MSP432 serial port 0 transceiver

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MSP432 serial port 0 transceiver [Copy link]

The two pins of serial port 0 are P1.2 and 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();
}

}

Effect picture: