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TMS320F28035 LIN配置SCI问题

sam liu
Intellectual 561 points

Hi,

我现在用28035的LIN口配置SCI模式，测试中发现数据格式设置时有点问题。

1、配置为N-8-1和N-8-2格式时（即LinaRegs.SCIGCR1.bit.PARITYENA = 0;）数据发送和接收都正常；

2、配置为O-8-1或E-8-1格式时（即LinaRegs.SCIGCR1.bit.PARITYENA = 1; LinaRegs.SCIGCR1.bit.PARITY= 0;或LinaRegs.SCIGCR1.bit.PARITY= 1;），用串口助手监控时发现下发数据返回值对应不上？

LIN配置 SCI测试.docx

  • 0
    TI__Guru**** 252096 points

    请您试一下

    void Init(void)
{

EALLOW; // This is needed to write to EALLOW protected registers

LinaRegs.SCIGCR0.bit.RESET = 0; //Into reset
LinaRegs.SCIGCR0.bit.RESET = 1; //Out of reset

LinaRegs.SCIGCR1.bit.SWnRST = 0; //Into software reset

//SCI Configurations
LinaRegs.SCIGCR1.bit.COMMMODE = 0; //Idle-Line Mode
LinaRegs.SCIGCR1.bit.TIMINGMODE = 1; //Asynchronous Timing
LinaRegs.SCIGCR1.bit.PARITYENA = 1; //Parity Check
LinaRegs.SCIGCR1.bit.PARITY = 1; //Even Parity
LinaRegs.SCIGCR1.bit.STOP = 0; //One Stop Bit
LinaRegs.SCIGCR1.bit.CLK_MASTER = 1; //Enable SCI Clock
LinaRegs.SCIGCR1.bit.LINMODE = 0; //SCI Mode
LinaRegs.SCIGCR1.bit.SLEEP = 0; //Ensure Out of Sleep
LinaRegs.SCIGCR1.bit.MBUFMODE = 1; //Buffered Mode
LinaRegs.SCIGCR1.bit.LOOPBACK = 1; //Internal Loopback
LinaRegs.SCIGCR1.bit.CONT = 1; //Continue on Suspend
LinaRegs.SCIGCR1.bit.RXENA = 1; //Enable RX
LinaRegs.SCIGCR1.bit.TXENA = 1; //Enable TX

//Ensure IODFT is disabled
LinaRegs.IODFTCTRL.bit.IODFTENA = 0x0;

//Set transmission length
LinaRegs.SCIFORMAT.bit.CHAR = 7; //Eight bits
LinaRegs.SCIFORMAT.bit.LENGTH = 7;

//Set baudrate
LinaRegs.BRSR.bit.SCI_LIN_PSL =194; //9600 bps for SYSCLKOUT = 60 MHz
LinaRegs.BRSR.bit.M =5;

LinaRegs.SCIGCR1.bit.SWnRST = 1; //bring out of software reset

EDIS;


while(LinaRegs.SCIFLR.bit.IDLE == 1);

LinaRegs.LINTD0.bit.TD0 = 0x01;
LinaRegs.LINTD0.bit.TD1 = 0x02;
LinaRegs.LINTD0.bit.TD2 = 0x03;
LinaRegs.LINTD0.bit.TD3 = 0x04;
LinaRegs.LINTD1.bit.TD4 = 0x05;
LinaRegs.LINTD1.bit.TD5 = 0x06;
LinaRegs.LINTD1.bit.TD6 = 0x07;
LinaRegs.LINTD1.bit.TD7 = 0x08;

}

  • 0 回复 Susan Yang
    Intellectual 561 points
    你好，我的初始化程序如下配置，只是用的单收发，没有用BUFFER，只对 LinaRegs.SCIGCR1.bit.PARITYENA 和 LinaRegs.SCIGCR1.bit.PARITY 做更改，两个都配置为0时（N-8-1）通讯正常，配置了奇偶校验则回复数据有问题，在CCS中查看发送数据是正确的，只是实际串口助手收到的数据不正确。

    EALLOW;
    LinaRegs.SCIGCR0.bit.RESET = 0; // Into reset
    LinaRegs.SCIGCR0.bit.RESET = 1; // Out of reset
    LinaRegs.SCIGCR1.bit.SWnRST = 0; // Into software reset

    LinaRegs.SCIGCR1.bit.COMMMODE = 0; // Idle-Line Mode
    LinaRegs.SCIGCR1.bit.TIMINGMODE = 1; // Asynchronous Timing
    LinaRegs.SCIGCR1.bit.PARITYENA = 1; // No Parity Check
    LinaRegs.SCIGCR1.bit.PARITY = 1; // Odd Parity
    LinaRegs.SCIGCR1.bit.STOP = 0; // One Stop Bit
    LinaRegs.SCIGCR1.bit.CLK_MASTER = 1; // Enable SCI Clock
    LinaRegs.SCIGCR1.bit.LINMODE = 0; // SCI Mode
    LinaRegs.SCIGCR1.bit.SLEEP = 0; // Ensure Out of Sleep
    LinaRegs.SCIGCR1.bit.MBUFMODE = 0; // No Buffers Mode
    LinaRegs.SCIGCR1.bit.LOOPBACK = 0; // External Loopback
    LinaRegs.SCIGCR1.bit.CONT = 1; // Continue on Suspend
    LinaRegs.SCIGCR1.bit.RXENA = 1; // Enable RX
    LinaRegs.SCIGCR1.bit.TXENA = 0; // Enable TX

    LinaRegs.IODFTCTRL.bit.IODFTENA = 0x0;

    LinaRegs.SCIFORMAT.bit.CHAR = 7; //Eight bits
    LinaRegs.SCIFORMAT.bit.LENGTH = 7; //One byte

    LinaRegs.BRSR.bit.SCI_LIN_PSL = 194;
    LinaRegs.BRSR.bit.M = 5;

    LinaRegs.SCIGCR1.bit.SWnRST = 1;
    EDIS;