2014-01-25 12:34 PM
Hi,
I am trying to sample some data using DMA and the internal ADC and send the same data , still using DMA to an external DAC using the SPI Internface, through an optoisolation barrier. It all works great, I need 1MS/s and this is not a problem. Still I need to qualify the data using a NSS line and TI Mode works fine, but the lack of wait states makes my task hard. The NSS is released on the 14th byte and re-issued on the 15th. Most of the DACs (I have been using DAC8311 for a while) need some time between the sync signal and the new data, so the NSS line needs to be inactive for a while between the subsequent data. I could not find any suitable DAC. Is the interface not suitable for such a task or am I missing something? Thanks Fabio2014-11-24 06:46 AM
Hi Fabio,
Same question as Blaz. How did you configure the SPI? Do you require any additional code to start the transfer? Thank you for your answers, Franck2014-11-24 06:48 AM
Or did sending a word to the DMA controller may be sufficient to enable an SPI transaction?
2014-11-26 02:24 AM
Hi Blaz,
I ask again my question: How did you configure the SPI? Do you require any additional code to start the transfer? Thanks for your reply. Franck