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[/] [aemb/] [trunk/] [sw/] [cc/] [memtest.hh] - Diff between revs 178 and 179

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Rev 178	Rev 179
Line 1...	Line 1...
`/* $Id: memtest.hh,v 1.5 2008-06-23 22:28:00 sybreon Exp $`	`/* $Id: memtest.hh,v 1.6 2008-06-23 23:40:28 sybreon Exp $`
`**`	`**`
`** MEMORY TEST FUNCTIONS`	`** MEMORY TEST FUNCTIONS`
`** Copyright (C) 2008 Shawn Tan`	`** Copyright (C) 2008 Shawn Tan`
`**`	`**`
`** This file is part of AEMB.`	`** This file is part of AEMB.`
Line 30...	Line 30...
`WALKING ONES TEST`	`WALKING ONES TEST`
`Checks individual bit lines in O(1)`	`Checks individual bit lines in O(1)`
`http://www.embedded.com/2000/0007/0007feat1list1.htm`	`http://www.embedded.com/2000/0007/0007feat1list1.htm`
`*/`	`*/`

`inline int memTestDataBus(volatile int *ram)`	`static inline int memTestDataBus(volatile int *ram)`
`{`	`{`
`for (int i=1; i!=0; i<<=1)`	`for (int i=1; i!=0; i<<=1)`
`{`	`{`
`*ram = i; // write test value`	`*ram = i; // write test value`
`if (*ram != i) // read back test`	`if (*ram != i) // read back test`
Line 47...	Line 47...
`POWERS OF TWO TEST`	`POWERS OF TWO TEST`
`Checks the address lines`	`Checks the address lines`
`http://www.embedded.com/2000/0007/0007feat1list2.htm`	`http://www.embedded.com/2000/0007/0007feat1list2.htm`
`*/`	`*/`

`inline int memTestAddrBus(volatile int *ram, int len)`	`static inline int memTestAddrBus(volatile int *ram, int len)`
`{`	`{`
`const int p = 0xAAAAAAAA;`	`const int p = 0xAAAAAAAA;`
`const int q = 0x55555555;`	`const int q = 0x55555555;`
`int nlen = (len >> 2) - 1;`	`int nlen = (len / sizeof(int)) - 1;`

`// prefill memory`	`// prefill memory`
`for (int i=1; (i & nlen)!=0 ; i<<=1)`	`for (int i=1; (i & nlen)!=0 ; i<<=1)`
`{`	`{`
`ram[i] = p;`	`ram[i] = p;`
Line 64...	Line 64...
`// check 1 - stuck high`	`// check 1 - stuck high`
`ram[0] = q;`	`ram[0] = q;`
`for (int i=1; (i & nlen)!=0 ; i<<=1)`	`for (int i=1; (i & nlen)!=0 ; i<<=1)`
`{`	`{`
`if (ram[i] != p)`	`if (ram[i] != p)`
`return ram[i];`	`return i;`
`}`	`}`
`ram[0] = p;`

`// check 2 - stuck low`	`// check 2 - stuck low`
	`ram[0] = p;`
`for (int j=1; (j & nlen)!=0 ; j<<=1)`	`for (int j=1; (j & nlen)!=0 ; j<<=1)`
`{`	`{`
`ram[j] = q;`	`ram[j] = q;`
`for (int i=1; (i & nlen)!=0 ; i<<=1)`	`for (int i=1; (i & nlen)!=0 ; i<<=1)`
`{`	`{`
`if ((ram[i] != p) && (i != j))`	`if ((ram[i] != p) && (i != j))`
`return ram[i];`	`return i;`
`}`	`}`
`ram[j] = p;`	`ram[j] = p;`
`}`	`}`

`return 0;`	`return 0;`
Line 89...	Line 89...
`INCREMENT TEST`	`INCREMENT TEST`
`Checks the entire memory device`	`Checks the entire memory device`
`http://www.embedded.com/2000/0007/0007feat1list1.htm`	`http://www.embedded.com/2000/0007/0007feat1list1.htm`
`*/`	`*/`

`inline int memTestFullDev(volatile int *ram, int len)`	`static inline int memTestFullDev(volatile int *ram, int len)`
`{`	`{`
`int nlen = len >> 2;`	`int nlen = len / sizeof(int);`

`// prefill the memory`	`// prefill the memory`
`for (int p=1, i=0; i`	`for (int p=1, i=0; i`
`{`	`{`
`ram[i] = p;`	`ram[i] = p;`
Line 103...	Line 103...

`// pass 1 - check and invert`	`// pass 1 - check and invert`
`for (int p=1, i=0; i`	`for (int p=1, i=0; i`
`{`	`{`
`if (ram[i] != p)`	`if (ram[i] != p)`
`return ram[i];`	`return p;`
`ram[i] = ~p;`	`ram[i] = ~p;`
`}`	`}`

`// pass 2 - check and zero`	`// pass 2 - check and zero`
`for (int p=1, i=0; i`	`for (int p=1, i=0; i`
`{`	`{`
`if (ram[i] != ~p)`	`if (ram[i] != ~p)`
`return ram[i];`	`return p;`
`ram[i] = 0;`	`ram[i] = 0;`
`}`	`}`

`return 0;`	`return 0;`
`}`	`}`
Line 126...	Line 126...

`#endif`	`#endif`

`/*`	`/*`
$Log: not supported by cvs2svn $	$Log: not supported by cvs2svn $
	`Revision 1.5 2008/06/23 22:28:00 sybreon`
	`resized fulldev test`

`Revision 1.4 2008/06/23 22:08:39 sybreon`	`Revision 1.4 2008/06/23 22:08:39 sybreon`
`Renamed functions`	`Renamed functions`

`Revision 1.3 2008/06/23 22:05:14 sybreon`	`Revision 1.3 2008/06/23 22:05:14 sybreon`
`* empty log message *`	`* empty log message *`

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[/] [aemb/] [trunk/] [sw/] [cc/] [memtest.hh] - Diff between revs 178 and 179