C++ (Cpp) uart_clear_interrupt_flag示例

示例#1

文件： usbuart.c 项目： molnarkares/blackmagic

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);
}

示例#2

文件： uart.c 项目： insane-adding-machines/unicore-mx-examples

/*
 * uart0_isr is declared as a weak function. When we override it here, the
 * unicore-mx build system takes care that it becomes our UART0 ISR.
 */
void uart0_isr(void)
{
	uint8_t rx;
	uint32_t irq_clear = 0;

	if (uart_is_interrupt_source(UART0, UART_INT_RX)) {
		rx = uart_recv_one_byte();
		uart_send_one_byte(rx);
		irq_clear |= UART_INT_RX;
	}

	uart_clear_interrupt_flag(UART0, irq_clear);
}

示例#3

文件： traceswo.c 项目： ChuckM/blackmagic

void traceswo_init(void)
{
	periph_clock_enable(RCC_GPIOD);
	periph_clock_enable(TRACEUART_CLK);
	__asm__("nop"); __asm__("nop"); __asm__("nop");

	gpio_mode_setup(SWO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, SWO_PIN);
	gpio_set_af(SWO_PORT, 1, SWO_PIN); /* U2RX */

	uart_disable(TRACEUART);

	/* Setup UART parameters. */
	uart_clock_from_sysclk(TRACEUART);
	uart_set_baudrate(TRACEUART, 800000);
	uart_set_databits(TRACEUART, 8);
	uart_set_stopbits(TRACEUART, 1);
	uart_set_parity(TRACEUART, UART_PARITY_NONE);

	// Enable FIFO
	uart_enable_fifo(TRACEUART);

	// Set FIFO interrupt trigger levels to 4/8 full for RX buffer and
	// 7/8 empty (1/8 full) for TX buffer
	uart_set_fifo_trigger_levels(TRACEUART, UART_FIFO_RX_TRIG_1_2, UART_FIFO_TX_TRIG_7_8);

	uart_clear_interrupt_flag(TRACEUART, UART_INT_RX | UART_INT_RT);

	/* Enable interrupts */
	uart_enable_interrupts(TRACEUART, UART_INT_RX | UART_INT_RT);

	/* Finally enable the USART. */
	uart_enable(TRACEUART);

	nvic_set_priority(TRACEUART_IRQ, 0);
	nvic_enable_irq(TRACEUART_IRQ);

	/* Un-stall USB endpoint */
	usbd_ep_stall_set(usbdev, 0x85, 0);

	gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO3);
}