73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
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#include "std.h"
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#include <stdint.h>
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#include <stdbool.h>
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#include "inc/hw_types.h"
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#include "inc/hw_ints.h"
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#include "inc/hw_nvic.h"
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#include "inc/hw_shamd5.h"
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#include "inc/hw_dthe.h"
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#include "hw_memmap.h"
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#include "rom_map.h"
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#include "prcm.h"
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#include "shamd5.h"
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#include "hash.h"
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#ifdef USE_FREERTOS
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#include "FreeRTOS.h"
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#include "task.h"
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#include "semphr.h"
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#endif
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#ifdef USE_FREERTOS
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static SemaphoreHandle_t xShamd5Semaphore = NULL;
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#endif
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void HASH_Init (void) {
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// Enable the Data Hashing and Transform Engine
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MAP_PRCMPeripheralClkEnable(PRCM_DTHE, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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#ifdef USE_FREERTOS
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vSemaphoreCreateBinary(xShamd5Semaphore);
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#endif
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}
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void HASH_SHAMD5Start (uint32_t algo, uint32_t blocklen) {
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#ifdef USE_FREERTOS
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xSemaphoreTake (xShamd5Semaphore, portMAX_DELAY);
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#endif
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MAP_PRCMPeripheralReset(PRCM_DTHE);
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// wait until the context is ready
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while ((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_CONTEXT_READY) == 0);
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// Configure the SHA/MD5 module algorithm
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MAP_SHAMD5ConfigSet(SHAMD5_BASE, algo);
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// if not a multiple of 64 bytes, close the hash
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if (blocklen % 64) {
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HWREG(SHAMD5_BASE + SHAMD5_O_MODE) |= SHAMD5_MODE_CLOSE_HASH;
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}
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// set the lenght
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HWREG(SHAMD5_BASE + SHAMD5_O_LENGTH) = blocklen;
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}
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void HASH_SHAMD5Update (uint8_t *data, uint32_t datalen) {
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// write the data
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SHAMD5DataWriteMultiple(data, datalen);
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}
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void HASH_SHAMD5Read (uint8_t *hash) {
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// wait for the output to be ready.
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while((HWREG(SHAMD5_BASE + SHAMD5_O_IRQSTATUS) & SHAMD5_INT_OUTPUT_READY) == 0);
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// read the result.
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MAP_SHAMD5ResultRead(SHAMD5_BASE, hash);
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#ifdef USE_FREERTOS
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xSemaphoreGive (xShamd5Semaphore);
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#endif
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}
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