Posted on November 05, 2015 at 17:59I'm interfacing with TI CC1101, it need to check MISO pin to low before start SPI transaction.Shall I change MISO pin to AF mode to Input mode before I read, and then change it back to AF mode to start SPI.Is  the...

Posted on October 15, 2015 at 16:34I'm porting SDcard code from FatFS_uSD_FreeRTOS for stm32446_eval in STM32Cube to stm32f4-discovery.Reading blocks seems fine, but writing blocks failed.I debugged with GDB. when write it returned crc failed.here i...

Posted on October 15, 2015 at 04:12I'm using HAL libraries, its HAL_Delay with FreeRTOS will cause HardFaultmy stack backtrace:&sharp0  HardFault_Handler ()    at ./system/stm32f4xx_it.c:83&sharp1  <signal handler called>&sharp2  0x0800343a in xTask...