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the first:in the hardware manual----Writing to a SPORTs SPx_TX register readies the SPORT for transmission.After the first bit of a word has been transferred, the SPORT generates the transmit interrupt.---is that mean if i want to send a data,the only thing i will do is put the data to SPx_TX? and then a interrupt will occure and i can send another data?? or i enable the sport and then send the data? the second: the tclk in the sport can be internal or external,i use the later.but i found that the tclk is unstable if the code is running,in addtion to stable with just power on!what is the reason? the sport is set like this: ar = 0x85e1; io(SP0_TCR) = ar; ar = 0x0027; io(SP0_TSCKDIV) = ar; Sport0 TX Interrupt Service Routine like this: ay1 = iopg; iopg = SPORT0_Controller_Page; ar = 0xff; io(SP0_TX) = ar; ar = 0x0f; io(SP0_TX) = ar; ar = 0x00; io(SP0_TX) = ar; iopg = ay1; rti; thank you much for your help! |
several question in sport0,please!
Started by ●October 26, 2004
