Hello
I try to setup an isochronous endpoint to read data from an external application. As it did not work out, I setup the following minimal example which does not work either. The example should simply feed the computer with data.
WORD i; REVCTL = (1 << 1) | (1 << 0); // DYN_OUT, ENH_PKT SYNCDELAY; CPUCS = (2 << 3) | (1 << 1); // 48MHz CPU clock, CLKOUT enable SYNCDELAY; IFCONFIG = (1 << 7) | (1 << 6) | (1 << 3) | (3 << 0); // internal 48MHz FIFO clock, asynchronous I/O, slave FIFO SYNCDELAY; EP2CFG = 0; // EP2: off SYNCDELAY; EP4CFG = 0; // EP4: off SYNCDELAY; EP6CFG = (1 << 7) | (1 << 6) | (1 << 4) | (2 << 0); // EP6: valid, in, isochronous, 512B, double buf SYNCDELAY; EP8CFG = 0; // EP8: off SYNCDELAY; RESETFIFOS(); EP2FIFOCFG = 0; // EP2: off SYNCDELAY; EP4FIFOCFG = 0; // EP4: off SYNCDELAY; EP6FIFOCFG = (1 << 0); // EP6: 16bit //EP6FIFOCFG = (1 << 3) | (1 << 0); // EP6: AUTOIN, 16bit SYNCDELAY; EP8FIFOCFG = 0; // EP8: off SYNCDELAY; PORTACFG = 0; SYNCDELAY; FIFOPINPOLAR = 0; // all FIFO control pins low-active SYNCDELAY; USE_USB_INTS(); ENABLE_SUDAV(); ENABLE_USBRESET(); ENABLE_HISPEED(); EA = 1; RENUMERATE_UNCOND(); while(TRUE) { for(i=0;i<512;i++){ EP6FIFOBUF[i] = 0xee; } EP6BCH = 0x02; SYNCDELAY; EP6BCL = 0x00; SYNCDELAY; }
Whenever I try to read data from the endpoint, the FX2 always reports that there is no data available. How to fix this problem?
Thank you for your support!
Kind regards,
Peter
