File content as of revision 0:67db5ce17397:

#include "main.h"
#include "stm32f0xx_conf.h"
uint32_t TickValue=0;

#define RS GPIO_Pin_13 // RS is named as Port 13
#define RW GPIO_Pin_14 // RW is named as Port 14
#define EN GPIO_Pin_15 // EN is named as Port 15

//------------------------------------------------------------------------------
// Function Name : delay_ms
// Description : delay for some time in ms unit(accurate)
// Input : n_ms is how many ms of time to delay
//------------------------------------------------------------------------------
void TimingDelay_Decrement(void)
{
TickValue--; 
}

void delay_ms(uint32_t n_ms)
{
SysTick_Config(8000*PLL_MUL_X - 30);
TickValue = n_ms;
while(TickValue == n_ms)
; 
SysTick_Config(8000*PLL_MUL_X);
while(TickValue != 0)
;
}
//------------------------------------------------------------------------------
// Function Name : Init GPIO 
// Description : pins ,port clock & mode initialization.
//------------------------------------------------------------------------------
void initgpio()
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOC, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15 ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; 
GPIO_Init(GPIOA, &GPIO_InitStructure);


}
//------------------------------------------------------------------------------
// Function Name : s_init
// Description : Send Instruction Function (RS=0 & RW=0)
//------------------------------------------------------------------------------

void s_init() 
{
GPIOC->BRR=RS;
GPIOC->BRR=RW;
}
//------------------------------------------------------------------------------
// Function Name : s_data
// Description : Send Data Select routine(RS=1 & RW=0)
//------------------------------------------------------------------------------

void s_data() 
{
GPIOC->BSRR=RS;
GPIOC->BRR=RW;
}
//------------------------------------------------------------------------------
// Function Name : s_latch
// Description : Latch Data/Instruction on LCD Databus.
//------------------------------------------------------------------------------

void s_latch() 
{
GPIOC->BSRR=EN;
delay_ms(10);
GPIOC->BRR=EN;
delay_ms(10);
}