Cypress EZ-BT WICED CYBT-343026-01, Начало работы

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Getting Started with EZ-BT WICED Modules
www.cypress.com
Document Number: 002-23400 Rev. ** 37
Code 24. BLE GATT Write Request
wiced_bt_gatt_status_t hello_sensor_gatts_req_write_handler ( uint16_t conn_id, wiced_bt_gatt_write_t *
p_data )
{
wiced_bt_gatt_status_t result = WICED_BT_GATT_SUCCESS ;
uint8_t *p_attr = p_data-> p_val ;
uint8_t nv_update = WICED_FALSE;
WICED_BT_TRACE(
"write_handler: conn_id:%d hdl:0x%x prep:%d offset:%d len:%d\n " , conn_id, p_data-
> handle , p_data-> is_prep , p_data-> offset , p_data-> val_len );
switch ( p_data-> handle )
{
/* By writing into Characteristic Client Configuration descriptor
* peer can enable or disable notification or indication */
case HANDLE_HSENS_SERVICE_CHAR_CFG_DESC:
if ( p_data-> val_len != 2 )
{
return WICED_BT_GATT_INVALID_ATTR_LEN ;
}
hello_sensor_hostinfo.
characteristic_client_configuration = p_attr[0] | ( p_attr[1] << 8 );
nv_update = WICED_TRUE;
break ;
case HANDLE_HSENS_SERVICE_CHAR_BLINK_VAL:
if ( p_data-> val_len != 1 )
{
return WICED_BT_GATT_INVALID_ATTR_LEN ;
}
hello_sensor_hostinfo.
number_of_blinks = p_attr[0];
if ( hello_sensor_hostinfo. number_of_blinks != 0 )
{
WICED_BT_TRACE(
"hello_sensor_write_handler:num blinks: %d\n" ,
hello_sensor_hostinfo. number_of_blinks );
wiced_bt_app_hal_led_blink( WICED_PLATFORM_LED_1 , 250, 250,
hello_sensor_hostinfo. number_of_blinks );
nv_update = WICED_TRUE;
}
break ;
default :
result = WICED_BT_GATT_INVALID_HANDLE ;
break ;
}
if ( nv_update )
{
wiced_result_t rc;
int bytes_written = wiced_hal_write_nvram( HELLO_SENSOR_VS_ID, sizeof (hello_sensor_hostinfo),
( uint8_t *)&hello_sensor_hostinfo, &rc );
WICED_BT_TRACE( "NVRAM write:%d rc:%d" , bytes_written, rc);
}
return result;
}
7.4.3.3 Indication Confirmation
If the Client chooses indications instead of notifications, which is determined by the Client configuration data received
as part of the GATT write request from the Client shown in
Code 24 , the Peripheral should wait for confirmation before
sending the next indication.
Code 25. BLE Indication Confirmation
wiced_bt_gatt_status_t hello_sensor_gatts_req_conf_handler ( uint16_t conn_id, uint16_t handle )
{
WICED_BT_TRACE(
"hello_sensor_indication_cfm, conn %d hdl %d\n" , conn_id, handle );
if ( !hello_sensor_state. flag_indication_sent )
{
WICED_BT_TRACE(
"Hello: Wrong Confirmation!" );
return WICED_BT_GATT_SUCCESS ;
}