Trace:No Synchronization in debugging uVision4

Hi,

I've used LPC13xx, 12MHz for core clock.Ive configured the SWO(LPC_IOCON->PIO0_9 &= ~0x07; LPC_IOCON->PIO0_9 |=0x03;), the Port 0 is enabled and the debugger is also configured in SWD setup..but still it didn't work...:(

Hi,

I've used LPC13xx, 12MHz for core clock.Ive configured the SWO(LPC_IOCON->PIO0_9 &= ~0x07; LPC_IOCON->PIO0_9 |=0x03;), the Port 0 is enabled and the debugger is also configured in SWD setup..but still it didn't work...:(

Hello josh u,

In folder C:\Keil\ARM\Boards\Keil\MCB1000\MCB1343\Blinky you can find file LPC13xx_SWO.ini. Use this INI file to configure LPC13xx for SWO.

If you do not have the latest uVision setup. Here is the file content:

FUNC void DebugSetup (void) {
  _WDWORD(0x40048080, 0x0001005F);  // Enable AHB Clock (GPIO & IOCON)
  _WDWORD(0x400480AC, 0x00000001);  // Enable Trace Clock (Div=1)
  _WDWORD(0x40044064, 0x00000003);  // Enable SWO on P0.9
}

DebugSetup();                       // Debugger Setup

If you run from Flash than you can use this INI file without modification. If you run from RAM than you need to merge the INI file for RAM with this one.

Do not forget to to configure Core Clock to 12000000 in ULINK Cortex Debugger Settings - Trace.

Best Regards,
Martin Guenther

Hello Martin,

Thanks a lot for your response, I really appreciate it. But still I've encountered a problem.
I've merged the code you've posted here in the PreSetup of RAM.ini since I used RAM for debugging, but unfortunately is just the same I can't view the output printf display in the Debug (printf) viewer.
I already configured Debug Settings for enable the trace, core clock is set to 12MHz, PORT0 is enable.But still the IDE display Trace:No Synchronization. As I've read in the ULINK2 User's Guide: Trace Status Message
No Synchronization There are no synchronization packets received from the target. This indicates that the Trace hardware is either not connected or improperly configured.

"Trace hardware is either not connected", the debugger is detected so it really means that the hardware is connected. In Debug tab, SW Device it displays the IDCODE and Device Name of the SW target it detects.
ULINK USB-JTAG/SW Adapter:
SWJ - Checked
Port: SW
"improperly configured", I really don't know if I missed something on this part. I already applied the configuration of ITM Port, and also applied what you have given but still it didn't work. It work only during SIMULATION, if I used the DEBUGGER it don't have an output display.

Thanks.

Hello josh u,

I also tested a RAM application with SWO on a MCB1000 populated with a LPC1343.
I encountered no problems with SWO via ITM port 0.

I used the following INI file:

FUNC void Setup (void) {
  SP = _RDWORD(0x10000000);          // Setup Stack Pointer
  PC = _RDWORD(0x10000004);          // Setup Program Counter
  _WDWORD(0xE000ED08, 0x10000000);   // Setup VTOR register
//  _WDWORD(0x40048000, 0x00000001);   // Interrupt vectors are re-mapped to Static RAM
}

FUNC void SWOSetup (void) {
  _WDWORD(0x40048080, 0x0001005F);   // Enable AHB Clock (GPIO & IOCON)
  _WDWORD(0x400480AC, 0x00000001);   // Enable Trace Clock (Div=1)
  _WDWORD(0x40044064, 0x00000003);   // Enable SWO on P0.9
}

load %L incremental

SWOSetup();                          // SWO Setup
Setup();                             // Setup for Running

g, main

If you use this INI file uncheck Load Application at Startup under Options for Target - Debug.

If you still have problems with SWO then please contact KEIL support (support.intl@keil.com). Please advice support to forward your request to me then I can send you the test project I am using.

Best Regards,
Martin Guenther

Hi Martin,

Theirs one more thing I don't really understand in ITM_SendChar on this line while (ITM->PORT[0].u32 ==0); in which I don't have an idea why the debugger stops in this line when I do debugging on printf.
It stops when it recognized no more character to be read.

Thanks.

Hello josh u,

The while loop while (ITM->PORT[0].u32 == 0); runs as long as the stimulus port register is not empty.

Read access to a stimulus port register returns the FIFO status. 0 = full, 1 = not full.

ITM Stimulus Ports 0-31

Each of the 32 stimulus ports has its own address. A write to one of these locations
causes data to be written into the FIFO if the corresponding bit in the Trace Enable
Register is set. Reading from any of the stimulus ports returns the FIFO status in bit [0]:
• 0 = full
• 1 = not full.

Best Regards,
Martin Guenther

Hi Josh,

Were you able to solve the Trace: No Synchronization issue?

I'm having the same issue you and "Nick L" had on http://www.keil.com/forum/17897/. Unfortunately I can't post any more on that thread because it's classified as read only...

I'm using MCBSTM32, MDKARM 4.20 and ULINK2.

I have tried several ITM Trace examples (Blink examples), created my own example, based on the my limited knowledge about the ITM, and all the attempts did not work on the eval board and also on my own hardware.

I have inspected the SWO line with a Digital Scope and the bit timing is correct, it means the Core clock setting is correct. Also tried different SWJ Max Clock speeds settings ranging from 500KHz to 10MHz. At some time during the test I used an "premium" quality USB Cable. Signal integrity is not being an issue here.

UV4 DB will always display Trace: Running and then 3 seconds latter, Trace: No Synchronization. No data from ITM is displayed.

I would appreciate in case you solved and could share the solution.

Regards,

Alex