tom dunigan
performance test of FastCRC lib, compare hardware CRC with Arduino software CRC (crc16.h) and table driven implementation
performance test of FastCRC lib, ref https://github.com/FrankBoesing/FastCRC
Teensy 3.2 @120MHz mbed K64F @120MHz
hardware CRC hardware CRC
Maxim (iButton) FastCRC: Value:0xF6, Time: 275 us. Maxim (iButton) FastCRC: Value:0xf6, Time: 275 us
Maxim (iButton) builtin: Value:0xF6, Time: 9994 us. Maxim (iButton) builtin: Value:0xf6, Time: 7100 us
MODBUS FastCRC: Value:0x7029, Time: 275 us. MODBUS FastCRC: Value:0x7029, Time: 275 us
MODBUS builtin: Value:0x7029, Time: 9584 us. MODBUS builtin: Value:0x7029, Time: 7100 us
XMODEM FastCRC: Value:0x98D9, Time: 275 us. XMODEM FastCRC: Value:0x98d9, Time: 275 us
XMODEM builtin: Value:0x98D9, Time: 10542 us. XMODEM builtin: Value:0x98d9, Time: 8193 us
MCRF4XX FastCRC: Value:0x4A29, Time: 275 us. MCRF4XX FastCRC: Value:0x4a29, Time: 275 us
MCRF4XX builtin: Value:0x4A29, Time: 1783 us. MCRF4XX builtin: Value:0x4a29, Time: 1639 us
KERMIT FastCRC: Value:0xB259, Time: 279 us. KERMIT FastCRC: Value:0xb259, Time: 275 us
Ethernet FastCRC: Value:0x1271457F, Time: 275 us. Ethernet FastCRC: Value:0x1271457f, Time: 275 us
table-driven CRC table-driven CRC
Maxim (iButton) FastCRC: Value:0xF6, Time: 1329 us. Maxim (iButton) FastCRC: Value:0xf6, Time: 997 us
Maxim (iButton) builtin: Value:0xF6, Time: 9994 us. Maxim (iButton) builtin: Value:0xf6, Time: 7101 us
MODBUS FastCRC: Value:0x7029, Time: 2226 us. MODBUS FastCRC: Value:0x7029, Time: 1623 us
MODBUS builtin: Value:0x7029, Time: 9584 us. MODBUS builtin: Value:0x7029, Time: 7101 us
XMODEM FastCRC: Value:0x98D9, Time: 2102 us. XMODEM FastCRC: Value:0x98d9, Time: 1608 us
XMODEM builtin: Value:0x98D9, Time: 10542 us. XMODEM builtin: Value:0x98d9, Time: 8193 us
MCRF4XX FastCRC: Value:0x4A29, Time: 2185 us. MCRF4XX FastCRC: Value:0x4a29, Time: 1664 us
MCRF4XX builtin: Value:0x4A29, Time: 1782 us. MCRF4XX builtin: Value:0x4a29, Time: 1639 us
KERMIT FastCRC: Value:0xB259, Time: 2190 us. KERMIT FastCRC: Value:0xb259, Time: 1650 us
Ethernet FastCRC: Value:0x38D32145, Time: 2090 us. Ethernet FastCRC: Value:0x38d32145, Time: 1702 us
Revision 1:66996d5c4b7c, committed 2016-04-23
- Comitter:
- manitou
- Date:
- Sat Apr 23 14:22:56 2016 +0000
- Parent:
- 0:d4f8f8fee9db
- Commit message:
- add validation
Changed in this revision
| FastCRC.lib | Show annotated file Show diff for this revision Revisions of this file |
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
diff -r d4f8f8fee9db -r 66996d5c4b7c FastCRC.lib --- a/FastCRC.lib Fri Apr 22 09:55:23 2016 +0000 +++ b/FastCRC.lib Sat Apr 23 14:22:56 2016 +0000 @@ -1,1 +1,1 @@ -https://developer.mbed.org/users/manitou/code/FastCRC/#7343f324d853 +https://developer.mbed.org/users/manitou/code/FastCRC/#1ce0f4ee7357
diff -r d4f8f8fee9db -r 66996d5c4b7c main.cpp
--- a/main.cpp Fri Apr 22 09:55:23 2016 +0000
+++ b/main.cpp Sat Apr 23 14:22:56 2016 +0000
@@ -20,6 +20,54 @@
uint8_t buf[BUFSIZE] __attribute__((aligned(4)));
+// validation
+void printva(char * name, uint32_t check, uint32_t val){
+ printf("%s",name);
+ if (check == val)
+ printf(" is ok");
+ else
+ printf(" is NOT ok");
+ printf("\n");
+}
+
+void validate() {
+ uint32_t crc;
+ uint8_t buf[9] = {'1','2','3','4','5','6','7','8','9'};
+
+
+ printf("CRC Validation\n");
+
+ crc = CRC8.smbus(buf, sizeof(buf));
+ printva("SMBUS", 0xf4, crc);
+
+ crc = CRC8.maxim(buf, sizeof(buf));
+ printva("Maxim", 0xa1, crc);
+
+ crc = CRC16.ccitt(buf, sizeof(buf));
+ printva("CCITT", 0x29b1, crc);
+
+ crc = CRC16.mcrf4xx(buf, sizeof(buf));
+ printva("MCRF4XX", 0x6f91, crc);
+
+ crc = CRC16.modbus(buf, sizeof(buf));
+ printva("MODBUS", 0x4b37, crc);
+
+ crc = CRC16.kermit(buf, sizeof(buf));
+ printva("KERMIT", 0x2189, crc);
+
+ crc = CRC16.xmodem(buf, sizeof(buf));
+ printva("XMODEM", 0x31c3, crc);
+
+ crc = CRC16.x25(buf, sizeof(buf));
+ printva("X.25", 0x906e, crc);
+
+ crc = CRC32.crc32(buf, sizeof(buf));
+ printva("CRC32", 0xcbf43926, crc);
+
+ crc = CRC32.cksum(buf, sizeof(buf));
+ printva("CKSUM", 0x765e7680, crc);
+}
+
// Supporting functions for Software CRC
@@ -62,7 +110,8 @@
tmr.start();
printf("\nSystemCoreClock %d %s %s\n",SystemCoreClock,__TIME__,__DATE__);
- printf("CRC Benchmark %d bytes\n",sizeof(buf));
+ validate();
+ printf("\nCRC Benchmark %d bytes\n",sizeof(buf));
//Fill array with data
for (int i=0; i<BUFSIZE; i++) {