diff options
| -rw-r--r-- | hw/bsp/stm32f407g_disc1/board_stm32f407g_disc1.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/hw/bsp/stm32f407g_disc1/board_stm32f407g_disc1.c b/hw/bsp/stm32f407g_disc1/board_stm32f407g_disc1.c index 8c47e2a3c..3c1ebc11f 100644 --- a/hw/bsp/stm32f407g_disc1/board_stm32f407g_disc1.c +++ b/hw/bsp/stm32f407g_disc1/board_stm32f407g_disc1.c @@ -58,11 +58,24 @@ void board_init(void) // Init the LED on PD14 RCC->AHB1ENR |= RCC_AHB1ENR_GPIODEN; - GPIOD->MODER = GPIO_MODER_MODE14_0; + GPIOD->MODER |= GPIO_MODER_MODE14_0; // USB Clock init + // PLL input- 16 MHz (HSI clock) + // VCO input- 1 to 2 MHz (2 MHz, M = 8) + // VCO output- 100 to 432 MHz (144 MHz, N = 72) + // Main PLL out- <= 180 MHz (18 MHz, P = 8, not used; HSI used as system clk.) + // USB PLL out- 48 MHz (Q = 3) + RCC->PLLCFGR = (3 << RCC_PLLCFGR_PLLQ_Pos) | (8 << RCC_PLLCFGR_PLLP_Pos) \ + | (72 << RCC_PLLCFGR_PLLN_Pos) | (8 << RCC_PLLCFGR_PLLM_Pos); + RCC->CR |= RCC_CR_PLLON; + RCC->AHB2ENR |= RCC_AHB2ENR_OTGFSEN; // USB Pin Init + // PA10- ID, PA11- DM, PA12- DP + // PC0- Power on + GPIOD->MODER |= GPIO_MODER_MODE10_1 | GPIO_MODER_MODE11_1 | GPIO_MODER_MODE12_1; + GPIOA->AFR[1] |= (10 << GPIO_AFRH_AFSEL10_Pos) | (10 << GPIO_AFRH_AFSEL11_Pos) | (10 << GPIO_AFRH_AFSEL12_Pos); } |