I have a NXP board type FRDM-KL03Z with bootloader Version 1.11 and PEMicro FRDM-KL03Z Mass Storage/Debug App ver 1.18 installed in the board's auxiliary processor.
Using the ARM GCC toolchain and MCUXpresso SDK 2.3.1, I have successfully built the example "hello_world.elf" file.
I downloaded and installed the USB driver "Windows PEDrivers_install.exe" from http://www.pemicro.com/opensda/index.cfm
Windows 7 Device Manager is showing this under Ports as "OpenSDA - CDC Serial Port (COM4)"
I converted the .elf file to .srec file
(Didn't know how to do this in Windows so I temporarily transferred to a Linux computer and used the following command:
arm-none-eabi-objcopy -O srec hello_world.elf hello_world.srec
Not sure if this conversion step is necessary.)
I then copied "hello_world.srec" to the FRDM-KL03Z board on my Windows 7 pc.
In Windows, I set up a terminal session on PuTTY with serial port COM4, 9600 baud, 8 data bits, 1 stop bit (no Parity, no flow control) specified.
When I pressed the reset button on the the FRDM-KL03Z board, I expected to see "hello world" on the PuTTY screen. But there was no response.
Where have I gone wrong?