Hi all,
I was trying to use SystemView with a Texas Instruments RM57 series MCU. I am using the J-Link Base with the latest J-Link software, hardware version 10.10.
From the SystemView FAQ:
Can I do continuous recording on Cortex-A or Cortex-R devices?
It is done via the AHB-AP. If your device has AHB-AP, you can continuously record with SystemView.
According to the TI document for this product, ti.com/lit/an/spna202/spna202.pdf I see:
When I connect to my target in SystemView, I see:
J-Link>RTT is running in stop mode: wiki.segger.com/RTT#Stop_mode
And it is clearly running in stop mode - I can tell from the trace where the memory access is occuring - there will be periods of about 100 ms where I see no system tick interrupts.
When I start JLinkExe, I see an AHB-AP detected.
Is there something I can do to get Background Mode working for this chip?
Thanks for the help!
Here is my JLinkExe output upon connecting:
Type "connect" to establish a target connection, '?' for help
J-Link>connect
Device "RM57L843ZWT" selected.
Connecting to target via JTAG
Executing InitTarget()
TotalIRLen = 6, IRPrint = 0x01
J-Link script: ICEPick found, enabling Cortex-M3 core.
TotalIRLen = 6, IRPrint = 0x01
JTAG chain detection found 1 devices:
#0 Id: 0x1B95A02F, IRLen: 06, TI ICEPick
TotalIRLen = 10, IRPrint = 0x0011
JTAG chain detection found 2 devices:
#0 Id: 0x4BA00477, IRLen: 04, CoreSight JTAG-DP
#1 Id: 0x1B95A02F, IRLen: 06, TI ICEPick
Scanning AP map to find all available APs
AP[3]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x44770001)
AP[1]: APB-AP (IDR: 0x24770002)
AP[2]: JTAG-AP (IDR: 0x14760010)
Iterating through AP map to find APB-AP to use
AP[0]: Skipped. Not an APB-AP
AP[1]: APB-AP found
ROMTbl[0][0]: CompAddr: 80001000 CID: B105900D, PID:04-003BBC15 Cortex-R5
Found Cortex-R5 r1p2
8 code breakpoints, 8 data breakpoints
Debug architecture ARMv7.0
Data endian: little
Main ID register: 0x411FC152
I-Cache L1: 32 KB, 256 Sets, 32 Bytes/Line, 4-Way
D-Cache L1: 32 KB, 256 Sets, 32 Bytes/Line, 4-Way
TCM Type register: 0x00010001
MPU Type register: 0x00001000
System control register:
Instruction endian: little
Level-1 instruction cache enabled
Level-1 data cache enabled
MPU enabled
Branch prediction enabled
Executing ResetTarget()
Memory zones:
[0]: Default (Default access mode)
[1]: AHB-AP (AP0) (DMA like acc. in AP0 addr. space)
[2]: APB-AP (AP1) (DMA like acc. in AP1 addr. space)
Cortex-R5 identified.
J-Link>
I was trying to use SystemView with a Texas Instruments RM57 series MCU. I am using the J-Link Base with the latest J-Link software, hardware version 10.10.
From the SystemView FAQ:
Can I do continuous recording on Cortex-A or Cortex-R devices?
It is done via the AHB-AP. If your device has AHB-AP, you can continuously record with SystemView.
According to the TI document for this product, ti.com/lit/an/spna202/spna202.pdf I see:
Hercules™ TMS570LC/RM57Lx Safety Microcontrollers Development Insights Using Debug and Trace Tools wrote:
The DebugAccess Port (DAP) also provides access to memory via AHB-AP and APB-AP via System View and APBView respectively in CCS. Access to runtime memory is done via AHB-AP...
When I connect to my target in SystemView, I see:
J-Link>RTT is running in stop mode: wiki.segger.com/RTT#Stop_mode
And it is clearly running in stop mode - I can tell from the trace where the memory access is occuring - there will be periods of about 100 ms where I see no system tick interrupts.
When I start JLinkExe, I see an AHB-AP detected.
Is there something I can do to get Background Mode working for this chip?
Thanks for the help!
Here is my JLinkExe output upon connecting:
Type "connect" to establish a target connection, '?' for help
J-Link>connect
Device "RM57L843ZWT" selected.
Connecting to target via JTAG
Executing InitTarget()
TotalIRLen = 6, IRPrint = 0x01
J-Link script: ICEPick found, enabling Cortex-M3 core.
TotalIRLen = 6, IRPrint = 0x01
JTAG chain detection found 1 devices:
#0 Id: 0x1B95A02F, IRLen: 06, TI ICEPick
TotalIRLen = 10, IRPrint = 0x0011
JTAG chain detection found 2 devices:
#0 Id: 0x4BA00477, IRLen: 04, CoreSight JTAG-DP
#1 Id: 0x1B95A02F, IRLen: 06, TI ICEPick
Scanning AP map to find all available APs
AP[3]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x44770001)
AP[1]: APB-AP (IDR: 0x24770002)
AP[2]: JTAG-AP (IDR: 0x14760010)
Iterating through AP map to find APB-AP to use
AP[0]: Skipped. Not an APB-AP
AP[1]: APB-AP found
ROMTbl[0][0]: CompAddr: 80001000 CID: B105900D, PID:04-003BBC15 Cortex-R5
Found Cortex-R5 r1p2
8 code breakpoints, 8 data breakpoints
Debug architecture ARMv7.0
Data endian: little
Main ID register: 0x411FC152
I-Cache L1: 32 KB, 256 Sets, 32 Bytes/Line, 4-Way
D-Cache L1: 32 KB, 256 Sets, 32 Bytes/Line, 4-Way
TCM Type register: 0x00010001
MPU Type register: 0x00001000
System control register:
Instruction endian: little
Level-1 instruction cache enabled
Level-1 data cache enabled
MPU enabled
Branch prediction enabled
Executing ResetTarget()
Memory zones:
[0]: Default (Default access mode)
[1]: AHB-AP (AP0) (DMA like acc. in AP0 addr. space)
[2]: APB-AP (AP1) (DMA like acc. in AP1 addr. space)
Cortex-R5 identified.
J-Link>