File content as of revision 2:6d0f581488b6:

// Set error string based on error number for
// convinience debugging purpose.
// See: API Reference>S110>SofDevice Global Error Codes
#include <stdint.h>
#include <stdio.h>

#include "nRF51822n.h"

#define MAX_BUFFER 100
char m_error_string[MAX_BUFFER];
char m_event_string[MAX_BUFFER];
char m_nrfevent_string[MAX_BUFFER];
char m_ancs_string[MAX_BUFFER];


char *get_error_unknown(uint32_t error_num) {
    snprintf(m_error_string, MAX_BUFFER, "Unknown");
    return m_error_string;
}

// Global error base.
char *get_error_global(uint32_t error_num) {
    if(error_num == NRF_ERROR_BASE_NUM + 0){
        snprintf(m_error_string, MAX_BUFFER, "Successful command. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 1){
        snprintf(m_error_string, MAX_BUFFER, "SVC handler is missing. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 2){
        snprintf(m_error_string, MAX_BUFFER, "SoftDevice has not been enabled. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 3){
        snprintf(m_error_string, MAX_BUFFER, "Internal Error. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 4){
        snprintf(m_error_string, MAX_BUFFER, "No Memory for operation. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 5){
        snprintf(m_error_string, MAX_BUFFER, "Not found. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 6){
        snprintf(m_error_string, MAX_BUFFER, "Not supported. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 7){
        snprintf(m_error_string, MAX_BUFFER, "Invalid Parameter. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 8){
        snprintf(m_error_string, MAX_BUFFER, "Invalid state, operation disallowed in this state. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 9){
        snprintf(m_error_string, MAX_BUFFER, "Invalid Length. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 10){
        snprintf(m_error_string, MAX_BUFFER, "Invalid Flags. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 11){
        snprintf(m_error_string, MAX_BUFFER, "Invalid Data. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 12){
        snprintf(m_error_string, MAX_BUFFER, "Data size exceeds limit. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 13){
        snprintf(m_error_string, MAX_BUFFER, "Operation timed out. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 14){
        snprintf(m_error_string, MAX_BUFFER, "Null Pointer. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 15){
        snprintf(m_error_string, MAX_BUFFER, "Forbidden Operation. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 16){
        snprintf(m_error_string, MAX_BUFFER, "Bad Memory Address. ");
    } else if(error_num == NRF_ERROR_BASE_NUM + 17){
        snprintf(m_error_string, MAX_BUFFER, "Busy. ");        
    } else {
        return get_error_unknown(error_num);
    }
    return m_error_string;
}

// SDM error base.
char *get_error_sdm(uint32_t error_num) {
    if(error_num == NRF_ERROR_SDM_BASE_NUM + 0){
        snprintf(m_error_string, MAX_BUFFER, "Unknown lfclk source. ");
    } else if(error_num == NRF_ERROR_SDM_BASE_NUM + 1){
        snprintf(m_error_string, MAX_BUFFER, "Incorrect interrupt configuration (can be caused by using illegal priority levels, or having enabled SoftDevice interrupts) ");
    } else if(error_num == NRF_ERROR_SDM_BASE_NUM + 2){
        snprintf(m_error_string, MAX_BUFFER, "Incorrect CLENR0 (can be caused by erronous SoftDevice flashing) ");
    } else {
        return get_error_unknown(error_num);
    }    
    return m_error_string;
}

// SoC error base.
char *get_error_soc(uint32_t error_num) {
    if(error_num == NRF_ERROR_SOC_BASE_NUM + 0){
        snprintf(m_error_string, MAX_BUFFER, "Mutex already taken. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 1){
        snprintf(m_error_string, MAX_BUFFER, "NVIC interrupt not available. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 2){
        snprintf(m_error_string, MAX_BUFFER, "NVIC interrupt priority not allowed. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 3){
        snprintf(m_error_string, MAX_BUFFER, "NVIC should not return. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 4){
        snprintf(m_error_string, MAX_BUFFER, "Power mode unknown. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 5){
        snprintf(m_error_string, MAX_BUFFER, "Power POF threshold unknown. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 6){
        snprintf(m_error_string, MAX_BUFFER, "Power off should not return. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 7){
        snprintf(m_error_string, MAX_BUFFER, "RAND not enough values. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 8){
        snprintf(m_error_string, MAX_BUFFER, "Invalid PPI Channel. ");        
    } else if(error_num == NRF_ERROR_SOC_BASE_NUM + 9){
        snprintf(m_error_string, MAX_BUFFER, "Invalid PPI Group. ");        
    } else {
        return get_error_unknown(error_num);
    }
    return m_error_string;
}

// STK error base.
char *get_error_stk(uint32_t error_num) {
    snprintf(m_error_string, MAX_BUFFER, "stk error.");
    return m_error_string;
}

char *error2string(uint32_t error_num) {
    
    if(error_num<NRF_ERROR_SDM_BASE_NUM) {
        return get_error_global(error_num);
    } else if(error_num<NRF_ERROR_SDM_BASE_NUM) {
        return get_error_sdm(error_num);
    } else if(error_num<NRF_ERROR_SOC_BASE_NUM) {
        return get_error_soc(error_num);
    } else if(error_num<NRF_ERROR_STK_BASE_NUM) {
        return get_error_stk(error_num);
    } else {
        return get_error_unknown(error_num);
    }
     
}

char *event2string(ble_evt_t * p_ble_evt) {
    switch (p_ble_evt->header.evt_id) { 
        // GAP
        case BLE_GAP_EVT_CONNECTED:
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_CONNECTED", "Connection established.");
            break;
        case BLE_GAP_EVT_DISCONNECTED :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_DISCONNECTED ", "Disconnected from peer.");
            break;
        case BLE_GAP_EVT_CONN_PARAM_UPDATE:
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_CONN_PARAM_UPDATE", "Connection Parameters updated.");
            break;
        case BLE_GAP_EVT_SEC_PARAMS_REQUEST :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_SEC_PARAMS_REQUEST ", "Request to provide security parameters.");
            break;
        case BLE_GAP_EVT_SEC_INFO_REQUEST :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_SEC_INFO_REQUEST ", "Request to provide security information.");
            break;
        case BLE_GAP_EVT_PASSKEY_DISPLAY:
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_PASSKEY_DISPLAY", "Request to display a passkey to the user.");
            break;
        case BLE_GAP_EVT_AUTH_KEY_REQUEST:
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_AUTH_KEY_REQUEST", "Request to provide an authentication key.");
            break;
        case BLE_GAP_EVT_AUTH_STATUS :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_AUTH_STATUS ", "Authentication procedure completed with status.");
            break;
        case BLE_GAP_EVT_CONN_SEC_UPDATE:
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_CONN_SEC_UPDATE ", "Connection security updated.");
            break;
        case BLE_GAP_EVT_TIMEOUT :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_TIMEOUT ", "Timeout expired.");
            break;
        case BLE_GAP_EVT_RSSI_CHANGED :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GAP_EVT_RSSI_CHANGED ", "Signal strength measurement report.");
            break;
        // GATTC
        case BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP ", "Primary Service Discovery Response event.");
            break;
        case BLE_GATTC_EVT_REL_DISC_RSP  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_REL_DISC_RSP ", "Relationship Discovery Response event.");
            break;
        case BLE_GATTC_EVT_CHAR_DISC_RSP  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_CHAR_DISC_RSP ", "Characteristic Discovery Response event.");
            break;
        case BLE_GATTC_EVT_DESC_DISC_RSP  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_DESC_DISC_RSP ", "Descriptor Discovery Response event.");
            break;
        case BLE_GATTC_EVT_CHAR_VAL_BY_UUID_READ_RSP :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_CHAR_VAL_BY_UUID_READ_RSP", "Read By UUID Response event.");
            break;
        case BLE_GATTC_EVT_READ_RSP  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_READ_RSP ", "Read Response event.");
            break;
        case BLE_GATTC_EVT_CHAR_VALS_READ_RSP  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_CHAR_VALS_READ_RSP ", "Read multiple Response event.");
            break;
        case BLE_GATTC_EVT_WRITE_RSP  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_WRITE_RSP", "Write Response event.");
            break;
        case BLE_GATTC_EVT_HVX  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_HVX ", "Handle Value Notification or Indication event.");
            break;
        case BLE_GATTC_EVT_TIMEOUT  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTC_EVT_TIMEOUT ", "Timeout event.");
            break;
        // GATTS
        case BLE_GATTS_EVT_WRITE  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTS_EVT_WRITE ", "Write operation performed.");
            break;
        case BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST ", "Read/Write Authorization request.");
            break;
        case BLE_GATTS_EVT_SYS_ATTR_MISSING  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTS_EVT_SYS_ATTR_MISSING ", "A persistent system attribute access is pending, awaiting a sd_ble_gatts_sys_attr_set().");
            break;
        case BLE_GATTS_EVT_HVC  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTS_EVT_HVC ", "Handle Value Confirmation.");
            break;
        case BLE_GATTS_EVT_SC_CONFIRM  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTS_EVT_SC_CONFIRM ", "Service Changed Confirmation.");
            break;
        case BLE_GATTS_EVT_TIMEOUT  :
            snprintf(m_event_string, MAX_BUFFER, "%s (%s)", "BLE_GATTS_EVT_TIMEOUT ", "Timeout.");
            break;
        //
        default:
            snprintf(m_event_string, MAX_BUFFER, "Event: Unknown (%d)", p_ble_evt->header.evt_id);
            break;
    }        

    return m_event_string;    
}


char *nrfevent2string(uint32_t evt_id) {
    switch (evt_id) { 
//        case NRF_EVT_HFCLKSTARTED   :
//            snprintf(m_nrfevent_string, MAX_BUFFER, "%s (%s)", "NRF_EVT_HFCLKSTARTED", "Event indicating that the HFCLK has started.");
//            break;
//        case NRF_EVT_POWER_FAILURE_WARNING   :
//            snprintf(m_nrfevent_string, MAX_BUFFER, "%s (%s)", "NRF_EVT_POWER_FAILURE_WARNING", "Event indicating that a power failure warning has occurred.");
//            break;
//        case NRF_EVT_FLASH_OPERATION_SUCCESS   :
//            snprintf(m_nrfevent_string, MAX_BUFFER, "%s (%s)", "NRF_EVT_FLASH_OPERATION_SUCCESS", "Event indicating that the ongoing flash operation has completed successfully.");
//            break;
//        case NRF_EVT_FLASH_OPERATION_ERROR  :
//            snprintf(m_nrfevent_string, MAX_BUFFER, "%s (%s)", "NRF_EVT_FLASH_OPERATION_ERROR", "Event indicating that the ongoing flash operation has timed out with an error.");
//            break;
//        case NRF_EVT_HFCLKSTARTED   :
//            snprintf(m_nrfevent_string, MAX_BUFFER, "%s (%s)", "NRF_EVT_HFCLKSTARTED ", "Event indicating that the HFCLK has started.");
//            break;
//        case NRF_EVT_POWER_FAILURE_WARNING  :
//            snprintf(m_nrfevent_string, MAX_BUFFER, "%s (%s)", "NRF_EVT_POWER_FAILURE_WARNING", "Event indicating that a power failure warning has occurred.");
//            break;
//        case NRF_EVT_FLASH_OPERATION_SUCCESS  :
//            snprintf(m_nrfevent_string, MAX_BUFFER, "%s (%s)", "NRF_EVT_FLASH_OPERATION_SUCCESS", "Event indicating that the ongoing flash operation has completed successfully.");
//            break;
//        case NRF_EVT_FLASH_OPERATION_ERROR   :
//            snprintf(m_nrfevent_string, MAX_BUFFER, "%s (%s)", "NRF_EVT_FLASH_OPERATION_ERROR ", "Event indicating that the ongoing flash operation has timed out with an error.");
//            break;
        default:
            snprintf(m_nrfevent_string, MAX_BUFFER, "Event: Unknown (%d)", evt_id);
            break;
    }        

    return m_nrfevent_string;
}

char *eventid2string(uint8_t d) {
    switch (d) {   
        case 0 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Notification Added");
            break;
        case 1 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Notification Modified");
            break;
        case 2 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Notification Removed");
            break;            
        default:
            snprintf(m_ancs_string, MAX_BUFFER, "Reserved (%d)", d);
            break;
    }        

    return m_ancs_string;
}

char *eventflags2string(uint8_t d) {
    snprintf(m_ancs_string, MAX_BUFFER, "(no flags)");
    if(d & 3) {
        snprintf(m_ancs_string, MAX_BUFFER, "%s", "Silent & Important");
    } else if(d & 1) {
        snprintf(m_ancs_string, MAX_BUFFER, "%s", "Silent");
    } else if(d & 2) {
        snprintf(m_ancs_string, MAX_BUFFER, "%s", "Important");
    }

    return m_ancs_string;
}

char *categoryid2string(uint8_t d) {
    switch (d) {   
        case 0 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Other");
            break;
        case 1 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Incomming Call");
            break;
        case 2 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Missed Call");
            break;            
        case 3 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Voice Mail");
            break;
        case 4 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Social");
            break;
        case 5 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Schedule");
            break;            
        case 6 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Email");
            break;
        case 7 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "News");
            break;
        case 8 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Health And Fitness");
            break;            
        case 9 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Business And Finance");
            break;
        case 10 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Location"); // iBeacon?
            break;
        case 11 :
            snprintf(m_ancs_string, MAX_BUFFER, "%s", "Entertainment");
            break;            
        default:
            snprintf(m_ancs_string, MAX_BUFFER, "Reserved (%d)", d);
            break;
    }        

    return m_ancs_string;
}