ENCCS = 0x40;//ECB  
// Generate Key:
// In a radio application this is typically generated based on
// a standard/protocol specification. However, for simplicity,
// this app report does not use any particular specification
// for generating it.
for(i = 0; i < SIZE_OF_AES_BLOCK; i++) { key[i] = i * 2; }
// Download Key (Set ENCCS.CMD = 10b),
// and start corresponding AES process (ENCCS.ST = 1)
ENCCS = 0x04 | 0x01;
printf("key ");
for (i = 0; i < SIZE_OF_AES_BLOCK; i++) {
ENCDI = key[i];
printf("%x ",key[i]);
}
printf("\r\n");
// Monitor AES (ENCCS.RDY) to wait until key downloaded
while(!(ENCCS & 0x08));
// Generate IV/NONCE:
// In a radio application this is typically generated based on
// a standard/protocol specification. However, for simplicity,
// this app report does not use any particular specification
// for generating it.
//printf("IV ");
//for(i = 0; i < SIZE_OF_AES_BLOCK; i++) { iv_nonce[i] = i; 
//printf("%x ",iv_nonce[i]);
//}
//printf("\r\n");
//// Dwonload IV/NONCE (Set ENCCS.CMD = 11b)
//// and start corresponding AES process (ENCCS.ST = 1)
//ENCCS = 0x06 | 0x01;
//for (i = 0; i < SIZE_OF_AES_BLOCK; i++) {
//ENCDI = iv_nonce[i];
//}
//// Monitor AES (ENCCS.RDY) to wait until IV/NONCE downloaded
//while(!(ENCCS & 0x08));
//



////////////////////////////////////////////////////////////////
// Place code here for downloading key and IV/NONCE (see Example 5)
////////////////////////////////////////////////////////////////
// Perform AES encryption/decryption on allocated AES buffer ("aes_buffer_1"):
for (j = 0; j < SIZE_OF_ENC_PACKET/SIZE_OF_AES_BLOCK; j++) {
// Configure and start AES coprocessor for the desired AES mode:
// Encryption => ENCCS.CMD = 00b, decryption mode => ENCCS.CMD = 01b.
// Use so-called Cipher Block Chaining encryption mode => ENCCS.MODE = 000b.
// Start AES processing (ENCCS.ST = 1) of source buffer (aes_buffer_1).
ENCCS = 0x00 | 0x01; // Only valid for encryption mode !
//ENCCS = 0x02 | 0x01; // Only valid for decryption mode !
// Download data block (16 bytes) to AES coprocessor:
// In encryption mode, "aes_buffer_1" represents the data to be encrypted.
// In decryption mode, "aes_buffer_1" represents the data to be decrypted.
printf("text ");
for (i = 0; i < SIZE_OF_AES_BLOCK; i++) {
ENCDI = aes_buffer_1[i+(j*SIZE_OF_AES_BLOCK)];
printf("%x ",aes_buffer_1[i+(j*SIZE_OF_AES_BLOCK)]);
}
printf("\r\n");
// Wait until AES download is finished, that is; apply delay
// equivalent to 40 NOPs:
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
// Upload data block (16 bytes) to allocated AES buffer:
// In encryption mode, "aes_buffer_2" represents the encrypted data.
// In decryption mode, "aes_buffer_2" represents the decrypted data.
printf("result ");
for (i = 0; i < SIZE_OF_AES_BLOCK; i++) {
aes_buffer_2[i+(j*SIZE_OF_AES_BLOCK)] = ENCDO;
printf("%x ",aes_buffer_2[i+(j*SIZE_OF_AES_BLOCK)]);
}
printf("\r\n");
// Monitor AES (ENCCS.RDY) to wait until data block downloaded
while(!(ENCCS & 0x08));
}


printf("\r\n");
printf("\r\n");
printf("\r\n");
printf("\r\n");
////////////////////////////////////////////////////////////////
// Place code here for downloading key and IV/NONCE (see Example 5)
////////////////////////////////////////////////////////////////
// Perform AES encryption/decryption on allocated AES buffer ("aes_buffer_1"):
for (j = 0; j < SIZE_OF_ENC_PACKET/SIZE_OF_AES_BLOCK; j++) {
// Configure and start AES coprocessor for the desired AES mode:
// Encryption => ENCCS.CMD = 00b, decryption mode => ENCCS.CMD = 01b.
// Use so-called Cipher Block Chaining encryption mode => ENCCS.MODE = 000b.
// Start AES processing (ENCCS.ST = 1) of source buffer (aes_buffer_1).
//ENCCS = 0x00 | 0x01; // Only valid for encryption mode !
ENCCS = 0x02 | 0x01; // Only valid for decryption mode !
// Download data block (16 bytes) to AES coprocessor:
// In encryption mode, "aes_buffer_1" represents the data to be encrypted.
// In decryption mode, "aes_buffer_1" represents the data to be decrypted.
printf("text ");
for (i = 0; i < SIZE_OF_AES_BLOCK; i++) {
ENCDI = aes_buffer_2[i+(j*SIZE_OF_AES_BLOCK)];
printf("%x ",aes_buffer_2[i+(j*SIZE_OF_AES_BLOCK)]);
}
printf("\r\n");
// Wait until AES download is finished, that is; apply delay
// equivalent to 40 NOPs:
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
asm("NOP");asm("NOP");asm("NOP");asm("NOP");asm("NOP");
// Upload data block (16 bytes) to allocated AES buffer:
// In encryption mode, "aes_buffer_2" represents the encrypted data.
// In decryption mode, "aes_buffer_2" represents the decrypted data.
printf("result ");
for (i = 0; i < SIZE_OF_AES_BLOCK; i++) {
aes_buffer_1[i+(j*SIZE_OF_AES_BLOCK)] = ENCDO;
printf("%x ",aes_buffer_1[i+(j*SIZE_OF_AES_BLOCK)]);
}
printf("\r\n");
// Monitor AES (ENCCS.RDY) to wait until data block downloaded
while(!(ENCCS & 0x08));
}