/* Set STM32 to 48 MHz. */ void clock_setup(void) { rcc_clock_setup_in_hsi48_out_48mhz(); // Trim from USB sync frame crs_autotrim_usb_enable(); rcc_set_usbclk_source(RCC_HSI48); }
void cdcacm_target_init(void) { /* start HSI48 */ rcc_clock_setup_in_hsi48_out_48mhz(); /* use usb SOF as correction source for HSI48 */ crs_autotrim_usb_enable(); /* use HSI48 for USB */ rcc_set_usbclk_source(RCC_HSI48); /* usb HSI48 for system clock */ rcc_set_sysclk_source(RCC_HSI48); }
int main(void) { rcc_clock_setup_in_hsi48_out_48mhz(); crs_autotrim_usb_enable(); rcc_set_usbclk_source(HSI48); /* LED on for boot progress */ rcc_periph_clock_enable(RCC_GPIOC); gpio_mode_setup(GPIOC, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO7); gpio_set(GPIOC, GPIO7); usbd_device *usbd_dev = gadget0_init(&st_usbfs_v2_usb_driver, "stm32f072disco"); ER_DPRINTF("bootup complete\n"); gpio_clear(GPIOC, GPIO7); while (1) { usbd_poll(usbd_dev); } }
int main(void) { uint32_t i; rcc_periph_clock_enable(BOARD_RCC_LED); LED_ENABLE(); LED_BUSY(); /* Setup clock accordingly */ #ifdef GD32F103 rcc_clock_setup_in_hse_12mhz_out_120mhz(); #else #ifdef STM32F0 rcc_clock_setup_in_hsi48_out_48mhz(); rcc_periph_clock_enable(RCC_SYSCFG_COMP); SYSCFG_CFGR1 |= SYSCFG_CFGR1_PA11_PA12_RMP; rcc_periph_clock_enable(RCC_CRS); crs_autotrim_usb_enable(); rcc_set_usbclk_source(RCC_HSI48); #else rcc_clock_setup_in_hse_8mhz_out_72mhz(); #endif /* STM32F0 */ #endif /* GD32F103 */ rcc_periph_clock_enable(RCC_GPIOA); /* For USB */ /* STM32F0x2 has internal pullup and does not need AFIO */ #ifndef STM32F0 rcc_periph_clock_enable(BOARD_RCC_USB_PULLUP); rcc_periph_clock_enable(RCC_AFIO); /* For SPI */ #endif /* STM32F0 */ #if BOARD_USE_DEBUG_PINS_AS_GPIO gpio_primary_remap(AFIO_MAPR_SWJ_CFG_JTAG_OFF_SW_OFF, AFIO_MAPR_TIM2_REMAP_FULL_REMAP); #endif /* Setup GPIO to pull up the D+ high. (STM32F0x2 has internal pullup.) */ #ifndef STM32F0 gpio_set_mode(BOARD_PORT_USB_PULLUP, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, BOARD_PIN_USB_PULLUP); #if BOARD_USB_HIGH_IS_PULLUP gpio_set(BOARD_PORT_USB_PULLUP, BOARD_PIN_USB_PULLUP); #else gpio_clear(BOARD_PORT_USB_PULLUP, BOARD_PIN_USB_PULLUP); #endif /* BOARD_USB_HIGH_IS_PULLUP */ #endif /* STM32F0 */ usbcdc_init(); spi_setup(SPI_DEFAULT_CLOCK); /* The loop. */ while (true) { /* Wait and blink if USB is not ready. */ LED_IDLE(); while (!usb_ready) { LED_DISABLE(); for (i = 0; i < rcc_ahb_frequency / 150; i ++) { asm("nop"); } LED_ENABLE(); for (i = 0; i < rcc_ahb_frequency / 150; i ++) { asm("nop"); } } /* Actual thing */ /* TODO: we are blocked here, hence no knowledge about USB bet reset. */ handle_command(usbcdc_getc()); } return 0; }