Posted on March 01, 2017 at 23:27Thank's for the source code. I had decide me to use the 746Disco-Board for a simple display and control unit that not needs more than just some simple snippet's to handle the ethernet especial the BSD sockets of lwip in combination with FreeRTOS 8.2.1. The board's contained MEMS and audio features are not further used. The CAN bus on this board is nice but ST uses a buggy chip (r0p1) on my board, that run's into the ISR, even none breakpoint is placed their. The debuging of source code is a rumble and prevents to get fun. A workaround is available from Segger, but needs to replace the debugger firmware from ST with a J-Link OB variant. This is quite more versatile, faster and it's support's the hole bunch of free segger tools like 'systemview' to record and analyse the timing of each thread and timers in real-time. The disadvantage of the replacement is, that this firmware prevents the usage of sw4stm and all some nice free tools who is limited to use with the ST's Debugger.
I had used the CAN-Bus support with an STM32F407 and an older STM32F103V successfully. I had some various DMA issues but finaly, they can-bus works.
By the way, i will hope that you are not use the SDRAM because the clock speed is defined (216Mhz), is to high for the used dynamic memory. The PLL should be limited by 200Mhz instead to take ensure that the memory speed is in a valid range.
RCC_OscInitStruct.PLL.PLLN = 400; // 200Mhz
RCC_OscInitStruct.PLL.PLLQ = 7;
And later you can reduce the flash latency time at 200Mhz.
if (HAL_RCC_ClockConfig ( &RCC_ClkInitStruct, FLASH_LATENCY_6) != HAL_OK )
