Introduction To CodeWarrior For MC9S12DP256

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Introduction To CodeWarrior -For
MC9S12DP256

• January 23, 2008,
• Author Jilin Zhou,
• Modified M. Islam

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MC9S12DP256
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General Description

• 16-bit CPU, 16-bit data bus
• Memory
• 256K bytes flash EEPROM
• 12K bytes of RAM
• 4K bytes of EEPROM
• Functionalities
• 2 asynchronous SCI, 3 SPI
• 8-channel IC/OC enhanced capture timer
• 2 10-bit ADC
• 8-channel PWM
• and more

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D-Bug12 EVB Mode Memory Map
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Registers

• Address (0000 - 03FF)
• Data registers
• Control registers
• Status registers

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RAM Interrupt Vector Table
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Power up

• Two methods
• Take a careful look of Pin diagram
• H2 expansion Pin 49 (ground) and Pin 50 (5v)
• External DC power 6 12 V
• Do not power both
• Bypass capacitor should be put as close to the
  MCU as possible because fast signal transitions
  place high, short-duration current demands on the
  power supply

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Administrative

• Each team gets two fixed work stations.
• Clean up before you leave.
• Weekly report no later than Saturday night.
• Email to jzhou_at_discover.uottawa.ca , put
  ELG4910 Team in the email subject
• www.discover.uottawa.ca/jzhou
• Try solve the problems by yourselves.
• Dont forget google ?more powerful than you think!

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Metrowerks CodeWarrior

• Important directories
• C\Program Files\Metrowerks\CodeWarrior
  CW12_V2.0\
• Application Notes, CodeWarrior Manuals
• C\Program Files\Metrowerks\CodeWarrior
  CW12_V2.0\lib\HC12c\INCLUDE

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The 13 Steps

• Start Metrowerks IDE (Integrated Development
  Environment)
• Create a Project (container of files and code)
• Add source, header files to the project
• Add include files e.g. 6812dp256.h to the Project
• Go to the Prm folder and adjust the memory map
• Compile/Assemble the code by click on Make
• Produce object code with an extension .s19
• Convert the .s19 files header to the target
  processor
• Open the MiniIDE (to load the executable to the
  board)
• Reset the HCS12 board
• Set Terminal options, COM1 or 2 port, Baud Rate
  etc.
• Load the executable to the board
• Go to the address 1829 to start execution

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• File?New? HC12 Stationary

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Creat a project in CodeWarrior

• Select Legacy? Sdi Target Interface ? 9S12Dp256

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Create a Project in CodeWarrior
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Project Files

• Go to the stored location of the project
• You should see some directories
• bin
• cmd
• prm
• sources
• .ini
• Your source codes should go to sources directory.

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Build Process
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Set Memory Parameters

• Select Prm directory ?open ram.prm

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Set Communication to MCU

• Open MiniIDE

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Set Communication to MCU

• Terminal ? options
• COM1 or COM2
• No flow control

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Set Communication to MCU

• Power the mcu ? reset it

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Load the program

• MiniIDE
• Terminal ?show terminal window
• Reset the microcontroller
• You should see the prompt Dbug-12 command window
• Type Help to see all the commands
• Type load
• ? go to Terminal ? Download Files ? choose the
  .s19 file
• Run the program (be careful with start address)

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Run the program

• Find the start address of program in /bin/.map

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.s19 header problem

• The .s19 generated by codewarrior cannot be
  downloaded to board directly since it has too
  long header that D-Bug12 cannot recognize. Check
  it.
• Go to my website and download the converter
• Put it in /bin and create a .bat file to do it
• SRecChgHdr oldname.s19 newname.s19

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Typical S19 File Layout

• S00600004844521B Header
• S1130000285F245F2212226A000424290008237C2A
• S11300100002000800082629001853812341001813
• S113002041E900084E42234300182342000824A952
• S107003000144ED492
• S5030004F8 Count of S1 Recs
• S9030000FC Last Record, Load address

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Check sum calculation

• Byte wise add all fields except the type.
• Truncate the sum to the LSB
• Checksum Ones complement