void timer2_isr(void) __interrupt TF2_ISR
{
- PA7 = !PA7;
+ /* Toggle the 1kHz calibration pin, only accurate up to ca 8MHz. */
+ PC2 = !PC2;
+
if (ledcounter) {
if (--ledcounter == 0) {
/* Clear LED. */
/*
* This sets three bits for each channel, one channel at a time.
- * For channel 0 we want to set bits 5, 6 & 7
- * For channel 1 we want to set bits 2, 3 & 4
+ * For channel 0 we want to set bits 1, 2 & 3
+ * For channel 1 we want to set bits 4, 5 & 6
*
* We convert the input values that are strange due to original
* firmware code into the value of the three bits as follows:
switch (val) {
case 1:
- bits = 0x24 * 2;
+ bits = 0x02;
break;
case 2:
- bits = 0x24 * 1;
+ bits = 0x01;
break;
case 5:
- bits = 0x24 * 0;
+ bits = 0x00;
break;
case 10:
- bits = 0x24 * 3;
+ bits = 0x03;
break;
default:
return FALSE;
}
- mask = (channel) ? 0xe0 : 0x1c;
- IOC = (IOC & ~mask) | (bits & mask);
+ bits = bits << (channel ? 1 : 4);
+ mask = (channel) ? 0x70 : 0x0e;
+ IOA = (IOA & ~mask) | (bits & mask);
return TRUE;
}
{
int i;
+ /* Set analog mode. */
+ PA7 = 1;
+
clear_fifo();
for (i = 0; i < 1000; i++);
} samplerates[] = {
{ 48, 0x80, 0, 3, 0, 0x00, 0xea },
{ 30, 0x80, 0, 3, 0, 0x00, 0xaa },
- { 24, 1, 0, 2, 1, 0x40, 0xca },
- { 16, 1, 1, 2, 0, 0x40, 0xca },
- { 12, 2, 1, 2, 0, 0x40, 0xca },
- { 8, 3, 2, 2, 0, 0x40, 0xca },
- { 4, 6, 5, 2, 0, 0x40, 0xca },
- { 2, 12, 11, 2, 0, 0x40, 0xca },
- { 1, 24, 23, 2, 0, 0x40, 0xca },
- { 50, 48, 47, 2, 0, 0x40, 0xca },
- { 20, 120, 119, 2, 0, 0x40, 0xca },
- { 10, 240, 239, 2, 0, 0x40, 0xca },
+ { 24, 1, 0, 2, 1, 0x10, 0xca },
+ { 16, 1, 1, 2, 0, 0x10, 0xca },
+ { 12, 2, 1, 2, 0, 0x10, 0xca },
+ { 8, 3, 2, 2, 0, 0x10, 0xca },
+ { 4, 6, 5, 2, 0, 0x10, 0xca },
+ { 2, 12, 11, 2, 0, 0x10, 0xca },
+ { 1, 24, 23, 2, 0, 0x10, 0xca },
+ { 50, 48, 47, 2, 0, 0x10, 0xca },
+ { 20, 120, 119, 2, 0, 0x10, 0xca },
+ { 10, 240, 239, 2, 0, 0x10, 0xca },
};
static BOOL set_samplerate(BYTE rate)
/* OUTPUT 0-7 */
EXTAUTODAT2 = samplerates[i].out0;
- EXTAUTODAT2 = 0x44; /* OE0=1, CTL0=1 */
- EXTAUTODAT2 = 0x44; /* OE0=1, CTL0=1 */
+ EXTAUTODAT2 = 0x11; /* OE0=1, CTL0=1 */
+ EXTAUTODAT2 = 0x11; /* OE0=1, CTL0=1 */
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
EXTAUTODAT2 = 0;
EP4CFG = 0;
EP8CFG = 0;
+ /* Set analog mode. */
+ PA7 = 1;
+
/* In idle mode tristate all outputs. */
GPIFIDLECTL = 0x00; /* Don't enable CTL0-5 outputs. */
GPIFCTLCFG = 0x80; /* TRICTL=1. CTL0-2: CMOS outputs, tri-statable. */
PORTCCFG = 0;
PORTACFG = 0;
OEC = 0xff;
- OEA = 0x80;
+ OEA = 0xff;
while (TRUE) {
if (dosud) {