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RA4M2 IO操作损坏单片机

SnowFly

瑞萨技术支持工程师，你们好，目前在使用过程中有个问题请教一下，下图是所使用芯片RA4M2AB3(48PIN)的IO口，误操作了P003和P004的寄存器位，导致单片机损坏了，不知道原因为何，P0口没有外引的端口寄存器位不能操作？有遇到过的来交流一下。

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  • 0

    请问您做了怎样的操作？

    MCU的损坏通常来说，应该是由于操作所引起的过压或过流造成的

  • 0 in reply to Xu ***

    损坏的问题已经查明原因确实是后级的驱动导致的，

    现在有了新的问题，串口+DAM发送数据的问题：

    R_DMAC_Reset(&g_transfer2_sci4_tx_ctrl,(void*)uiSendBuffer_Addr,(void*)&R_SCI4->TDR,usSendLen);

    SEND_ENABLE; //使能发送
    R_BSP_SoftwareDelay(1,BSP_DELAY_UNITS_MILLISECONDS);
    /* Enable the DTC to handle incoming transfer requests. */

    WDT_Clear();
    //err = R_DMAC_SoftwareStart(&g_transfer2_sci4_tx_ctrl, TRANSFER_START_MODE_SINGLE);
    /* 手动触发传输数据寄存器空中断*/
    R_SCI4->SCR_b.TE = 0;
    R_SCI4->SCR |= (0xA0);

    只有第一帧数据发送是正常的，后面的帧都少了第一个字节“27”的数据，这个原因是什么呢，暂时试了很多没有找到原因是什么，请给予支持。

    [11:48:05.335]发→◇27 03 00 00 00 0A C2 CB □
    [11:48:05.392]收←◆27 03 14 00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF 00 00 3F 80 C2 B4
    [11:48:06.587]发→◇27 03 00 00 00 0A C2 CB □
    [11:48:06.644]收←◆03 14 00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF 00 00 3F 80 C2 B4
    [11:48:07.892]发→◇27 03 00 00 00 0A C2 CB □
    [11:48:07.948]收←◆03 14 00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF 00 00 3F 80 C2 B4
    [11:48:08.965]发→◇27 03 00 00 00 0A C2 CB □
    [11:48:09.023]收←◆03 14 00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF 00 00 3F 80 C2 B4

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  • 0 in reply to Xu ***

    损坏的问题已经查明原因确实是后级的驱动导致的，

    现在有了新的问题，串口+DAM发送数据的问题：

    R_DMAC_Reset(&g_transfer2_sci4_tx_ctrl,(void*)uiSendBuffer_Addr,(void*)&R_SCI4->TDR,usSendLen);

    SEND_ENABLE; //使能发送
    R_BSP_SoftwareDelay(1,BSP_DELAY_UNITS_MILLISECONDS);
    /* Enable the DTC to handle incoming transfer requests. */

    WDT_Clear();
    //err = R_DMAC_SoftwareStart(&g_transfer2_sci4_tx_ctrl, TRANSFER_START_MODE_SINGLE);
    /* 手动触发传输数据寄存器空中断*/
    R_SCI4->SCR_b.TE = 0;
    R_SCI4->SCR |= (0xA0);

    只有第一帧数据发送是正常的，后面的帧都少了第一个字节“27”的数据，这个原因是什么呢，暂时试了很多没有找到原因是什么，请给予支持。

    [11:48:05.335]发→◇27 03 00 00 00 0A C2 CB □
    [11:48:05.392]收←◆27 03 14 00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF 00 00 3F 80 C2 B4
    [11:48:06.587]发→◇27 03 00 00 00 0A C2 CB □
    [11:48:06.644]收←◆03 14 00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF 00 00 3F 80 C2 B4
    [11:48:07.892]发→◇27 03 00 00 00 0A C2 CB □
    [11:48:07.948]收←◆03 14 00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF 00 00 3F 80 C2 B4
    [11:48:08.965]发→◇27 03 00 00 00 0A C2 CB □
    [11:48:09.023]收←◆03 14 00 00 00 00 00 00 00 00 00 00 00 00 FF FF FF FF 00 00 3F 80 C2 B4

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