显示2次成功，然后一直失败

2012-11-21 15:08:53 4319

0 使用68013的slave FIFO模式来传输数据，上位机发送数据，下位可以准确收到，但是下位机给上位机发送数据，则显示2次成功，然后一直失败，弄了好久，不知其原因。初始化代码如下： void TD_Init( void ) { CPUCS = 0x12; IFCONFIG = 0x43; PORTACFG = 0x40; SYNCDELAY; FIFOPINPOLAR = 0x00; // set all slave FIFO interface pins as active low PKTEND OR SLOE SLWR LOW AVTIVE SYNCDELAY; REVCTL = 0x03; // enable the external master SYNCDELAY; //reset the fifos FIFORESET = 0x80; SYNCDELAY; FIFORESET = 0x02; SYNCDELAY; FIFORESET = 0x04; SYNCDELAY; FIFORESET = 0x06; SYNCDELAY; FIFORESET = 0x08; SYNCDELAY; FIFORESET = 0x00; SYNCDELAY; PINFLAGSAB = 0x00; // PINFLAGSAB = 0xE0; FLAGA - indexed, FLAGB - EP6 FF ； SYNCDELAY; PINFLAGSCD = 0x00; // PINFLAGSCD = 0x08; FLAGC - EP2 EF, FLAGD - indexed； SYNCDELAY; // config the endpoints direction EP1OUTCFG = 0xA0; //enable and bulk type EP1INCFG = 0xA0; SYNCDELAY; // see TRM section 15.14 EP2CFG = 0xA0; SYNCDELAY; EP8CFG = 0xE0; SYNCDELAY; EP4CFG = 0x00; SYNCDELAY; EP6CFG = 0x00; SYNCDELAY; OUTPKTEND = 0X82; //ARMing endpoint 2, perform OUTPKTEND 4 times since EP2 is 4x buffered SYNCDELAY; OUTPKTEND = 0X82; SYNCDELAY; OUTPKTEND = 0X82; SYNCDELAY; OUTPKTEND = 0X82; SYNCDELAY; EP2FIFOCFG = 0x10; //EP IS AUTOOUT=0 AUTOIN =1 ZEROLEN=1 WORDIDE=0 SYNCDELAY; EP8FIFOCFG = 0x08; //EP IS AUTOOUT=0 AUTOIN =1 ZEROLEN=1 WORDIDE=0 SYNCDELAY; INPKTEND = 0x08; SYNCDELAY; INPKTEND = 0x08; SYNCDELAY; EP8AUTOINLENH = 0x02; //set the packet size 512 SYNCDELAY; EP8AUTOINLENL = 0x00; SYNCDELAY; EP2BCL = 0x80; // arm EP2OUT by writing byte count w/skip. SYNCDELAY; EP2BCL = 0x80; SYNCDELAY; } 复制代码 0
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0 FIFO端点在Auto-In模式可以如下，数据手册也有说道: 1. Configure bits IFCONFIG[7:4] to define the behavior of the interface clock. 2. Set bits IFCFG1:0=11. 3. Set REVCTL.0 and REVCTL.1 to ‘1’. 4. Configure EPxCFG. 5. Reset the FIFOs. 6. Set bit EPxFIFOCFG.3=1. 7. Set the size through the EPxAUTOINLENH registers.

2012-11-21 15:12:55 评论举报 1^# xiangwangzihui

0 下位机传到PC，属于IN传输，首先要确认IN Endpoint配置是否有问题。你可以设置成AUTOIN模式，EPxAUTOINLENH来设置要传输的数据大小。

2012-11-21 15:19:33 评论举报 2^# xiangwangzihui