/*********************************************************************************/
/**
 * File: letters.c
 * Author: Jan Dvořák z Vozerovic 
 * FEL-ID: dvoraj42
 * e-mail: dvorkaman@gmail.com
 * site: dvorkaman.php5.cz
 */

#ifndef __letters_c__
#define __letters_c__

int getLCDLetterCommand(int letter);

/*********************************************************************************/
/**
 * 7 - Segment
 */
#define SEGMENT_0 0xFC
#define SEGMENT_1 0x60
#define SEGMENT_2 0xDA
#define SEGMENT_3 0xF2
#define SEGMENT_4 0x66
#define SEGMENT_5 0xB6
#define SEGMENT_6 0xBE
#define SEGMENT_7 0xE0
#define SEGMENT_8 0xFE
#define SEGMENT_9 0xE6
#define SEGMENT_C 0x9C
#define SEGMENT_F 0x8E
#define SEGMENT_G 0xBC
#define SEGMENT_N 0x2A
#define SEGMENT_T 0x1E
#define SEGMENT_L 0x1C
#define SEGMENT_DOT 0x01
#define SEGMENT_EMPTY 0x00

/*********************************************************************************/
/**
 * LCD
 */
int getLCDLetterCommand(int letter)
{
	// A - Z
	if( letter>='A' && letter <='Z' )
	{
		return 0x41 + letter - 'A';
	
	// a - z
	}else if( letter>='a' && letter <='z' )
	{
		return 0x61 + letter - 'a';
	
	// 0 - 9
	}else if( letter>='0' && letter <='9' )
	{
		return 0x30 + letter - '0';
	}

	// special
	switch(letter)
	{
		case '!': return 0x21;
		case '"': return 0x22;
		case '#': return 0x23;
		case '$': return 0x24;
		case '%': return 0x25;
		case '&': return 0x26;
		case '\'': return 0x27;
		case '(': return 0x28;
		case ')': return 0x29;
		case '*': return 0x2A;
		case '+': return 0x2B;
		case ',': return 0x2C;
		case '-': return 0x2D;
		case '.': return 0x2E;
		case '/': return 0x2F;
		case '^': return 0x4E;
		case '_': return 0x4F;
		case '|': return 0x7C;
		case '{': return 0x7B;
		case '}': return 0x7D;
		case '[': return 0x5B;
		case ']': return 0x5D;
		case ' ': return 0x20;
		case '@': return 0x40;		
		case ':': return 0x3A;
	}
	
	return 0x20; // space
}

#endif

#ifndef __others_c__
#define __others_c__

#include "stm32F10x.h"
#include "stdio.h"

void RCC_Configuration(void);
void GPIO_Configuration(void);
void InitialiteInterrupt(void);
void InitializeUSART(void);
void NVIC_Configuration(void);

/*********************************************************************************/
/**
 * RCC Configuration
 * @author {http://neuron.feld.cvut.cz/micro/stm32/tut-03-usart-irq.html#config}
 * @author {http://mcu.cz/comment-n2122.html}
 */
void RCC_Configuration(void)
{
	FLASH_SetLatency(FLASH_Latency_2);
  	FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);	

	InitialiteInterrupt();
	InitializeUSART();
}

/*********************************************************************************/
/**
 * GPIO configurations 
 * @author {http://neuron.feld.cvut.cz/micro/stm32/tut-03-usart-irq.html} 
 */
void GPIO_Configuration(void)
{  
	GPIO_InitTypeDef init;	
	GPIO_InitTypeDef GPIO_InitStructure;
		 		
	init.GPIO_Speed = GPIO_Speed_10MHz;
	init.GPIO_Mode = GPIO_Mode_Out_PP;

	// Green led	
	init.GPIO_Pin = GPIO_Pin_9;
	GPIO_Init(GPIOC, &init);
	
	// Blue led
	init.GPIO_Pin = GPIO_Pin_8;		  
	GPIO_Init(GPIOC, &init);

  
	  /* Konfigurujeme USART1_Tx jako 'alternate function push-pull' */
	  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
	  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	  GPIO_Init(GPIOA, &GPIO_InitStructure);
	  
	  /* Konfigurujeme USART1_Rx jako 'input floating' */
	  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

/*********************************************************************************/
/**
 * Initialization of interrupt
 * @author {http://mcu.cz/comment-n2119.html} 
 */
void InitialiteInterrupt(void)
{
	SysTick_Config(SystemCoreClock / 1000);
}

/*********************************************************************************/
/**
 * Initialization of interrupt
 * @author {http://neuron.feld.cvut.cz/micro/stm32/tut-02-usart.html} 
 */
void InitializeUSART(void)
{
	USART_InitTypeDef USART_InitStructure;
	USART_InitStructure.USART_BaudRate = 9600;
  	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  	USART_InitStructure.USART_StopBits = USART_StopBits_1;
  	USART_InitStructure.USART_Parity = USART_Parity_No ;
  	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    
	USART_Init(USART1, &USART_InitStructure);
  	USART_Cmd(USART1, ENABLE);

	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
}

/*********************************************************************************/
/**
 * Configuration of NVIC
 * @author {http://neuron.feld.cvut.cz/micro/stm32/tut-03-usart-irq.html} 
 */
void NVIC_Configuration(void)
{

  	NVIC_InitTypeDef NVIC_InitStructure;
    
  	NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);   
    
	NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
  	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  	NVIC_Init(&NVIC_InitStructure);
}      

/*********************************************************************************/
#endif