Posted on November 05, 2014 at 20:30
I would like to set SPI1 (PB4->MISO and PB3->SCK) in slave mode and output with CLK generated by TIM1Are there any obsticles I am unaware? Vpp voltage drops from 3,3V to about 2V when I connect PE9 to PB3. :\Thank you!More info:I have a working SPI1 and SPI2 synchronization (one master, second slave, just about 10ns delay), and triggering on timer interrupts. SLEEPONEXIT enable. Disabled SYSTICK timer. But (input) capture interrupts ruin everything. I would like this TIM1 as CLK to work as I can set DMA earlier and then SPI can do its job on time! #spi1 #tim1
I need to have 2xSPI synchronized and also synchronized with some timers.
Unusual use of TIM1. (STM32F401VC, discovery board)I use TIM1 in repeat and one pulse mode to generate 8 CLK for 1 byte of SPII have a working 10MHz 8 clock pulses on pin PE9.I would like to set SPI1 (PB4->MISO and PB3->SCK) in slave mode and output with CLK generated by TIM1Are there any obsticles I am unaware? Vpp voltage drops from 3,3V to about 2V when I connect PE9 to PB3. :\Thank you!More info:I have a working SPI1 and SPI2 synchronization (one master, second slave, just about 10ns delay), and triggering on timer interrupts. SLEEPONEXIT enable. Disabled SYSTICK timer. But (input) capture interrupts ruin everything. I would like this TIM1 as CLK to work as I can set DMA earlier and then SPI can do its job on time! #spi1 #tim1
Posted on November 05, 2014 at 22:11
Thank you clive1, for this and other answer you left on forum. (Use it all the time)
Good question! I need to focus focus.
MY BAD I had wrong setting for SPI (master instead of slave). :\Back to work now :) I think it is doable.CPOL=0, CPHA=1, 0x7a on picture:Thank you clive1, for this and other answer you left on forum. (Use it all the time)
