ST SPC560P34 - Table 177. EDMA_ESR Field Descriptions; Figure 178. Edma Error Status Register (EDMA_ESR)

Enhanced Direct Memory Access (eDMA) RM0046
388/936 Doc ID 16912 Rev 5
The occurrence of any type of error causes the eDMA engine to stop the active channel,
and the appropriate channel bit in the eDMA error register to be asserted. At the same time,
the details of the error condition are loaded into the EDMA_ESR. The major loop complete
indicators, setting the transfer control descriptor DONE flag and the possible assertion of an
interrupt request, are not affected when an error is detected. After the error status has been
updated, the eDMA engine continues to operate by servicing the next appropriate channel.
A channel that experiences an error condition is not automatically disabled. If a channel is
terminated by an error and then issues another service request before the error is fixed, that
channel executes and terminates with the same error condition.
Figure 178. eDMA Error Status Register (EDMA_ESR)
Address: Base + 0x0004 Access: User read-only
0123456789101112131415
RVLD 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
Reset0000000000000000
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R GPE CPE ERRCHN SAE SOE DAE DOE NCE SGE SBE DBE
W
Reset0000000000000000
Table 177. EDMA_ESR field descriptions
Field Description
0
VLD
Logical OR of all EDMA_ERH and EDMA_ERL status bits.
0 No EDMA_ER bits are set.
1 At least one EDMA_ER bit is set indicating a valid error exists that has not been cleared.
1–15 Reserved.
16
GPE
Group priority error.
0 No group priority error.
1 The last recorded error was a configuration error among the group priorities indicating not all
group priorities are unique.
17
CPE
Channel priority error.
0 No channel priority error.
1 The last recorded error was a configuration error in the channel priorities within a group,
indicating not all channel priorities within a group are unique.
18–23
ERRCHN[0:5]
Error channel number. Channel number of the last recorded error (excluding GPE and CPE
errors).
Do not rely on the number in the ERRCHN field for group and channel priority errors. Group and channel
priority errors need to be resolved by inspection. The application code must interrogate the priority
registers to find groups or channels with duplicate priority level.
24
SAE
Source address error.
0 No source address configuration error.
1 The last recorded error was a configuration error detected in the TCD.SADDR field, indicating
TCD.SADDR is inconsistent with TCD.SSIZE.