CMD11E1 Development Board for the Motorola / Freescale 68HC11E1 xiom anufacturing ™ © 2000 1226ٛ Exchange Drive,ٛ Richardson, TX 75081 • (972) 437-3737 FAX (972) 437-3736 email: Salesٛ @axman.com • web: http://www.axman.
CONTENTS GETTING STARTED............................................................................................ 3 Installing the Software..................................................................... 3 Board Startup.................................................................................. 3 Support Software ............................................................................ 4 Software Development.................................................................... 4 TUTORIAL ....
GETTING STARTED The Axiom CMD11E1 single board computer is a fully assembled, fully functional development system for the Motorola 68HC11E1 microcontroller, complete with wall plug power supply and serial cable. Support software for this development board is provided for Windows 95/98/NT operating systems. XP and later systems require a host PC with embedded COM serial port that is PC - AT class compliant. Follow the steps in this section to get started quickly and verify everything is working correctly.
If you do not see the buffalo message prompt like that above, or if the text is garbage, see the TROUBLESHOOTING section at the end of this manual. Support Software There are many useful programs and documents on the included HC11 support CD that can make developing projects on the CMD11E1 easier. You should browse the CD and copy anything you want to your hard drive. See the README.TXT file for a description of what is included.
are available or you can use the free EDIT or NOTEPAD programs that come with your computer. Once your source code is written and saved to a file, you can assemble or compile it to a Motorola S-Record (hex) format. This type of output file usually has a .MOT, .HEX or .S19 file extension and is in a format that can be read by the programming utilities to be programmed into the CMD11E1 board.
HELLO.LST a common listing file which shows the relationship between source and output The listing file is especially helpful to look at when debugging your program. If your program has errors, they will be displayed and no output will be generated, otherwise the listing file will be displayed. Running your application After creating an S-Record file you can "upload" it to the development board for a test run. The provided example “HELLO.
Programming External EEPROM When finished with program development you can program your application into EEPROM so it executes automatically when you apply power to the board. The following procedure does this: 1. Make a backup copy of the HELLO.ASM source code. 2. Use a text editor to modify HELLO.ASM. Change the start of the program to $E000 which is the beginning of the EEPROM in U7. Do this by changing the ”ORG $2400” to ”ORG $E000” . 3.
MEMORY ADDRESS DECODING Address decoding is accomplished using a GAL16V8 programmable logic device. Address lines A<8:15>, AS (address strobe), R/W (read/write), and E (clock) are processed to provide the memory control signals as shown below by default. Custom configurations, differing from that shown below, are also possible. Contact the factory for assistance in redefining the memory map if required.
MEMORY MAP The following memory map is for a 68HC11E9 as shipped in this development board. Other 68HC11 devices in the A and E series may also be used with this board. These optional devices differ in the amount of internal RAM, ROM and EEPROM available and the factory default value of the CONFIG register. Consult the HC11 technical reference manual on the support CD for additional information.
JUMPERS The CMD11E1 board is shipped from the manufacturer with the following default jumper settings: JP1 = OFF JP2 = OFF JP10 = ON JP3 = ON JP4 = ON JP5 = OFF JP6 = ON JP7 = ON JP8 = OFF JP9 = OFF JP13 = OFF Memory socket U5 is shipped with a 32K byte RAM device. U7 is shipped with an 8K byte EEPROM flash memory device. U6 is shipped with a 32K byte EEPROM flash memory device.
Memory Selection Jumpers JP3 – JP10 The factory setting for the jumpers should be correct for the memory devices that came with your board. If you add or modify the type or size of memory, you must change the following jumpers accordingly. All jumpers are two-pin jumpers and are installed vertically. U7 - ROM or EEPROM FFFF U7 E000 JP8 OFF OFF OFF ON JP9 OFF OFF ON OFF JP10 ON OFF OFF ON U7 DEVICE 8k EEPROM 8k EPROM. 32k EPROM. 32k EEPROM. < DEFAULT > JP10 write protects U7 memory device when OFF.
PORTS AND CONNECTORS LCD_PORT The LCD Display interface is connected to the data bus and memory mapped to locations $B5F0 through $B5F3. Addresses $B5F0 and $B5F1 are the Command and Data registers respectfully. The LCD interface supports all OPTREX™ DMC series displays up to 80 characters and provides the most common pinout. Power, ground and Vee are also available at the LCD_PORT connector.
SERIAL PORTS The onboard serial port COM1 is a simple three wire asynchronous serial interface with hard wired Clear to Send (CTS) and Data Terminal Ready (DTR). It is driven by the HC11 internal SCI port using I/O pins PD0 and PD1. These two logic level signals are coupled through an RS232 level shifter to the COM1 connector. COM1 is the default serial interface for the Buffalo Monitor and programming software.
SS: KEBOARD The SS:KEYBOARD interface is available but not brought out to a connector. It can be implemented with software drivers through the SPI feature of the 68HC11. Such a configuration is used with a serially encoded keyboard. This port can also be used as a keypad by using PD<2:5> as column lines with E<1:4> as row lines. Note that E<1:4> are open termination’s with pull-down resistors on the board. E<1:4> are ONLY connected to pins 7, 8, 9, and 10 of the SS:KEYBOARD connector.
AUX_PORT 25 23 { { { { 26 24 The AUX_PORT connector is a dual row 13 pin Berg-style connector (26 pins total) configured as follows: PIN 1 3 5 7 9 11 13 15 17 19 21 23 25 FUNCTION AUX PA7 AUX PA5 AUX PA3 AUX PA1 AUX PC7 AUX PC5 GND AUX PC0 AUX PC2 AUX PB0 AUX PB2 AUX PB4 AUX PB6 PIN 2 4 6 8 10 12 14 16 18 20 22 24 26 21 19 17 15 13 11 9 { { { { { { { { { { { { { { 22 20 18 16 14 12 10 FUNCTION AUX PA6 AUX PA4 AUX PA2 AUX PA0 AUX PC6 AUX PC4 +5 AUX PC1 AUX PC3 AUX PB1 AUX PB3 AUX PB5 AUX PB7 7 { { 8
BUS_PORT The BUS_PORT supports off-board parallel devices. Power (+5V), ground, address lines, data lines, and control lines are brought out to this 34 pin connector.
TROUBLESHOOTING The CMD11E1 board is fully tested and operational before shipping. If it fails to function properly, inspect the board for obvious physical damage first. Ensure that all IC devices in sockets are properly seated. Verify the communications setup as described under GETTING STARTED and see the Tips and Suggestions sections following for more information. The most common problems are improperly configured communications parameters, and attempting to use the wrong COM port. 1.
Tips and Suggestions Following are a number of tips, suggestions and answers to common questions that will solve most problems users have with the CMD11E1 development system. You can download the latest software from the Support section of our web page at: www.axman.com AxIDE • If you’re program code memory, make sure jumpers 1 and 2 are set parallel to the MC68HC11 micro, not pointing away from it.
TABLES TABLE 1. LCD Command Codes Command codes are used for LCD setup and control of character and cursor position. All command codes are written to LCD panel address $B5F0. The BUSY flag (bit 7) should be tested before any command updates to verify that any previous command is completed. A read of the command address $B5F0 will return the BUSY flag status and the current display character location address.
TABLE 3. Buffalo Monitor Commands ASM [
] BF BR [-] []...
