TMS570LC43x开发套件的SCI3当作UART使用时，不能发送数据，请问这是为什么？

上个图，我没见过这个开发套件，是不是有什么跳线设置之类的。或者拨码开关之类的，一般开发板会有一些跳线设置，另外这个作为UART是可以接收数据吗？如果可以接收，应该就可以发送

TMS570LC43x的开发套件有两种，你用的是HDK还是Lauchpad。
SCI3默认的端口功能不是SCI功能，你需要正确配置引脚复用。在Halcogen的PINMUX页里，是否已正确配置？
在SCI3的标签页下，是否把SCI3的TX和RX都配置成了SCI功能口，输入输出功能是否正确配置？
                                                                         喝可乐是一种生活！！！

果然是高手啊！问题已解决，谢谢您的帮助，有问题多联系

tms570lc43xx HDK sic如下配置 ，波特率是多少？串口工具接收到数据乱码？
  /** - bring SCI1 out of reset */
    sciREG1->GCR0 = 0U;
    sciREG1->GCR0 = 1U;

    /** - Disable all interrupts */
    sciREG1->CLEARINT    = 0xFFFFFFFFU;
    sciREG1->CLEARINTLVL = 0xFFFFFFFFU;

    /** - global control 1 */
    sciREG1->GCR1 =  (uint32)((uint32)1U << 25U)  /* enable transmit */
                  | (uint32)((uint32)1U << 24U)  /* enable receive */
                  | (uint32)((uint32)1U << 5U)   /* internal clock (device has no clock pin) */
                  | (uint32)((uint32)(1U-1U) << 4U)  /* number of stop bits */
                  | (uint32)((uint32)0U << 3U)  /* even parity, otherwise odd */
                  | (uint32)((uint32)0U << 2U)  /* enable parity */
                  | (uint32)((uint32)1U << 1U);  /* asynchronous timing mode */

    /** - set baudrate */
    sciREG1->BRS = 259U;  /* baudrate */

    /** - transmission length */
    sciREG1->FORMAT = 8U - 1U;  /* length */

    /** - set SCI1 pins functional mode */
    sciREG1->PIO0 = (uint32)((uint32)1U << 2U)  /* tx pin */
                 | (uint32)((uint32)1U << 1U); /* rx pin */

    /** - set SCI1 pins default output value */
    sciREG1->PIO3 = (uint32)((uint32)0U << 2U)  /* tx pin */
                 | (uint32)((uint32)0U << 1U); /* rx pin */

    /** - set SCI1 pins output direction */
    sciREG1->PIO1 = (uint32)((uint32)0U << 2U)  /* tx pin */
                 | (uint32)((uint32)0U << 1U); /* rx pin */

    /** - set SCI1 pins open drain enable */
    sciREG1->PIO6 = (uint32)((uint32)0U << 2U)  /* tx pin */
                 | (uint32)((uint32)0U << 1U); /* rx pin */

    /** - set SCI1 pins pullup/pulldown enable */
    sciREG1->PIO7 = (uint32)((uint32)0U << 2U)  /* tx pin */
                 | (uint32)((uint32)0U << 1U); /* rx pin */

    /** - set SCI1 pins pullup/pulldown select */
    sciREG1->PIO8 = (uint32)((uint32)1U << 2U)  /* tx pin */
                 | (uint32)((uint32)1U << 1U);  /* rx pin */

    /** - set interrupt level */
    sciREG1->SETINTLVL = (uint32)((uint32)0U << 26U)  /* Framing error */
                      | (uint32)((uint32)0U << 25U)  /* Overrun error */
                      | (uint32)((uint32)0U << 24U)  /* Parity error */
                      | (uint32)((uint32)0U << 9U)  /* Receive */
                      | (uint32)((uint32)0U << 8U)  /* Transmit */
                      | (uint32)((uint32)0U << 1U)  /* Wakeup */
                      | (uint32)((uint32)0U << 0U);  /* Break detect */

    /** - set interrupt enable */
    sciREG1->SETINT = (uint32)((uint32)0U << 26U)  /* Framing error */
                   | (uint32)((uint32)0U << 25U)  /* Overrun error */
                   | (uint32)((uint32)0U << 24U)  /* Parity error */
                   | (uint32)((uint32)1U << 9U)  /* Receive */
                   | (uint32)((uint32)0U << 1U)  /* Wakeup */
                   | (uint32)((uint32)0U << 0U);  /* Break detect */

    /** - initialize global transfer variables */
    g_sciTransfer_t[0U].mode   = (uint32)0U << 8U;
    g_sciTransfer_t[0U].tx_length = 0U;
    g_sciTransfer_t[0U].rx_length = 0U;

    /** - Finaly start SCI1 */
    sciREG1->GCR1 |= 0x80U;

VCLK = 80 Mhz baudrate = 19200 我计算错了，嘻嘻

所以还是直接拿HalCogen配好哈~~
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Best Regards,
SZ