这篇来学习测试下LCD显示屏。
一、硬件电路部分
1.1、LCD部分电路图
LCD显示屏和SRAM存储器共用FMC方式驱动，使用的BANK不一样
1.2、显示屏驱动地址
电路图中，LCD_NE使用了PG9引脚控制，从手册上看下PG9的功能，下表看PG9引脚对应的FMC功能
显示屏使用了FMC_NE2
根据手册地址映射的表，算出LCD屏的地址：0x6400 0000
二、驱动程序
2.1、stm32f723e_discovery_lcd.c
/**
******************************************************************************
* [url=home.php?mod=space&uid=1307177]@File[/url] stm32f723e_discovery_lcd.c
* [url=home.php?mod=space&uid=1315547]@author[/url] MCD Application Team
* [url=home.php?mod=space&uid=159083]@brief[/url] This file includes the driver for Liquid Crystal Display (LCD) module
* mounted on STM32F723E-DISCOVERY board.
******************************************************************************
* [url=home.php?mod=space&uid=1020061]@attention[/url] *
* Copyright (c) 2016 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.
*
******************************************************************************
*/
/* File Info : -----------------------------------------------------------------
User NOTES
1. How To use this driver:
--------------------------
- This driver is used to drive indirectly an LCD TFT.
- This driver supports the ST7789H2 LCD.
- The ST7789H2 component driver MUST be included with this driver.
2. Driver description:
---------------------
+ Initialization steps:
o Initialize the LCD using the BSP_LCD_Init() function.
+ Display on LCD
o Clear the hole LCD using BSP_LCD_Clear() function or only one specified string
line using the BSP_LCD_ClearStringLine() function.
o Display a character on the specified line and column using the BSP_LCD_DisplayChar()
function or a complete string line using the BSP_LCD_DisplayStringAtLine() function.
o Display a string line on the specified position (x,y in pixel) and align mode
using the BSP_LCD_DisplayStringAtLine() function.
o Draw and fill a basic shapes (dot, line, rectangle, circle, ellipse, .. bitmap)
on LCD using the available set of functions.
------------------------------------------------------------------------------*/
/* Dependencies
- stm32f723e_discovery.c
- stm32f7xx_hal_gpio.c
- stm32f7xx_hal_sram.c
- stm32f7xx_hal_rcc_ex.h
- st7789h2.c
- fonts.h
- font24.c
- font20.c
- font16.c
- font12.c
- font8.c"
EndDependencies */
/* Includes ------------------------------------------------------------------*/
#include "STM32F723E-Discovery/stm32f723e_discovery_lcd.h"
#include "lcd/fonts/fonts.h"
#include "lcd/fonts/font24.c"
#include "lcd/fonts/font20.c"
#include "lcd/fonts/font16.c"
#include "lcd/fonts/font12.c"
#include "lcd/fonts/font8.c"
/** @addtogroup BSP
* @{
*/
/** @addtogroup STM32F723E_DISCOVERY
* @{
*/
/** @defgroup STM32F723E_DISCOVERY_LCD STM32F723E-DISCOVERY LCD
* @{
*/
/** @defgroup STM32F723E_DISCOVERY_LCD_Private_TypesDefinitions STM32F723E Discovery Lcd Private TypesDef
* @{
*/
/**
* @}
*/
/** @defgroup STM32F723E_DISCOVERY_LCD_Private_Defines STM32F723E Discovery Lcd Private Defines
* @{
*/
#define POLY_X(Z) ((int32_t)((Points + Z)->X))
#define POLY_Y(Z) ((int32_t)((Points + Z)->Y))
/**
* @}
*/
/** @defgroup STM32F723E_DISCOVERY_LCD_Private_Macros STM32F723E Discovery Lcd Private Macros
* @{
*/
#define ABS(X) ((X) > 0 ? (X) : -(X))
/**
* @}
*/
/** @defgroup STM32F723E_DISCOVERY_LCD_Private_Variables STM32F723E Discovery Lcd Private Variables
* @{
*/
LCD_DrawPropTypeDef DrawProp;
static LCD_DrvTypeDef *LcdDrv;
/**
* @}
*/
/** @defgroup STM32F723E_DISCOVERY_LCD_Private_FunctionPrototypes STM32F723E Discovery Lcd Private Prototypes
* @{
*/
static void DrawChar(uint16_t Xpos, uint16_t Ypos, const uint8_t *c);
static void SetDisplayWindow(uint16_t Xpos, uint16_t Ypos, uint16_t Width, uint16_t Height);
static void FillTriangle(uint16_t x1, uint16_t x2, uint16_t x3, uint16_t y1, uint16_t y2, uint16_t y3);
/**
* @}
*/
/** @defgroup STM32F723E_DISCOVERY_LCD_Private_Functions STM32F723E Discovery Lcd Private Functions
* @{
*/
/**
* @brief Initializes the LCD.
* @retval LCD state
*/
uint8_t BSP_LCD_Init(void)
{
return (BSP_LCD_InitEx(LCD_ORIENTATION_LANDSCAPE));
}
/**
* @brief Initializes the LCD with a given orientation.
* @param orientation: LCD_ORIENTATION_PORTRAIT or LCD_ORIENTATION_LANDSCAPE
* @retval LCD state
*/
uint8_t BSP_LCD_InitEx(uint32_t orientation)
{
uint8_t ret = LCD_ERROR;
/* Default value for draw propriety */
DrawProp.BackColor = 0xFFFF;
DrawProp.pFont = &Font24;
DrawProp.TextColor = 0x0000;
/* Initialize LCD special pins GPIOs */
BSP_LCD_MspInit();
/* Backlight control signal assertion */
HAL_GPIO_WritePin(LCD_BL_CTRL_GPIO_PORT, LCD_BL_CTRL_PIN, GPIO_PIN_SET);
/* Apply hardware reset according to procedure indicated in FRD154BP2901 documentation */
HAL_GPIO_WritePin(LCD_RESET_GPIO_PORT, LCD_RESET_PIN, GPIO_PIN_RESET);
HAL_Delay(5); /* Reset signal asserted during 5ms */
HAL_GPIO_WritePin(LCD_RESET_GPIO_PORT, LCD_RESET_PIN, GPIO_PIN_SET);
HAL_Delay(10); /* Reset signal released during 10ms */
HAL_GPIO_WritePin(LCD_RESET_GPIO_PORT, LCD_RESET_PIN, GPIO_PIN_RESET);
HAL_Delay(20); /* Reset signal asserted during 20ms */
HAL_GPIO_WritePin(LCD_RESET_GPIO_PORT, LCD_RESET_PIN, GPIO_PIN_SET);
HAL_Delay(10); /* Reset signal released during 10ms */
if(ST7789H2_drv.ReadID() == ST7789H2_ID)
{
LcdDrv = &ST7789H2_drv;
/* LCD Init */
LcdDrv->Init();
if(orientation == LCD_ORIENTATION_PORTRAIT)
{
ST7789H2_SetOrientation(LCD_ORIENTATION_PORTRAIT);
}
else if(orientation == LCD_ORIENTATION_LANDSCAPE_ROT180)
{
ST7789H2_SetOrientation(LCD_ORIENTATION_LANDSCAPE_ROT180);
}
else
{
/* Default landscape orientation is selected */
}
/* Initialize the font */
BSP_LCD_SetFont(&LCD_DEFAULT_FONT);
ret = LCD_OK;
}
return ret;
}
/**
* @brief DeInitializes the LCD.
* @retval LCD state
*/
uint8_t BSP_LCD_DeInit(void)
{
/* Actually LcdDrv does not provide a DeInit function */
return LCD_OK;
}
/**
* @brief Gets the LCD X size.
* @retval Used LCD X size
*/
uint32_t BSP_LCD_GetXSize(void)
{
return(LcdDrv->GetLcdPixelWidth());
}
/**
* @brief Gets the LCD Y size.
* @retval Used LCD Y size
*/
uint32_t BSP_LCD_GetYSize(void)
{
return(LcdDrv->GetLcdPixelHeight());
}
/**
* @brief Gets the LCD text color.
* @retval Used text color.
*/
uint16_t BSP_LCD_GetTextColor(void)
{
return DrawProp.TextColor;
}
/**
* @brief Gets the LCD background color.
* @retval Used background color
*/
uint16_t BSP_LCD_GetBackColor(void)
{
return DrawProp.BackColor;
}
/**
* @brief Sets the LCD text color.
* @param Color: Text color code RGB(5-6-5)
* @retval None
*/
void BSP_LCD_SetTextColor(uint16_t Color)
{
DrawProp.TextColor = Color;
}
/**
* @brief Sets the LCD background color.
* @param Color: Background color code RGB(5-6-5)
* @retval None
*/
void BSP_LCD_SetBackColor(uint16_t Color)
{
DrawProp.BackColor = Color;
}
/**
* @brief Sets the LCD text font.
* @param fonts: Font to be used
* @retval None
*/
void BSP_LCD_SetFont(sFONT *fonts)
{
DrawProp.pFont = fonts;
}
/**
* @brief Gets the LCD text font.
* @retval Used font
*/
sFONT *BSP_LCD_GetFont(void)
{
return DrawProp.pFont;
}
/**
* @brief Clears the hole LCD.
* @param Color: Color of the background
* @retval None
*/
void BSP_LCD_Clear(uint16_t Color)
{
uint32_t counter = 0;
uint32_t y_size = 0;
uint32_t color_backup = DrawProp.TextColor;
DrawProp.TextColor = Color;
y_size = BSP_LCD_GetYSize();
for(counter = 0; counter < y_size; counter++)
{
BSP_LCD_DrawHLine(0, counter, BSP_LCD_GetXSize());
}
DrawProp.TextColor = color_backup;
BSP_LCD_SetTextColor(DrawProp.TextColor);
}
/**
* @brief Clears the selected line.
* @param Line: Line to be cleared
* This parameter can be one of the following values:
* @arg 0..9: if the Current fonts is Font16x24
* @arg 0..19: if the Current fonts is Font12x12 or Font8x12
* @arg 0..29: if the Current fonts is Font8x8
* @retval None
*/
void BSP_LCD_ClearStringLine(uint16_t Line)
{
uint32_t color_backup = DrawProp.TextColor;
DrawProp.TextColor = DrawProp.BackColor;
/* Draw a rectangle with background color */
BSP_LCD_FillRect(0, (Line * DrawProp.pFont->Height), BSP_LCD_GetXSize(), DrawProp.pFont->Height);
DrawProp.TextColor = color_backup;
BSP_LCD_SetTextColor(DrawProp.TextColor);
}
/**
* @brief Displays one character.
* @param Xpos: Start column address
* @param Ypos: Line where to display the character shape.
* @param Ascii: Character ascii code
* This parameter must be a number between Min_Data = 0x20 and Max_Data = 0x7E
* @retval None
*/
void BSP_LCD_DisplayChar(uint16_t Xpos, uint16_t Ypos, uint8_t Ascii)
{
DrawChar(Xpos, Ypos, &DrawProp.pFont->table[(Ascii-' ') *\
DrawProp.pFont->Height * ((DrawProp.pFont->Width + 7) / 8)]);
}
/**
* @brief Displays characters on the LCD.
* @param Xpos: X position (in pixel)
* @param Ypos: Y position (in pixel)
* @param Text: Pointer to string to display on LCD
* @param Mode: Display mode
* This parameter can be one of the following values:
* @arg CENTER_MODE
* @arg RIGHT_MODE
* @arg LEFT_MODE
* @retval None
*/
void BSP_LCD_DisplayStringAt(uint16_t Xpos, uint16_t Ypos, uint8_t *Text, Line_ModeTypdef Mode)
{
uint16_t refcolumn = 1, i = 0;
uint32_t size = 0, xsize = 0;
uint8_t *ptr = Text;
/* Get the text size */
while (*ptr++) size ++ ;
/* Characters number per line */
xsize = (BSP_LCD_GetXSize()/DrawProp.pFont->Width);
switch (Mode)
{
case CENTER_MODE:
{
refcolumn = Xpos + ((xsize - size)* DrawProp.pFont->Width) / 2;
break;
}
case LEFT_MODE:
{
refcolumn = Xpos;
break;
}
case RIGHT_MODE:
{
refcolumn = - Xpos + ((xsize - size)*DrawProp.pFont->Width);
break;
}
default:
{
refcolumn = Xpos;
break;
}
}
/* Check that the Start column is located in the screen */
if ((refcolumn < 1) || (refcolumn >= 0x8000))
{
refcolumn = 1;
}
/* Send the string character by character on lCD */
while ((*Text != 0) & (((BSP_LCD_GetXSize() - (i*DrawProp.pFont->Width)) & 0xFFFF) >= DrawProp.pFont->Width))
{
/* Display one character on LCD */
BSP_LCD_DisplayChar(refcolumn, Ypos, *Text);
/* Decrement the column position by 16 */
refcolumn += DrawProp.pFont->Width;
/* Point on the next character */
Text++;
i++;
}
}
/**
* @brief Displays a character on the LCD.
* @param Line: Line where to display the character shape
* This parameter can be one of the following values:
* @arg 0..9: if the Current fonts is Font16x24
* @arg 0..19: if the Current fonts is Font12x12 or Font8x12
* @arg 0..29: if the Current fonts is Font8x8
* @param ptr: Pointer to string to display on LCD
* @retval None
*/
void BSP_LCD_DisplayStringAtLine(uint16_t Line, uint8_t *ptr)
{
BSP_LCD_DisplayStringAt(0, LINE(Line), ptr, LEFT_MODE);
}
/**
* @brief Reads an LCD pixel.
* @param Xpos: X position
* @param Ypos: Y position
* @retval RGB pixel color
*/
uint16_t BSP_LCD_ReadPixel(uint16_t Xpos, uint16_t Ypos)
{
uint16_t ret = 0;
if(LcdDrv->ReadPixel != NULL)
{
ret = LcdDrv->ReadPixel(Xpos, Ypos);
}
return ret;
}
/**
* @brief Draws a pixel on LCD.
* @param Xpos: X position
* @param Ypos: Y position
* @param RGB_Code: Pixel color in RGB mode (5-6-5)
* @retval None
*/
void BSP_LCD_DrawPixel(uint16_t Xpos, uint16_t Ypos, uint16_t RGB_Code)
{
if(LcdDrv->WritePixel != NULL)
{
LcdDrv->WritePixel(Xpos, Ypos, RGB_Code);
}
}
/**
* @brief Draws an horizontal line.
* @param Xpos: X position
* @param Ypos: Y position
* @param Length: Line length
* @retval None
*/
void BSP_LCD_DrawHLine(uint16_t Xpos, uint16_t Ypos, uint16_t Length)
{
uint32_t index = 0;
if(LcdDrv->DrawHLine != NULL)
{
LcdDrv->DrawHLine(DrawProp.TextColor, Xpos, Ypos, Length);
}
else
{
for(index = 0; index < Length; index++)
{
BSP_LCD_DrawPixel((Xpos + index), Ypos, DrawProp.TextColor);
}
}
}
/**
* @brief Draws a vertical line.
* @param Xpos: X position
* @param Ypos: Y position
* @param Length: Line length
* @retval None
*/
void BSP_LCD_DrawVLine(uint16_t Xpos, uint16_t Ypos, uint16_t Length)
{
uint32_t index = 0;
if(LcdDrv->DrawVLine != NULL)
{
LcdDrv->DrawVLine(DrawProp.TextColor, Xpos, Ypos, Length);
}
else
{
for(index = 0; index < Length; index++)
{
BSP_LCD_DrawPixel(Xpos, Ypos + index, DrawProp.TextColor);
}
}
}
/**
* @brief Draws an uni-line (between two points).
* @param x1: Point 1 X position
* @param y1: Point 1 Y position
* @param x2: Point 2 X position
* @param y2: Point 2 Y position
* @retval None
*/
void BSP_LCD_DrawLine(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
{
int16_t deltax = 0, deltay = 0, x = 0, y = 0, xinc1 = 0, xinc2 = 0,
yinc1 = 0, yinc2 = 0, den = 0, num = 0, numadd = 0, numpixels = 0,
curpixel = 0;
deltax = ABS(x2 - x1); /* The difference between the x's */
deltay = ABS(y2 - y1); /* The difference between the y's */
x = x1; /* Start x off at the first pixel */
y = y1; /* Start y off at the first pixel */
if (x2 >= x1) /* The x-values are increasing */
{
xinc1 = 1;
xinc2 = 1;
}
else /* The x-values are decreasing */
{
xinc1 = -1;
xinc2 = -1;
}
if (y2 >= y1) /* The y-values are increasing */
{
yinc1 = 1;
yinc2 = 1;
}
else /* The y-values are decreasing */
{
yinc1 = -1;
yinc2 = -1;
}
if (deltax >= deltay) /* There is at least one x-value for every y-value */
{
xinc1 = 0; /* Don't change the x when numerator >= denominator */
yinc2 = 0; /* Don't change the y for every iteration */
den = deltax;
num = deltax / 2;
numadd = deltay;
numpixels = deltax; /* There are more x-values than y-values */
}
else /* There is at least one y-value for every x-value */
{
xinc2 = 0; /* Don't change the x for every iteration */
yinc1 = 0; /* Don't change the y when numerator >= denominator */
den = deltay;
num = deltay / 2;
numadd = deltax;
numpixels = deltay; /* There are more y-values than x-values */
}
for (curpixel = 0; curpixel <= numpixels; curpixel++)
{
BSP_LCD_DrawPixel(x, y, DrawProp.TextColor); /* Draw the current pixel */
num += numadd; /* Increase the numerator by the top of the fraction */
if (num >= den) /* Check if numerator >= denominator */
{
num -= den; /* Calculate the new numerator value */
x += xinc1; /* Change the x as appropriate */
y += yinc1; /* Change the y as appropriate */
}
x += xinc2; /* Change the x as appropriate */
y += yinc2; /* Change the y as appropriate */
}
}
/**
* @brief Draws a rectangle.
* @param Xpos: X position
* @param Ypos: Y position
* @param Width: Rectangle width
* @param Height: Rectangle height
* @retval None
*/
void BSP_LCD_DrawRect(uint16_t Xpos, uint16_t Ypos, uint16_t Width, uint16_t Height)
{
/* Draw horizontal lines */
BSP_LCD_DrawHLine(Xpos, Ypos, Width);
BSP_LCD_DrawHLine(Xpos, (Ypos+ Height), Width);
/* Draw vertical lines */
BSP_LCD_DrawVLine(Xpos, Ypos, Height);
BSP_LCD_DrawVLine((Xpos + Width), Ypos, Height);
}
/**
* @brief Draws a circle.
* @param Xpos: X position
* @param Ypos: Y position
* @param Radius: Circle radius
* @retval None
*/
void BSP_LCD_DrawCircle(uint16_t Xpos, uint16_t Ypos, uint16_t Radius)
{
int32_t decision; /* Decision Variable */
uint32_t current_x; /* Current X Value */
uint32_t current_y; /* Current Y Value */
decision = 3 - (Radius << 1);
current_x = 0;
current_y = Radius;
while (current_x <= current_y)
{
BSP_LCD_DrawPixel((Xpos + current_x), (Ypos - current_y), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos - current_x), (Ypos - current_y), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos + current_y), (Ypos - current_x), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos - current_y), (Ypos - current_x), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos + current_x), (Ypos + current_y), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos - current_x), (Ypos + current_y), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos + current_y), (Ypos + current_x), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos - current_y), (Ypos + current_x), DrawProp.TextColor);
/* Initialize the font */
BSP_LCD_SetFont(&LCD_DEFAULT_FONT);
if (decision < 0)
{
decision += (current_x << 2) + 6;
}
else
{
decision += ((current_x - current_y) << 2) + 10;
current_y--;
}
current_x++;
}
}
/**
* @brief Draws an poly-line (between many points).
* @param Points: Pointer to the points array
* @param PointCount: Number of points
* @retval None
*/
void BSP_LCD_DrawPolygon(pPoint Points, uint16_t PointCount)
{
int16_t x = 0, y = 0;
if(PointCount < 2)
{
return;
}
BSP_LCD_DrawLine(Points->X, Points->Y, (Points+PointCount-1)->X, (Points+PointCount-1)->Y);
while(--PointCount)
{
x = Points->X;
y = Points->Y;
Points++;
BSP_LCD_DrawLine(x, y, Points->X, Points->Y);
}
}
/**
* @brief Draws an ellipse on LCD.
* @param Xpos: X position
* @param Ypos: Y position
* @param XRadius: Ellipse X radius
* @param YRadius: Ellipse Y radius
* @retval None
*/
void BSP_LCD_DrawEllipse(int Xpos, int Ypos, int XRadius, int YRadius)
{
int x = 0, y = -YRadius, err = 2-2*XRadius, e2;
float k = 0, rad1 = 0, rad2 = 0;
rad1 = XRadius;
rad2 = YRadius;
k = (float)(rad2/rad1);
do {
BSP_LCD_DrawPixel((Xpos-(uint16_t)(x/k)), (Ypos+y), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos+(uint16_t)(x/k)), (Ypos+y), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos+(uint16_t)(x/k)), (Ypos-y), DrawProp.TextColor);
BSP_LCD_DrawPixel((Xpos-(uint16_t)(x/k)), (Ypos-y), DrawProp.TextColor);
e2 = err;
if (e2 <= x) {
err += ++x*2+1;
if (-y == x && e2 <= y) e2 = 0;
}
if (e2 > y) err += ++y*2+1;
}
while (y <= 0);
}
/**
* @brief Draws a bitmap picture (16 bpp).
* @param Xpos: Bmp X position in the LCD
* @param Ypos: Bmp Y position in the LCD
* @param pbmp: Pointer to Bmp picture address.
* @retval None
*/
void BSP_LCD_DrawBitmap(uint16_t Xpos, uint16_t Ypos, uint8_t *pbmp)
{
uint32_t height = 0;
uint32_t width = 0;
/* Read bitmap width */
width = pbmp[18] + (pbmp[19] << 8) + (pbmp[20] << 16) + (pbmp[21] << 24);
/* Read bitmap height */
height = pbmp[22] + (pbmp[23] << 8) + (pbmp[24] << 16) + (pbmp[25] << 24);
SetDisplayWindow(Xpos, Ypos, width, height);
if(LcdDrv->DrawBitmap != NULL)
{
LcdDrv->DrawBitmap(Xpos, Ypos, pbmp);
}
SetDisplayWindow(0, 0, BSP_LCD_GetXSize(), BSP_LCD_GetYSize());
}
/**
* @brief Draws RGB Image (16 bpp).
* @param Xpos: X position in the LCD
* @param Ypos: Y position in the LCD
* @param Xsize: X size in the LCD
* @param Ysize: Y size in the LCD
* @param pdata: Pointer to the RGB Image address.
* @retval None
*/
void BSP_LCD_DrawRGBImage(uint16_t Xpos, uint16_t Ypos, uint16_t Xsize, uint16_t Ysize, uint8_t *pdata)
{
SetDisplayWindow(Xpos, Ypos, Xsize, Ysize);
if(LcdDrv->DrawRGBImage != NULL)
{
LcdDrv->DrawRGBImage(Xpos, Ypos, Xsize, Ysize, pdata);
}
SetDisplayWindow(0, 0, BSP_LCD_GetXSize(), BSP_LCD_GetYSize());
}
/**
* @brief Draws a full rectangle.
* @param Xpos: X position
* @param Ypos: Y position
* @param Width: Rectangle width
* @param Height: Rectangle height
* @retval None
*/
void BSP_LCD_FillRect(uint16_t Xpos, uint16_t Ypos, uint16_t Width, uint16_t Height)
{
BSP_LCD_SetTextColor(DrawProp.TextColor);
do
{
BSP_LCD_DrawHLine(Xpos, Ypos++, Width);
}
while(Height--);
}
/**
* @brief Draws a full circle.
* @param Xpos: X position
* @param Ypos: Y position
* @param Radius: Circle radius
* @retval None
*/
void BSP_LCD_FillCircle(uint16_t Xpos, uint16_t Ypos, uint16_t Radius)
{
int32_t decision; /* Decision Variable */
uint32_t current_x; /* Current X Value */
uint32_t current_y; /* Current Y Value */
decision = 3 - (Radius << 1);
current_x = 0;
current_y = Radius;
BSP_LCD_SetTextColor(DrawProp.TextColor);
while (current_x <= current_y)
{
if(current_y > 0)
{
BSP_LCD_DrawHLine(Xpos - current_y, Ypos + current_x, 2*current_y);
BSP_LCD_DrawHLine(Xpos - current_y, Ypos - current_x, 2*current_y);
}
if(current_x > 0)
{
BSP_LCD_DrawHLine(Xpos - current_x, Ypos - current_y, 2*current_x);
BSP_LCD_DrawHLine(Xpos - current_x, Ypos + current_y, 2*current_x);
}
if (decision < 0)
{
decision += (current_x << 2) + 6;
}
else
{
decision += ((current_x - current_y) << 2) + 10;
current_y--;
}
current_x++;
}
BSP_LCD_SetTextColor(DrawProp.TextColor);
BSP_LCD_DrawCircle(Xpos, Ypos, Radius);
}
/**
* @brief Draws a full poly-line (between many points).
* @param Points: Pointer to the points array
* @param PointCount: Number of points
* @retval None
*/
void BSP_LCD_FillPolygon(pPoint Points, uint16_t PointCount)
{
int16_t X = 0, Y = 0, X2 = 0, Y2 = 0, X_center = 0, Y_center = 0, X_first = 0, Y_first = 0, pixelX = 0, pixelY = 0, counter = 0;
uint16_t IMAGE_LEFT = 0, IMAGE_RIGHT = 0, IMAGE_TOP = 0, IMAGE_BOTTOM = 0;
IMAGE_LEFT = IMAGE_RIGHT = Points->X;
IMAGE_TOP= IMAGE_BOTTOM = Points->Y;
for(counter = 1; counter < PointCount; counter++)
{
pixelX = POLY_X(counter);
if(pixelX < IMAGE_LEFT)
{
IMAGE_LEFT = pixelX;
}
if(pixelX > IMAGE_RIGHT)
{
IMAGE_RIGHT = pixelX;
}
pixelY = POLY_Y(counter);
if(pixelY < IMAGE_TOP)
{
IMAGE_TOP = pixelY;
}
if(pixelY > IMAGE_BOTTOM)
{
IMAGE_BOTTOM = pixelY;
}
}
if(PointCount < 2)
{
return;
}
X_center = (IMAGE_LEFT + IMAGE_RIGHT)/2;
Y_center = (IMAGE_BOTTOM + IMAGE_TOP)/2;
X_first = Points->X;
Y_first = Points->Y;
while(--PointCount)
{
X = Points->X;
Y = Points->Y;
Points++;
X2 = Points->X;
Y2 = Points->Y;
FillTriangle(X, X2, X_center, Y, Y2, Y_center);
FillTriangle(X, X_center, X2, Y, Y_center, Y2);
FillTriangle(X_center, X2, X, Y_center, Y2, Y);
}
FillTriangle(X_first, X2, X_center, Y_first, Y2, Y_center);
FillTriangle(X_first, X_center, X2, Y_first, Y_center, Y2);
FillTriangle(X_center, X2, X_first, Y_center, Y2, Y_first);
}
/**
* @brief Draws a full ellipse.
* @param Xpos: X position
* @param Ypos: Y position
* @param XRadius: Ellipse X radius
* @param YRadius: Ellipse Y radius
* @retval None
*/
void BSP_LCD_FillEllipse(int Xpos, int Ypos, int XRadius, int YRadius)
{
int x = 0, y = -YRadius, err = 2-2*XRadius, e2;
float k = 0, rad1 = 0, rad2 = 0;
rad1 = XRadius;
rad2 = YRadius;
k = (float)(rad2/rad1);
do
{
BSP_LCD_DrawHLine((Xpos-(uint16_t)(x/k)), (Ypos+y), (2*(uint16_t)(x/k) + 1));
BSP_LCD_DrawHLine((Xpos-(uint16_t)(x/k)), (Ypos-y), (2*(uint16_t)(x/k) + 1));
e2 = err;
if (e2 <= x)
{
err += ++x*2+1;
if (-y == x && e2 <= y) e2 = 0;
}
if (e2 > y) err += ++y*2+1;
}
while (y <= 0);
}
/**
* @brief Enables the display.
* @retval None
*/
void BSP_LCD_DisplayOn(void)
{
LcdDrv->DisplayOn();
}
/**
* @brief Disables the display.
* @retval None
*/
void BSP_LCD_DisplayOff(void)
{
LcdDrv->DisplayOff();
}
/**
* @brief Initializes the LCD GPIO special pins MSP.
* @retval None
*/
__weak void BSP_LCD_MspInit(void)
{
GPIO_InitTypeDef gpio_init_structure;
/* Enable GPIOs clock */
LCD_RESET_GPIO_CLK_ENABLE();
LCD_TE_GPIO_CLK_ENABLE();
LCD_BL_CTRL_GPIO_CLK_ENABLE();
/* LCD_RESET GPIO configuration */
gpio_init_structure.Pin = LCD_RESET_PIN; /* LCD_RESET pin has to be manually controlled */
gpio_init_structure.Pull = GPIO_NOPULL;
gpio_init_structure.Speed = GPIO_SPEED_FAST;
gpio_init_structure.Mode = GPIO_MODE_OUTPUT_PP;
HAL_GPIO_Init(LCD_RESET_GPIO_PORT, &gpio_init_structure);
HAL_GPIO_WritePin( LCD_RESET_GPIO_PORT, LCD_RESET_PIN, GPIO_PIN_RESET);
/* LCD_TE GPIO configuration */
gpio_init_structure.Pin = LCD_TE_PIN; /* LCD_TE pin has to be manually managed */
gpio_init_structure.Mode = GPIO_MODE_INPUT;
HAL_GPIO_Init(LCD_TE_GPIO_PORT, &gpio_init_structure);
/* LCD_BL_CTRL GPIO configuration */
gpio_init_structure.Pin = LCD_BL_CTRL_PIN; /* LCD_BL_CTRL pin has to be manually controlled */
gpio_init_structure.Mode = GPIO_MODE_OUTPUT_PP;
gpio_init_structure.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LCD_BL_CTRL_GPIO_PORT, &gpio_init_structure);
}
/**
* @brief DeInitializes LCD GPIO special pins MSP.
* @retval None
*/
__weak void BSP_LCD_MspDeInit(void)
{
GPIO_InitTypeDef gpio_init_structure;
/* LCD_RESET GPIO deactivation */
gpio_init_structure.Pin = LCD_RESET_PIN;
HAL_GPIO_DeInit(LCD_RESET_GPIO_PORT, gpio_init_structure.Pin);
/* LCD_TE GPIO deactivation */
gpio_init_structure.Pin = LCD_TE_PIN;
HAL_GPIO_DeInit(LCD_TE_GPIO_PORT, gpio_init_structure.Pin);
/* LCD_BL_CTRL GPIO deactivation */
gpio_init_structure.Pin = LCD_BL_CTRL_PIN;
HAL_GPIO_DeInit(LCD_BL_CTRL_GPIO_PORT, gpio_init_structure.Pin);
/* GPIO pins clock can be shut down in the application
by surcharging this __weak function */
}
/******************************************************************************
Static Functions
*******************************************************************************/
/**
* @brief Draws a character on LCD.
* @param Xpos: Line where to display the character shape
* @param Ypos: Start column address
* @param c: Pointer to the character data
* @retval None
*/
static void DrawChar(uint16_t Xpos, uint16_t Ypos, const uint8_t *c)
{
uint32_t i = 0, j = 0;
uint16_t height, width;
uint8_t offset;
uint8_t *pchar;
uint32_t line;
height = DrawProp.pFont->Height;
width = DrawProp.pFont->Width;
offset = 8 *((width + 7)/8) - width ;
for(i = 0; i < height; i++)
{
pchar = ((uint8_t *)c + (width + 7)/8 * i);
switch(((width + 7)/8))
{
case 1:
line = pchar[0];
break;
case 2:
line = (pchar[0]<< 8) | pchar[1];
break;
case 3:
default:
line = (pchar[0]<< 16) | (pchar[1]<< 8) | pchar[2];
break;
}
for (j = 0; j < width; j++)
{
if(line & (1 << (width- j + offset- 1)))
{
BSP_LCD_DrawPixel((Xpos + j), Ypos, DrawProp.TextColor);
}
else
{
BSP_LCD_DrawPixel((Xpos + j), Ypos, DrawProp.BackColor);
}
}
Ypos++;
}
}
/**
* @brief Sets display window.
* @param Xpos: LCD X position
* @param Ypos: LCD Y position
* @param Width: LCD window width
* @param Height: LCD window height
* @retval None
*/
static void SetDisplayWindow(uint16_t Xpos, uint16_t Ypos, uint16_t Width, uint16_t Height)
{
if(LcdDrv->SetDisplayWindow != NULL)
{
LcdDrv->SetDisplayWindow(Xpos, Ypos, Width, Height);
}
}
/**
* @brief Fills a triangle (between 3 points).
* @param x1: Point 1 X position
* @param y1: Point 1 Y position
* @param x2: Point 2 X position
* @param y2: Point 2 Y position
* @param x3: Point 3 X position
* @param y3: Point 3 Y position
* @retval None
*/
static void FillTriangle(uint16_t x1, uint16_t x2, uint16_t x3, uint16_t y1, uint16_t y2, uint16_t y3)
{
int16_t deltax = 0, deltay = 0, x = 0, y = 0, xinc1 = 0, xinc2 = 0,
yinc1 = 0, yinc2 = 0, den = 0, num = 0, numadd = 0, numpixels = 0,
curpixel = 0;
deltax = ABS(x2 - x1); /* The difference between the x's */
deltay = ABS(y2 - y1); /* The difference between the y's */
x = x1; /* Start x off at the first pixel */
y = y1; /* Start y off at the first pixel */
if (x2 >= x1) /* The x-values are increasing */
{
xinc1 = 1;
xinc2 = 1;
}
else /* The x-values are decreasing */
{
xinc1 = -1;
xinc2 = -1;
}
if (y2 >= y1) /* The y-values are increasing */
{
yinc1 = 1;
yinc2 = 1;
}
else /* The y-values are decreasing */
{
yinc1 = -1;
yinc2 = -1;
}
if (deltax >= deltay) /* There is at least one x-value for every y-value */
{
xinc1 = 0; /* Don't change the x when numerator >= denominator */
yinc2 = 0; /* Don't change the y for every iteration */
den = deltax;
num = deltax / 2;
numadd = deltay;
numpixels = deltax; /* There are more x-values than y-values */
}
else /* There is at least one y-value for every x-value */
{
xinc2 = 0; /* Don't change the x for every iteration */
yinc1 = 0; /* Don't change the y when numerator >= denominator */
den = deltay;
num = deltay / 2;
numadd = deltax;
numpixels = deltay; /* There are more y-values than x-values */
}
for (curpixel = 0; curpixel <= numpixels; curpixel++)
{
BSP_LCD_DrawLine(x, y, x3, y3);
num += numadd; /* Increase the numerator by the top of the fraction */
if (num >= den) /* Check if numerator >= denominator */
{
num -= den; /* Calculate the new numerator value */
x += xinc1; /* Change the x as appropriate */
y += yinc1; /* Change the y as appropriate */
}
x += xinc2; /* Change the x as appropriate */
y += yinc2; /* Change the y as appropriate */
}
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
2.2、lcd.c
#include "lcd/lcd.h"
typedef struct
{
__IO uint16_t REG;
__IO uint16_t RAM;
}LCD_CONTROLLER_TypeDef;
/* We use BANK2 as we use FMC_NE2 signal */
#define FMC_BANK2_BASE ((uint32_t)(0x60000000 | 0x04000000))
#define FMC_BANK2 ((LCD_CONTROLLER_TypeDef *) FMC_BANK2_BASE)
/*******************************************************************************
LINK OPERATIONS
*******************************************************************************/
/*************************** FMC Routines *************************************/
/**
* @brief Initializes FMC_BANK2 MSP.
* @retval None
*/
static void FMC_BANK2_MspInit(void)
{
GPIO_InitTypeDef gpio_init_structure;
/* Enable FMC clock */
__HAL_RCC_FMC_CLK_ENABLE();
/* Enable FSMC clock */
__HAL_RCC_FMC_CLK_ENABLE();
__HAL_RCC_FMC_FORCE_RESET();
__HAL_RCC_FMC_RELEASE_RESET();
/* Enable GPIOs clock */
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
/* Common GPIO configuration */
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Pull = GPIO_PULLUP;
gpio_init_structure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
gpio_init_structure.Alternate = GPIO_AF12_FMC;
/* GPIOD configuration */
/* LCD_PSRAM_D2, LCD_PSRAM_D3, LCD_PSRAM_NOE, LCD_PSRAM_NWE, PSRAM_NE1, LCD_PSRAM_D13,
LCD_PSRAM_D14, LCD_PSRAM_D15, PSRAM_A16, PSRAM_A17, LCD_PSRAM_D0, LCD_PSRAM_D1 */
gpio_init_structure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_7 | GPIO_PIN_8 |\
GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_14 | GPIO_PIN_15;
HAL_GPIO_Init(GPIOD, &gpio_init_structure);
/* GPIOE configuration */
/* PSRAM_NBL0, PSRAM_NBL1, LCD_PSRAM_D4, LCD_PSRAM_D5, LCD_PSRAM_D6, LCD_PSRAM_D7,
LCD_PSRAM_D8, LCD_PSRAM_D9, LCD_PSRAM_D10, LCD_PSRAM_D11, LCD_PSRAM_D12 */
gpio_init_structure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_7 | GPIO_PIN_8 | GPIO_PIN_9 |GPIO_PIN_10 |\
GPIO_PIN_11 | GPIO_PIN_12 |GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
HAL_GPIO_Init(GPIOE, &gpio_init_structure);
/* GPIOF configuration */
/* PSRAM_A0, PSRAM_A1, PSRAM_A2, PSRAM_A3, PSRAM_A4, PSRAM_A5,
PSRAM_A6, PSRAM_A7, PSRAM_A8, PSRAM_A9 */
gpio_init_structure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5 |\
GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
HAL_GPIO_Init(GPIOF, &gpio_init_structure);
/* GPIOG configuration */
/* PSRAM_A10, PSRAM_A11, PSRAM_A12, PSRAM_A13, PSRAM_A14, PSRAM_A15, LCD_NE */
gpio_init_structure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5 |\
GPIO_PIN_9 ;
HAL_GPIO_Init(GPIOG, &gpio_init_structure);
}
/**
* @brief Initializes LCD IO.
* @retval None
*/
static void FMC_BANK2_Init(void)
{
SRAM_HandleTypeDef hsram;
FMC_NORSRAM_TimingTypeDef sram_timing;
/* GPIO configuration for FMC signals (LCD) */
FMC_BANK2_MspInit();
/* PSRAM device configuration */
hsram.Instance = FMC_NORSRAM_DEVICE;
hsram.Extended = FMC_NORSRAM_EXTENDED_DEVICE;
/* Set parameters for LCD access (FMC_NORSRAM_BANK2) */
hsram.Init.NSBank = FMC_NORSRAM_BANK2;
hsram.Init.DataAddressMux = FMC_DATA_ADDRESS_MUX_DISABLE;
hsram.Init.MemoryType = FMC_MEMORY_TYPE_SRAM;
hsram.Init.MemoryDataWidth = FMC_NORSRAM_MEM_BUS_WIDTH_16;
hsram.Init.BurstAccessMode = FMC_BURST_ACCESS_MODE_DISABLE;
hsram.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW;
hsram.Init.WaitSignalActive = FMC_WAIT_TIMING_BEFORE_WS;
hsram.Init.WriteOperation = FMC_WRITE_OPERATION_ENABLE;
hsram.Init.WaitSignal = FMC_WAIT_SIGNAL_DISABLE;
hsram.Init.ExtendedMode = FMC_EXTENDED_MODE_DISABLE;
hsram.Init.AsynchronousWait = FMC_ASYNCHRONOUS_WAIT_DISABLE;
hsram.Init.WriteBurst = FMC_WRITE_BURST_DISABLE;
hsram.Init.WriteFifo = FMC_WRITE_FIFO_DISABLE;
hsram.Init.PageSize = FMC_PAGE_SIZE_NONE;
hsram.Init.ContinuousClock = FMC_CONTINUOUS_CLOCK_SYNC_ONLY;
/* PSRAM device configuration */
/* Timing configuration derived from system clock (up to 216Mhz)
for 108Mhz as PSRAM clock frequency */
sram_timing.AddressSetupTime = 9;
sram_timing.AddressHoldTime = 2;
sram_timing.DataSetupTime = 6;
sram_timing.BusTurnAroundDuration = 1;
sram_timing.CLKDivision = 2;
sram_timing.DataLatency = 2;
sram_timing.AccessMode = FMC_ACCESS_MODE_A;
/* Initialize the FMC controller for LCD (FMC_NORSRAM_BANK2) */
HAL_SRAM_Init(&hsram, &sram_timing, &sram_timing);
}
/**
* @brief Writes register value.
* @param Data: Data to be written
* @retval None
*/
static void FMC_BANK2_WriteData(uint16_t Data)
{
/* Write 16-bit Reg */
FMC_BANK2->RAM = Data;
__DSB();
}
/**
* @brief Writes register address.
* @param Reg: Register to be written
* @retval None
*/
static void FMC_BANK2_WriteReg(uint8_t Reg)
{
/* Write 16-bit Index, then write register */
FMC_BANK2->REG = Reg;
__DSB();
}
/**
* @brief Reads register value.
* @retval Read value
*/
static uint16_t FMC_BANK2_ReadData(void)
{
return FMC_BANK2->RAM;
}
/*******************************************************************************
LINK OPERATIONS
*******************************************************************************/
/********************************* LINK LCD ***********************************/
/**
* @brief Initializes LCD low level.
* @retval None
*/
void LCD_IO_Init(void)
{
FMC_BANK2_Init();
}
/**
* @brief Writes data on LCD data register.
* @param RegValue: Register value to be written
* @retval None
*/
void LCD_IO_WriteData(uint16_t RegValue)
{
/* Write 16-bit Reg */
FMC_BANK2_WriteData(RegValue);
__DSB();
}
/**
* @brief Writes several data on LCD data register.
* @param pData: pointer on data to be written
* @param Size: data amount in 16bits short unit
* @retval None
*/
void LCD_IO_WriteMultipleData(uint16_t *pData, uint32_t Size)
{
uint32_t i;
for (i = 0; i < Size; i++)
{
FMC_BANK2_WriteData(pData[i]);
__DSB();
}
}
/**
* @brief Writes register on LCD register.
* @param Reg: Register to be written
* @retval None
*/
void LCD_IO_WriteReg(uint8_t Reg)
{
/* Write 16-bit Index, then Write Reg */
FMC_BANK2_WriteReg(Reg);
__DSB();
}
/**
* @brief Reads data from LCD data register.
* @retval Read data.
*/
uint16_t LCD_IO_ReadData(void)
{
return FMC_BANK2_ReadData();
}
/**
* @brief LCD delay
* @param Delay: Delay in ms
* @retval None
*/
void LCD_IO_Delay(uint32_t Delay)
{
HAL_Delay(Delay);
}
2.3、main.c
int main(void)
{
uint8_t i=0;
MPU_Config(); /* Configure the MPU attributes */
CPU_CACHE_Enable(); /* Enable the CPU Cache */
HAL_Init();
SystemClock_Config(); /* Configure the system clock to 216 MHz */
delay_init(216);
led_init();
usart_init(115200);
LED5(0);
LED6(1);
BSP_LCD_Init();
while (1)
{
switch (i)
{
case 0:
BSP_LCD_Clear(LCD_COLOR_RED);
break;
case 1:
BSP_LCD_Clear(LCD_COLOR_GREEN);
break;
case 2:
BSP_LCD_Clear(LCD_COLOR_BLUE);
break;
default:
break;
}
BSP_LCD_SetFont(&Font24);
BSP_LCD_SetTextColor(LCD_COLOR_GRAY);
BSP_LCD_SetBackColor(LCD_COLOR_BLACK );
BSP_LCD_DisplayStringAt(0, 0, "LCD TEST", CENTER_MODE);
BSP_LCD_SetFont(&Font16);
BSP_LCD_SetTextColor(LCD_COLOR_YELLOW);
BSP_LCD_DisplayStringAt(0, 48, "STM32F723", LEFT_MODE);
BSP_LCD_SetFont(&Font16);
BSP_LCD_SetTextColor(LCD_COLOR_MAGENTA);
BSP_LCD_DisplayStringAt(0, 72, "www.eeworld.com.cn", LEFT_MODE);
LED6_TOGGLE();
HAL_Delay(1000);
i++;
if(i>3)
{
i=0;
}
}
}
三、运行结果
烧写程序后，复位开发板，屏幕显示
lcd
提升卡
变色卡
千斤顶
1/7 
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