintenance, development is not a good way. DTV at home, we are generally through the remote control to operate, of course, now some Android TV box can be controlled by mobile phone, t

For push-pull output, open-drain output, multiplexed open-drain output, multiplexed push-pull outputAnd the difference between pull-in input, drop-down input, floating-space input, analog inputRecently, when looking at the data sheet, we found that there are 8 types of GPIO configurations in CORTEX-M3:(1) Gpio_mode_ain analog input(2) gpio_mode_in_floating floating Air input(3) GPIO_MODE_IPD drop-down input(4) Gpio_mode_ipu pull-up input(5) Gpio_mode_

; PORT: Ports + Intra-group sequence ; First angle bracket: function assignment, 0 for input, 1 for output, 2 for IO port, 6 for interrupt, rest indeterminate; The second angle bracket: built-in resistor, using 0, mark the internal resistance high impedance State, if 1 is the internal resistor pull, 2 represents the internal resistance pull down. The default state is used to indicate a resistor pull-up. Other data is invalid.; The third angle bracket: drive capability; Default rep drive capabili

On the AHB bus for high-speed operation of Io, the power-on default is input high, which supports GPDMA operation,1 only the pins on the GPIO0 and GPIO2 can generate interrupts,/exit0~3 special external interrupt pins.The 2p0.29/0.30 is very special either as input or as output.2.10 Special as the interrupt pin of the ISP.3GPIO can be in bytes, half word, word operation, so there are differences in the method of operation:Access in bytes: Direct access to Fioxpinn: where x is the port number, Op

in order to better coordinate the work between io , it is necessary to give the IO Port A different function at the appropriate time, an io The mouth can take on different tasks at different times, which is the multiplexing function of IO .Second, the principle of re-use:Each IO port is followed by a selector that, after the configuration of the corresponding registers (gpiox_afrh and gpiox_afrl), can be used to perform different functions, and this register is gpiox_afrh and gpiox_afrl.Three,

(SDA) to output modeSet_gpio_mode (GPD. Gpdcon,3,1); //Send ACK SignalIic_send_ack (); //set the IIC connection pin (SDA) to input modeSet_gpio_mode (GPD. Gpdcon,3,0); //read the data sent from the slave machine .Low =Iic_read_byte (); //set the IIC connection pin (SDA) to output modeSet_gpio_mode (GPD. Gpdcon,3,1); //Send Stop signalIic_stop (); return(High 8) |Low ;}experience in experiments:1. The ACK signal sent from the slave is not read, because the SDA line is not set to the input mode2.

tim_oc1polarityconfig (TIM5, tim_icpolarity_falling); //to be set to a falling edge, until the rising edge of the coming 39}40 41 }42}43 tim_clearitpendingbit (TIM5, TIM_IT_CC1 | Tim_it_update); 44 45} 6, pay attention to the red label part, well understand the beginning of the count and capture the difference between the value, there areSet Counter Register valueTim_oc1polarityconfig (TIM5, tim_icpolarity_falling); //Set Channel 1 input capture polarity the two functions are library

[Please indicate the source of the post: blog.csdn.net/lanmanck] The effect is similar to opening Notepad on the desktop. After you press the keyboard, you can enter it continuously. Environment: In an embedded Linux system, the keyboard is implemented by gpio scanning and simulated as a standard keyboard. The interface is displayed in lineedit of qt4. I will not talk much about the keyboard driver. Refer to the OMAP of input/keyboard.CodeIn QT,