From dc545d65125b375e54b1a3a9b9ed3d1d6cd7381d Mon Sep 17 00:00:00 2001
From: danicampora <danicampora@gmail.com>
Date: Sun, 15 Mar 2015 20:15:14 +0100
Subject: [PATCH] cc3200: Do not reset the DTHE module before every SHA
 operation.

According to the new SDK (1.1.0) this is not needed, and it's best
not to do it, because this module is a shared resource.
---
 cc3200/util/hash.c | 13 ++++---------
 cc3200/util/hash.h |  4 +++-
 2 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/cc3200/util/hash.c b/cc3200/util/hash.c
index acd1475552..c25ebb2b06 100644
--- a/cc3200/util/hash.c
+++ b/cc3200/util/hash.c
@@ -40,20 +40,16 @@
 #include "simplelink.h"
 
 
-static _SlLockObj_t hash_LockObj;
-
-
+/******************************************************************************
+ DEFINE PUBLIC FUNCTIONS
+ ******************************************************************************/
 void HASH_Init (void) {
     // Enable the Data Hashing and Transform Engine
     MAP_PRCMPeripheralClkEnable(PRCM_DTHE, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
-    sl_LockObjCreate(&hash_LockObj, "HashLock");
+    MAP_PRCMPeripheralReset(PRCM_DTHE);
 }
 
 void HASH_SHAMD5Start (uint32_t algo, uint32_t blocklen) {
-    sl_LockObjLock (&hash_LockObj, SL_OS_WAIT_FOREVER);
-    // reset the perihperal before starting any new operation
-    MAP_PRCMPeripheralReset(PRCM_DTHE);
-
     // wait until the context is ready
     while ((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_CONTEXT_READY) == 0);
 
@@ -79,5 +75,4 @@ void HASH_SHAMD5Read (uint8_t *hash) {
     while((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_OUTPUT_READY) == 0);
     // read the result
     MAP_SHAMD5ResultRead(SHAMD5_BASE, hash);
-    sl_LockObjUnlock (&hash_LockObj);
 }
diff --git a/cc3200/util/hash.h b/cc3200/util/hash.h
index edea1e3fce..ea7b9f78db 100644
--- a/cc3200/util/hash.h
+++ b/cc3200/util/hash.h
@@ -27,10 +27,12 @@
 #ifndef HASH_H_
 #define HASH_H_
 
+/******************************************************************************
+ DECLARE PUBLIC FUNCTIONS
+ ******************************************************************************/
 extern void HASH_Init (void);
 extern void HASH_SHAMD5Start (uint32_t algo, uint32_t blocklen);
 extern void HASH_SHAMD5Update (uint8_t *data, uint32_t datalen);
 extern void HASH_SHAMD5Read (uint8_t *hash);
 
-
 #endif /* HASH_H_ */