void usbuart_init(void)
{
UART_PIN_SETUP();
periph_clock_enable(USBUART_CLK);
__asm__("nop"); __asm__("nop"); __asm__("nop");
uart_disable(USBUART);
/* Setup UART parameters. */
uart_clock_from_sysclk(USBUART);
uart_set_baudrate(USBUART, 38400);
uart_set_databits(USBUART, 8);
uart_set_stopbits(USBUART, 1);
uart_set_parity(USBUART, UART_PARITY_NONE);
// Enable FIFO
uart_enable_fifo(USBUART);
// Set FIFO interrupt trigger levels to 1/8 full for RX buffer and
// 7/8 empty (1/8 full) for TX buffer
uart_set_fifo_trigger_levels(USBUART, UART_FIFO_RX_TRIG_1_8, UART_FIFO_TX_TRIG_7_8);
uart_clear_interrupt_flag(USBUART, UART_INT_RX | UART_INT_RT);
/* Enable interrupts */
uart_enable_interrupts(UART0, UART_INT_RX| UART_INT_RT);
/* Finally enable the USART. */
uart_enable(USBUART);
//nvic_set_priority(USBUSART_IRQ, IRQ_PRI_USBUSART);
nvic_enable_irq(USBUART_IRQ);
}
void usbuart_init(void)
{
#if defined(BLACKMAGIC)
/* On mini hardware, UART and SWD share connector pins.
* Don't enable UART if we're being debugged. */
if ((platform_hwversion() == 1) && (SCS_DEMCR & SCS_DEMCR_TRCENA))
return;
#endif
rcc_peripheral_enable_clock(&USBUSART_APB_ENR, USBUSART_CLK_ENABLE);
UART_PIN_SETUP();
/* Setup UART parameters. */
usart_set_baudrate(USBUSART, 38400);
usart_set_databits(USBUSART, 8);
usart_set_stopbits(USBUSART, USART_STOPBITS_1);
usart_set_mode(USBUSART, USART_MODE_TX_RX);
usart_set_parity(USBUSART, USART_PARITY_NONE);
usart_set_flow_control(USBUSART, USART_FLOWCONTROL_NONE);
/* Finally enable the USART. */
usart_enable(USBUSART);
/* Enable interrupts */
USBUSART_CR1 |= USART_CR1_RXNEIE;
nvic_set_priority(USBUSART_IRQ, IRQ_PRI_USBUSART);
nvic_enable_irq(USBUSART_IRQ);
/* Setup timer for running deferred FIFO processing */
USBUSART_TIM_CLK_EN();
timer_reset(USBUSART_TIM);
timer_set_mode(USBUSART_TIM, TIM_CR1_CKD_CK_INT,
TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP);
timer_set_prescaler(USBUSART_TIM,
rcc_ppre2_frequency / USBUART_TIMER_FREQ_HZ * 2 - 1);
timer_set_period(USBUSART_TIM,
USBUART_TIMER_FREQ_HZ / USBUART_RUN_FREQ_HZ - 1);
/* Setup update interrupt in NVIC */
nvic_set_priority(USBUSART_TIM_IRQ, IRQ_PRI_USBUSART_TIM);
nvic_enable_irq(USBUSART_TIM_IRQ);
/* turn the timer on */
timer_enable_counter(USBUSART_TIM);
}
