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Pseudo-Code Group 111

Pseudo-Code Group 111. Electronic Lock Boris Barreto Anthony Cappetto Stephen Kwon Nahom Tewolde. Overall Design. - Enable Interrupts (for Debug) - Loop Through main.c - Get key inputs (From keypad.asm) - Constantly check inputs until a good one is found - Enter appropriate function

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Pseudo-Code Group 111

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  1. Pseudo-Code Group 111 Electronic Lock Boris Barreto Anthony Cappetto Stephen Kwon NahomTewolde

  2. Overall Design • - Enable Interrupts (for Debug) • - Loop Through main.c • - Get key inputs (From keypad.asm) • - Constantly check inputs until a good one is found • - Enter appropriate function • - Perform appropriate function (ASM or C) • This is the overall design for what the program will be doing constantly, in simple terms.

  3. main.c • Initialize all variables (including char[6] vInput, and intvCount, num) • //Function definitions (pseudocode for each function in future slides) • For (;;) • While (vCount != 100) • input = keypad_debounce(1000); // This is not vInput, this is just one character • If (inputvalid == true) • vInput[vCount--] = input; • ++num; • CheckInput(vInput, num); • Else • Do nothing (Loop and check again) • If (vCount == 0) (If it reached the end of its input and its still not a valid code, restart it) • Clear vInput[]; • vCount = 5; • // Should never exit this while loop.

  4. keypad.asm • Push registers used onto the stack • If (PTAD has been set up) branch endif • Else set up PTAD • DO • Output each row code // Starting from Row3 • Read each col code (col[j]) for every row • While (I > 0) // Where I is row[i] • If (I = 0 && j = 0) // End of the keypad, no key pressed • clearB • Pull variables • Return • Else // KeyPressed • Check if the key pressed is valid • If (valid) • Load b with appropriate ascii value for button pressed • Pull variables • Return • Else // Not valid • clearB • Pull variables • Return

  5. spin.asm • // Controls the motor just as in labs: • XREF Direction,Speed • Push registers to stack • Sequence: DC.B (Stepping Sequence) • LDY with Direction (To check it to see which direction to go in) • LDX Sequence • LDY Speed (Not sure how to control speed yet, my lab seven isn’t able to go fast yet. • If CW • LDAA 1,X- • Else • LDAA 1,X+ • Pull registers from stack • Return

  6. Keypad_debounce(intbouncelength) • getkey = hex_key_scan(); • Count = bouncelength/2; • While (count between 0 and bouncelength) • Delay • Newkey = hex_key_scan(); • If (newkey = getkey) • Increment count • Else • Decrement count • If (count == bouncelength) return getkey • Else • Return newkey

  7. CheckCodes(unsigned char * vInput, num) • // This one is gonna get messy with a lot of if statements, to hopefully optimize when the code will recognize a faulty code and reset its input. • If (num== 1) • If (vInput[5] = ‘*’) • Lock(); • If (vCount = 2) • if (((vInput[5] <= ‘9’ && vInput[5] >= ‘0’) || (vInput[5] >= ‘A’ && vInput[5] <= ‘D’)) && (vInput[4] == ‘#’ || vInput[4] == ‘*’)) • // Invalid Input • Clear vInput; • vCount = 5; • num = 0; • ETC (Check all the commands one by one, and run the appropriate command.) • Commands to be included are: Lock, DisplayUnlockCodes, OpenProgrammingMode (This might have CloseProgrammingModeInside it to check for when to close), Unlock, EraseCode) • // Notice no Debug, this is on the interrupt, so it will happen without being checked.

  8. Lock • Direction = ‘1’ (CW) • Speed = (90 times a minute) • spin(); • Clear vInput[]; • num = 0; // Restore the input to its original state (POR) • vCount = 5;

  9. OpenProgrammingMode // Im still not sure how to implement this one. Need to test ideas • Variables used which are defined in main: • char vUnlockCodes[9] • Unsigned intvCodesnum (Starting at 0); • If (vCodesnum == 9) • LCDPutString (“FULL”); • If ((vInput[3] >= ‘0’ && vInput[3] <= ‘9’) && vInput[2] >= ‘0’ && vInput[2] <= ‘9’) && (vInput[1] >= ‘0’ && vInput[1] <= ‘9’)) • // Valid Number Sequence • vInput[3] = vUnlockCodes[vCodesnum++]; • LCDPut • vInput[2] = vUnlockCodes[vCodesnum++]; • LCDPut • vInput[1] = vUnlockCodes[vCodesnum++]; • LCDPut • Else • Retry with a new number;

  10. Display Unlock Codes • LCDPutString(First three numbers in vUnlockCodes[]); • DELAY • LCDPutString(Next three numbers); • DELAY • LCDPutString(LastThreeNumbers); • Reset vInput, num, and vCount

  11. Unlock • Check the numbers input (from vInput[3-1]) with the numbers in vUnlockCodes[8-6,5-3,2-0]. • If (Any Match in the three numbers) • Unlock • LCDPut (OK) • Else • DontUnlock • LCDPut(NOTVALID) • Reset vInput, vCount, and num

  12. EraseCode • LCDPut(ERASED); • Clear vUnlockCodes[]; • Reset vCodesNum = 0;

  13. Clear (unsigned char * x, int length) • For (inti = 0, i <= length, i++) • X[i] = ‘J’; // Random letter for a place holder.

  14. Debug • PTT_PT7 = 1; • LCDPut(DEBUG); • While (PB1 == 1) • DELAY • While (POT is Range 1 && PB1 == 1) • Direction = CCW • Spin(); • Delay • While (POT is Range 2 && PB == 1) • Direction = CCW • Spin(); • Delay • While (POT is Range 3 && PB == 1) • Direction = Stopped • Spin(); • Delay • LEDS = OFF • LCDPUt(POR); • PTT_PTT7 = 0;

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