Search found 18 matches

I found that the compiler warned me that the condition while((DRDY!=0)); is always true
The compiler is correct. In the line below, you have DRDY defined
as a pin number:
#define DRDY PIN_A4
Lo ...

In my circuit, an ADC's /DRDY pin will pulse low when data is ready to retrieve and then returns high on the falling edge of the first subsequent SCLK, if data is not retrieved (SCLK held low), this p ...

Hello! I had successfully implemented an USB CDC with 18F4550 to retrieve data from a PIC24FJ by using a SPI interface, however, between each operation, at least 100us delay must be added to ensure th ...

I've downloaded the datasheet and it says it's a read only device, so why are you writing to it ?
below code cut from your OP..

spi_write(h);
delay_us(100);
spi_writ ...

Thank you, was being stupid this time....

However, there is an issue related to the SDI pin RF7, it seems RF7 is kept at output state even if I had manually set the tris to input followed by setup_ ...

http://i556.photobucket.com/albums/ss7/suvietrat/spi2.jpg
This is the timing diagram of an ADS1271 module outputting data in SPI format

If the above picture isn't showing up then use the link belo ...

Hello everyone!

I'm trying to initialise a spi interface as frame sync master and spi master(i.e, outputting both frame sync pulse and free-running serial clock). However, my problem is that alt ...

With any DDS work I have done the number of points in a full cycle is always a power of 2, generally 256 for crude 8-bit stuff, or 2^16 for fine (but slow)16-bit stuff. It is basically the length of ...

If the 480 points is over one sine wave, you really only need to calculate 120 points( first 90*)...
it's a 'cheat' I found on the web called 'magic sinewaves'.....years ago...
Well, I got enough pr ...

Hello!

I want to implement a software DDS with a PIC and a DAC chip.

I know the standard procedure involves generate phase first then put phase into a sin function.

However, when trying to ge ...

Thank you! Problem was solved after putting 1ms delay after before spi1 begin to write data out.

However, in my ADC datasheet, it says the device shifts data out on the falling edge and the use sh ...

Hi! I'm using a PIC24FJ128GA010 to interface with an ADC.

The PIC is using SPI slave is used to read from the ADC. The serial clock of both ADC and PIC is provided by a free-running external clock ...

is there a way that I could get the PIC simply sending 16-bit data over the SPI without sending 8-bit data twice with SPI set to 8 bit mode?
Yes, by writing to the PIC24 SFR registers directly. You h ...

I used a PIC24FJ128GA010 for my sensor project, I found that CCS compiler is able to set the SPI to 16-bit mode, however, spi_write command can only write 8-bit data, is there a way that I could get t ...

Hello! A little bit update! I find my problem, it seems there is a type mismatch: i send out binary data from PIC24FJ but print out hex number on USB, do you think that might be the cause of problem?