Diff: main.cpp

Revision:

4:46919eec2c28

Parent:

3:2272f89aad7e

Child:

5:df9f75bee8ac

--- a/main.cpp	Sat Aug 11 00:39:38 2018 +0000
+++ b/main.cpp	Sat Aug 11 10:26:09 2018 +0000
@@ -51,8 +51,17 @@
 DigitalOut bLED(LED3);
 int main()
 {
+    #define CHALLENGE_SZ 20
+    static const uint8_t challenge_1[CHALLENGE_SZ] = {  // 160 bit
+        0x5e, 0x81, 0x35, 0x24,
+        0x56, 0x63, 0xd6, 0x09,
+        0x99, 0x8d, 0x7b, 0x0d,
+        0x52, 0x12, 0x84, 0x65,
+        0xcd, 0x0d, 0xe3, 0x01
+    };
+
     uint8_t data[5];
-    int c;
+    int i;
 
 //    daplink.printf("daplink serial port\r\n");
 //    microUSB.printf("micro USB serial port\r\n");
@@ -63,13 +72,51 @@
     rLED = LED_OFF;
     printf("\r\n\rmax86140 authenication software\r\n");
     MAX8614X m(spi,cs,interrupt_pin);
-    m.readRegister(0xff, data, 1);
+    m.readRegister(MAX8614X::MAX8614X_PART_ID_REG, data, 1);
     printf("device id should be 0x24, read val = %x\r\n", data[0]);
-    m.writeRegister(0x3,1);
+
+    //● Enable SHA_DONE Interrupt
+    m.writeRegister(MAX8614X::MAX8614X_INT_ENABLE2_REG, MAX8614X::MAX8614X_IE_SHA_DONE_EN);
+
+    m.readRegister(MAX8614X::MAX8614X_INT_ENABLE2_REG, data, 1);
+    printf("enable sha done interrupt, read val = %d\r\n", data[0]);
+
+
+    //● Enable SHA_EN bit.
+    m.writeRegister(MAX8614X::MAX8614X_SHA_CFG_REG,MAX8614X::MAX8614X_SHACMD_SHA_EN);
 
-    m.readRegister(0x3, data, 1);
-    printf("enable sha, read val = %d\r\n", data[0]);
+    m.readRegister(MAX8614X::MAX8614X_SHA_CFG_REG, data, 1);
+    printf("enable sha cmd, read val = %d\r\n", data[0]);
+    
+    //● Write 160-bit random challenge value to RAM using registers MEM_IDX and MEM_DATA.
+    // Enable Memory Write, Select Bank 0, address 0x00 to 0xFF
+    m.writeRegister(MAX8614X::MAX8614X_MEMORY_CONTROL_REG, MAX8614X::MAX8614X_MEMCNTRL_WR_EN_MASK | MAX8614X::MAX8614X_MEMCNTRL_BANK0_MASK);
+       m.readRegister(MAX8614X::MAX8614X_MEMORY_CONTROL_REG, data, 1);
+    printf("MEM CNTRL REG should be 2, read val = %d\r\n", data[0]);
+ 
+    for (i = 0; i < CHALLENGE_SZ; i++) {
+        m.writeRegister(MAX8614X::MAX8614X_MEMORY_INDEX_REG, i);
+        m.writeRegister(MAX8614X::MAX8614X_MEMORY_DATA_REG, challenge_1[i]);
+    } 
 
+    for (i = 0; i < CHALLENGE_SZ; i++) {
+        m.writeRegister(MAX8614X::MAX8614X_MEMORY_INDEX_REG, i);
+        m.readRegister(MAX8614X::MAX8614X_MEMORY_DATA_REG, data, 1);
+        printf("%02x ", data[0]);
+    } 
+    printf("%\r\n");
+    
+    //● Write command, with ROM ID (0x35) or without ROM ID (0x36), to SHA_CMD register
+    //● Write 1 to SHA_START and 1 to SHA_EN bit.
+    
+    //● Wait for SHA_DONE interrupt.
+    //m.clearShaComplete();
+    //while(m.isShaComplete()) {
+    //}   
+    // ● Read 256 MAC value from RAM using registers MEM_IDX and MEM_DATA.
+    //● Compare MAC from MAX86140 wth Host's precalculated MAC.
+    //● Check PASS or FAIL.
+    //● Disable SHA_EN bit ( Write 0 to SHA_EN bit).     
     while(1) {
         gLED = !gLED;
         wait(1.0);