1 files changed, 72 insertions, 0 deletions
diff --git a/cc3200/util/hash.c b/cc3200/util/hash.c
new file mode 100644
index 000000000..a7afdf9f2
--- /dev/null
+++ b/cc3200/util/hash.c
@@ -0,0 +1,72 @@
+#include "std.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include "inc/hw_types.h"
+#include "inc/hw_ints.h"
+#include "inc/hw_nvic.h"
+#include "inc/hw_shamd5.h"
+#include "inc/hw_dthe.h"
+#include "hw_memmap.h"
+#include "rom_map.h"
+#include "prcm.h"
+#include "shamd5.h"
+#include "hash.h"
+
+#ifdef USE_FREERTOS
+#include "FreeRTOS.h"
+#include "task.h"
+#include "semphr.h"
+#endif
+
+
+#ifdef USE_FREERTOS
+static SemaphoreHandle_t xShamd5Semaphore = NULL;
+#endif
+
+void HASH_Init (void) {
+    // Enable the Data Hashing and Transform Engine
+    MAP_PRCMPeripheralClkEnable(PRCM_DTHE, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
+#ifdef USE_FREERTOS
+    vSemaphoreCreateBinary(xShamd5Semaphore);
+#endif
+}
+
+
+
+void HASH_SHAMD5Start (uint32_t algo, uint32_t blocklen) {
+
+#ifdef USE_FREERTOS
+    xSemaphoreTake (xShamd5Semaphore, portMAX_DELAY);
+#endif
+
+    MAP_PRCMPeripheralReset(PRCM_DTHE);
+
+    // wait until the context is ready
+    while ((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_CONTEXT_READY) == 0);
+
+    // Configure the SHA/MD5 module algorithm
+    MAP_SHAMD5ConfigSet(SHAMD5_BASE, algo);
+
+    // if not a multiple of 64 bytes, close the hash
+    if (blocklen % 64) {
+        HWREG(SHAMD5_BASE + SHAMD5_O_MODE) |= SHAMD5_MODE_CLOSE_HASH;
+    }
+
+    // set the lenght
+    HWREG(SHAMD5_BASE + SHAMD5_O_LENGTH) = blocklen;
+}
+
+void HASH_SHAMD5Update (uint8_t *data, uint32_t datalen) {
+    // write the data
+    SHAMD5DataWriteMultiple(data, datalen);
+}
+
+void HASH_SHAMD5Read (uint8_t *hash) {
+    // wait for the output to be ready.
+    while((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_OUTPUT_READY) == 0);
+    // read the result.
+    MAP_SHAMD5ResultRead(SHAMD5_BASE, hash);
+#ifdef USE_FREERTOS
+    xSemaphoreGive (xShamd5Semaphore);
+#endif
+}