LCD 20x4 ( 4 bits ) lib

All these variables are declared. As said above , I am studying the systicks , delay ... Below is the code of main.c. Operating at 72Mhz.

Grateful.

#include <stdio.h>
#include <stdint.h>
#include "../cmsis/device/lpc134x.h"
#include "../core/gpio/gpio.h"

int main(void) {
        SystemCoreClockUpdate();               // 72Mhz
        SysTick_Config(SystemCoreClock / 100); // 1 = 1us / 10 = 1ms / 100 = 10ms / 1000 = 100ms
        gpioSetDir(GPIO_GPIO1_BASE, GPIO_PIN3, gpioDirection_Output);
        while (1) {
                gpioSetValue(GPIO_GPIO1_BASE, GPIO_PIN3, GPIO_PIN3);
                systickDelay(10000);
                gpioSetValue(GPIO_GPIO1_BASE, GPIO_PIN3, 0x00);
                systickDelay(10000);
        }
}

All these variables are declared. As said above , I am studying the systicks , delay ... Below is the code of main.c. Operating at 72Mhz.

Grateful.

#include <stdio.h>
#include <stdint.h>
#include "../cmsis/device/lpc134x.h"
#include "../core/gpio/gpio.h"

int main(void) {
        SystemCoreClockUpdate();               // 72Mhz
        SysTick_Config(SystemCoreClock / 100); // 1 = 1us / 10 = 1ms / 100 = 10ms / 1000 = 100ms
        gpioSetDir(GPIO_GPIO1_BASE, GPIO_PIN3, gpioDirection_Output);
        while (1) {
                gpioSetValue(GPIO_GPIO1_BASE, GPIO_PIN3, GPIO_PIN3);
                systickDelay(10000);
                gpioSetValue(GPIO_GPIO1_BASE, GPIO_PIN3, 0x00);
                systickDelay(10000);
        }
}

All these variables are declared.

Yes, but as I asked:

Have you forgotten to make msTicks volatile?

If you don't, then it's unlikely to work with an optimizing compiler.

//LCD.c
void lcd_delay(int msec) {
        volatile uint32_t done = msTicks + msec;
        while (msTicks != done)
                ;
}

//LCD.h
volatile uint32_t msTicks;
//...

//VTABLE.c
void SysTick_Handler(void) {
        msTicks++;
}

So it would make sense to check whether you're actually executing SysTick_Handler.