MSP432评测8-----串口0收发

1万 · 2020-4-18 19:09

本帖最后由 Cjy_JDxy 于 2020-4-18 19:12 编辑

今晚搞了一下串口0收发。
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：

工程：

UART.rar (1.88 MB)