Diff: spp_flowcontrol.cpp

Revision:

0:1ed23ab1345f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spp_flowcontrol.cpp	Tue Jun 26 14:27:45 2012 +0000
@@ -0,0 +1,178 @@
+#if 0
+//*****************************************************************************
+//
+// spp_counter demo - it provides a SPP and sends a counter every second
+//
+// it doesn't use the LCD to get down to a minimal memory footpring
+//
+//*****************************************************************************
+#include "mbed.h"
+#include <btstack/hci_cmds.h>
+#include <btstack/run_loop.h>
+#include <btstack/sdp_util.h>
+#include "hci.h"
+#include "l2cap.h"
+#include "btstack_memory.h"
+#include "remote_device_db.h"
+#include "rfcomm.h"
+#include "sdp.h"
+#include "config.h"
+#include "debug.h"
+#include "bd_addr.h"  // class bd_addr
+
+Serial pc(USBTX, USBRX);
+DigitalOut led1(LED1), led2(LED2);
+
+#define HEARTBEAT_PERIOD_MS 500
+
+static uint8_t   rfcomm_channel_nr = 1;
+static uint16_t  rfcomm_channel_id = 0;
+static uint8_t   rfcomm_send_credit = 0;
+static uint8_t   spp_service_buffer[128];
+
+// Bluetooth logic
+static void packet_handler (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
+    bd_addr_t event_addr;
+    uint8_t   rfcomm_channel_nr;
+    uint16_t  mtu;
+    
+    switch (packet_type) {
+        case HCI_EVENT_PACKET:
+            switch (packet[0]) {
+                    
+                case BTSTACK_EVENT_STATE:
+                    // bt stack activated, get started - set local name
+                    if (packet[2] == HCI_STATE_WORKING) {
+                        hci_send_cmd(&hci_write_local_name, "mbed-Demo");
+                    }
+                    break;
+                
+                case HCI_EVENT_COMMAND_COMPLETE:
+                    if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)){
+                        bt_flip_addr(event_addr, &packet[6]);
+                        log_info("BD-ADDR: %s\n\r", bd_addr_to_str(event_addr));
+                        break;
+                    }
+                    if (COMMAND_COMPLETE_EVENT(packet, hci_write_local_name)){
+                        hci_discoverable_control(1);
+                        break;
+                    }
+                    break;
+
+                case HCI_EVENT_LINK_KEY_REQUEST:
+                    // deny link key request
+                    log_info("Link key request\n\r");
+                    bt_flip_addr(event_addr, &packet[2]);
+                    hci_send_cmd(&hci_link_key_request_negative_reply, &event_addr);
+                    break;
+                    
+                case HCI_EVENT_PIN_CODE_REQUEST:
+                    // inform about pin code request
+                    log_info("Pin code request - using '0000'\n\r");
+                    bt_flip_addr(event_addr, &packet[2]);
+                    hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000");
+                    break;
+                
+                case RFCOMM_EVENT_INCOMING_CONNECTION:
+                    // data: event (8), len(8), address(48), channel (8), rfcomm_cid (16)
+                    bt_flip_addr(event_addr, &packet[2]); 
+                    rfcomm_channel_nr = packet[8];
+                    rfcomm_channel_id = READ_BT_16(packet, 9);
+                    log_info("RFCOMM channel %u requested for %s\n\r", rfcomm_channel_nr, bd_addr_to_str(event_addr));
+                    rfcomm_accept_connection_internal(rfcomm_channel_id);
+                    break;
+                    
+                case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE:
+                    // data: event(8), len(8), status (8), address (48), server channel(8), rfcomm_cid(16), max frame size(16)
+                    if (packet[2]) {
+                        log_info("RFCOMM channel open failed, status %u\n\r", packet[2]);
+                    } else {
+                        rfcomm_channel_id = READ_BT_16(packet, 12);
+                        mtu = READ_BT_16(packet, 14);
+                        log_info("\n\rRFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n\r", rfcomm_channel_id, mtu);
+                    }
+                    break;
+                    
+                case RFCOMM_EVENT_CHANNEL_CLOSED:
+                    rfcomm_channel_id = 0;
+                    break;
+                
+                default:
+                    break;
+            }
+            break;
+            
+        case RFCOMM_DATA_PACKET:
+            // hack: truncate data (we know that the packet is at least on byte bigger
+            packet[size] = 0;
+            puts( (const char *) packet);
+            rfcomm_send_credit = 1;
+        default:
+            break;
+    }
+}
+
+static void  heartbeat_handler(struct timer *ts){
+    if (rfcomm_send_credit){
+        rfcomm_grant_credits(rfcomm_channel_id, 1);
+        rfcomm_send_credit = 0;
+    }
+    run_loop_set_timer(ts, HEARTBEAT_PERIOD_MS);
+    run_loop_add_timer(ts);
+    led2 = !led2;
+} 
+
+// main
+int main(void)
+{
+    pc.baud(921600);
+    log_info("%s\n", __FILE__);
+
+    // init LEDs
+    led1 = led2 = 1;
+    
+    /// GET STARTED with BTstack ///
+    btstack_memory_init();
+    run_loop_init(RUN_LOOP_EMBEDDED);
+    
+    // init HCI
+    hci_transport_t* transport = hci_transport_usb_instance();
+    remote_device_db_t * remote_db = (remote_device_db_t *) &remote_device_db_memory;
+    hci_init(transport, NULL, NULL, remote_db);
+    
+    // init L2CAP
+    l2cap_init();
+    l2cap_register_packet_handler(packet_handler);
+    
+    // init RFCOMM
+    rfcomm_init();
+    rfcomm_register_packet_handler(packet_handler);
+    rfcomm_register_service_with_initial_credits_internal(NULL, rfcomm_channel_nr, 100, 1);  // reserved channel, mtu=100, 1 credit
+
+    // init SDP, create record for SPP and register with SDP
+    sdp_init();
+    memset(spp_service_buffer, 0, sizeof(spp_service_buffer));
+    service_record_item_t * service_record_item = (service_record_item_t *) spp_service_buffer;
+    sdp_create_spp_service( (uint8_t*) &service_record_item->service_record, 1, "SPP Counter");
+    log_info("SDP service buffer size: %u\n\r", (uint16_t) (sizeof(service_record_item_t) + de_get_len((uint8_t*) &service_record_item->service_record)));
+    sdp_register_service_internal(NULL, service_record_item);
+    
+    // set one-shot timer
+    timer_source_t heartbeat;
+    heartbeat.process = &heartbeat_handler;
+    run_loop_set_timer(&heartbeat, HEARTBEAT_PERIOD_MS);
+    run_loop_add_timer(&heartbeat);
+    
+    
+    log_info("SPP FlowControl Demo: simulates processing on received data...\n\r");
+
+     // turn on!
+    hci_power_control(HCI_POWER_ON);
+
+    // go!
+    run_loop_execute();    
+    
+    // happy compiler!
+    return 0;
+}
+#endif