adc counters

The ADCTSC registers are shared between the ADC Driver and the touch-screen driver. How can one register be used when processing them? -- Linux general technology-Linux programming and kernel information. The following is a detailed description. You guys give me directions I wrote an ADC digital-to-analog conversion driver for the embedded linux test chamber, but I found that my

Normal through the file system access to the value of Ain serial port, you can use Fread and other file IO read/sys/bus/iio/devices/iio:device0/in_voltage*_raw content. But this requires high frequency access to the ADC is very inefficient, the data needs to be copied from the disk to the kernel process space, and then copied to the user process space, consuming unnecessary resources. This problem can be solved by memory innuendo, Mmap can realize the

ExampleThe order of the ADC1 rule channels is CH0,CH1,CH2,CH3,Do not start scan mode:In one-time conversion mode:Start ADC1, then1. Start converting CH1 (First channel of ADC_SQR)Stop when the conversion is complete, wait for the ADC to start the next time, and continue to convert from the first stepIn Continuous conversion mode:Start ADC1, then1. Start converting CH0 (First channel of ADC_SQR)Go back to the first step after the conversion is complete

DSP Basic Learning-ADC Synchronous samplingPeng2015-04-28 20:31:06In the DSP28027 Lauchpad learning process, the difference between synchronous sampling and sequential sampling of the ADC is a little bit of a study, here the main focus on the ADC synchronous sampling, ADC synchronous sampling has two different actual s

What can I do for someone else? This is a question I have been thinking about lately.Looking at the ADC Power monitoring code, I feel that the understanding of the ADC is not in place, there are many parts of the code do not understand. Such as:1. Why is the pin set to output when initializing?2. What value does the ADC collect, and what is the range?3. Why do I

I use the ADC081SD chip, Cpol:cs is pulled to low power sclk is high, Cpol for 1,cs was pulled to low power sclk for 0 o'clock, Cpol for 0;The Cpha:cs is pulled to the low level after the first clock edge is 0, and the second clock along the acquisition data is 1.When the corresponding acquisition data bits of the clock rise are stable, the rising edge is collected, and the clock falling along the corresponding acquisition data bits are collected along the falling edge.As shown in the SCLK, the

(); Memset (frameBuffer, BLACK, 2 * WIDTH * HEIGHT);/* Clear screen */DrawCross (lcdCalibPoints [1]. x, lcdCalibPoints [1]. y, COLOR );TFT_DrawString (40,130, "Tap green marker ");P [1] = getTouchTapSample10bit (); Memset (frameBuffer, BLACK, 2 * WIDTH * HEIGHT);/* Clear screen */DrawCross (lcdCalibPoints [2]. x, lcdCalibPoints [2]. y, COLOR );TFT_DrawString (20,180, "Tap green marker ");P [2] = getTouchTapSample10bit (); SetCalibrationMatrix (POINT *) lcdCalibPoints,/* Display coordinates */

Each ADC module of stm32 can switch to different input channels and perform conversion through an internal analog multi-channel switch. Stm32 is particularly added to multiple group conversion modes. After the program is configured, It can automatically sample and convert multiple analog channels one by one. There are two ways to divide the conversion group: rule Channel group and injection Channel group. Generally, up to 16 channels can be arranged

The 10-bit or 12-bit CMOS analog to digital converter (ADC) comprises of 10-channel analog inputs. It convertsThe analog input signal into 10-bit or 12-bit binary digital codes at a maximum conversion rate of 1 MSPs5 MHz A/D converter clock. A/D converter operates with On-Chip sample-and-hold function. ADC supports lowPower mode.Touch screen interface can control input pads (XP, XM, YP, and ym) to obtain x/

This article has been presented to: http://bibber.blog.sohu.com/162815791.htmlHow many bits is the ADC?12 GuestsHow many ADCs are there?One, 2 or more to 3, depending on the device, and each with multiple channels.About the channel:10.3.3 Channel SelectionThere are 16 multichannel channels. Transformations can be divided into two groups: regular and injected. A series of transformations in any order on any number of channels constitutes a group conver

First of all talk about the problem, feel this code Compose Studio is rather strange#include "Tft\tft_driver.h"File not found, unable to openNo include can use functions only under the same projectEach time you run the program results are differentAn example of using an ADC is given below:ADC Initialization function:void Configureadctempsensor (void) {/ * Configure ADC Temp Sensor Channel */ ADC10CTL1 = i

First look at the code that people think is "right" void Myadc_init (void) {//Clock enable Rcc_ahbperiphclockcmd (RCC_AHBPERIPH_GPIOA, enable); Rcc_apb2periphclockcmd (RCC_APB2PERIPH_ADC1, ENABLE); GPIO configuration Gpio_inittypedef PORT_ADC; PORT_ADC. Gpio_pin = gpio_pin_1 | gpio_pin_2 | Gpio_pin_3; PORT_ADC. Gpio_mode = Gpio_mode_an; PORT_ADC. GPIO_PUPD = Gpio_pupd_nopull; Gpio_init (Gpioa, AMP;PORT_ADC); ADC configuration Adc_inittypedef a

Assuming an existing set of Sigma-delta ADC output sequences, two methods for calculating the corresponding Snr are described below. The CIW window command where data is exported by cadence is: ocprint (? Output "Export directory/output file name" V ("/Saved circuit node"? Resultsdir "cadence Emulation Data Catalog/PSF"? Result "" Tran-tran ")? From the start time to the cut-off time? Step Step).Method One:The first method is to use the He Lenian "ana

The 1.stm32 uses a successive approximation analog digital approach, so what is successive approximation?The successive approximation is similar to the dichotomy, taking the 8-bit data as an example; When an analog amount is entered, the first half of the 8 digits, i.e. 1000 0000, is compared with the analog value, then becomes 1, less than the next bit; set the next one to 1, then compare, greater than 0, and less than the same. Until the two numbers are not large, stop comparing and output the

/* Songhan SN8P2711 2722 ADC initialization program and application instance */INIT_ADC: MOVA, #0XB2 // start the ADC circuit to enable AIN channel B0MOVADM, AMOVA, # 0XF0B0MOVADR,; fad = 1/2 Fcpu sets the ADC conversion rate; MOVA, # 0X1C for a pure analog input port; P4.2 3 4 for a simulated AD port B0MOVP4CON, a ret // --- application instance -----//*********

= ADC_InitStructure.ADC_NbrOfChannel = ADC_Init(ADC1, ADC_RegularChannelConfig(ADC1,ADC_Channel_0,,ADC_SampleTime_239Cycles5); ADC_RegularChannelConfig(ADC1,ADC_Channel_1,,ADC_SampleTime_239Cycles5); ADC_RegularChannelConfig(ADC1,ADC_Channel_2,,ADC_SampleTime_239Cycles5); ADC_RegularChannelConfig(ADC1,ADC_Channel_10 , ADC_RegularChannelConfig(ADC1,ADC_Channel_Vrefint, ADC_InjectedSequencerLengthConfig(ADC1, ADC_InjectedChannelConfig(ADC1,ADC

); determines whether the adswitch is over.Ret = adcdat0 0x3ff;, the value after normal ADC conversion. That's it. It's easy? Okay. You can only say that. Then, makefile: obj-m :=adc.o Then create a makemod. The Code is as follows: make -C /home/eastmoon/work/linux2.6.28/ M=`pwd` modules Then, you only need source makemod to compile it into buzzer. Ko. OK, the driver is like this, and then the application #include Then makefile: CC =

1. Normal converson Mode) The Normal conversion mode (auto_pst = 0, xy_pst = 0) is used for general ADC conversion, such as measuring the battery voltage through ADC. 2. Independent x/y position conversion mode (separate x/y position Conversion Mode) The independent X-axis/Y-axis coordinate conversion mode includes the x-axis mode and Y-axis mode. To obtain the X and Y coordinates, you must first coordinate

From: http://bbs.ednchina.com/BLOG_ARTICLE_225912.HTM Each ADC module of stm32 can switch to different input channels and perform conversion through an internal analog multi-channel switch. Stm32 is particularly added to multiple group conversion modes. After the program is configured, It can automatically sample and convert multiple analog channels one by one. There are two ways to divide the conversion group: rule Channel group and injection Chan

[Csharp]/*************************************** **************************** Program name: Mega_ADK ADC** Parameter count: None** Function: Send the voltage value (mv) collected by AD through the serial port)** Note: The target board is Maga adk and the mcu is ATmega 2560.** Author: Zhao Lulu** Version: v1.0** Modification time: 2012.8.17**************************************** **************************/# Define adPin A0Void setup (){Serial. begin (