Since october last year I am debugging a board with two "Atmel SAM4S16B" installed. But when setting bit 31 (USEQ) in register at address 0x40038004 (ADC Mode Register) to 1, the SAM-ICE aborts the debug session with this error message:

J-Link V4.84c Error

The connected debug probe is not licensed for the selected device "ATSAM4S16B".
Reason: Could not read emulator information
Debug session will be terminated

When this bit is set to 0, this error message will not occur and the debug session won't be terminated. But I have to set this bit to 1.

OS: Windows10
Development system: Atmel Studio 6.2 and Atmel Studio 7 (v. 7.0.1188)
Updating the firmware of the SAM-ICE V8.00 with SEGGER J-Link Configurator has not changed this behaveior.

Any help appreacheated.
Regards, Anton

Hello Nino,

thank you for your response. Before my first post I have downloaded the J-Link software package components and updated the firmware of the Atmel SAM-ICE V8.00. When doing this again I get this Log:

SEGGER J-Link Configuration V6.12j
Logging started @ 2017-02-28 09:39

Updating firmware of 1 emulator:
Updating firmware of emulator 1 of 1 via USB (SN: 28015796)... Not updated, emulator firmware is already up to date.
Finished updating 1 emulator!

When writing 0xA1080420 to address 0x40038004 (ADC Mode Register) the SAM-ICE aborts the debug session. After the firmware update without the error message.

The same behavior when writing 0x00008020 to address 0x40038010 (ADC Channel Enable Register).

How can I update from V6.12j to V6.14 ?
Regards, Anton

Hello Nino,

thanks for the info. But after updating to V6.14a the behavior is the same as before.
The write protection (WPEN) is not set. The contents of Register 0x400380E4 = 0.

I have tested my software on the evaluation board "Sam4S Xplained Pro" with the embedded Atmel debugger without any issues. The ADC is working with and without DMA as expected.

Will a "Write Protection Violation" abort the debug session by the J-Link?
Regards, Anton

Hello Nino,

first I wrote 0x21080420 to the ADC Mode Register. The contents of the register has shown the written data, but the ADC didn't work as expected. After writing the correct value 0xA1080420 to the ADC Mode Register, the debug session was aborted.

Then I tried a simpler way of reading channel 5 and 15 without setting bit 31 (USEQ) in the ADC Mode Register. But when writing 0x00008020 into the ADC Channel Enable Register (0x40038010), the debug session was aborted too.

The connection from J-Link to my hardware does not contain the signal SWO. There are only VTref, SWDIO, nRESET, SWCLK and GND used.

I hope this helps.
Regards, Anton

Hello Nino,

another hint: When writing the values 1, 3, 7, 15, and 31 into the ADC Channel Enable Register, the debug session was not aborted. Values >= 32 will abort the debug session.

Regards, Anton

Hello Nino,

Thank you for your support. This behavior was caused by a side effect of my hardware .
I have tested with a J-Link BASE too. With the same result as with the Atmel SAM-ICE.
Both debug probes are working fine .

Best regards, Anton