1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
|
//==========================================================================
//
// clockcnv.cxx
//
// Clock Converter test
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): hmt
// Contributors: hmt
// Date: 2000-01-24
// Description: Tests the Kernel Real Time Clock Converter subsystem
//
//####DESCRIPTIONEND####
#include <pkgconf/kernel.h>
#include <cyg/kernel/clock.hxx>
#include <cyg/kernel/thread.hxx>
#include <cyg/infra/testcase.h>
#include <cyg/kernel/clock.inl>
#include <cyg/kernel/thread.inl>
#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
#include <cyg/infra/diag.h>
static void null_printf(const char *, ...)
{ /* nothing */ }
#define PRINTF0 diag_printf
#define nPRINTF0 null_printf
#define nPRINTF1 diag_printf
#define PRINTF1 null_printf
#define nPRINTF2 diag_printf
#define PRINTF2 null_printf
#define NTHREADS 1
#include "testaux.hxx"
static struct { cyg_uint32 ns; double scale; } ns_tickers[] = {
{ 70000000, 7.0 }, // 7cS
{ 50000000, 5.0 }, // 5cS
{ 45000000, 4.5 }, // 4.5cS
{ 30000000, 3.0 }, // 3cS
{ 20000000, 2.0 }, // 2cS
{ 10000000, 1.0 }, // 1cS - no change
{ 5000000, 0.5 }, // 1/2 a cS
{ 4900000, 0.49 }, // a bit below
{ 3333333, 0.3333333 }, // 1/3 cS
{ 1250000, 0.125 }, // 800Hz
{ 1000000, 0.1 }, // 1000Hz
{ 909090, 0.0909090 }, // 1100Hz
{ 490000, 0.049 }, // 490uS
{ 333333, 0.0333333 }, // 1/30 cS, 1/3mS
{ 49000, 0.0049 }, // 49uS
{ 33333, 0.0033333 }, // 1/30 mS
{ 4900, 0.00049 }, // 4.9uS
// now some outlandish ones
{ 170, 0.000017 }, // 170nS
{ 11, 0.0000011 }, // 11nS
{ 1000000000u, 100.0 }, // one second
{ 1234567777u, 123.4567777 }, // 1.234... seconds
{ 4294967291u, 429.4967291 }, // 4.3 seconds, nearly maxint.
// now some which are prime in the nS per tick field
{ 909091, 0.0909091 }, // also 1100Hz - but 909091 is a prime!
// and some eye-pleasing primes from the www - if they're not actually
// prime, don't blame me. http://www.rsok.com/~jrm/printprimes.html
{ 1000003, 0.1000003 },
{ 1477771, 0.1477771 },
{ 2000003, 0.2000003 },
{ 2382001, 0.2382001 },
{ 3333133, 0.3333133 },
{ 3999971, 0.3999971 },
{ 5555591, 0.5555591 },
{ 6013919, 0.6013919 },
// That's enough
};
static void entry0( CYG_ADDRWORD data )
{
// First just try it with the clock as default:
Cyg_Clock *rtc = Cyg_Clock::real_time_clock;
Cyg_Clock::converter cv, rcv;
Cyg_Clock::cyg_resolution res;
unsigned int counter = 0;
unsigned int skipped = 0;
unsigned int i;
for ( i = 0; i < sizeof( ns_tickers )/sizeof( ns_tickers[0] ); i++ ) {
unsigned int lcounter = 0;
unsigned int lskipped = 0;
rtc->get_other_to_clock_converter( ns_tickers[i].ns, &cv );
rtc->get_clock_to_other_converter( ns_tickers[i].ns, &rcv );
PRINTF1( "ns per tick: %d\n", ns_tickers[i].ns );
PRINTF1( " converter: * %d / %d * %d / %d\n",
(int)cv.mul1, (int)cv.div1, (int)cv.mul2,(int) cv.div2 );
PRINTF1( " reverser: * %d / %d * %d / %d\n",
(int)rcv.mul1, (int)rcv.div1, (int)rcv.mul2, (int)rcv.div2 );
double d = 1.0;
d *= (double)cv.mul1;
d /= (double)cv.div1;
d *= (double)cv.mul2;
d /= (double)cv.div2;
d *= (double)rcv.mul1;
d /= (double)rcv.div1;
d *= (double)rcv.mul2;
d /= (double)rcv.div2;
PRINTF1( " composite product %d.%d\n",
(int)d, ((int)(d * 1000000) % 1000000 ) );
d -= 1.0;
CYG_TEST_CHECK( d < +0.0001, "Overflow in composite product" );
CYG_TEST_CHECK( d > -0.0001, "Underflow in composite product" );
res = rtc->get_resolution();
double factor_other_to_clock;
double factor_clock_to_other;
// res.dividend/res.divisor is the number of nS in a system
// clock tick. So:
d = (double)res.dividend/(double)res.divisor;
factor_other_to_clock = ns_tickers[i].scale * 1.0e7 / d ;
factor_clock_to_other = d / (ns_tickers[i].scale * 1.0e7);
unsigned int j;
for ( j = 1; j < 100; j++ ) {
cyg_uint64 delay;
if (cyg_test_is_simulator)
j += 30; // test fewer values
/* tr.b..m..k.. */
#ifdef CYGPKG_HAL_V85X_V850_CEB
j += 30; // test fewer values
#endif
for ( delay = j; delay < 1000000000000ll; delay *= 10 ) {
// get the converted result
cyg_uint64 result = Cyg_Clock::convert( delay, &cv );
counter++; lcounter++;
if ( (double)delay * (double)cv.mul1 > 1.6e+19 ||
(double)delay * (double)rcv.mul1 > 1.6e+19 ) {
// in silly territory now, give up.
// (that's MAXINT squared, approx.)
skipped++; lskipped++;
continue; // so the counter is accurate
}
PRINTF2( "delay %x%08x to result %x%08x\n",
(int)(delay >> 32), (int)delay,
(int)(result >> 32), (int)result );
// get what it should be in double maths
double delta = factor_other_to_clock * (double)delay;
if ( delta > 1000.0 ) {
delta = (double)result - delta;
delta /= (double)result;
CYG_TEST_CHECK( delta <= +0.01,
"Proportional overflow in conversion to" );
CYG_TEST_CHECK( delta >= -0.01,
"Proportional underflow in conversion to" );
}
else {
cyg_uint64 lo = (cyg_uint64)(delta); // assume TRUNCATION
cyg_uint64 hi = lo + 1;
CYG_TEST_CHECK( hi >= result,
"Range overflow in conversion to" );
CYG_TEST_CHECK( lo <= result,
"Range underflow in conversion to" );
}
// get the converted result
result = Cyg_Clock::convert( delay, &rcv );
PRINTF2( "delay %x%08x from result %x%08x\n",
(int)(delay >> 32), (int)delay,
(int)(result >> 32), (int)result );
// get what it should be in double maths
delta = factor_clock_to_other * (double)delay;
if ( delta > 1000.0 ) {
delta = (double)result - delta;
delta /= (double)result;
CYG_TEST_CHECK( delta <= +0.01,
"Proportional overflow in conversion from" );
CYG_TEST_CHECK( delta >= -0.01,
"Proportional underflow in conversion from" );
}
else {
cyg_uint64 lo = (cyg_uint64)(delta); // assume TRUNCATION
cyg_uint64 hi = lo + 1;
CYG_TEST_CHECK( hi >= result,
"Range overflow in conversion from" );
CYG_TEST_CHECK( lo <= result,
"Range underflow in conversion from" );
}
if (cyg_test_is_simulator)
break;
}
}
PRINTF0( "INFO:<%d nS/tick: tested %d values, skipped %d because of overflow>\n",
ns_tickers[i].ns, lcounter, lskipped );
}
PRINTF0( "INFO:<tested %d values, total skipped %d because of overflow>\n",
counter, skipped );
CYG_TEST_PASS_FINISH("ClockCnv OK");
}
void clockcnv_main( void )
{
CYG_TEST_INIT();
new_thread(entry0, (CYG_ADDRWORD)&thread_obj[0]);
Cyg_Scheduler::start();
}
externC void
cyg_start( void )
{
#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
cyg_hal_invoke_constructors();
#endif
clockcnv_main();
}
#else // def CYGVAR_KERNEL_COUNTERS_CLOCK
externC void
cyg_start( void )
{
CYG_TEST_INIT();
CYG_TEST_NA( "Kernel real-time clock disabled");
}
#endif // def CYGVAR_KERNEL_COUNTERS_CLOCK
// EOF clockcnv.cxx
|
