IFCONFIG = samplerates[i].ifcfg;
AUTOPTRSETUP = 7;
- AUTOPTRH2 = 0xE4;
+ AUTOPTRH2 = 0xE4; /* 0xE400: GPIF waveform descriptor 0. */
AUTOPTRL2 = 0x00;
/*
* jump 0, CTL2=Z, FIFO, LOOP
*/
+ /* LENGTH / BRANCH 0-7 */
EXTAUTODAT2 = samplerates[i].wait0;
EXTAUTODAT2 = samplerates[i].wait1;
EXTAUTODAT2 = 1;
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
+ /* OPCODE 0-7 */
EXTAUTODAT2 = samplerates[i].opc0;
EXTAUTODAT2 = samplerates[i].opc1;
- EXTAUTODAT2 = 1;
+ EXTAUTODAT2 = 1; /* DATA=0 DP=1 */
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
+ /* OUTPUT 0-7 */
EXTAUTODAT2 = samplerates[i].out0;
- EXTAUTODAT2 = 0x44;
- EXTAUTODAT2 = 0x44;
- EXTAUTODAT2 = 0x00;
- EXTAUTODAT2 = 0x00;
- EXTAUTODAT2 = 0x00;
- EXTAUTODAT2 = 0x00;
- EXTAUTODAT2 = 0x00;
+ EXTAUTODAT2 = 0x44; /* OE0=1, CTL0=1 */
+ EXTAUTODAT2 = 0x44; /* OE0=1, CTL0=1 */
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ EXTAUTODAT2 = 0;
+ /* LOGIC FUNCTION 0-7 */
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
PC1 = 1;
ledcounter = 1000;
- switch (cmd) {
- case 0xe0:
- case 0xe1:
+ /* Clear EP0BCH/L for each valid command. */
+ if (cmd >= 0xe0 && cmd <= 0xe4) {
EP0BCH = 0;
EP0BCL = 0;
while (EP0CS & bmEPBUSY);
+ }
+
+ switch (cmd) {
+ case 0xe0:
+ case 0xe1:
set_voltage(cmd - 0xe0, EP0BUF[0]);
return TRUE;
case 0xe2:
- EP0BCH = 0;
- EP0BCL = 0;
- while (EP0CS & bmEPBUSY);
set_samplerate(EP0BUF[0]);
return TRUE;
case 0xe3:
- EP0BCH = 0;
- EP0BCL = 0;
- while (EP0CS & bmEPBUSY);
if (EP0BUF[0] == 1)
start_sampling();
return TRUE;
case 0xe4:
- EP0BCH = 0;
- EP0BCL = 0;
- while (EP0CS & bmEPBUSY);
set_numchannels(EP0BUF[0]);
return TRUE;
}
EP8CFG = 0;
/* In idle mode tristate all outputs. */
- GPIFIDLECTL = 0x00;
- GPIFCTLCFG = 0x80;
+ GPIFIDLECTL = 0x00; /* Don't enable CTL0-5 outputs. */
+ GPIFCTLCFG = 0x80; /* TRICTL=1. CTL0-2: CMOS outputs, tri-statable. */
GPIFWFSELECT = 0x00;
GPIFREADYSTAT = 0x00;
/* Init timer2. */
RCAP2L = -500 & 0xff;
- RCAP2H = (-500 >> 8) & 0xff;
+ RCAP2H = (-500 & 0xff00) >> 8;
T2CON = 0;
ET2 = 1;
TR2 = 1;