[参考译文] MSP430FR6007：在 20 位地址空间中使用 DMA 失败

Other Parts Discussed in Thread: MSP430FR6007

https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1598773/msp430fr6007-dma-usage-in-20bit-address-room-fails

器件型号： MSP430FR6007

您好！

我谈到这个主题、很遗憾、 论坛已经结束：MSP430FR6007：crc_table function - MSP 低功耗微控制器论坛 — MSP 低功耗微控制器 — TI E2E 支持论坛 

我现在把它煮到 20 位地址室,当 Im 64kb 地址室与 CRC 模块相关时,我的 DMA 输入器工作,

不幸的是、当我进入扩展地址室 0x10000 时、它会杀死系统：

基本问题：MSP430FR6007 DMA 模块是否支持扩展地址空间？

    DMA_initParam cfg = {
        DMA_CHANNEL_0,                 // channelSelect
        DMA_TRANSFER_BLOCK,            // transferModeSelect
        static_cast<uint16_t>(length), // transferSize
        DMA_TRIGGERSOURCE_0,           // triggerSourceSelect
        DMA_SIZE_SRCBYTE_DSTBYTE,      // transferUnitSelect
        DMA_TRIGGER_RISINGEDGE         // triggerTypeSelect
    };

    DMA_init(&cfg);

    // Use proper 20-bit address handling
    // Convert pointers to 32-bit first to avoid truncation
    uint32_t volatile src_addr = reinterpret_cast<uint32_t>(src);
    uint32_t volatile dst_addr = reinterpret_cast<uint32_t>(dst);

    // Set the Source Address (20-bit)
    __data20_write_long((uint32_t)&DMA0SA, src_addr & 0xFFFFF);

    // Reset bits before setting them
    HWREG16(DMA_BASE + DMA_CHANNEL_0 + OFS_DMA0CTL) &= ~(DMASRCINCR_3);
    HWREG16(DMA_BASE + DMA_CHANNEL_0 + OFS_DMA0CTL) |= DMA_DIRECTION_INCREMENT;

    // Set the Destination Address (20-bit)
    __data20_write_long((uint32_t)&DMA0DA, dst_addr & 0xFFFFF);

    HWREG16(DMA_BASE + DMA_CHANNEL_0 + OFS_DMA0CTL) &= ~(DMADSTINCR_3);
    HWREG16(DMA_BASE + DMA_CHANNEL_0 + OFS_DMA0CTL) |= (DMA_DIRECTION_UNCHANGED << 2);

    // Clear DMA interrupt flag and start transfer
    DMA0CTL &= ~DMAIFG;
    DMA_enableTransfers(DMA_CHANNEL_0);
    DMA_startTransfer(DMA_CHANNEL_0);

    // Poll for completion
    while (!(DMA0CTL & DMAIFG))
    {
      __no_operation();
    }

    DMA_disableTransfers(DMA_CHANNEL_0);