Mikroelektronika MIKROE-350 データシート

473

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

sub procedure UARTx_Read_Text(dim byref Output as string[255],
dim byref Delimiter as string[10], dim Attempts as byte)

Nothing.

Reads characters received via UART until the delimiter sequence is detected.
The read sequence is stored in the parameter 

output

; delimiter sequence is

stored in the parameter 

delimiter

.

This is a blocking call: the delimiter sequence is expected, otherwise the proce-
dure exits( if the delimiter is not found). Attempts defines number of received
characters in which Delimiter sequence is expected. If Attempts is set to 255,
this routine will continously try to detect the Delimiter sequence.

UART HW module must be initialized and communication established before
using this function. See UARTx_Init.

Read text until the sequence “OK” is received, and send back what’s been received:

UART1_Init(4800)                           ' initialize UART

module
Delay_ms(100)

while TRUE

if (UART1_Data_Ready() = 1)        ' if data is received   

UART1_Read_Text(output, 'delim', 10)  ' reads text until

'delim' is found

UART1_Write_Text(output)              ' sends back text