diff options
Diffstat (limited to 'firmware/fx2/b100/usrp_common.c')
| -rw-r--r-- | firmware/fx2/b100/usrp_common.c | 57 |
1 files changed, 33 insertions, 24 deletions
diff --git a/firmware/fx2/b100/usrp_common.c b/firmware/fx2/b100/usrp_common.c index 4b6dde881..a21353688 100644 --- a/firmware/fx2/b100/usrp_common.c +++ b/firmware/fx2/b100/usrp_common.c @@ -32,13 +32,11 @@ init_usrp (void) CPUCS = bmCLKSPD1; // CPU runs @ 48 MHz CKCON = 0; // MOVX takes 2 cycles - // IFCLK is generated internally and runs at 48 MHz; GPIF "master mode" - - IFCONFIG = bmIFCLKSRC | bm3048MHZ | bmIFCLKOE | bmIFCLKPOL | bmIFGPIF; + // IFCLK is generated internally and runs at 48 MHz, external clk en + IFCONFIG = bmIFCLKSRC | bm3048MHZ | bmIFCLKOE; SYNCDELAY; - // configure IO ports (B and D are used by GPIF) - + // configure IO ports (B and D are used by slave FIFO) IOA = bmPORT_A_INITIAL; // Port A initial state OEA = bmPORT_A_OUTPUTS; // Port A direction register @@ -53,7 +51,6 @@ init_usrp (void) // SYNCDELAY; // configure end points - EP1OUTCFG = bmVALID | bmBULK; SYNCDELAY; EP1INCFG = bmVALID | bmBULK | bmIN; SYNCDELAY; @@ -63,7 +60,6 @@ init_usrp (void) EP8CFG = bmVALID | bmBULK | bmDOUBLEBUF | bmIN; SYNCDELAY; // 512 dbl bulk IN // reset FIFOs - FIFORESET = bmNAKALL; SYNCDELAY; FIFORESET = 2; SYNCDELAY; FIFORESET = 4; SYNCDELAY; @@ -72,37 +68,50 @@ init_usrp (void) FIFORESET = 0; SYNCDELAY; // configure end point FIFOs - - // let core see 0 to 1 transistion of autoout bit - + // let core see 0 to 1 transistion of autoin/out bit EP2FIFOCFG = bmWORDWIDE; SYNCDELAY; EP2FIFOCFG = bmAUTOOUT | bmWORDWIDE; SYNCDELAY; - EP6FIFOCFG = bmZEROLENIN | bmWORDWIDE; SYNCDELAY; - //EP6FIFOCFG = bmWORDWIDE; SYNCDELAY; + EP6FIFOCFG = bmZEROLENIN | bmWORDWIDE; SYNCDELAY; + EP6FIFOCFG = bmZEROLENIN | bmAUTOIN | bmWORDWIDE; SYNCDELAY; EP4FIFOCFG = bmWORDWIDE; SYNCDELAY; EP4FIFOCFG = bmAUTOOUT | bmWORDWIDE; SYNCDELAY; - EP8FIFOCFG = bmAUTOIN | bmWORDWIDE; SYNCDELAY; + EP8FIFOCFG = bmZEROLENIN | bmWORDWIDE; SYNCDELAY; + EP8FIFOCFG = bmZEROLENIN | bmAUTOIN | bmWORDWIDE; SYNCDELAY; EP0BCH = 0; SYNCDELAY; - // arm EP1OUT so we can receive "out" packets (TRM pg 8-8) - EP1OUTBC = 0; SYNCDELAY; - EP2GPIFFLGSEL = 0x00; SYNCDELAY; // For EP2OUT, GPIF uses EF flag - EP6GPIFFLGSEL = 0x00; SYNCDELAY; // For EP6IN, GPIF uses FF flag - EP4GPIFFLGSEL = 0x00; SYNCDELAY; - EP8GPIFFLGSEL = 0x00; SYNCDELAY; - - // set autoin length for EP6 - // FIXME should be f(enumeration) - + // set autoin length for EP6/EP8 EP6AUTOINLENH = (512) >> 8; SYNCDELAY; // this is the length for high speed EP6AUTOINLENL = (512) & 0xff; SYNCDELAY; - EP8AUTOINLENH = (32) >> 8; SYNCDELAY; EP8AUTOINLENL = (32) & 0xff; SYNCDELAY; + //set FLAGA, FLAGB, FLAGC, FLAGD to be EP2EF, EP4EF, EP6PF, EP8PF + PINFLAGSAB = (bmEP2EF) | (bmEP4EF << 4); + PINFLAGSCD = (bmEP6PF) | (bmEP8PF << 4); + + //ok as far as i can tell, DECIS is reversed compared to the FX2 TRM. + //p15.34 says DECIS high implements [assert when (fill > level)], observed opposite + EP6FIFOPFH = 0x09; + SYNCDELAY; + EP6FIFOPFL = 0xFD; + SYNCDELAY; + +// EP2FIFOPFH = 0x08; +// SYNCDELAY; +// EP2FIFOPFL = 0x00; +// SYNCDELAY; + + //assert FIFOEMPTY one cycle sooner so we get it in time at the FPGA + EP2FIFOCFG |= bmBIT5; + + //set FIFOPINPOLAR to normal (active low) mode + FIFOPINPOLAR = 0x00; + SYNCDELAY; + PORTACFG = 0x80; + init_board (); } |