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[分享] 【SAMV71】串口通信

2016-6-21 11:41:09 3583

0 官方库提供了两个串口的例程选择其中一个编译下，看看效果发送r 然后就是长期的卡死了，可能程序与板子哪还存在问题，检查程序串口显示到实现据此修改例程，建立自己的程序初始化串口引脚 ioport_set_pin_peripheral_mode(USART0_RXD_GPIO, USART0_RXD_FLAGS); ioport_set_pin_peripheral_mode(USART0_TXD_GPIO, USART0_TXD_FLAGS); ioport_set_pin_peripheral_mode(PIN_USART0_SCK_IDX,PIN_USART0_SCK_FLAGS); ioport_set_pin_peripheral_mode(PIN_USART0_CTS_IDX,PIN_USART0_CTS_FLAGS); 进一步进行波特率UART配置等 static void configure_console(void) { const usart_serial_options_t uart_serial_options = { .baudrate = CONF_UART_BAUDRATE, #ifdef CONF_UART_CHAR_LENGTH .charlength = CONF_UART_CHAR_LENGTH, #endif .paritytype = CONF_UART_PARITY, #ifdef CONF_UART_STOP_BITS .stopbits = CONF_UART_STOP_BITS, #endif }; /* Configure console UART. / sysclk_enable_peripheral_clock(CONSOLE_UART_ID); stdio_serial_init(CONF_UART, &uart_serial_options); } 进行进一步UART模式配置 static void configure_usart(uint32_t ul_ismaster, uint32_t ul_baudrate) { sam_usart_opt_t usart_console_settings = { 0, US_MR_CHRL_8_BIT, US_MR_PAR_NO, US_MR_NBSTOP_1_BIT, US_MR_CHMODE_NORMAL, / This field is only used in IrDA mode. / 0 }; usart_console_settings.baudrate = ul_baudrate; / Enable the peripheral clock in the PMC. / sysclk_enable_peripheral_clock(BOARD_ID_USART); / Configure USART in SYNC. master or slave mode. / if (ul_ismaster) { usart_init_sync_master(BOARD_USART, &usart_console_settings, sysclk_get_peripheral_hz()); } else { usart_init_sync_slave(BOARD_USART, &usart_console_settings); } / Disable all the interrupts. / usart_disable_interrupt(BOARD_USART, ALL_INTERRUPT_MASK); / Enable TX & RX function. / usart_enable_tx(BOARD_USART); usart_enable_rx(BOARD_USART); / Configure and enable interrupt of USART. */ NVIC_EnableIRQ(USART_IRQn); } 比较奇怪的是进行具体模式配置前，ATMEL直接调用puts就可以进行串口输出了具体puts定义如图并没有涉及具体的寄存器，却能进行具体的串口输出，真奇怪，具体串口相关 0
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