[参考译文] MSP430FR2633：串行端口复用为自动波特率检测模式(LIN)的问题

https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1043486/msp430fr2633-the-problem-of-serial-port-multiplexing-into-automatic-baud-rate-detection-mode-lin

尊敬的团队：

关于中断帧头的检测、当当前执行以下配置时、可以正确检测到中断：

Tsynbrk = 13、Tsyndel = 1/5/10

但有两种配置不会检测中断：

Tsynbrk = 13、Tsyndel = 14

Tsynbrk = 26、Tsyndel = 1

以下是配置代码：

const tUARTPort g_myLINPort =
{
.pbReceiveCallback = &LINreceiveHandler,
.pbErrorCallback = &LINerrorHandler,
.peripheralParameters.selectClockSource = EUSCI_A_UART_CLOCKSOURCE_SMCLK,//EUSCI_A_UART_CLOCKSOURCE_UCLK, //EUSCI_A_UART_CLOCKSOURCE_SMCLK,
.peripheralParameters.clockPrescalar = 6, //26,
.peripheralParameters.firstModReg = 8, //0,
.peripheralParameters.secondModReg = 0x11, //0xB6,
.peripheralParameters.parity = EUSCI_A_UART_NO_PARITY,
.peripheralParameters.msborLsbFirst = EUSCI_A_UART_LSB_FIRST,
.peripheralParameters.numberofStopBits = EUSCI_A_UART_ONE_STOP_BIT,
.peripheralParameters.uartMode = EUSCI_A_UART_AUTOMATIC_BAUDRATE_DETECTION_MODE,//EUSCI_A_UART_AUTOMATIC_BAUDRATE_DETECTION_MODE
.peripheralParameters.overSampling = EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION //EUSCI_A_UART_LOW_FREQUENCY_BAUDRATE_GENERATION//EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION
};

void LIN_GPIO_Init(void)
{
P1OUT = (0);
P1DIR = (0);//(GPIO_PIN0 | GPIO_PIN6 | GPIO_PIN7);
P1SEL0 = (GPIO_PIN4 | GPIO_PIN5); //(GPIO_PIN2 | GPIO_PIN3 | GPIO_PIN4 | GPIO_PIN5);
P1SEL1 = (0);

LIN_EN_POUT |= LIN_EN_PIN;
LIN_EN_PDIR |= LIN_EN_PIN;
LIN_EN_ON;
}

void LIN_Init(void)
{
LIN_GPIO_Init();
UART_openPort(&g_myLINPort);
}

void UART_openPort(const tUARTPort *pPort)
{
UART_closePort();
g_pUARTPort = pPort;
UCA0CTLW0 |= UCSWRST; //reset UART0

MAP_EUSCI_A_UART_init(
UART__EUSCI_A_PERIPHERAL,
(EUSCI_A_UART_initParam*)&(g_pUARTPort->peripheralParameters)
);
UCA0CTLW0 |=UCBRKIE; //打开break 中断
UCA0CTLW0 &= ~UCDORM;//Not dormant. All received characters will set UCAxRXIFG
MAP_EUSCI_A_UART_enable(UART__EUSCI_A_PERIPHERAL);
MAP_EUSCI_A_UART_clearInterrupt(
UART__EUSCI_A_PERIPHERAL,
EUSCI_A_UART_RECEIVE_INTERRUPT_FLAG
);
MAP_EUSCI_A_UART_enableInterrupt(
UART__EUSCI_A_PERIPHERAL,
EUSCI_A_UART_RECEIVE_INTERRUPT
);
MAP_EUSCI_A_UART_enableInterrupt(
UART__EUSCI_A_PERIPHERAL,
EUSCI_A_UART_BREAKCHAR_INTERRUPT
);
g_UARTStatus = eUARTIsIdle;
}

此致