I used the slave fifo of fx2lp to send data by EP2,but the fifo is not work so well when set EP2AUTOINLENH to 0x04,but it worked well when set EP2AUTOINLENH to 0x02!!! In other words, EP2AUTOINLENH can not be set to larger than 0x02.I guess there was someting wrong with the init code,may the init sequence is not right.
Here is the init code:
void TD_Init(void) // Called once at startup
{
// set the CPU clock to 48MHz
CPUCS = 0x12;
SYNCDELAY;
// set the slave FIFO interface to 48MHz
IFCONFIG = 0x43;
SYNCDELAY;
// configure REVCTL
REVCTL = 0x03;
SYNCDELAY;
// configure varies EndPoints
EP2CFG = 0xE8; // enabled, quad buffered, 1024B, IN, bulk fifo
SYNCDELAY; // see TRM section 15.14
EP4CFG = (EP4CFG & 0x7F); // disabled...
SYNCDELAY; // see TRM section 15.14
EP6CFG = (EP6CFG & 0x7F); // disabled, quad buffered, 512B(?), OUT, bulk fifo
SYNCDELAY; // see TRM section 15.14
EP8CFG = (EP8CFG & 0x7F); // disabled...
SYNCDELAY;
// configure the EPxFIFOCFG
EP2FIFOCFG = 0x0C; // autoin, zero enable,8bit data bus
SYNCDELAY; // see TRM section 15.14
SYNCDELAY;
EP4FIFOCFG = 0x00;
SYNCDELAY;
SYNCDELAY;
EP6FIFOCFG = 0x00;
SYNCDELAY;
SYNCDELAY;
EP8FIFOCFG = 0x00;
SYNCDELAY;
SYNCDELAY;
FIFOPINPOLAR = 0x0;
SYNCDELAY;
EP2AUTOINLENH = 0x04; // 0x04 made the fifo unwork!But 0x02 is OK!
SYNCDELAY;
EP2AUTOINLENL = 0x00;
SYNCDELAY;
// enable dual autopointer(s)
AUTOPTRSETUP |= 0x01;
// reset all fifos
FIFORESET = 0x80; // reset all FIFOs
SYNCDELAY;
FIFORESET = 0x02;
SYNCDELAY;
FIFORESET = 0x04;
SYNCDELAY;
FIFORESET = 0x06;
SYNCDELAY;
FIFORESET = 0x08;
SYNCDELAY;
FIFORESET = 0x00;
SYNCDELAY;
}
Did anyone know the reason?I must set EP2AUTOINLENH to" 0x4" for special useage though "0x2" can make the fifo work.
