void *dma_alloc_coherent(struct device *dev,size_t size, dma_addr_t *handl,gfp_t gfp); 返回DMA缓冲的虚拟地址,handle返回总线地址 void *dma_free_coherent(struct device *dev,size_t size, dma_addr_t ); void *dma_alloc_writecombine(struct device *dev,size_t size, dma_addr_t *handl,gf...
I'm trying to use ADC peripheral with DMA but I can't set DMA transfersize field. I'm trying to use channel 0 of DMA and channel 1 of ADC and I'm using peripheral to memory transfertype. (LPC1788)All seems fine,but... in debugger i see corretly set burst, src/dst, etc bits ...
Esp32-s3 i2s with dma transfer size Posted: Tue Jan 26, 2021 11:11 pm by Baldhead Hi, Someone from espressif team could tell me if the i2s dma hardware problem of esp32 was solved on esp32-s3 ? The i2s dma transfer are only 32 bits yet on esp32-s3 ? I would like to have a...
Introduction The proposal is add a new type of DMA callback (or possibly modify the current DMA callback function), adding a new uint32_t transferred: typedef void(* dma_callback_with_length_t) (const struct device *dev, void *user_data,...
MICRO-CONTROLLER DMA OPERATION WITH ADJUSTABLE WORD SIZE TRANSFER AND ADDRESS ARRAY/INCREASEPROBLEM TO BE SOLVED: To provide a micro-controller direct memory access(DMA) unit allowing single reading of a source address in a larger word size and allowing writing in multiple sub-word sizes to a ...
/** Transfer size*/#define GPDMA_DMACCxControl_TransferSize(n) (((n&0xFFF)<<0))/** Source burst size*/#define GPDMA_DMACCxControl_SBSize(n)(((n&0x07)<<12))/** Destination burst size*/#define GPDMA_DMACCxControl_DBSize(n)(((n&0x07)<<15))/** Source transfer width*/#...
MICRO-CONTROLLER DMA OPERATION WITH ADJUSTABLE WORD SIZE TRANSFER AND ADDRESS ARRAY/INCREASEPROBLEM TO BE SOLVED: To provide a micro-controller direct memory access(DMA) unit allowing single reading of a source address in a larger word size and allowing writing in multiple sub-word sizes to a ...
摘要: PROBLEM TO BE SOLVED: To provide a micro-controller direct memory access(DMA) unit allowing single reading of a source address in a larger word size and allowing writing in multiple sub-word sizes to a target address.收藏 引用 批量引用 报错 分享 ...