Earlier I was able to interface with a ADC (ADS7871) using the SPI interface provided by FTDI. It was really a struggle but that it is working quite good now. Now I am trying to interface with a DAC which is AD5420AREZ from Analog Devices ( http://www.analog.com/static/imported-files/data_sheets/AD5410_5420.pdf ). The pin assignments are as follows: ADBUS0 -> SK = Serial Clock - Connect to AD5420's SCLK (Pin-8). ADBUS1 -> DO = Serial Data Output (MOSI on slave device) - Connect to AD5420's SDIN (Pin-9). ADBUS2 ->DI = Serial Data Input (MISO on slave device) - Connect to AD5420's SDO (Pin-10). ADBUS3 -> CS = Chip Select for slave device - Not used on AD5420 so not connected ADBUS4 -> GPIO-1 - AD5420's /FAULT (Pin-3). ADBUS5 -> GPIO-2 - AD5420's CLEAR (Pin-6). ADBUS6 -> GPIO-3 - AD5420's LATCH (Pin-7). ADBUS7 -> GPIO-4 - Not used. These assignments should be working fine but please let me know if you see something wrong. My biggest problem is I do not know how to control GPIOL pins and there are no GPIOH pins for FTDI4232H. I have no idea how I can SET the LATCH/CLEAR signal or how I can read the /FAULT signal. The following is what I based my code on for reading from ADC. http://www.ftdichip.com/Support/Documents/AppNotes/AN_111_Programmers_Guide_for_High_Speed_FTCSPI_DLL.pdf Thanks --------------------------------------- Posted through http://www.EmbeddedRelated.com
FTDI4232H & DAC problem
Started by ●January 28, 2013