小编Leo*_* K.的帖子

我有一个SAM4s Xplained,想要使用UART1,但无法找到示例或帮助.我尝试了自己,但它不起作用.

到目前为止,这是我的代码:

conf_uart.h

#include "asf.h" //uart.h etc. included here
#include <sam4s_xplained.h>

#define UART_SERIAL_BAUDRATE        9600
#define UART_SERIAL_CHANNEL_MODE   UART_MR_CHMODE_AUTOMATIC //UART_MR_CHMODE_NORMAL
#define UART_SERIAL_MCK            240000000UL //CHIP_FREQ_CPU_MAX (tired both!)
#define UART_SERIAL_MODE         UART_MR_PAR_NO

void uart_custom_init(void);

conf_uart.c

#include "conf_uart.h"

uint8_t received_byte;

void uart_custom_init(void) {
    sysclk_init();

    const sam_uart_opt_t uart_console_settings = {
       UART_SERIAL_BAUDRATE,
       UART_SERIAL_CHANNEL_MODE,
       UART_SERIAL_MCK,
       UART_SERIAL_MODE
    };

    uart_init(UART1,&uart_console_settings);      //Init UART1

    uart_enable_rx(UART1);                     //Enable RX (receiving)
    uart_enable_tx(UART1);                     //Enable TX (transmitting)
    uart_enable(UART1);                     //Enable UART1

    uart_enable_interrupt(UART1,UART_IER_RXRDY);   //Interrupt reading ready
    NVIC_EnableIRQ(UART1_IRQn);

}

void UART1_Handler() {
   uint32_t dw_status = uart_get_status(UART1);

   if(dw_status & UART_SR_RXRDY) { …