dmainitial.asm

采用TMS320VC5402实现一个16阶低通滤波器

  .title"dma"
;initialization dma 
     .def  init_dma 
     .text
init_dma: stm #0005h,55h; select dma1 channel
             stm #0041h,56h; set mcbsp1 receivetor as dma source adress  
             stm #0200h,56h; set dma destination adress
             stm #0100h-1,56h; directly transmit data numbers 
             stm #5000h,56h ; set mcbsp1 receive mode :a word per frame 
             stm #404dh,56h; set working frames mode ,unadjust source adress
             stm #20h,55h ;
             stm #0001h,57h; set 1 for unit dmidx0 regeiters 
             stm #0282h,54h; set dma1 as higher priority and enable dma1
               retd
               nop
              nop