Lab4 - LCD Driver C2C John Miller

Implements LCD device drivers for the MSP 430 Takes in 3 messages and 3 keys, and based on button presses, decrypts the message, scrolls "ECE382 is my favorite class" on the top line, and the decrypted message on the bottom.

functions used: (descriptions will be added as the functions are created)

/--------------------------------------------------- Function Name: initButtons Author: C2C John Miller, USAF Function: Initializes bits 0, 1, and 2 as inputs for buttons Inputs: none Outputs: none Subroutines used: configureP1PinAsButton ---------------------------------------------------/

void initButtons();

/--------------------------------------------------- Function Name: INITSPI Author: C2C John Miller, USAF Function: Initializes the SPI of the MSP430 Inputs: none Outputs: none Subroutines used: none ---------------------------------------------------/ void initSPI();

/--------------------------------------------------- Function Name: LCDinit Author: Capt Todd Branchflower, USAF Function: Initializes the LCD screen of the MSP430 Inputs: none Outputs: none Subroutines used: none ---------------------------------------------------/ void LCDinit();

/--------------------------------------------------- Function Name: initProgram Author: C2C John Miller, USAF Function: Initializes the program Inputs: none Outputs: none Subroutines used: LCDinit, initSPI, LCDclear, initButtons ---------------------------------------------------/

void initProgram(); /--------------------------------------------------- Function Name: LCDclear Author: Capt Todd Branchflower, USAF Function: Clears the LCD screen of the MSP430 Inputs: none Outputs: none Subroutines used: none ---------------------------------------------------/ void LCDclear();

/--------------------------------------------------- Function Name: cursorToLineTwo Author: C2C John Miller, USAF Function: set the cursor to the beginning of the bottom half of the LCD Inputs: none Outputs: none Subroutines used: cursorToLineOne, writeCommandByte ---------------------------------------------------/ void cursorToLineTwo();

/--------------------------------------------------- Function Name: cursorToLineTwo Author: C2C John Miller, USAF Function: set the cursor to the beginning of the top half of the LCD Inputs: none Outputs: none Subroutines used: writeCommandByte ---------------------------------------------------/ void cursorToLineOne();

/--------------------------------------------------- Function Name: writeChar Author: C2C John Miller, USAF Function: Writes a single character Inputs: asciiChar Outputs: none Subroutines used: writeCommandByte, writeDataByte ---------------------------------------------------/ void writeChar(char asciiChar);

/--------------------------------------------------- Function Name: writeString Author: C2C John Miller, USAF Function: Writes a string of characters Inputs: string, length Outputs: none Subroutines used: writeChar ---------------------------------------------------/ void writeString(char * string, int length);

/--------------------------------------------------- Function Name: scrollString Author: C2C John Miller, USAF Function: Scrolls a message across the top of the lcd screen. Inputs: string1, string2, message1Length Outputs: none Subroutines used: writeString ---------------------------------------------------/ void scrollString(char * string1, char * string2, int message1Length, int message2Length);

/--------------------------------------------------- Function Name: SET_SS_HI Author: C2C John Miller, USAF Function: ; Sets slave select to high (disabled) on the LCD Inputs: none Outputs: none Subroutines used: none ---------------------------------------------------/ void set_SS_Hi();

/--------------------------------------------------- Function Name: SET_SS_LO Author: C2C John Miller, USAF Function: ; Sets slave select to low (enabled) on the LCD Inputs: none Outputs: none Subroutines used: none ---------------------------------------------------/ void set_SS_Lo();

/--------------------------------------------------- Subroutine Name: SPI_send Author: Capt Todd Branchflower, USAF Function: Send a byte to the SPI for either commands or data Outputs: none Subroutines used: set_SS_hi, set_SS_lo ---------------------------------------------------/ void SPI_send(char byteToSend);

/--------------------------------------------------- Subroutine Name: calibrateClock Author: C2C John Miller, USAF Function: calibrates clock of the MSP430 to 1, 8 12 or 16 MHz Inputs:frequency (must be 1, 8, 12, or 16) Outputs: none Subroutines used: none ---------------------------------------------------/ void calibrateClock(char frequency);

/--------------------------------------------------- Subroutine Name: LCD_write_8 Author: Capt Todd Branchflower, USAF Function: Send full byte to LCD Inputs: byteToSend Outputs: none Subroutines used: LCD_write_4 ---------------------------------------------------/ void LCD_write_8(char byteToSend);

/--------------------------------------------------- Subroutine Name: LCD_write_4 Author: C2C John Miller, USAF Function: Send 4 bits of data to LCD via SPI. sets upper four bits to match LCDCON. Inputs: byteToSend Outputs: none Subroutines used: LCD_write_4 ---------------------------------------------------/ void LCD_write_4(unsigned char byteToSend);

/--------------------------------------------------- Function Name: delayMicro Author: C2C John Miller, USAF Function: Delays the MSP430 by 40.5 microseconds Inputs: none Outputs: none Subroutines used: __delay_cycles() ---------------------------------------------------/ void delayMicro();

/--------------------------------------------------- Function Name: delayMilli Author: C2C John Miller, USAF Function: Delays the MSP430 by 1.65 milliseconds Inputs: none Outputs: none Subroutines used: __delay_cycles() ---------------------------------------------------/ void delayMilli();