Posted on February 13, 2014 at 05:38I have a bit of code to output some debug using SWOvoid swo_init(){ uint32_t SWOSpeed = SWO_SPEED; uint32_t SWOPrescaler = (SystemCoreClock / SWOSpeed) - 1; // SWOSpeed in Hz CoreDebug->DEMCR = CoreDebug_DEMCR_TRC...

Posted on February 13, 2014 at 05:31I am using a STM32F405RG as a USB host. I've implemented the ST USB Host library (version 2.1.0) in a way that supports multiple devices behind a hub. In order to seemingly support unlimited devices (as much as po...

Posted on January 12, 2014 at 01:29I am using a STM32F4's internal CRC peripheralMy test sample data works against the code available at http://www.opensource.apple.com/source/xnu/xnu-1456.1.26/bsd/libkern/crc32.cSample data is { 0xA1, 0x11, 0xC0, 0...

Posted on January 04, 2014 at 03:13The reference manual for the STM32F4 states that the polynomial for the CRC generator is 0x4C11DB7I must change it to 0x0B5D0A7D or else my application will not work, as I am spoofing another deviceIs there a trick...

Posted on November 19, 2013 at 10:13I am using a STM32F205RG, the USB HS interface as a USB device, it's HID, but it must use 0x84 for interrupt-in endpoint, not 0x81.I am using the ST USB library.If I attempt to use 0x84, a crash happens inside usb...