MAX_DMASIZE
#define ESP_MAX_DMASIZE MAX_DMASIZE
rxdma->dd_limit = DMA_ENDALIGN(char *, dma_buffers[0]+MAX_DMASIZE);
char dma_buffer1[MAX_DMASIZE+DMA_ENDALIGNMENT],
dma_buffer2[MAX_DMASIZE+DMA_ENDALIGNMENT],
if (len > MAX_DMASIZE)
char the_dma_buffer[MAX_DMASIZE+DMA_ENDALIGNMENT], *dma_buffer;
if (size > MAX_DMASIZE)
tsize = MAX_DMASIZE;