AN2600 Freescale Semiconductor / Motorola, AN2600 Datasheet - Page 9

• Manufacturer Part Number: AN2600
• Description: A Simple Keypad Using LIN with the MC68HC908QT/QY MCU
• Manufacturer: Freescale Semiconductor / Motorola

Project Creation
MOTOROLA
A Simple Keypad Using LIN with the MC68HC908QT/QY MCU
A list of all the operations necessary to setup the LINmsg.c file is presented
here:
U8 volatile Message0x1A[2];
U8 volatile Message0x5B[2];
U8 volatile * MessagePointerTbl[] = {Message0x1A, Message0x5B};
U8 const near IdTbl[] = {0x1A, 0x5B};
U8 const near MessageCountTbl[] = {0x13, 0x03};
This section is a brief description of how to create a new project based on the
Motorola LIN QY/QT driver software. For more detail, see AN2599/D.
1. Create a message buffer for the frame data field of each application
2. Define a pointer array MessagePointerTbl[] containing pointers to all
3. Create an identifier table (array) IdTbl[] containing all IDs relevant to this
4. Finally, it is necessary to define an array variable MessageCountTbl[]. It
1. Create a new project in Metrowerks CodeWarrior development system.
2. Copy the Motorola LIN QY/QT driver software into the folder structure of
3. Add the Motorola LIN QY/QT driver software into the CodeWarrior
4. In the application source file (e.g., LIN_Keypad_QY.c), include the LIN
5. Define the messages in the LINmsg.c file as described in
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message.
message buffers of the application.
node. Note that it must be set up in the same order as in the case of
MessagePointerTbl[] and MessageCountTbl[]. Furthermore, message
IDs must have parity bits included.
is a table which defines (for each existing message) a length of the frame
data and the checksum fields. It also indicates whether the specific
message should be sent or received. The least significant half-byte of
each entry denotes the length of the data and checksum fields (length of
the checksum field is equal to 1), and the most significant half-byte is
equal to 1 for message reception and 0 for transmission. In addition, it
could also be equal to 0xF (ignore), which means that the message is
ignored unless it has been updated since it was last read/written.
the project (for example into the folders lin_src and lin_inc). The driver
consists of LINapi.c, LINdriver.c, LINdriver.h, LINmsg.c, and
Tx_Config.h files.
project tree (for example into the folders Sources\Driver source and
Sources\Driver config).
driver with:
#include "LINdriver.h"
Configuration
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File.
// ID 0x1A = 0x1A with parity
// ID 0x1B = 0x5B with parity
Application Software
LIN Message
AN2600/D
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