ADRV9040 Multiple Channel Transmit Problem

Question

Thanks for the IIO implementation for the ADRV9040. 
 I have an ADRV904x evaluation board, hosted by a ZCU102, which is booted with 2023_r2, running IIO. The sample rate is 491.52 Msps. 
 I am trying to transmit using multiple channels. I can transmit a signal using IIO buffers for one transmit channel. If I try to use more than one transmit channel, then all of the transmit signals disappear. 
 I was having an issue with the similar ADRV9026, which Travis Collins helped me fix by using the pl_ddr_fifo_enable debug attribute on the tx_hpc device. However, that attribute does not exist on the ADRV9040 IIO interface. 
 Is there some IIO attribute that I need to enable for the ADRV9040 which would help with the multiple transmit problem? 
 Don Metzger

danmois · Accepted Answer

Hi Don, 
 
 Currently, the pl_ddr_fifo_enable attribute is present in the devicetree only, and it is enabled. 
 The multiple transmit problem is a limitation of IIO-Osc, that can be overcome by using another IIO client. iio_info will show that adrv904x_phy has all the 8 transmit channels exposed. 
 
 Regards, 
 George)

Partner Forums

Partner Libraries

Products Mentioned

Associated Drivers

ADRV9040 Multiple Channel Transmit Problem