Part Number: DRA725
TI chip：dra725
TI sdk version：tisdk-rootfs-image-dra7xx-evm_vsdk_3_5
1、Switch machine test repeatedly, boot (14 v 1A 30 seconds) shutdown (0 v 10 seconds)
2、Phenomenon of the problem: after the test, the screen does not display, but system start normal, read the relevant register values, found DISPC_GFX_ATTRIBUTES value changes
Relating to register:
|
Register |
Normal value |
fault value |
|
DISPC_CONFIG1 |
0x00000C04 |
NULL |
|
DISPC_CONFIG2 |
0x00000000 |
NULL |
|
DISPC_CONFIG3 |
0x00000000 |
NULL |
|
DISPC_GLOBAL_ALPHA |
0xFFFFFFFF |
NULL |
|
DISPC_TRANS_COLOR0 |
0x00000000 |
NULL |
|
DISPC_TRANS_COLOR1 |
0x00000000 |
NULL |
|
DISPC_TRANS_COLOR2 |
0x00000000 |
NULL |
|
DISPC_TRANS_COLOR3 |
0x00000000 |
NULL |
|
DISPC_GFX_ATTRIBUTES |
0x0E000891 |
0x0E0000A0 |
|
DISPC_VID1_ATTRIBUTES |
0x02288873 |
NULL |
|
DISPC_VID2_ATTRIBUTES |
0x06008400 |
NULL |
|
DISPC_VID3_ATTRIBUTES |
0x0A288A60 |
NULL |
Why electrical test up and down repeatedly, can let the register values change?
