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Application Note
AN2264/D
Rev. 0, 3/2002
LIN Node Temperature
Display
by
Peter Topping
8/16 Bit Applications Engineering
Motorola, East Kilbride
Introduction
Many of the problems of excessive wiring within a car can be resolved by using
a serial multiplex bus like CAN or LIN. The LIN (Local Interconnect Network,
reference 1) bus is lower in cost and ideally suited to use within a door or in
other areas in the car where its limited data rate of 20,000 baud is adequate.
The display of external temperature is an application which falls into this
category. As a common location for the outside temperature sensor is in a wing
mirror, the data often originates from the door. The actual display is, however,
within the car some distance away and the LIN bus is eminently suitable to
facilitate the connection. A LIN node requires only 3 wires; there is one LIN data
line, the other two connections being the positive and negative supplies.
This application note presents the design of a temperature display LIN slave
node. It was developed as part of a complete door project which also included
the keypad module described in application note AN2205. The messaging
scheme for the door incorporated a byte for temperature in the mirror response
field as shown in table 1. The LIN master is, in this case, the body controller.
On a regular basis, say every 100ms, the master sends a frame header with
the mirror’s ID and it responds with the two-byte message shown. It includes a
byte with the temperature encoded in half Centigrade degree increments from
–30°C to 97.5°C. In this case the data is read directly by the temperature
display node (slave to slave communication) but could alternatively be read by
the master and retransmitted to the relevant slave node.
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ID
$CA
Temperature Sensor
(byte 0)
Error status.
(byte 1)
bit 0
LIN – bit error
bit 1
LIN – checksum error
bit 2
bit 3
bit 4
LIN – identifier parity error
Temperature sensor data encoded
in half Centigrade degree
increments from –30°C ($00) to
97.5°C ($FF).
LIN – slave not responding error
LIN – inconsistent sync. error
bit 5
LIN – no bus activity error
bit 6
not used
bit 7
not used
Table 1. Format of mirror response data
Hardware
The target MCU for the temperature display module is the MC68HC908EY16.
As this MCU was not available at the time of writing, this application note
employs an MC68HC908AZ60A. Implementation on an MC68HC908EY16
would significantly reduce the cost. Not only is the MC68HC908EY16 a lower
pin-count lower cost device but it will include an on-chip Internal Clock
Generator (ICG) obviating the need for a crystal or ceramic resonator.
The circuit diagram used in the temperature display application is shown in
figure 1. Apart from the MCU itself, two chips are required to facilitate a simple
LIN node. These are the LIN interface, in this case the MC33399 and a 5 volt
regulator. These chips will be replaced in the future by a single chip, the LIN
SBC. The regulator used is the 8-pin LT1121 which has the capability of
shutting down into a low power sleep mode under the control of the MCU. In
the arrangement shown it can be woken up via the MC33399 by LIN bus
activity.
The MC33399 includes the 30kohm LIN pull-up so this does not need to be
included on the PCB. The only discrete components required are pull-up
resistors for the IRQ and Reset pins, decoupling capacitors and a crystal and
its associated components. Two PortC pull-ups and a 9 volts zener circuit were
also included to facilitate entry into monitor mode using an external serial
interface. This facilitated in-circuit programming of the on-chip flash memory.
The software was developed on the prototype PCB fitted with a target header
for the MMDS development system rather than with an actual
MC68HC908AZ60A.
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As the LEDs are driven directly by the MCU, care had to be taken to avoid
drawing excessive currents from port pins or exceeding the specified current or
dissipation capability of the 5 volt regulator. The digit current for an acceptable
brightness is too high for a port pin so FET buffers are incorporated. The
segment resistors of 220R were chosen to give a segment current of 10mA so
the digit current can be up to 80mA. As the digits are driven with a 25% duty
cycle this corresponds to an average current of 2.5mA per segment and 20mA
for a digit with all 8 segments lit. The highest total current is drawn with a display
of 88.0. This involves 21 active segments which, with a duty cycle of 25%,
requires 52.5mA (2.5mA x 21).
1 segment
1 digit (all segments)
Display: 88.0
Peak
10mA
80mA
80mA
Average
2.5mA
20mA
52.5mA
With an MCU Idd of 15mA and 9 volts across the regulator (assuming a VBat of
14volts), the maximum dissipation of the LT1121 can be calculated:
Dissipation = 9volts x (52.5mA+15mA) ~ 610mW.
With an assumed ambient temperature of 26°C and a junction to ambient
thermal resistance of 100C°/W, the maximum junction temperature of the
LT1121 is:
TJ = TAmb + 610mW x 100C°/W = 26 + 61 = 87°C
This is well within the specified maximum of 125°C. If a significantly higher
segment current were required, then segment drivers and a higher dissipation
regulator should be employed.
Current versions of the MC68HC908AZ60A data sheet specify a maximum
total source current of only 10mA. This was inserted as an interim figure while
characterisation was done to check that the Voh and Vol level specifications
were met under all possible conditions. In this application these levels are not
critical so the only concern is that the total current is not high enough to cause
long term damage to the device. There is, however no risk of this as long as the
absolute maximum figure of 100mA per pin is observed. In this case the
maximum Idd is significantly less than 100mA. Future versions of the data
sheet will remove this unnecessary limitation.
A simple sleep mode was incorporated in the module when no bus activity
occurs for 2 seconds. When this condition is detected, the MCU lowers the
enable line to the MC33399 which in turn lowers the inhibit signal to the LT1121
regulator. The regulator goes into its standby mode and powers down the MCU.
A resumption of bus activity wakes the MC33399 and the regulator switches the
MCU on. In order to facilitate low sleep mode current consumption, an
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additional link was included to isolate the zener diode used to supply the high
voltage required to enter monitor mode. The measured current consumption in
sleep mode was 40µA. This is the combined standby current of the MC33399
and the LT1121 (both about 20µΑ).
8
Vbat
1
LT1121
5
3
100k
7
3
13
4
2
1
1
CAN unused:
I/O unused:
2
31
--64
LIN
22
55
44
54
10k
jumper
jumper
1k
2
IRQ
22pF
22pF
0.1uF
Vdd
Vdda
Vddaref
Vrefh
Reset
59
Osc1
58
Osc2
220 x 8
D0
9.1volt
zener
6
8
Vsup
INH
EN
2
LIN
MC33399
3
D1
D2
7
4
Tx
Rx
Wake
15
13
1
14
E2
MC68HC908AZ60A
D3
D4
E0
E1
D5
D6
Gnd
57
5
LIN Temperature display
node (AZ60A)
8MHz
3
SCI
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100k
Supply/ref:
Oscillator:
I/O:
Monitor:
SCI:
IRQ:
Reset:
10M
Vdd (5 volts)
CGMXFC
D7
42
dp
43
g
46
f
47
e
50
d
51
c
52
b
53
a
4-digit
7-segment
common-cathode
LED
display
22nF
100k
61
C1
Vdd
F3
100k x 2
F2
60
63
C0
F1
C3
F0
Monitor mode
26
7
6
5
4
FDV303N x 4
A0
Vss
Vssa
Avss/Vrefl
21
56
45
Figure 1. Temperature display module circuit diagram
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Software
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The temperature display module uses the Motorola/Metrowerks LIN drivers so
all I/O activity is handled outwith the application code which simply uses a
“LIN_GetMsg()” to receive the data provided by the sensor in the door mirror.
The use of the LIN drivers results in fairly simple application software for the
temperature node. In order to respond to a master request command frame (ID
0x3C), the user code has to include the function void LIN_Command(). This is,
for instance, how the master would request all slave nodes to go into their
low-power standby or “sleep” mode. In this application, sleep mode is entered
when there is no bus activity and this function is just a dummy while(1).
The main software flow diagram is shown in figure 2 and the complete code
listed in section 5. Once the variables have been declared, the CONFIG and
I/O registers are initialised. The CONFIG1 value of 0x71 disables the COP
while the CONFIG2 value of 0x19 configures the MCU as an
MC68HC908AZ60A (as opposed to an AS60A). Interrupts are enabled so that
the LIN drivers, once initialised by LIN_init(), can function. The main while loop
uses the programmable interrupt timer (PIT) to facilitate a 200Hz repetition rate
based on an 8MHz crystal. Once every 5ms the PIT overflow flag is set and the
main loop is executed to convert the binary input data into 7-segment format.
The 200Hz rate is also used to cycle round the 4 LED digits facilitating a flicker
free 50Hz multiplexed display. Although the LIN buffer is read and the
temperature converted into 4-digit 7-segment format every time, only one digit
is actually driven every 5ms.
The LIN driver function LIN_IdleClock can check whether or not there is any
bus activity. If not it increments a counter whose value is compared with
LIN_IDLETIMEOUT (defined in slave.cfg). If this number is exceeded the
function LIN_DriverStatus() ceases to return a 1 (LIN_STATUS_RUN)
indicating that the bus has been idle for, in this application, 2 seconds. If this is
detected, the enable pin of the MC33399 is taken low and the MCU is powered
down by the disabling of the LT1121. The code also sets the display to “….”.
This is irrelevant in the powered down application but gave an indication of a
detected idle condition in the development environment where the emulated
MCU’s power was not controlled by the LT1121. In this application it also made
sense to show a special display if temperature data was not being provided to
the module. Without this addition the display would continue to show the last
received temperature (or –30°C if none had been received since the last power
up). This feature was incorporated using LIN_MsgStatus(0x0A) in conjunction
with the variable error_count and forces the display to “----” after a second of
not receiving a LIN message with an ID of 0A (see figure 4).
To perform the conversion, the temperature byte is transferred to the variable
bits and, if the temperature is positive, the offset of 60 (30 C°) subtracted. This
would result in an incorrect underflowed value in bits if the temperature is
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negative (<60) so if this is the case the subtraction is done the other way round
(60 – bits) to give a sensible (but positive) value. The fact that it was actually
negative is recorded by setting the negative flag.
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The value in bits is then converted as shown in figure 3 into the required
7-segment format using the array seg. Firstly the digit after the decimal point is
configured as a 0 or a 5 according to the least significant bit in bits. Bits is then
divided by two to yield the binary temperature in °C. This is divided again by ten
to give the tens digit while the units digit is the remainder from this division. The
units, tens and sign (hundreds) digits are then configured with the appropriate
segments, the only complications being the addition of the decimal point to the
units digit and the various possibilities for the tens digit. If the tens digit
constitutes a leading zero then it should be blank unless the temperature is
negative. In this case the display is neater if the negative sign is displayed in
the tens position rather than in the hundreds position.
To output information to the LED display, dcount is incremented and the digit
to be driven this time around the loop is selected by using the two least
significant bits of the variable dcount. They are used as an index in the array
display for the segment data going to portD and also in scan for the digit drive
to portF.
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Software
LIN wake-up switches MCU supply on
Initialize CONFIG, ports, PIT and LIN
drivers. Enable interrupts
POF set ?
N
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Y
Clear POF
Check LIN bus status
Active ?
N
Enter sleep mode by putting the regulator
into standby mode via the MC33399
(MCU is switched off)
Y
ID: 0A ?
N
(figure 4)
Set display array to ----
Y
Read binary temperature from LIN buffer
into variable temp
60 or more ?
N
Negative temperature
temp = 60 - temp
set negative flag
Y
Positive temperature
temp = temp - 60
clear negative flag
Convert temp to BCD and place half
degree digit, units digit (with decimal
point), tens digit (blanked if zero) and
minus sign (if temperature negative)
into display array (see figure 3)
Increment digit and
output current digit to port lines
Figure 2. Main software flow chart
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N
Set digit after decimal point in display array to 5
LS bit a 0 ?
Y
Clear digit after decimal point in display array
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Divide temp by two to give ºC
Divide by 10 to give tens digit
Put units (remainder) into display array with decimal point
Clear tens and hundreds digits in display array
Is tens digit of
temperature 0 ?
N
Put tens digit into display array
Y
Is temperature
negative ?
N
Y
Put minus sign into hundreds digit of display array
Is temperature
negative ?
N
Y
Put minus sign into tens digit of display array
Figure 3. Flow chart to fill display array with data
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References
LIN message with ID
0A received since
last read ?
Y
N
Has this happened
200 times ?
N
Increment error counter
Y
Reset error counter
Is error counter less
than 200 ?
N
Set display array to ----
Y
Normal temperature display
Figure 4. Flow chart of temperature message presence detection
References
1. LIN Protocol Specification, Version 1.2, 17 November 2000.
2. LIN08 Driver User’s Manual rev 1.1, 13 March 2001.
3. MC68HC908AZ60A Technical Data.
4. MC68HC908EY16A Advance Information.
5. AN2205, Car door keypad using LIN, November 2001.
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Software listing
/******************************************************************************
Motorola reserves the right to make changes without further notice to any
Product herein to improve reliability, function, or design. Motorola does not
assume any liability arising out of the application or use of any product,
circuit or software described herein; neither does it convey any licensed under
its patent rights nor the right of others. Motorola products are not designed,
intended or authorised for use as components intended for surgical implant into
the body, or other applications intended to support life, or any other
application in which failure of the Motorola product could create a situation
where personal injury or death may occur. Should Buyer purchase or use Motorola
products for any such intended or unauthorised application, Buyer shall
indemnify and hold Motorola and its officers, employees, subsidiaries,
affiliates, and distributors harmless against all claims, costs, damages,
expenses and reasonable attorney fees arising out of, directly or indirectly,
any claim of personal injury or death associated with such unintended or
unauthorised use, even if such a claim alleges that Motorola was negligent
regarding the design or manufacture of the part. Motorola and the Motorola logo
are registered trademarks of Motorola Ltd.
******************************************************************************/
/******************************************************************************
*
*
LIN Temperature Display Node - MC68HC908AZ60A
*
==============================================
*
*
Originator:
P. Topping
*
Date:
28th November 2001
*
Modified:
5th January 2002
*
Comment:
Sleep facility added
*
******************************************************************************/
/******************************************************************************
*
*
Globals and header files
*
******************************************************************************/
#include <hc08az60.h>
#include <linapi.h>
unsigned
unsigned
unsigned
unsigned
unsigned
10
char
char
char
char
char
Mirror_data[2];
display[4];
scan[4]= {0x08,0x02,0x04,0x01};
seg7[10]= {0xFC,0x60,0xDA,0xF2,0x66,0xB6,0xBE,0xE0,0xFE,0xF6};
dcount;
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Software listing
/******************************************************************************
*
* Function:
LIN_Command
* Description:
User call-back.
*
Called by the driver after successful transmission or
*
receiving of the Master Request Command Frame (ID: 0x3C).
* Returns:
never returns
*
******************************************************************************/
void LIN_Command()
{
while (1)
{
}
}
/*****************************************************************************
*
*
Function name: Main
*
Originator:
P. Topping
*
Date:
5th January 2002
*
******************************************************************************/
void main (void)
{
unsigned
unsigned
unsigned
unsigned
unsigned
char
char
char
char
char
bits;
units;
tens;
negative;
error_count;
CONFIG1 = 0x31;
CONFIG2 = 0x11;
/* disable LVI and COP
/* AZ60A, MSCAN disabled
*/
*/
DDRA
DDRB
DDRC
DDRD
DDRE
DDRF
DDRG
DDRH
=
=
=
=
=
=
=
=
/* configure unused port
/* pins as outputs
*/
*/
PTE
= 0x04;
0xFF;
0xFF;
0x3F;
0xFF;
0xFD;
0x7F;
0x07;
0x03;
/* segment drive
*/
/* LIN interface (MC33399) */
/* digit drive via FETs
*/
/* MC33399 enable high
*/
asm CLI;
/* clear interrupt mask
*/
LIN_Init();
/* initialise LIN drivers
*/
PITSC = 0x10;
PMODH = 0x27;
PMODL = 0x10;
/* start PIT at /1
*/
/* /10000 for a repetition */
/* rate of 200Hz @ 8MHz.
*/
while (1)
{
if (PITSC & 0x80)
/* is PIT overflow set?
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{
12
PITSC &= ~(0x80);
/* yes, clear it
*/
LIN_IdleClock ();
if (LIN_DriverStatus () != 0x01)
{
display[0] = 0x01;
display[1] = 0x01;
display[2] = 0x01;
display[3] = 0x01;
PTE
= 0x00;
}
else
{
if (LIN_MsgStatus (0x0A) != 0)
{
if (error_count < 201 )
{
error_count ++;
}
}
else
{
error_count = 0;
}
/* check for bus activity */
/* bus idle for 400 trys ? */
/*
/*
/*
/*
/*
LIN_STATUS_IDLE is 2
but 3 is returned
display ....(MMDS only)
real AZ60A powers down
from MC33399 enable low
*/
*/
*/
*/
*/
/*
/*
/*
/*
/*
bus active but have we
had an ID of 0x0A ?
no, error counter
already 201 ?
no, inc error counter
*/
*/
*/
*/
*/
/* yes, new data available */
if (error_count > 200)
{
display[0] = 0x02;
display[1] = 0x02;
display[2] = 0x02;
display[3] = 0x02;
}
/* data in last second ?
*/
/*
/*
/*
/*
*/
*/
*/
*/
else
{
/* yes, data available
*/
LIN_GetMsg (0x0A, Mirror_data);
bits = Mirror_data[0];
/* read sensor message
/* and extract temp. byte
*/
*/
if (bits < 60)
{
bits = 60 - bits;
negative = 1;
}
else
{
bits = bits - 60;
negative = 0;
}
/* negative ?
*/
display[3] = seg7[0];
if (bits & 0x01 == 0x01)
{
display[3] = seg7[5];
}
/* display zero after
*/
/* decimal point but if LS */
/* bit is a 1 display 5
*/
bits = bits/2;
tens = bits/10;
units = bits%10;
/* lose LS bit
/* find tens digit
/* and units digit
*/
*/
*/
no, display ---to signify no valid
data from temperature
sensor
/* yes,convert to positive */
/* but remember it wasn’t */
/* no, remove offset and
/* clear negative flag
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*/
*/
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}
display[2] = 1 | seg7[units];
/* units w. decimal point
*/
display[1] = 0x00;
display[0] = 0x00;
if (tens != 0)
{
display[1] = seg7[tens];
if (negative)
{
display[0] = 0x02;
}
}
else if (negative)
{
display[1] = 0x02;
}
/* clear tens digit
/* and hundreds digit
/* tens digit zero ?
*/
*/
*/
/* no, display it
/* negative ?
*/
*/
/* yes put "-" in hundreds */
/* tens zero, negative ?
*/
/* yes, put "-" in tens
*/
/*
*/
}
dcount ++;
/* increment digit counter */
PTF = (PTF & 0xF0) | scan[dcount & 0x03]; /* and use the two LS bits */
PTD = display[dcount & 0x03];
/* to get data from arrays */
}
}
}
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Appendix I — LIN driver project set-up
This application was developed on a Motorola MMDS development system
using the Metrowerks Codewarrior development environment. The easiest way
to generate an MC68HC908AZ60A LIN Codewarrior project is to “clone” the
example application included with the LIN drivers. This automatically ensures
that the compiling, linking and building process is configured correctly. An
appropriate procedure is shown below.
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1. In the LIN driver directory …\lin08\sample, make an additional copy of
the folder slave and give it an appropriate name. In this application
temp08 was used.
2. Delete the slave.c source file from the new folder
…\lin08\sample\temp08 and add application source file(s).
3. In the LIN driver directory …\lin08\sample\ide, make an additional copy
of the folder slave and give it the same name as that used in step 1.
4. Delete all files from
…\lin08\sample\ide\temp08\slave_Data\LIN08_slave\objectCode and
…\lin08\sample\ide\temp08\bin. This is not essential but makes it easier
to see if the compiler and linker output files are being correctly
generated.
5. Launch Codewarrior, close any open projects and drag in the file
…\lin08\sample\ide\temp08\slave.mcp.
6. Remove slave.c from the project by selecting the file (in files folder) and
deleting it using the “Edit” pull-down menu.
7. Add the required source file(s) to the project by selecting “Add Files”
from the “project” pull-down menu. Browse for the file(s), select and click
on “add”. In this application the single file
…\lin08\sample\temp08\tempaz was required. If the added file appears
in an inappropriate position in the list of project files it can be dragged to
a more suitable place.
8. Use the LIN slave settings (leftmost) icon to select “target – access
paths”. Remove path (Project)..\..\slave to ensure that it isn’t
inadvertently accessed. The path (Project)..\..\temp08 is required but
should already have been added automatically.
9. If any include files are required they should be added to folder
…\lin08\inc. In this application, the file hc08az60.h (see appendix II) was
added. Include files can optionally be added to the project as described
above for source files.
10. The LIN driver’s .prm file hc08az32.prm will have been copied to
…\lin08\sample\ide\temp08\hc08AZ32.prm. and this file should be
inspected and edited or replaced as necessary. In this application, no
modification was necessary.
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Appendix I — LIN driver project set-up
11. In cloned projects, compiler macros set up to use slave.cfg in place of
lincfg.h and slave.id in place of linmsgid.h (see reference [2]). slave.cfg
and slave.id will have been copied into …\lin08\sample\temp08 and
should be inspected and edited if changes are required. In this
application slave.id was modified to specify the appropriate IDs and
slave.cfg was modified to enter the appropriate values for the baud rate
(0x30) and the bus timeout (400). slave.cfg and slave.id are shown in
appendix II.
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12. Many files within the project, for instance the output files slave.abs and
slave.sx will have retained their original “slave” names. The simplest
option is to retain these names as they are but they can be changed if
desired. Slave.sx is the S19 record file required to program the flash of
an MC68HC908AZ60A.
13. Close Codewarrior. When relaunched, the newly created project will be
available for simulation and/or dubugging under “open recent” in the file
pull-down menu.
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Appendix IIa — Include file (register definitions for the 908AZ60A).
/*****************************************************
HC08AZ60.H
Register definitions for the MC68HC908AZ60(A)
P. Topping
1-06-01
*****************************************************/
#define
#define
#define
#define
#define
#define
#define
#define
PTA
PTB
PTC
PTD
PTE
PTF
PTG
PTH
#define
#define
#define
#define
#define
#define
#define
#define
DDRA
DDRB
DDRC
DDRD
DDRE
DDRF
DDRG
DDRH
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
unsigned
unsigned
unsigned
unsigned
unsigned
unsigned
unsigned
unsigned
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
char
char
char
char
char
char
char
char
unsigned
unsigned
unsigned
unsigned
unsigned
unsigned
unsigned
unsigned
*)0x0000)
*)0x0001)
*)0x0002)
*)0x0003)
*)0x0008)
*)0x0009)
*)0x000A)
*)0x000B)
char
char
char
char
char
char
char
char
*)0x0004)
*)0x0005)
*)0x0006)
*)0x0007)
*)0x000C)
*)0x000D)
*)0x000E)
*)0x000F)
#define CONFIG1 *((volatile unsigned char *)0x001F)
#define CONFIG2 *((volatile unsigned char *)0xFE09)
#define
#define
#define
#define
#define
PITSC
PCNTH
PCNTL
PMODH
PMODL
*((volatile
*((volatile
*((volatile
*((volatile
*((volatile
unsigned
unsigned
unsigned
unsigned
unsigned
char
char
char
char
char
*)0x004B)
*)0x004C)
*)0x004D)
*)0x004E)
*)0x004F)
#define VECTF (void(*const)()) /* Vector table function specifier */
16
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Appendix IIb — slave.cfg (LIN configuration file).
Appendix IIb — slave.cfg (LIN configuration file).
#ifndef LINCFG_H
#define LINCFG_H
/******************************************************************************
*
*
Copyright (C) 2001 Motorola, Inc.
*
All Rights Reserved
*
*
The code is the property of Motorola GSG St.Petersburg
*
Software Development
*
and is Motorola Confidential Proprietary Information.
*
*
The copyright notice above does not evidence any
*
actual or intended publication of such source code.
*
* Filename:
$Source: /net/sdt/vault-rte/cvsroot/lin/release/hc08/sample/slave/slave.cfg,v $
* Author:
$Author: kam $
* Locker:
$Locker: $
* State:
$State: Exp $
* Revision:
$Revision: 1.12 $
*
* Functions:
LIN Driver static configuration file for LIN08 Slave sample
*
with Motorola API
*
* History:
Use the CVS command log to display revision history
*
information.
*
* Description:
It is allowed to modify by the user.
*
* Notes:
*
******************************************************************************/
#if defined (HC08)
/* External MCU frequency = 16MHz
/* SCI Baud rate
= 15.6K
*/
*/
/*
This definition configures the LIN bus baud rate.
This value shall be set according to target MCU
SCI register usage.
HC08AZ32: the 8-bit value will be masked by 0x37
and put into SCBR register.
*/
#define LIN_BAUDRATE
0x30u
/*
This definition set the number of user-defined time clocks
(LIN_IdleClock service calls), recognized as "no-bus-activity"
condition.
T|his number shall not be greater than 0xFFFF.
*/
#define LIN_IDLETIMEOUT
400u
#endif /* defined (HC08) */
#endif /* !define (LINCFG_H) */
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Appendix IIc — slave.id (LIN message ID file).
#ifndef LINMSGID_H
#define LINMSGID_H
/******************************************************************************
*
*
Copyright (C) 2001 Motorola, Inc.
*
All Rights Reserved
*
*
The code is the property of Motorola GSG St.Petersburg
*
Software Development
*
and is Motorola Confidential Proprietary Information.
*
*
The copyright notice above does not evidence any
*
actual or intended publication of such source code.
*
* Filename:
$Source: /net/sdt/vault-rte/cvsroot/lin/release/hc08/sample/slave/slave.id,v $
* Author:
$Author: snl $
* Locker:
$Locker: $
* State:
$State: Exp $
* Revision:
$Revision: 1.8 $
*
* Functions:
Message Identifier configuration for LIN08 Slave sample
*
with Motorola API
*
* History:
Use the CVS command log to display revision history
*
information.
*
* Description:
*
* Notes:
*
******************************************************************************/
#define
#define
#define
#define
LIN_MSG_09
LIN_MSG_0A
LIN_MSG_21
LIN_MSG_20
LIN_RECEIVE
LIN_RECEIVE
LIN_RECEIVE
LIN_SEND
/* this
#define
#define
#define
#define
string is not necessary - just as an example */
LIN_MSG_20_LEN
4
/* standard length */
LIN_MSG_09_LEN
2
/* standard length */
LIN_MSG_0A_LEN
2
/* standard length */
LIN_MSG_21_LEN 4
/* standard length */
#endif /* defined(LINMSGID_H)*/
18
LIN Node Temperature Display
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AN2264/D
Appendix IIc — slave.id (LIN message ID file).
This Page Has Been Intentionally Left Blank
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AN2264/D
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