return TRUE;
}
+
+/**
+ * Each LSB in the nibble of the byte controls the coupling per channel.
+ *
+ * Setting PE3 disables AC coupling capacitor on CH0.
+ * Setting PE0 disables AC coupling capacitor on CH1.
+ */
+static void set_coupling(BYTE coupling_cfg)
+{
+ if (coupling_cfg & 0x01)
+ IOE |= 0x08;
+ else
+ IOE &= ~0x08;
+
+ if (coupling_cfg & 0x10)
+ IOE |= 0x01;
+ else
+ IOE &= ~0x01;
+}
+
static BOOL set_numchannels(BYTE numchannels)
{
if (numchannels == 1 || numchannels == 2) {
{ 30, 0x80, 0, 3, 0, 0x00, 0xaa },
{ 24, 1, 0, 2, 1, 0x40, 0xea },
{ 16, 1, 1, 2, 0, 0x40, 0xea },
+ { 15, 1, 0, 2, 1, 0x40, 0xaa },
{ 12, 2, 1, 2, 0, 0x40, 0xea },
+ { 11, 1, 1, 2, 0, 0x40, 0xaa },
{ 8, 3, 2, 2, 0, 0x40, 0xea },
+ { 6, 2, 2, 2, 0, 0x40, 0xaa },
+ { 5, 3, 2, 2, 0, 0x40, 0xaa },
{ 4, 6, 5, 2, 0, 0x40, 0xea },
+ { 3, 5, 4, 2, 0, 0x40, 0xaa },
{ 2, 12, 11, 2, 0, 0x40, 0xea },
{ 1, 24, 23, 2, 0, 0x40, 0xea },
{ 50, 48, 47, 2, 0, 0x40, 0xea },
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;
return TRUE;
}
+static BOOL set_calibration_pulse(BYTE fs)
+{
+ switch (fs) {
+ case 0: // 100Hz
+ RCAP2L = -10000 & 0xff;
+ RCAP2H = (-10000 & 0xff00) >> 8;
+ return TRUE;
+ case 1: // 1kHz
+ RCAP2L = -1000 & 0xff;
+ RCAP2H = (-1000 & 0xff00) >> 8;
+ return TRUE;
+ case 10: // 1kHz
+ RCAP2L = (BYTE)(-100 & 0xff);
+ RCAP2H = 0xff;
+ return TRUE;
+ case 50: // 50kHz
+ RCAP2L = (BYTE)(-20 & 0xff);
+ RCAP2H = 0xff;
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
/* Set *alt_ifc to the current alt interface for ifc. */
BOOL handle_get_interface(BYTE ifc, BYTE *alt_ifc)
{
stop_sampling();
/* Clear EP0BCH/L for each valid command. */
- if (cmd >= 0xe0 && cmd <= 0xe4) {
+ if (cmd >= 0xe0 && cmd <= 0xe6) {
EP0BCH = 0;
EP0BCL = 0;
while (EP0CS & bmEPBUSY);
case 0xe4:
set_numchannels(EP0BUF[0]);
return TRUE;
+ case 0xe5:
+ set_coupling(EP0BUF[0]);
+ return TRUE;
+ case 0xe6:
+ set_calibration_pulse(EP0BUF[0]);
+ return TRUE;
}
return FALSE; /* Not handled by handlers. */
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 = -1000 & 0xff;
- RCAP2H = (-1000 >> 8) & 0xff;
+ RCAP2H = (-1000 & 0xff00) >> 8;
T2CON = 0;
ET2 = 1;
TR2 = 1;