Hi,
I´m new with freescale microcontrollers and I am testing a board with
MK20DX256VLH7 microcontroller. I have startedwith a Project developed with
the Processor Expert tool. In order to develop the application I have
followed step by step "the Processor Expert Software – Microcontrollers
Driver Suite Getting Started Guide" tutorial. Then when I had to test
debugging I saw that the LED was flashing well with the correct frequency,
but I checked that the message sent to Tera Term Application by UART wasn't
correct. Tera Term has received something but there are some strange
characters. The string that I send is "Hello World". The direction where is
stored the string is 0xfc0 allways, although I change the string, and I saw
that all characters are stored in them.
<https://community.nxp.com/servlet/JiveServlet/showImage/2-889025-179793/str
ange_characters.png> Descripción: Strange characters recrived in Tera Term
Application
The configuration is the same in Tera and in AS1 component, the baud rate is
9600, no parity, stop bit, 8 bits, and no control flow.
<https://community.nxp.com/servlet/JiveServlet/showImage/2-889025-179779/Ter
aTermConfiguration.png> Descripción: Tera Term Configuration
<https://community.nxp.com/servlet/JiveServlet/showImage/2-889025-179792/UAR
T_Component_Configuration.png> Descripción: UART Component Configuration
When I execute step by step inside the "AS1_SendBlock" function, I can see
how the characters are saved. For example the character that I can see in
*DeviceDataPrv->OutDataPtr is 0x48h, that is the hexadecimal character of
first letter "H". Then later it is executed the next line:
UART_PDD_EnableInterrupt(UART2_BASE_PTR, UART_PDD_INTERRUPT_TRANSMITTER);
Here I think it´s the sending order. Why don´t send the string correctly?
There are something in the configuration? The configuration should be
different with MK20DX256VLH7? The baud rate is ok?
In my application “AS1_SendBlock” function is executed step by step like it
should be, but when I want to see where the data are sent (in which output
registers) when the transmission interrupt is enable, I don’t know where
because they are unknown for me. Do you Know the registers in which appears
the UART output transmission data or the UART output buffer for
mK20dx256vlh7 microcontroller?? I´m reading in the datasheet and I don´t
find any registers related on them. I want to see if the transmission data
in these registers are the same that I want to transmit and also in order to
compare with data that arrive to Tera application.
I would be very grateful for your help,
Arturo Arteaga
