Teensy 3.1
Anyone know what high SPI clock rates have been proven to work for...
8 bit mode
Transfer TX+RX, DMA mode.
DMA receive and dummy-DMA transmit (to clock in MISO)
SPI clock at 20MHz? 40MHz? more?
One interrupt when DMA TX and RX are complete.
Transfer sizes: large, like 16-32KB or more per DMA (primarily for reading media).
I searched the forum and SD card topics, but nothing found.
steve
Anyone know what high SPI clock rates have been proven to work for...
8 bit mode
Transfer TX+RX, DMA mode.
DMA receive and dummy-DMA transmit (to clock in MISO)
SPI clock at 20MHz? 40MHz? more?
One interrupt when DMA TX and RX are complete.
Transfer sizes: large, like 16-32KB or more per DMA (primarily for reading media).
I searched the forum and SD card topics, but nothing found.
steve