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34 Threads found on Spi Dac Interface
In the code I see that TC72 CS pin and Serial_LCD_CLK pins uses the same RA5 pin. In PIC12F you don't have sufficient pins to interface Serial LCD, TC72 and dac. You have to use a PIC with sufficient pins. In the dac code link it uses hardware spi. So, only CS pin is defined. THE SDO, SDI and CLK pins of (...)
Hai, I recently interfaced the dac mcp 4921 with pic16f877a microcontroller using spi. THE Process is working fine, when i given the input directly to dac (ie : value as 600 without using forloop). but if i given the input using for loop and adding each time value 100 using macros the output suddenly increasing... (...)
Hi all, How to interface a 16bit dac with spi port with HMI or with PLC. Thanks and regards Itp
Try this: digitalWrite (slaveSelectPin, LOW); spi.transfer (highByte (commandPlusData)); spi.transfer (lowByte (commandPlusData)); digitalWrite (slaveSelectPin, HIGH); delay(80);
Although the protocol is not excatly spi, the device can be well driven by a spi master controller if you fill up the frame to 16 bit. Of course you don't need a dedicated spi interface and can perform port bit-banging instead, but the same is true for standard spi peripherals.
Every spi dac I have ever seen has a timing diagram somewhere in the datasheet, these are usually very simple devices (Clock, Data and a chip select). The I2C parts are a little more complex to bit bang but you save a pin. Regards, Dan.
hai everybody, i am looking for a dac ic with i2c/spi interface that will give 100mA current output , when i searched most of the ics will give only upto 20mA so if anyone knows dac that gives 100mA current output please help me
In a spi interface dac with sampline rate 100KSps, like the dac7654. How often should the data be written to the dac from a uC. The spi speed is usually in MHz. Do you write data, at say 1MHz. Do you have to wait for the dac to read out all the bytes or can you just (...)
part of code concerning dac 16 bits MAX541 ( C18 Mplab) #define Clock 0.25 // ?S at 16Mhz #define Ualim 5.00 #define ADC_Coeff 4.096/1024.0 // dac 16 bits spi ali=+5V output max==Vref=2.5V en DIP 8 #define MAX541 #ifdef MAX541 // VOut pin 1 // VR
Hello mehregan, The dac you have selected uses 3-Wire spi interface. In this 3-Wire spi mode you can only send data to your dac and cant read anything from your dac. Please make following connections: SDO pin of PIC to SDI pin of dac SDI pin of PIC to SDO pin of PIC (This (...)
895248952489523 Hello All, I am trying to interface dac MB86064 with FPGA, What I have understood from other posts is that I have to make control logic using FSM according to the data sheet of dac. It follows spi protocol. Can anyone please help me in what are the steps should I follow.
spi interface example
I need 8 dacs and I need that all 8 channel conversion time is maximal 1 microsecond. There are some 8 channel dacs which are spi, but conversion time from digital to analog is about 7-8 us... So, I wondered are there some 8 channel dac which could convert all channels in maximal 1us with spi serial (...)
It depends on the ADC. If it has an spi interface then u need an spi on the FPGA which u could find ready in EDK or on the internet ( If the ADC will be connected to the FPGA in parallel, then u don't need an interface u can just read the inputs directly. Other details on the operation of the ADC should be in (...)
hi.. ..i am a beginner and i tried to interface a msp430g2231 ic with the dac mcp 4812 in spi communication i gave the hardware connection as below msp430g2231 - mcp4812 P1.6------> SDI P1.5------>SCK P2.6------>CS GND---->Ldac and please check my code and tell me the mistakes. (...)
Hello, i am trying to have this circuit working. I have the Serial to Parallel Converter connected to the input pins of the dac (spi intead of just the parallel interface cause i prefer to use less pins of my microcontroller...). The dac is supplied by a DC DC converter (5 V -> +-12 V). I have already tested if everything is (...)
Hi, I am working on a project that interfaces a Virtex 5 with a high speed dac (AD9781). I will be controlling this dac through spi (serial port interface). At first I naively thought that I could just straight up connect my FPGA pins to the spi pins on the dac. Then (...)
I have used a MCP41010 single-channel digital potentiometer for generating sine waves up to 3KHz MCP41010 it has an spi interface so is easy to interface. Probably simpler and cheaper than a dac ?
In the past I used a MCP4101 digital pot which has an spi interface to generate sine waves of approx 2KHz MCP41010 not sure if it would work at 5KHz but worth considering the alternative is a dac - for example I used Integra development boards with Texas DSP processors and h
Joydeep, You seem to be using unbuffered opto signals to drive the spi interface. The edges will be quite slow and the dac can accept data rates up to 30MHz so I would certainly consider cleaning those up with a Schmitt buffers. It may not be the problem - there may be a software problem - you could test that by bypassing the optos and (...)
hello first... are you trying to send from FPGA to dac?, because in your post I can't see what are you trying to do. you should create a vhdl spi bus controller to send the data to the dac, search for similar topics in this forum and you will find help. in that program you have to send to values to the dac, the max (...)
Hello: I have been trying to interface an AD9777 dac to a BF561 EZ-KIT for too long. I have used the software that AD supplies, Labview 5.1 .. However, when I try to program the eval board it can affect changes on all the AD9777 registers except register 0, which contains a reset. Can I do writes directly from the spi (...)
can anyone provide the source code for spartan 3an adc and dac interface . ineed to study it , moreover i have the source code for 3e .will it work for 3an ? pls help its urgent . thanks in advance . yes, the communication with the ADC and dac modules are through spi. this is independent of the model of FPGA
Connect all the digital signals on the dac to the FPGA and the write an FPGA controller to send the data based on the timing of the dac and you will see the proper signal coming out. The issue with the AD9706 is that you need to change the setting of the dac via spi, you can do that either by adding a spi (...)
No need to go for a state machine. Take an spi controller from open cores. configure it for an 16 bit interface.
Hi It seems the Linux kernel 2.6 is already ported to your board. You may interface a ADC or dac through spi. If this is the case you need to learn Linux Device Driver.
Hi, I have a silly question about the microcontroller spi interface. Suppose there is a spi signal with first 4-bit as address, and last 8-bit as a dac code. I am wondering whether there are any peripheral devices that can convert this 12-bit spi to a parallel 4-bit address code, and a analog signal from (...)
If you are using microcontroller then you can probably connect your ADC/dac to the spi interface of MCU if your ADC/dac can support spi interface. Alternatively, you can also use polling method with the normal I/Os to generate clock.
My dac contains an spi interface How can I connect it to my PC? Then can I use MATLAB to send data to the dac?
Hi I agree that spi is used for configuration more than using it for data transfer. you can use the bus for each of the ADC ,dac and SDRAM for data transfer but of course you will use much more IO's But you can implement master for each slave at the cost of no of IO's used Salam Hossam Alzomor
hi..all..i am doing a project on electronic weighing machine.for that i am using analog devises AD7730 and PIC 16f877a mcu.While doing spi i can write and read the dac register of AD7730,which is 8 bit wide.But i cannt do it on mode reg of ad7730,which is 16-bit it possible to transmit/receive 16 bit data throuh 8 bit wide spi ?pls send it
hi, could anyone please suggest some uC's with DMA,USB,adc/dac (i saw a PIC with all but a spi interface.. anything with USB?) and anyone used JFFS2 as the flash filesystem.?..from what i gather FAT is a terrible compromise for Flash. or any other alternatives to flash? thank you.
Hi, The ADDS-21992-EZLITE is EXACLTY whay you need: Attributes: - ADSP-21992 DSP - 64K x 16-bit Static RAM - 4Mbits of Flash Memory - Analog input Circuitry - 8-channel 12-bit dac (AD5328) on spi interface - Encoder interface Circuitry - UART interface (RS-232) - CAN (...)
i think that´s not possible to find a 16 PARALLEL dac almost every dac works in serial mode/spi interface ... but if you are using an DSP, it should be no problem. Also possible is using a class D amplifier and sourcing it direct from the dsp ... for special dac´s for dsp´s look at