单片机TM4C123学习（五）：UART的使用

1.配置UART

void uart_configure(uint32_t baud)
{
    // Enable the GPIO Peripheral used by the UART
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
    // Enable UART0
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

    // Configure GPIO Pins for UART mode
    ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
    ROM_GPIOPinConfigure(GPIO_PA1_U0TX);
    ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    
    // Use the internal 16MHz oscillator as the UART clock source
    UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC);
    
    // Initialize the UART for console I/O
    UARTStdioConfig(0, baud, 16000000);
}

2.输出

void uart_printf(const char *pcString, ...)
{
    va_list vaArgP;

    //
    // Start the varargs processing.
    //
    va_start(vaArgP, pcString);

    UARTvprintf(pcString, vaArgP);

    //
    // We're finished with the varargs now.
    //
    va_end(vaArgP);
}

uart_printf("demo begin 
");

UC1701CharDispaly(0, 0,"your name:");
    
UC1701CharDispaly(2, 0,"your number:");
    

// 从串口得到一个字符
UARTCharGet(UART0_BASE);
// 如果PC有发送字符
if(UARTCharsAvail(UART0_BASE))
{
}
// 清零
memset(name,' ',sizeof(name));