beaglebone adc

What is DMA.DMA (direct Memory access, directly memory access) is an important feature of all modern computers, allowing different speeds of hardware devices to communicate without relying on a large amount of interrupt load on the CPU. Otherwise, the CPU needs to copy each fragment of data from the source to the register and then write it back to the new location. In this time, the CPU is not available for other jobs. (Baidu Encyclopedia)DMA can be considered a data porter What is the use of DM

Transferred from: http://blog.csdn.net/shenbin1430/article/details/6065444 1. Target [52rd.com]Mobile phone camera module with ISP function module market trend and research and development direction. To be able to correctly understand the mobile phone camera module industry to provide technical and market basis. [52rd.com]2. Application principle of ISP in module [52rd.com]2.1 Functional Area [52rd.com]Regardless of the digital camera, camera or camera phone, the image data from the front-end se

I searched for emails from several friends in Foxmail and unfortunately found that my emails have been deleted. These mailboxes are especially important to me, so I tried my best to find them. When writing an email, input the first letter of an email address in the "recipient" address, and Foxmail can automatically complete the email address, so try to enter a few letters, and the result does not reach the goal, then I thought again that since Foxmail has the "auto-complete mailbox" function, i

half the maximum input voltage.The same principle can also be applied to the transformer coupling input circuit (see Figure 6), unless the transformer secondary has an intermediate tap, it can be grounded or connected to VCM.In this circuit, a small offset voltage error is generated due to mismatch between the two input resistors and/or mismatch of input bias currents at both ends. To minimize the offset error, a resistor can be connected between the two inputs of the instrumentation amplifier

-chip peripherals benefit from dual APB bus architecture There is a high speed NBSP;APB with a speed of up to cpu and the peripherals connected to the bus can run at a higher speed usb:12mbit/s usart:4.5mbit/s PI:N bsp;18mbit/s IIC:NBSP;NBS p;400khz Gpio:18mhz Flip pwm: timer 72MHz input Some functional innovations on on-chip peripherals for the most common motor control,stm32 in MCU applications nbsp Built-in timers and

CMOS is integrated in the semiconductor material called metal oxide, the working principle is not the essential difference, it is the photoelectric conversion using the photosensitive diode (photodiode), The principle of this conversion is similar to that of solar cells, the stronger the light, the stronger the electricity, and the weaker the light and the weaker the electricity. According to this principle, the image is converted into digital data, and the main difference is that the digital d

stm32f101c8 stm32f101r8 stm32f101v8 stm32f101rb stm32f101vbEnhanced Type: Stm32f103c8 stm32f103r8 stm32f103v8 stm32f103rbstm32f103vb stm32f103ve stm32f103zethe role of the STM32 seriesIntroduction Arm's high-performance "cortex-m3" Core 　　1.25dmips/mhz, and ARM7TDMI only 0.95dmips/mhzBest -in-Class peripherals 　　1μs Dual 12-bit adc,4 megabits per second uart,18 megabits per second spi,18mhz I/O rollover speed　　 Low power consumption 　　 consumes 36mA

Today Debug stm32f103 ADC, using the ADC1 single conversion mode for two-channel ad sampling, found that there are two channels of annoyance. The relevant ad operation code is as follows:voidadc_start_convert (uint8_t ch) {ADC1-GT;SMPR2 = (ADC1-GT;SMPR2 0xfffffff8) |7; ADC1-GT;SQR3 = (ADC1-GT;SQR3 0xffffffe0) |ch; Adc_softwarestartconvcmd (ADC1, ENABLE);} uint8_t Adc_is_convert_finish (void){ if((adc1->sr0x02) ==0) return 0; Else retu

. such as 16-bit data 35f3h, starting at offset position 0000, then 0000 of the 8-bit data f3,0001 is 35, the string is not the rule store.CS (Code snippet): This is where the code is.ES (additional segment): not yet studiedSeveral address issuesLogical address = Segment Address: Offset address (16 bits, upper and lower bounds 0/ffff), such as 2,500:0100Physical Address = Segment Address shift left one (right 0) + offset address (20 bit)④ Basic variablesEQU ConstantsDB single byte, DW double byt

. The HAL implementor may need to being aware of these, but not the end user. See these Wikipedia articles: GPIO I²C I²S McASP SLIMbus Spi Audio Signal PathThese terms is related to the signal path, which audio data follows from a application to the transducer, or VICE-VERSA. Adc Analog to Digital Converter, a module this converts an Analog signal (continuous in both time and amplitude) to a digital Signal

read the book. The directory provides a basic overview of some information. (Figure 2-1) Generally, introduction is very short and has no content. skip this step. Description, Here is (2-2 ). Next let's take a look at the description: (Figure 2-2) We can get the following basic information: 1. The frequency reaches 72 MHz, and the flash memory in the chip is 128 K and sram20k. 2. Two APB buses (clock) 3. Two 12-bit ADCs are generally carried by MCU, but not by MPU. 4. Peripheral Bus I2C SPI us

Saber parts Gallery: assembled by sublater (categorized by Chinese meaning, which contains special parts and necessary comments) ★Characterized parts libraries Feature Element ─ ── DX Diode-diode (Zener, power) 2017-bjt transistor (darington dington, power, array) ├ ── JFET/MOS/power MOS ─ ── SCR/IGBT, switch analog switch device ├ ── Analog multiplexer simulates Multi-Channel Switch Opamp Comparator ├ ── ADC, DAC Javas── fuse, resettable fus

For all tasks, the running time t of the task should be less than the time interval under any circumstances. That is, if a task cannot be completed within a specified period of time, the task will be aborted, especially for interrupt programs running in query mode. For example, such code is unreliable: // Wait until the adswitch ends (check adci)While (adcon adci) = 0 ); In some cases, the system may be suspended due to the following reasons: A. If the initialization of the

Address: http://blog.csdn.net/qianjin0703/article/details/6387662 0. Special terms 1. Physical Structure 2. System Architecture This article uses the Freescale IMX platform codec alc5625 as an example. 0. Special terms ASLA-advanced sound Linux architecture OSS-previous Linux audio architecture, replaced by ASLA and compatible Codec-coder/Decoder I2S/PCM/ac97-codec and audio communication protocol/interface/bus between CPU Dai-digital audio interface is actuall

control applications. Main features and advantages: 1. maximum operating frequency (MHz): 24 MHz 2. Working voltage (VCC): 4.0? 5.5 VCC 3. compatible with MCS-51TM products (alternative models) No. 5: aducm360 (Chinese) fire heat :??? Monthly search volume: 725 This MCU is a low-cost integrated arm cortex m3 and dual-channel Σ-delta ADC launched by ADI. The power consumption precision simulation microcontroller should know that the advantage of ADI i

Set (ax) = 5, (BX) = 3, (CX) = 2, run the following program section, (ax) = lop: ror BX, cl adc ax, BX loop lop how does ror shift? Thank you. Ror is the circular right shift command, which shifts the entire right of the destination operand from the number of digits specified by the source operand. The removed bits are refilled to the left blank bits and moved to the flag bits. For example, in this question, (BX) = 3, (CX) = 2 3 is converted to a b

. Uda1341_l3_address (0x14 + 2 ); Uda1341_l3_data (0x21 ); Uda1341_l3_address (0x14 + 2 ); Uda1341_l3_data (0xc1); // status 1, gain of DAC 6 dB, gain of ADC 0db, ADC non-inverting, DAC non-inverting, single speed playback, ADC-off DAC-on Uda1341_l3_address (0x14 + 0 ); Uda1341_l3_data (0x0f); // 00 FFFF: volume control (6 bits)-14db Uda1341_l3_address (0x14 + 0

0. Special terms 1. Physical Structure 2. System Architecture This article uses the Freescale IMX platform codec alc5625 as an example. 0. Special terms ASLA-advanced sound Linux architecture OSS-previous Linux audio architecture, replaced by ASLA and compatible Codec-coder/Decoder I2S/PCM/ac97-codec and audio communication protocol/interface/bus between CPU Dai-digital audio interface is actually I2S/PCM/ac97 DAC-digit to analog conversion ADC-anal

API is getting started ?, The second parameter is the name of the file to be determined. If a non-0 value is returned in the list, otherwise, 0 is returned. Another problem is the PE File validation. Most PE files do not use the checksum field validation value in the file header. However, some PE files, such as key system service program files and driver files, must be correct, otherwise, the system loader rejects loading. The Checksum In the PE Header can be calculated using the export functio

channel to be switched. In the code above, we used channel 0 and Channel 1, and measured the two channels through software switching. Of course, you can also measure the voltage of the eight channels here, just add a few lines of code. Below is: Qianfan's channel 0 is connected to GND, and channel 1 is connected to VCC. Is it easy to measure the voltage in this way. How to Use stm32 adc Conversion AD calibration is performed first, and only one