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STR71x UART COMMUNICATION WITH A PC USING RS232

3.3 SOFTWARE IMPLEMENTATION

3.3.1 Code description

The C code described below is for guidance only. The file cannot be used alone, the complete

software can be found at http://www.st.com/mcu

3.3.2 Flowchart

The flowchart of the application is presented below.

Figure 4. Transmission mode, Reception mode

BEGIN

STR71x

initialization

UART0

initialization

NB = 0

send the byte

(NB) from buffer

byte sent

NO

YES

NB = NB +1

NB = 4

NO

YES

new byte

received

NO

YES

put new byte into buffer

at address (NB)

NB = 4

NO

YES

NB = 0

NB = NB +1