Ryohei,

You are correct that the value specified in the datasheet is time from POR to code execution.  Debug connection should be available soon after that.  Typically when a debug connection is needed from the start, the debugger will reset the part, then run code with the debugger.

Are you interested in having the debugger connected from the start of the program, or are you particularly interested in connecting right after Power On Reset?

Regards,

Joe

After posting my question, I developed this:

1. Conversion of two eight bit registers to an integer Y;

Register A (8 bits) & Register B (8bits), where A is the MSByte

Integer Y = A * 256 + B

2. Conversion of Y to two eight bit registers A & B;

Register A (8 bits) & Register B (8 bits), where 0<= Y <= 65535

Register A = int ( Y / 256 ), where Register A is the MSByte

Register B = int (Y ) - A * 256

Hi SoCal,

There are some timer0 examples, including 16 bit in Simplicity Studio, for example EFM8BB1_Timer0_16bit.  Which EFM8 part are you using?

There aren't any library functions to break a 16 bit variable into two 8 bit registers (and the other way around), but it can be done with bit masking and shifting.

Please let me know if you have any further questions.

Regards,

Joe

Hi Sebastian,

We have discussed this on a support ticket as well, but I think there is another source of power consumption on your board.  The crossbar is not required to be disabled in sleep mode.

Regards,

Joe

Hi Sebastian,

We have discussed this on a support ticket as well, but I think there is another source of power consumption on your board.  The crossbar is not required to be disabled in sleep mode.

Regards,

Joe

Can you provide more information about how the data from the other device is not correct?

 - Do you receive the number of bytes you expect, or do you get more or less than you expect?

 - Is each byte correct, or are there bit errors?  Is there a pattern to them?  For example, are they shifted, 0s where 1s are expected, 1s where 0s are expected?

 - Are there errors sending and receiving, or only one way?

 - Does changing the baud rate (for example, to a slower baud rate) improve any of this?

Regards,

Joe

The Giant Gecko does not support using JTAG for circuit testing such as boundary scanning to test IO pins.  The Giant Gecko can be part of a scan chain using the JTAG pins.

Regards,

Joe

Hi Amos,

The connections on port 701 go to the board controller (the debugger chip) not the EFM8UB2.  In order to connect the UART of the UB2 to a port, use the pins on P100, J101, or J102.

Can you provide more detail about what is going wrong when running our example software?  Are you able to send data from the part?  If not, what do you see if you look at the UART TX pin with a scope?

Regards,

Joe 

Do you see any activity on the pins if you view it with an oscilloscope?

Do you see any activity if, instead of using printf you write directly to the SBUF1 register?

Regards,

Joe