diff options
| -rw-r--r-- | stmhal/boards/STM32F7DISC/mpconfigboard.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/stmhal/boards/STM32F7DISC/mpconfigboard.h b/stmhal/boards/STM32F7DISC/mpconfigboard.h index c0e47c3ceb..a1dbc0f468 100644 --- a/stmhal/boards/STM32F7DISC/mpconfigboard.h +++ b/stmhal/boards/STM32F7DISC/mpconfigboard.h @@ -20,12 +20,19 @@ void STM32F7DISC_board_early_init(void); // HSE is 25MHz +// VCOClock = HSE * PLLN / PLLM = 25 MHz * 432 / 25 = 432 MHz +// SYSCLK = VCOClock / PLLP = 432 MHz / 2 = 216 MHz +// USB/SDMMC/RNG Clock = VCOClock / PLLQ = 432 MHz / 9 = 48 MHz #define MICROPY_HW_CLK_PLLM (25) -#define MICROPY_HW_CLK_PLLN (336) +#define MICROPY_HW_CLK_PLLN (432) #define MICROPY_HW_CLK_PLLP (RCC_PLLP_DIV2) -#define MICROPY_HW_CLK_PLLQ (7) +#define MICROPY_HW_CLK_PLLQ (9) -#define MICROPY_HW_FLASH_LATENCY FLASH_LATENCY_6 +// From the reference manual, for 2.7V to 3.6V +// 151-180 MHz => 5 wait states +// 181-210 MHz => 6 wait states +// 211-216 MHz => 7 wait states +#define MICROPY_HW_FLASH_LATENCY FLASH_LATENCY_7 // 210-216 MHz needs 7 wait states // UART config #define MICROPY_HW_UART1_TX_PORT (GPIOA) |