main.c

#include "LPC11xx.h"                        /* LPC11xx definitions */

#include "timer16.h"

#include "clkconfig.h"

#include "gpio.h"

#include <cr_section_macros.h>

#include <NXP/crp.h>

// Variable to store CRP value in. Will be placed automatically

// by the linker when "Enable Code Read Protect" selected.

// See crp.h header for more information

__CRP const unsigned int CRP_WORD = CRP_NO_CRP;

#define LCD_PORT 2    // Port for lcd

#define LCD_RS 0

#define LCD_RW 1

#define LCD_E 2

#define LCD_DB0 3

#define LCD_DB1 4

#define LCD_DB2 5

#define LCD_DB3 6

#define LCD_DB4 7

#define LCD_DB5 8

#define LCD_DB6 9

#define LCD_DB7 10

#define LCD_ENABLE_TIME 100

extern volatile uint32_t timer16_0_counter;

void pauseMillis(uint16_t millis);

void initOutputs(void);

void LCD_send(uint8_t valRS, uint8_t valRW, uint8_t valDB7, uint8_t valDB6, uint8_t valDB5, uint8_t valDB4, uint8_t valDB3, uint8_t valDB2, uint8_t valDB1, uint8_t valDB0);

int main(void) {

  initOutputs();

  // 1. part init

  pauseMillis(100); //30ms

  LCD_send(0,0,0,0,1,1,0,0,0,0);

  pauseMillis(100); //4.1µs

  LCD_send(0,0,0,0,1,1,0,0,0,0);

  pauseMillis(100); //100µs

  LCD_send(0,0,0,0,1,1,0,0,0,0);

  pauseMillis(100); //0ms

  // 2. part init

  //Function set

  LCD_send(0,0,0,0,1,1,  1,0,  0,0); // N=1 (2 lines); F=0 (5x7 dots)

  pauseMillis(100); //0ms

  //Display off

  LCD_send(0,0,0,0,0,0,1,0,0,0);

  pauseMillis(100); //0ms

  //clear display

  LCD_send(0,0,0,0,0,0,0,0,0,1);

  pauseMillis(100); //0ms

  //Entry mode set

  LCD_send(0,0,0,0,0,0,0,1, 1,0); // I/D=1 (Increment cursor pos); S=0 (don't shift display)

  pauseMillis(100);

  //initialization finished

  //Display on

  LCD_send(0,0,0,0,0,0,1, 1,1,1); // D=1 (disp on); C=1 (cursor on); B=1 (cursor blink on)

  while (1) /* Loop forever */

  {

  }

}

void initOutputs() {

  GPIOInit();

  // Set ports for LCD to output

  GPIOSetDir(LCD_PORT, LCD_RS, 1);

  GPIOSetDir(LCD_PORT, LCD_RW, 1);

  GPIOSetDir(LCD_PORT, LCD_E, 1);

  GPIOSetDir(LCD_PORT, LCD_DB0, 1);

  GPIOSetDir(LCD_PORT, LCD_DB1, 1);

  GPIOSetDir(LCD_PORT, LCD_DB2, 1);

  GPIOSetDir(LCD_PORT, LCD_DB3, 1);

  GPIOSetDir(LCD_PORT, LCD_DB4, 1);

  GPIOSetDir(LCD_PORT, LCD_DB5, 1);

  GPIOSetDir(LCD_PORT, LCD_DB6, 1);

  GPIOSetDir(LCD_PORT, LCD_DB7, 1);

  // Set ports for LCD to 'low'

  GPIOSetValue(LCD_PORT, LCD_RS, 0);

  GPIOSetValue(LCD_PORT, LCD_RW, 0);

  GPIOSetValue(LCD_PORT, LCD_E, 0);

  GPIOSetValue(LCD_PORT, LCD_DB0, 0);

  GPIOSetValue(LCD_PORT, LCD_DB1, 0);

  GPIOSetValue(LCD_PORT, LCD_DB2, 0);

  GPIOSetValue(LCD_PORT, LCD_DB3, 0);

  GPIOSetValue(LCD_PORT, LCD_DB4, 0);

  GPIOSetValue(LCD_PORT, LCD_DB5, 0);

  GPIOSetValue(LCD_PORT, LCD_DB6, 0);

  GPIOSetValue(LCD_PORT, LCD_DB7, 0);

}

//Pause-Funktionen

void initTimer16(void);

uint8_t timer16_initialized = 0;

void pauseMillis(uint16_t millis) {

  if (!timer16_initialized)

    initTimer16();

  timer16_0_counter = 0;

  while (timer16_0_counter <= millis)

    ;

}

void initTimer16() {

  init_timer16(0, (SystemCoreClock / LPC_SYSCON ->SYSAHBCLKDIV) / 1000);

  // Initialise counter that counts Timer16_0 ticks

  timer16_0_counter = 0;

  //Enable Timer16_0

  enable_timer16(0);

}

void LCD_enable(void);

void LCD_send(uint8_t valRS, uint8_t valRW, uint8_t valDB7, uint8_t valDB6, uint8_t valDB5, uint8_t valDB4, uint8_t valDB3, uint8_t valDB2, uint8_t valDB1, uint8_t valDB0){

  // Set RS- and R/W- ports to the specified values

  GPIOSetValue(LCD_PORT, LCD_RS, valRS);

  GPIOSetValue(LCD_PORT, LCD_RW, valRW);

  // Set DB-ports to the specified values

  GPIOSetValue(LCD_PORT, LCD_DB0, valDB0);

  GPIOSetValue(LCD_PORT, LCD_DB1, valDB1);

  GPIOSetValue(LCD_PORT, LCD_DB2, valDB2);

  GPIOSetValue(LCD_PORT, LCD_DB3, valDB3);

  GPIOSetValue(LCD_PORT, LCD_DB4, valDB4);

  GPIOSetValue(LCD_PORT, LCD_DB5, valDB5);

  GPIOSetValue(LCD_PORT, LCD_DB6, valDB6);

  GPIOSetValue(LCD_PORT, LCD_DB7, valDB7);

  // Send the enable-Signal

  LCD_enable();

}

void LCD_enable(void){

  GPIOSetValue(LCD_PORT, LCD_E, 1);

  pauseMillis(LCD_ENABLE_TIME);

  GPIOSetValue(LCD_PORT, LCD_E, 0);

}