Specifications

V850E2/MN4 CSIH Control

R01AN0924EJ0100 Rev.1.00 Page 10 of 40

Feb 10, 2012

4. Sample Application

This section explains how to set up the CSIH functions.

4.1 Flow Charts

The flow charts of this sample program are given below. The pertinent subroutines are entered according to the

operating mode that is set up by the user.

4.1.1 Main Processing

The main processing disables maskable interrupts first. After each setup ends, the maskable interrupts and

transmit/receive status interrupts are enabled. The main loop processing repeatedly controls communication and awaits

the end of communication.

Figure 4.1 Main Processing Flowchart

START

Start program

Disable maskable interru

Initialize system

Initialize ports

Initialize variables

Initialize CSIH3 for reception

and enable receive interrupts

Initialize CSIH0 for transmission

and enable transmit interrupts

Enable maskable interrupts

Start communication

Start reception

Await end of transmission /

reception

Clear user transmit / receive end flag

SYSTEM_INITIAL

PORT_INITIAL

APPLICATION_INITIAL

RECEIVE_INITIAL

TRANSMIT_INITIAL

TRANSMIT_START

RECEIVE_START

OVER ?

FLAGS_CLEAR

YES