added gap_update_connection_parameters

.gitignore

@@ -4,4 +4,53 @@
 *.*~
 .netrc
 
-include/btstack/version.h
+include/btstack/version.h
+
+.classpath
+.project
+.settings/
+AndroidManifest.xml
+CocoaTouch/
+MSP-EXP430F5438-CC256x/
+Makefile
+Makefile.am
+Makefile.in
+Ports/
+aclocal.m4
+autom4te.cache/
+ble/
+bootstrap.sh
+btstack-config.h
+chipset-cc256x/
+chipset-csr/
+config-iphone.sh
+config.guess
+config.status
+config.sub
+config/
+configure
+configure.ac
+docs/
+eZ430-RF2560/
+example/
+gen/
+ic_launcher-web.png
+include/
+java/
+layout
+m4/
+package.sh
+platforms/
+proguard-project.txt
+project.properties
+project.xcodeproj/
+res/
+src/
+test/
+tools/
+mtk/BTstackDaemon
+mtk/BTstackDaemonRespawn
+mtk/inquiry
+mtk/le_scan
+mtk/minimal_peripheral
+mtk/rfcomm-echo

ble/gap_le.h

@@ -41,6 +41,8 @@
 extern "C" {
 #endif
 
+#include <btstack/utils.h>
+
 typedef enum {
     GAP_RANDOM_ADDRESS_TYPE_OFF = 0,
     GAP_RANDOM_ADDRESS_NON_RESOLVABLE,
@@ -59,6 +61,18 @@ void gap_random_address_set_mode(gap_random_address_type_t random_address_type);
  */
  void gap_random_address_set_update_period(int period_ms);
 
+/**
+ * @brief Updates the connection parameters for a given LE connection
+ * @param handle
+ * @param conn_interval_min (unit: 1.25ms)
+ * @param conn_interval_max (unit: 1.25ms)
+ * @param conn_latency
+ * @param supervision_timeout (unit: 10ms)
+ * @returns 0 if ok
+ */
+void gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min,
+	uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout);
+
 #if defined __cplusplus
 }
 #endif

src/hci.c

@@ -1839,6 +1839,15 @@ void hci_run(){
             hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1);
             return;
         }
+#ifdef HAVE_BLE
+        if (connection->le_conn_interval_min){
+            uint16_t connection_interval_min = connection->le_conn_interval_min;
+            connection->le_conn_interval_min = 0;
+            hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min,
+                connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout,
+                0x0000, 0xffff);
+        }
+#endif
     }
 
     switch (hci_stack->state){
@@ -2466,6 +2475,26 @@ le_command_status_t le_central_connect_cancel(){
     return BLE_PERIPHERAL_OK;
 }
 
+/**
+ * @brief Updates the connection parameters for a given LE connection
+ * @param handle
+ * @param conn_interval_min (unit: 1.25ms)
+ * @param conn_interval_max (unit: 1.25ms)
+ * @param conn_latency
+ * @param supervision_timeout (unit: 10ms)
+ * @returns 0 if ok
+ */
+int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min,
+    uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){
+    hci_connection_t * connection = hci_connection_for_handle(con_handle);
+    if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER;
+    connection->le_conn_interval_min = conn_interval_min;
+    connection->le_conn_interval_max = conn_interval_max;
+    connection->le_conn_latency = conn_latency;
+    connection->le_supervision_timeout = supervision_timeout;
+    return 0;
+}
+
 le_command_status_t gap_disconnect(hci_con_handle_t handle){
     hci_connection_t * conn = hci_connection_for_handle(handle);
     if (!conn){

src/hci.h

@@ -343,6 +343,12 @@ typedef struct {
     
     // number ACL packets sent to controller
     uint8_t num_acl_packets_sent;
+
+    // connection parameter update
+    uint16_t le_conn_interval_min;
+    uint16_t le_conn_interval_max;
+    uint16_t le_conn_latency;
+    uint16_t le_supervision_timeout;
 } hci_connection_t;