Fix #416: add lmic_tx_error_t

Author: terrillmoore

src/lmic/lmic.c

@@ -2736,7 +2736,7 @@ void LMIC_setTxData (void) {
 
 
 // send a message w/o callback
-int LMIC_setTxData2 (u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed) {
+lmic_tx_error_t LMIC_setTxData2 (u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed) {
     if ( LMIC.opmode & OP_TXDATA ) {
         // already have a message queued
         return LMIC_ERROR_TX_BUSY;
@@ -2761,11 +2761,11 @@ int LMIC_setTxData2 (u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed) {
 }
 
 // send a message with callback
-int LMIC_sendWithCallback(
+lmic_tx_error_t LMIC_sendWithCallback (
     u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed,
     lmic_txmessage_cb_t *pCb, void *pUserData
 ) {
-    int const result = LMIC_setTxData2(port, data, dlen, confirmed);
+    lmic_tx_error_t const result = LMIC_setTxData2(port, data, dlen, confirmed);
     if (result == 0) {
         LMIC.client.txMessageCb = pCb;
         LMIC.client.txMessageUserData = pUserData;

src/lmic/lmic.h

@@ -291,6 +291,8 @@ enum {
     LMIC_ERROR_TX_FAILED = -4,
 };
 
+typedef int lmic_tx_error_t;
+
 #define LMIC_ERROR_NAME__INIT                                               \
     "LMIC_ERROR_SUCCESS",                                                   \
     "LMIC_ERROR_TX_BUSY",                                                   \
@@ -612,8 +614,8 @@ void  LMIC_init         (void);
 void  LMIC_reset        (void);
 void  LMIC_clrTxData    (void);
 void  LMIC_setTxData    (void);
-int   LMIC_setTxData2   (u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed);
-int   LMIC_sendWithCallback(u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed, lmic_txmessage_cb_t *pCb, void *pUserData);
+lmic_tx_error_t LMIC_setTxData2(u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed);
+lmic_tx_error_t LMIC_sendWithCallback(u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed, lmic_txmessage_cb_t *pCb, void *pUserData);
 void  LMIC_sendAlive    (void);
 
 #if !defined(DISABLE_BEACONS)