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130 MIDI Tool Box
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130 MIDI Tool Box.iso
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mpu401
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mpuid.c
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C/C++ Source or Header
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1986-11-02
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1KB
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52 lines
/* Copyright (C) 1986 by M. J. Shannon, Jr.
** Permission to distribute for non-commercial uses granted as long as this
** notice is retained. Violators will be prosecuted.
*/
#include "mpu.h"
/* mpu_id():
** obtains the version & revision numbers of the MPU firmware and formats
** it into a string suitable for printing. The address of the (static)
** string is returned.
*/
char *
mpu_id()
{
static char vers_string[9];
register int v, r;
register char *p = &vers_string[0];
v = mpu_get(GET_VERSION);
r = (v >> 4) & 0x0F;
if (r > 9)
*p++ = '1', r -= 10;
*p++ = r + '0';
*p++ = '.';
v &= 0x0F;
if (v > 9)
*p++ = '1', v -= 10;
*p++ = v + '0';
r = mpu_get(GET_REVISION);
if (r)
{
if (r > 0)
{
if (r > 26)
{
*p++ = 'r';
v = r / 100;
if (v) *p++ = v + '0', r -= v * 100;
v = r / 10;
if (v) *p++ = v + '0', r -= v * 10;
if (r) *p++ = r + '0';
}
else
*p++ = r + '@';
}
}
*p = '\0';
return (vers_string);
}