MSP432的串口0收发

火辣西米秀

MSP432的串口0收发 [复制链接]

串口0的两个脚是P1.2,P1.3

代码：
#include <ti/devices/msp432p4xx/driverlib/driverlib.h>

uint8_t TXData = 1;
uint8_t RXData = 0;

/* UART Configuration Parameter. These are the configuration parameters to
* make the eUSCI A UART module to operate with a 115200 baud rate. These
* values were calculated using the online calculator that TI provides
* at:
* http://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/MSP430BaudRateConverter/index.html
*/
const eUSCI_UART_ConfigV1 uartConfig =
{
        EUSCI_A_UART_CLOCKSOURCE_SMCLK,          // SMCLK Clock Source
        13,                                      // BRDIV = 13
        0,                                       // UCxBRF = 0
        37,                                      // UCxBRS = 37
        EUSCI_A_UART_NO_PARITY,                  // No Parity
        EUSCI_A_UART_MSB_FIRST,                  // MSB First
        EUSCI_A_UART_ONE_STOP_BIT,               // One stop bit
        EUSCI_A_UART_MODE,                       // UART mode
        EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION,  // Oversampling
        EUSCI_A_UART_8_BIT_LEN                  // 8 bit data length
};

int main(void)
{
    /* Halting WDT  */
    MAP_WDT_A_holdTimer();

    /* Selecting P1.2 and P1.3 in UART mode and P1.0 as output (LED) */
    MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P1,
             GPIO_PIN2 | GPIO_PIN3, GPIO_PRIMARY_MODULE_FUNCTION);
    MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);
    MAP_GPIO_setOutputLowOnPin(GPIO_PORT_P1, GPIO_PIN0);

    /* Setting DCO to 24MHz (upping Vcore) */
    FlashCtl_setWaitState(FLASH_BANK0, 1);
    FlashCtl_setWaitState(FLASH_BANK1, 1);
    MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
    CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_24);

    /* Configuring UART Module */
    MAP_UART_initModule(EUSCI_A0_BASE, &uartConfig);

    /* Enable UART module */
    MAP_UART_enableModule(EUSCI_A0_BASE);

    /* Enabling interrupts */
    MAP_UART_enableInterrupt(EUSCI_A0_BASE, EUSCI_A_UART_RECEIVE_INTERRUPT);
    MAP_Interrupt_enableInterrupt(INT_EUSCIA0);
    MAP_Interrupt_enableSleepOnIsrExit();

    while(1)
    {

    }

}

/* EUSCI A0 UART ISR - Echos data back to PC host */
void EUSCIA0_IRQHandler(void)
{
    uint32_t status = MAP_UART_getEnabledInterruptStatus(EUSCI_A0_BASE);

    if(status & EUSCI_A_UART_RECEIVE_INTERRUPT_FLAG)
    {
        RXData = MAP_UART_receiveData(EUSCI_A0_BASE);
        MAP_UART_transmitData(EUSCI_A0_BASE, RXData);

                                
        MAP_Interrupt_disableSleepOnIsrExit();
    }

}

效果图：