hello, i have stm32f765vit6 board. The board uses an external crystal of 8mhz, I edited the bootloader configuration and qgc recognized it. However, the fw configuration step is based on fmuv5. I edited STM32_BOARD_XTAL to 8000000ul and PLL as shown
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Clocking *************************************************************************/
/* The flysae v2 board provides the following clock sources:
*
* X301: 8 MHz crystal for HSE
*
* So we have these clock sources available within the STM32
*
* HSI: 16 MHz RC factory-trimmed
* HSE: 8 MHz crystal for HSE
*/
#define STM32_BOARD_XTAL 8000000ul
#define STM32_HSI_FREQUENCY 16000000ul
#define STM32_LSI_FREQUENCY 32000
#define STM32_HSE_FREQUENCY STM32_BOARD_XTAL
#define STM32_LSE_FREQUENCY 0
/* Main PLL Configuration.
*
* PLL source is HSE = 8,000,000
*
* PLL_VCO = (STM32_HSE_FREQUENCY / PLLM) * PLLN
* Subject to:
*
* 2 <= PLLM <= 63
* 192 <= PLLN <= 432
* 192 MHz <= PLL_VCO <= 432MHz
*
* SYSCLK = PLL_VCO / PLLP
* Subject to
*
* PLLP = {2, 4, 6, 8}
* SYSCLK <= 216 MHz
*
* USB OTG FS, SDMMC and RNG Clock = PLL_VCO / PLLQ
* Subject to
* The USB OTG FS requires a 48 MHz clock to work correctly. The SDMMC
* and the random number generator need a frequency lower than or equal
* to 48 MHz to work correctly.
*
* 2 <= PLLQ <= 15
*/
/* Highest SYSCLK with USB OTG FS clock = 48 MHz
*
* PLL_VCO = (8,000,000 / 4) * 216 = 432 MHz
* SYSCLK = 432 MHz / 2 = 216 MHz
* USB OTG FS, SDMMC and RNG Clock = 432 MHz / 9 = 48 MHz
*/
#define STM32_PLLCFG_PLLM RCC_PLLCFG_PLLM(4)
#define STM32_PLLCFG_PLLN RCC_PLLCFG_PLLN(216)
#define STM32_PLLCFG_PLLP RCC_PLLCFG_PLLP_2
#define STM32_PLLCFG_PLLQ RCC_PLLCFG_PLLQ(9)
#define STM32_VCO_FREQUENCY ((STM32_HSE_FREQUENCY / 4) * 216)
#define STM32_SYSCLK_FREQUENCY (STM32_VCO_FREQUENCY / 2)
#define STM32_OTGFS_FREQUENCY (STM32_VCO_FREQUENCY / 9)
to ensure 48 MHz clock for OTG and 432 MHz. When connecting to qgc, I get Serial Link Error Link a: (Port: \.\COM6) A device attached to the system is not functioning. Can anyone help me?
