Posted on May 20, 2013 at 18:12I have an external device that I need to measure it's utilization. I don't need code but I value the discussion and techniques offered. target is STM32F407The external device outputs a pulse. minimum pulse width is...
Posted on April 14, 2014 at 19:21Sounds like someone does not know the definition of feature creep. Kills more projects than anything.this sounds like a job for multiple processors. One to do the motor stuff which needs real time and another to do...
Posted on March 14, 2014 at 21:183) USB protocol version - FullSpeed = USB2 ( '' rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s )'' - from wikipedia)No,Full speed is 64 bytes max per packet 12MbsHigh speed it 512 max (except i...
Posted on March 14, 2014 at 21:12A virtual comm port is really a USB CDC device. No driver is necessary for Win/Linux/iOS. Driver is supplied. For Windows, you will need to create your own .inf file and google shows many templates.When you say da...
Posted on March 06, 2014 at 22:20That is the beauty of DMA, it is fire and forget.you configure the DMA to point to the buffer, tell it how many transfers, change CS, enable the DMA. Then reset CS in the DMA ISR 255 is far less than the limit of 6...
Posted on February 26, 2014 at 18:45There is no problem. Systick is the interval where the RTOS inspects whether or not it needs to do some task switching. But an interrupt may force the RTOS to switch before Systick expires. If USB sends data to...
