;********************************************************************************
;* (C) 2007 Embedded Studio, All rights reserved.
;*
;* Description: TI TMS320C28xx RAM self test routine
;*
;********************************************************************************
;********************************************************************************
;* All RAM sector start address and size definition
;********************************************************************************
.global _RamSectors
.sect ".const"
.align 2
_RamSectors:
.field 0x40, 32 ;RAM M0
.field 0x3C0, 16 ;M0 length excluding vector
.space 16
.field 0x400, 32 ;RAM M1
.field 1024, 16 ;M1 length
.space 16
.field 0xD00, 32 ;PIE vector RAM
.field 256, 16 ;PIE Vector RAM length
.space 16
.field 0x8000, 32 ;RAM L0
.field 4096, 16 ;L0 length
.space 16
.field 0x9000, 32 ;RAM L1
.field 4096, 16 ;L1 length
.space 16
.field 0x3F8000, 32 ;RAM H0
.field 8192, 16 ;H0 length
.space 16
;**********************************************************************************
;* Function: _RamIntegrityTest
;*
;* Description:
;* This function tests all sectors of on-chip RAM set in RamSectors
;*
;* Return:
;* TRUE if all RAM locations were verified correctly;
;* FALSE if any of the RAM location was tested to be incorrect.
;*
;**********************************************************************************
.def _RamIntegrityTest
.sect ".text"
.global _RamIntegrityTest
_RamIntegrityTest:
EALLOW ;this instruction is needed only
;because PIE Vector RAM is EALLOW protected
ADDB SP, #2
MOV *-SP[2], #6
MOV *-SP[1], #0
MOV AL, *-SP[2]
CMP AL, *-SP[1]
B L3, LEQ
L1:
SETC SXM
MOVL XAR4, #_RamSectors
MOV ACC, *-SP[1] << 2
ADDL XAR4, ACC
MOVL XAR5, #_RamSectors+2
MOV ACC, *-SP[1] << 2
ADDL XAR5, ACC
MOVL XAR4, *+XAR4[0]
MOV AL, *+XAR5[0]
LCR #_RamSectorTest
CMPB AL, #0
BF L2, NEQ
MOVB AL, #0
B L4, UNC
L2:
INC *-SP[1]
MOV AL, *-SP[2]
CMP AL, *-SP[1]
B L1, GT
L3:
MOVB AL, #1
L4:
SUBB SP, #2
EDIS
LRETR
;**********************************************************************************
;* Function: _RamSectorTest
;*
;* Description:
;* This function tests one sector of on-chip RAM set in RamSectors
;*
;* Params:
;* RAM sector start address and length
;*
;* Return:
;* Boolean, TRUE if all RAM locations were verified correctly;
;* FALSE if any of the RAM location was tested to be incorrect.
;*
;*********************************************************************************
.sect ".text"
.global _RamSectorTest
_RamSectorTest:
ADDB SP, #4
MOV *-SP[3], AL
MOVL *-SP[2], XAR4
MOV *-SP[4], #0
MOV AL, *-SP[3]
CMP AL, *-SP[4]
B L8, LOS
L5:
MOVL XAR6, *-SP[2]
SETC SXM
MOV ACC, *-SP[4]
ADDL ACC, XAR6
MOVL XAR4, ACC
MOV *+XAR4[0], #0x5555 ;writes first pattern
MOVL XAR6, *-SP[2]
MOV ACC, *-SP[4]
ADDL ACC, XAR6
MOVL XAR4, ACC
CMP *+XAR4[0], #0x5555 ;reads back and compares
BF L6,EQ
MOVB AL,#0
B L9,UNC
L6:
MOVL XAR6, *-SP[2]
MOV ACC, *-SP[4]
ADDL ACC, XAR6
MOVL XAR4, ACC
MOV *+XAR4[0], #0xAAAA ;writes second pattern
MOVL XAR6, *-SP[2]
MOV ACC, *-SP[4]
ADDL ACC, XAR6
MOVL XAR4, ACC
CMP *+XAR4[0], #0xAAAA ;reads back and compares
BF L7, EQ
MOVB AL, #0
B L9, UNC
L7:
INC *-SP[4]
MOV AL, *-SP[3]
CMP AL, *-SP[4]
B L5, HI
L8:
MOVB AL, #1
L9:
SUBB SP, #4
LRETR
; End of file |