Puart Programming Example - Cypress WICED CYW920706WCDEVAL Hardware User's Manual

10.5 PUART Programming Example

The following example shows how to initialize the peripheral UART. The complete working project for this example can be
found in WICED Studio under Project Explorer 20706-A2_Bluetooth\apps\snip\hal_puart. Pertinent sections of source file
hal_puart_app.c are shown here:
#include "wiced_hal_puart.h"
void puar_rx_interrupt_callback(void* unused)
{
// There can be at most 16 bytes in the HW FIFO.
uint8_t
wiced_hal_puart_read( &readbyte );
/* send one byte via the TX line. */
wiced_hal_puart_write( readbyte+1 );
if( readbyte == 'S' )
{
/* send a string of characters via the TX line */
wiced_hal_puart_print( "\nYou typed 'S'.\n" );
}
wiced_hal_puart_reset_puart_interrupt( );
}
/* Sample code to test puart driver. Initializes puart, selects puart pads,
* turn off flow control, and enables Tx and Rx.
* Echoes the input byte with increment by 1.
*/
void test_puart_driver( void )
{
uint8_t read_5_bytes[5];
wiced_hal_puart_init( );
// Possible uart tx and rx combination.
// Pin for Rx: p2, Pin for Tx: p0
// Note that p2 and p0 might not be available for use on your
// specific hardware platform.
// Please see the User Documentation to reference the valid pins.
wiced_hal_puart_select_uart_pads( WICED_PUART_RXD, WICED_PUART_TXD, 0, 0);
/* Turn off flow control */
wiced_hal_puart_flow_off( );
// BEGIN - puart interrupt
wiced_hal_puart_register_interrupt(puar_rx_interrupt_callback);
/* Turn on Tx */
wiced_hal_puart_enable_tx( ); // call wiced_hal_puart_disable_tx to disable
wiced_hal_puart_print( "Hello World!\r\nType something! Keystrokes are echoed to
the terminal ...\r\n");
/* Enable to change puart baud rate. eg: 9600, 19200, 38200 */
//wiced_hal_puart_set_baudrate( 115200 );
}
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readbyte;
// call wiced_hal_puart_flow_on(); to turn on flow
// control
// transmit capability.
Interface Programming Information and Examples
Doc. No.: 002-16535 Rev. ** 41