Tiva Lab 04: Interfacing Character LCD with Tiva LaunchPad

The following code does not complete, you need to finish the GPIO configurations.

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>

#include "TM4C123GH6PM.h"
#include "MyDefines.h"
#include "ez123G.h"

void Setup_GPIO(void);

int main(void)
{
    PEZOBJ_LCD  lcd;                                // Declare an object for LCD module
    char        str[100];    
    uint16_t    i = 0;

    Setup_GPIO();                                   // GPIO Configuration

    lcd = ezLCD_Create();                           // Creating a new Hardware LCD Object
    ezLCD_Connect_DataPort(lcd, _PORTD, ON_PIN_3_0);// Connecting DATA port on PortD[3:0]
    ezLCD_Connect_ENPin(lcd, _PORTE, _PIN1);        // Connecting EN pin on PortE[1]
    ezLCD_Connect_RSPin(lcd, _PORTE, _PIN2);        // Connecting RS pin on PortE[2]
    ezLCD_Connect_RWPin(lcd, _PORTE, _PIN3);        // Connecting RW pin on PortE[3]

    ezLCD_Start(lcd);                               // Starting lcd object
    ezLCD_LoadVerticalBargraphFonts(lcd);           // Load vertical bargraph fonts

    ezLCD_ClearDisplay(lcd);                        // Clear LCD display
    ezLCD_PrintString(lcd, "HELLO");                // Display string on LCD screen
    ezLCD_Position(lcd, 1,0);                       // Set display position at [1,0] (raw 1. col 0)
    ezLCD_PrintString(lcd, "TI Tiva 123G");         // Display string on LCD screen

    while (1){
        sprintf(str,"i = %d  ", i);
        ezLCD_Position(lcd, 0, 6);
        ezLCD_PrintString(lcd, str);

        ezLCD_DrawVerticalBG(lcd, 1, 15, 2, i%16);
        i++;
        timer_waitMillis(100);                      // Hardware timer delay for 100 ms
    }
}
//------------------------------------------------------------------------------
/*
Device      Port.Pins       DIR     DriveMode
LCD_RS
LCD_RW
LCD_E
LCD_D4
LCD_D5
LCD_D6
LCD_D7

Port ____
*/

void Setup_GPIO()
{
    // GPIO Initialization and Configuration
    // 1. Enable Clock to the GPIO Modules (SYSCTL->RCGCGPIO |= (_PORTs);)
    SYSCTL->RCGCGPIO |= (__);
    // allow time for clock to stabilize (SYSCTL->PRGPIO & (_PORTs))
    while ((SYSCTL->PRGPIO & (__)) != (__)) {};
    // 2. Unlock GPIO only PD7, PF0 on TM4C123G; PD7 on TM4C1294 (GPIOx->LOCK = 0x4C4F434B; and GPIOx->CR = _PINs;)
    // 3. Set Analog Mode Select bits for each Port (GPIOx->AMSEL = _PINs; 0=digital, 1=analog)
    // 4. Set Port Control Register for each Port (GPIOx->PCTL = PMCn << _PTCL_PINn, check the PCTL table)
    // 5. Set Alternate Function Select bits for each Port (GPIOx->AFSEL = _PINs; 0=regular I/O, 1=PCTL peripheral)
    // 6. Set Output pins for each Port (Direction of the Pins: GPIOx->DIR = _PINs; 0=input, 1=output)

    // 7. Set PUR bits (internal Pull-Up Resistor), PDR (Pull-Down Resistor), ODR (Open Drain) for each Port (0: disable, 1=enable)
    // 8. Set Digital ENable register on all port.pins (GPIOx->DEN = _PINs; 0=disable, 1=enable)

}

The following code does not complete, you need to finish the GPIO configurations.

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdint.h>

#include "TM4C1294NCPDT.h"
#include "MyDefines.h"
#include "ez1294.h"

void Setup_GPIO(void);

int main(void)
{
    PEZOBJ_LCD  lcd;                                // Declare an object for LCD module
    char        str[100];
    uint16_t    i = 0;

    Setup_GPIO();                                   // GPIO Configuration

    lcd = ezLCD_Create();                           // Creating a new Hardware LCD Object
    ezLCD_Connect_DataPort(lcd, _PORTE, ON_PIN_3_0);// Connecting DATA port on PortE[3:0]
    ezLCD_Connect_ENPin(lcd, _PORTD, _PIN7);        // Connecting EN pin on PortD[7]
    ezLCD_Connect_RSPin(lcd, _PORTA, _PIN6);        // Connecting RS pin on PortA[6]
    ezLCD_Connect_RWPin(lcd, _PORTM, _PIN4);        // Connecting RW pin on PortM[4]

    ezLCD_Start(lcd);                               // Starting lcd object
    ezLCD_LoadVerticalBargraphFonts(lcd);           // Load vertical bargraph fonts

    ezLCD_ClearDisplay(lcd);                        // Clear LCD display
    ezLCD_PrintString(lcd, "HELLO");                // Display string on LCD screen
    ezLCD_Position(lcd, 1,0);                       // Set display position at [1,0] (raw 1. col 0)
    ezLCD_PrintString(lcd, "TI Tiva 1294");         // Display string on LCD screen

    while (1){
        sprintf(str,"i = %d  ", i);
        ezLCD_Position(lcd, 0, 6);
        ezLCD_PrintString(lcd, str);

        ezLCD_DrawVerticalBG(lcd, 1, 15, 2, i%16);
        i++;
        timer_waitMillis(100);                      // Hardware timer delay for 100 ms
    }
}
//------------------------------------------------------------------------------
/*
Device      Port.Pins       DIR     DriveMode
LCD_RS
LCD_RW
LCD_E
LCD_D4
LCD_D5
LCD_D6
LCD_D7

Port ____
*/

void Setup_GPIO()
{
    // GPIO Initialization and Configuration
    // 1. Enable Clock to the GPIO Modules (SYSCTL->RCGCGPIO |= (_PORTs);)
    SYSCTL->RCGCGPIO |= (__);
    // allow time for clock to stabilize (SYSCTL->PRGPIO & (_PORTs))
    while ((SYSCTL->PRGPIO & (__)) != (__)) {};
    // 2. Unlock GPIO only PD7, PF0 on TM4C123G; PD7 on TM4C1294 (GPIOx->LOCK = 0x4C4F434B; and GPIOx->CR = _PINs;)
    GPIOD_AHB->LOCK = 0x4C4F434B;
    while ((GPIOD_AHB->LOCK & 0x01) == 0x01); // Unlocked when reading the GPIOx->LOCK = 0x4C4F434B; ==0x00
    *(((char*)GPIOD_AHB)+0x524) = 0xFF;          // Unload PD7

    // 3. Set Analog Mode Select bits for each Port (GPIOx->AMSEL = _PINs;  0=digital, 1=analog)
    // 4. Set Port Control Register for each Port (GPIOx->PCTL = PMCn << _PTCL_PINn, check the PCTL table)
    // 5. Set Alternate Function Select bits for each Port (GPIOx->AFSEL = _PINs;  0=regular I/O, 1=PCTL peripheral)
    // 6. Set Output pins for each Port (Direction of the Pins: GPIOx->DIR = _PINs;  0=input, 1=output)

    // 7. Set PUR bits (internal Pull-Up Resistor), PDR (Pull-Down Resistor), ODR (Open Drain) for each Port (0: disable, 1=enable)
    // 8. Set Digital ENable register on all port.pins (GPIOx->DEN = _PINs; 0=disable, 1=enable)

}