DmaDataPendingApiConfiguration 是否启用数据挂起api,默认禁用; DmaBufferSwitchApiConfiguration 是否启用数据buffer切换api,默认禁用; DmaVersionInfoApi 是否启用版本信息api,默认禁用; DmaMaxTransactionSetPerChannel 用于指定每个通道最大的传输集个数,默认为1; DmaInitApiMode 用于指定初始化api的运行等级为SUPERVISORMOD...
==>计数取决于 DMA 缓冲区大小和 GPIF 数据宽度。 计算公式如下 计数= [(生产者缓冲区大小(位))/数据总线宽度] - 1 ==>因为您使用的是 16 位,所以应该是 16 位、 计数= [(Producer_Buffer_size(bytes))/2] - 1 ==> 请告诉我们每次切换时丢失的数据量。 您可以向 GPIF 发送递...
Before committing that buffer in DMA callback, copy that buffer to another local buffer. After exiting the dma callback, print the buffer contents on an UART terminal in your app thread. In this way you can see what data is received from the GPIF side. Regards, Hemanth Like 2,266 0...
AI代码解释 1.staticDAC_HandleTypeDef DacHandle;2.staticDAC_ChannelConfTypeDef sConfig;3.4.sConfig.DAC_SampleAndHold=DAC_SAMPLEANDHOLD_DISABLE;5.sConfig.DAC_Trigger=DAC_TRIGGER_T6_TRGO;6.sConfig.DAC_OutputBuffer=DAC_OUTPUTBUFFER_ENABLE;7.sConfig.DAC_ConnectOnChipPeripheral=DAC_CHIPCONNECT_DISABLE;...
也就是外设是源地还是目的地 */ uint32_t DMA_BufferSize; /*设置传输大小*/ ...
18.3.4.8.4 Buffer Switch数据流从一个缓冲区到另一个缓冲区的重定向应由软件开关以及自动硬件开关...
_((section (".RAM_D3"))) uint8_t g_spiRxBuf[SPI_BUFFER_SIZE]; #elif defined (__ICCARM__) /* MDK ***/ #pragma location = ".RAM_D3" uint8_t g_spiTxBuf[SPI_BUFFER_SIZE]; #pragma location = ".RAM_D3" uint8_t g_spiRxBuf[SPI_BUFFER_SIZE]; #endif #endif /* *** ...
switch(__even_in_range(DMAIV,16)) { case0:break; case2: // DMA0IFG = DMA Channel 0 //__delay_cycles(2048); if(DMAnum%2==1) { __no_operation(); __data16_write_addr((unsignedshort) &DMA0DA,(unsignedlong) &buffer); //更改地址 ...
最后,Device 通过总线地址Z,发出DMA读请求(PCIe Memeory Read),接着IOMMU将总线地址翻译为物理地址Y 去 读写物理内存 DMA Buffer. 编程示例: struct device *dev; /* device for DMA mapping */ struct sk_buff *skb; dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE); /* tx_desc 是网...
u8 switchbuf=0; //标记当前使用的是哪个缓冲区,0:使用u1rxbuf;1:使用u2rxbuf u8 USART2_TX_FLAG=0; //USART2发送标志,启动发送时置1 u8 USART2_RX_FLAG=0; //USART2接收标志,启动接收时置1 (2) 初始化串口GPIO外设、串口中断: void UART2_Init(u32 baudrate) ...