When compiling C++ code that includes ble_gatts.h you get errors like the following:
C:/....../nrf51822/Include/s110/nrf_svc.h:21:6: error: impossible constraint in 'asm' );
^
With C code it is fine. The error is that an enum is used rather than #define's for the SD_BLE_GATTS constants. When you change the enum to #define's it works fine.
See this question where I found the solution: stackoverflow.com/.../using-c-headers-in-c-code-in-gnu-error-including-inline-assembly-impossible
Please can you fix it? (And I guess there may be similar enum issues elsewhere.)
Here is the code that works:
/**
* @brief GATTS API SVC numbers.
*/
#define SD_BLE_GATTS_SERVICE_ADD (BLE_GATTS_SVC_BASE+0) /**< Add a service. */
#define SD_BLE_GATTS_INCLUDE_ADD (BLE_GATTS_SVC_BASE+1) /**< Add an included service. */
#define SD_BLE_GATTS_CHARACTERISTIC_ADD (BLE_GATTS_SVC_BASE+2) /**< Add a characteristic. */
#define SD_BLE_GATTS_DESCRIPTOR_ADD (BLE_GATTS_SVC_BASE+3) /**< Add a generic attribute. */
#define SD_BLE_GATTS_VALUE_SET (BLE_GATTS_SVC_BASE+4) /**< Set an attribute value. */
#define SD_BLE_GATTS_VALUE_GET (BLE_GATTS_SVC_BASE+5) /**< Get an attribute value. */
#define SD_BLE_GATTS_HVX (BLE_GATTS_SVC_BASE+6) /**< Handle Value Notification or Indication. */
#define SD_BLE_GATTS_SERVICE_CHANGED (BLE_GATTS_SVC_BASE+7) /**< Perform a Service Changed Indication to one or more peers. */
#define SD_BLE_GATTS_RW_AUTHORIZE_REPLY (BLE_GATTS_SVC_BASE+8) /**< Reply to an authorization request for a read or write operation on one or more attributes. */
#define SD_BLE_GATTS_SYS_ATTR_SET (BLE_GATTS_SVC_BASE+9) /**< Set the persistent system attributes for a connection. */
#define SD_BLE_GATTS_SYS_ATTR_GET (BLE_GATTS_SVC_BASE+10) /**< Get updated persistent system attributes after terminating a connection. */
