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/**
******************************************************************************
* @file USB_Host/HID_Standalone/Src/keyboard.c
* @author MCD Application Team
* @brief This file implements the HID keyboard functions
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define KYBRD_FIRST_COLUMN (uint16_t)10
#define KYBRD_LAST_COLUMN (uint16_t)794
#define KYBRD_FIRST_LINE (uint16_t) 80
#define SMALL_FONT_COLUMN_WIDTH 8
#define SMALL_FONT_LINE_WIDTH 20
#define KYBRD_LAST_LINE (uint16_t)320
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
extern HID_DEMO_StateMachine hid_demo;
extern uint8_t *DEMO_KEYBOARD_menu[];
extern uint8_t prev_select;
extern uint32_t hid_demo_ready;
uint16_t KeybrdCharYpos = 0;
uint16_t KeybrdCharXpos = 0;
uint16_t CurrentLastXpos[KYBRD_LAST_LINE] = {0};
/* Private function prototypes -----------------------------------------------*/
static void USR_KEYBRD_Init(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Manages Keyboard Menu Process.
* @param None
* @retval None
*/
void HID_KeyboardMenuProcess(void)
{
switch(hid_demo.keyboard_state)
{
case HID_KEYBOARD_IDLE:
hid_demo.keyboard_state = HID_KEYBOARD_START;
HID_SelectItem(DEMO_KEYBOARD_menu, 0);
hid_demo.select = 0;
prev_select = 0;
break;
case HID_KEYBOARD_WAIT:
if(hid_demo.select != prev_select)
{
prev_select = hid_demo.select;
HID_SelectItem(DEMO_KEYBOARD_menu, hid_demo.select & 0x7F);
/* Handle select item */
if(hid_demo.select & 0x80)
{
hid_demo.select &= 0x7F;
switch(hid_demo.select)
{
case 0:
hid_demo.keyboard_state = HID_KEYBOARD_START;
break;
case 1: /* Return */
LCD_LOG_ClearTextZone();
hid_demo.state = HID_DEMO_REENUMERATE;
hid_demo.select = 0;
break;
default:
break;
}
}
}
break;
case HID_KEYBOARD_START:
USR_KEYBRD_Init();
hid_demo.keyboard_state = HID_KEYBOARD_WAIT;
break;
default:
break;
}
}
/**
* @brief Init Keyboard window.
* @param None
* @retval None
*/
static void USR_KEYBRD_Init(void)
{
LCD_LOG_ClearTextZone();
BSP_LCD_SetTextColor(LCD_COLOR_YELLOW);
BSP_LCD_DisplayStringAtLine(4, (uint8_t *)"Use Keyboard to type characters:");
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
KeybrdCharYpos = KYBRD_FIRST_LINE;
KeybrdCharXpos = KYBRD_FIRST_COLUMN;
}
/**
* @brief Processes Keyboard data.
* @param data: Keyboard data to be displayed
* @retval None
*/
void USR_KEYBRD_ProcessData(uint8_t data)
{
if(data == '\n')
{
KeybrdCharXpos = KYBRD_FIRST_COLUMN;
/* Increment char Y position */
KeybrdCharYpos += SMALL_FONT_LINE_WIDTH;
if(KeybrdCharYpos > KYBRD_LAST_LINE)
{
LCD_LOG_ClearTextZone();
KeybrdCharYpos = KYBRD_FIRST_LINE;
KeybrdCharXpos = KYBRD_FIRST_COLUMN;
}
}
else if(data == '\r')
{
/* Manage deletion of character and update cursor location */
if(KeybrdCharXpos == KYBRD_FIRST_COLUMN)
{
/* First character of first line to be deleted */
if(KeybrdCharYpos == KYBRD_FIRST_LINE)
{
KeybrdCharXpos = KYBRD_FIRST_COLUMN;
}
else
{
KeybrdCharYpos -= SMALL_FONT_LINE_WIDTH;
KeybrdCharXpos = (KYBRD_LAST_COLUMN - SMALL_FONT_COLUMN_WIDTH);
}
}
else
{
if(CurrentLastXpos[KeybrdCharYpos] > KYBRD_FIRST_COLUMN)
{
CurrentLastXpos[KeybrdCharYpos] -= SMALL_FONT_COLUMN_WIDTH;
KeybrdCharXpos = CurrentLastXpos[KeybrdCharYpos];
}
else if(KeybrdCharYpos > KYBRD_FIRST_LINE)
{
KeybrdCharYpos -= SMALL_FONT_LINE_WIDTH;
CurrentLastXpos[KeybrdCharYpos] -= SMALL_FONT_COLUMN_WIDTH;
KeybrdCharXpos = CurrentLastXpos[KeybrdCharYpos];
}
else
{
}
}
BSP_LCD_DisplayChar(CurrentLastXpos[KeybrdCharYpos], KeybrdCharYpos, ' ');
}
else
{
/* Update the cursor position on LCD */
BSP_LCD_DisplayChar(KeybrdCharXpos, KeybrdCharYpos, data);
/* Increment char X position */
KeybrdCharXpos += SMALL_FONT_COLUMN_WIDTH;
CurrentLastXpos[KeybrdCharYpos] = KeybrdCharXpos;
/* Check if the X position has reached the last column */
if(KeybrdCharXpos == KYBRD_LAST_COLUMN)
{
KeybrdCharXpos = KYBRD_FIRST_COLUMN;
/* Increment char Y position */
KeybrdCharYpos += SMALL_FONT_LINE_WIDTH;
}
if(KeybrdCharYpos > KYBRD_LAST_LINE)
{
LCD_LOG_ClearTextZone();
KeybrdCharYpos = KYBRD_FIRST_LINE;
/* Start New Display of the cursor position on LCD */
BSP_LCD_DisplayChar(KeybrdCharXpos,KeybrdCharYpos, data);
}
}
}