Renesas MN4 Spécifications télécharger pdf (Page 7)

V850E2/MN4 UARTJ Control

R01AN0926EJ0100 Rev.1.00 Page 7 of 30

Feb 07, 2012

4. Sample Application

This section explains how to set up the UARTJ functions.

4.1 Flow Charts

The flow charts of this sample program are given below.

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 transmission/reception and

awaits the end of FIFO transmission/reception.

START

Start program

Disable maskable interrupts

Enable maskable interrupts

FLAGS CLEAR

Clear user flag in internal RAM,

indicating end of transmission/

reception

InitializationMain loop

Initialize ports

PORT INITIAL

Initialize UARTJ1 transmission and

enable transmit interrupts

TRANSMIT INITIAL

Initialize UARTJ3 reception and

enable receive interrupts

RECEIVE INITIAL

YES

Start communication

TRANSMIT START

APPLICATION INITIAL

Initialize variables

OVER?

Await end of transmission/reception

SYSTEM INITIAL

Initialize system

Figure 4.1 Main Processing Flowchart

1 2 3 4 5 6 7 8 9 10 11 12 ... 32 33

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Renesas MN4 Spécifications Page 7