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cc3200: Do not reset the DTHE module before every SHA operation.

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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.
This commit is contained in:
danicampora 2015-03-15 20:15:14 +01:00
parent b2cb75efb7
commit dc545d6512
2 changed files with 7 additions and 10 deletions
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13
cc3200/util/hash.c
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@ -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);
}

4
cc3200/util/hash.h
View File

@ -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_ */