fifo_in_first[447:384]<={adc_data[15:8],dma_status[5:0],adc_data[71:54],adc_data[7:0],dma_status[5:0],adc_data[53:36]};// channels 2,3 and first two bytes of channel 0
fifo_in_first[383:320]<={{8{adc_data[17]}},dma_status[5:0],adc_data[107:90],{6{adc_data[17]}},adc_data[17:16],dma_status[5:0],adc_data[89:72]};// channels 4,5 and last two bytes of channel 0 , byte extended