Specifications

October 25, 2006 Cypress Semiconductor – Rev. ** 43
5. Demonstration Projects
5.1 Introduction
The LIN reference design board comes with three PsoC
devices:
■ Master
■ Slave 1
■ Slave 2
The master and slave 1 are implemented with 28-pin
CY8C27443-PXI devices and slave 2 is implemented with
an 8-pin CY8C27143-PXI device.
Note that the CD-ROM that is included with this design has
all project files for the designed-in devices as well as project
files for automotive grade devices.
Periodically, the master node sends its switch state informa-
tion to slave 1 and then polls both slaves for their switch
state information. In response, the master and slaves dis-
play the state of the information as specified by the switch-
to-display relationship. When the master sends its switch
status to slave 1, slave 1 updates its LEDs with this informa-
tion. The master updates LED 1 to LED 4 with the switch
status of SW8-SW5 of slave 1. The master updates LEDs 5
and 6 with switch status of SW1 and SW2 of slave 2. Also,
the master transmits the status of SW2 and SW1 of slave 1
to slave 2 so that slave 2 can control LEDs 1 and 2.
5.2 LIN Description File (LDF)
5.2.1 Description
1. The LIN version is 2.0 and the baud rate is 19.2 kbps.
2. The Nodes section describes the names of the master
and the nodes present in the network. Master is named
as CEM. Slave 1 is named as CPM and slave 2 as DIA.
3. The Signals section describes the name of each signal,
its length in bits, the publishing node and the subscribing
node(s).
4. The Dynamic Frames section describes each frame that
is transmitted in the network, the length of the frame, the
signals that the frame carries and the offset of each sig-
nal in this frame. The frames used in the network are
VL1_CE1_Frm1 (carries the switch status of the mas-
ter), VL1_CEM_Frm2 (carries information of SW1 and
SW2 status of slave 1 for slave 2 to control the blinking
LEDs), VL1_CPM_Frm1 (carries the resistance informa-
tion from slave 1 and the Response_Error bit),
VL1_CPM_Frm2 (carries switch status of slave 1), and
VL1_DIA_Frm1 (carries switch status of slave 2).
5. The Node Attributes section describes the slaves
present in the network. Details including LIN version,
NAD, product ID, etc. are described here.
6. The Schedule Table section defines the schedules that
will be executed in the network. The Schedule table in
the master project will be based on this information.