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/*******************************************************************************
*
* hal_lcd.c
*
* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************/
#include "contiki-conf.h"
#include "core/sys/cc.h"
#include "hal_MSP-EXP430F5438.h"
#include "hal_lcd_fonts.h"
unsigned char LcdInitMacro[] = {
0x74, 0x00, 0x00, 0x76, 0x00, 0x01, // R00 start oscillation
0x74, 0x00, 0x01, 0x76, 0x00, 0x0D, // R01 driver output control
0x74, 0x00, 0x02, 0x76, 0x00, 0x4C, // R02 LCD - driving waveform control
0x74, 0x00, 0x03, 0x76, 0x12, 0x14, // R03 Power control
0x74, 0x00, 0x04, 0x76, 0x04, 0x66, // R04 Contrast control
0x74, 0x00, 0x05, 0x76, 0x00, 0x10, // R05 Entry mode
0x74, 0x00, 0x06, 0x76, 0x00, 0x00, // R06 RAM data write mask
0x74, 0x00, 0x07, 0x76, 0x00, 0x15, // R07 Display control
0x74, 0x00, 0x08, 0x76, 0x00, 0x03, // R08 Cursor Control
0x74, 0x00, 0x09, 0x76, 0x00, 0x00, // R09 RAM data write mask
0x74, 0x00, 0x0A, 0x76, 0x00, 0x15, // R0A
0x74, 0x00, 0x0B, 0x76, 0x00, 0x03, // R0B Horizontal Cursor Position
0x74, 0x00, 0x0C, 0x76, 0x00, 0x03, // R0C Vertical Cursor Position
0x74, 0x00, 0x0D, 0x76, 0x00, 0x00, // R0D
0x74, 0x00, 0x0E, 0x76, 0x00, 0x15, // R0E
0x74, 0x00, 0x0F, 0x76, 0x00, 0x03, // R0F
0x74, 0x00, 0x10, 0x76, 0x00, 0x15, // R0E
0x74, 0x00, 0x11, 0x76, 0x00, 0x03, // R0F
};
unsigned char Read_Block_Address_Macro[] = {0x74, 0x00, 0x12, 0x77, 0x00, 0x00};
unsigned char Draw_Block_Value_Macro[] = {0x74, 0x00, 0x12, 0x76, 0xFF, 0xFF};
unsigned char Draw_Block_Address_Macro[] = {0x74, 0x00, 0x11, 0x76, 0x00, 0x00};
unsigned int LcdAddress = 0, LcdTableAddress = 0;
unsigned char contrast = 0x66;
unsigned char backlight = 8;
int LCD_MEM[110 * 17]; //This array stores a copy of all data on the LCD
//screen. If memory is an issue though, this array
//can be eliminated and the halLcdReadBlock()
//command can be used instead whenever you are
//manipulating the currently displayed data.
/**********************************************************************//**
* @brief Sends 3+3 bytes of data to the LCD using the format specified
* by the LCD Guide.
*
* @param Data[] Data array for transmission
*
* @return none
*************************************************************************/
void halLcdSendCommand(unsigned char Data[])
{
unsigned char i;
LCD_CS_RST_OUT &= ~LCD_CS_PIN; //CS = 0 --> Start Transfer
for (i = 0; i < 6; i++)
{
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = Data[i]; // Load data
if (i == 2) //Pull CS up after 3 bytes
{
while (UCB2STAT & UCBUSY) ;
LCD_CS_RST_OUT |= LCD_CS_PIN; //CS = 1 --> Stop Transfer
LCD_CS_RST_OUT &= ~LCD_CS_PIN; //CS = 0 --> Start Transfer
}
}
while (UCB2STAT & UCBUSY) ;
LCD_CS_RST_OUT |= LCD_CS_PIN; //CS = 1 --> Stop Transfer
}
/**********************************************************************//**
* @brief Initializes the USCI module, LCD device for communication.
*
* - Sets up the SPI2C Communication Module
* - Performs Hitachi LCD Initialization Procedure
*
* @param none
*
* @return none
*************************************************************************/
void halLcdInit(void)
{
LCD_CS_RST_OUT |= LCD_CS_PIN | LCD_RESET_PIN;
LCD_CS_RST_DIR |= LCD_CS_PIN | LCD_RESET_PIN;
LCD_BACKLT_SEL |= LCD_BACKLIGHT_PIN;
LCD_CS_RST_OUT &= ~LCD_RESET_PIN; // Reset LCD
__delay_cycles(0x47FF); //Reset Pulse
LCD_CS_RST_OUT |= LCD_RESET_PIN;
// UCLK,MOSI setup, SOMI cleared
LCD_SPI_SEL |= LCD_MOSI_PIN + LCD_CLK_PIN;
LCD_SPI_SEL &= ~LCD_MISO_PIN;
LCD_SPI_DIR &= ~(LCD_MISO_PIN + LCD_MOSI_PIN); // Pin direction controlled by module,
// Set both pins to input as default
// Initialize the USCI_B2 module for SPI operation
UCB2CTL1 = UCSWRST; // Hold USCI in SW reset mode while configuring
// it
UCB2CTL0 = UCMST + UCSYNC + UCCKPL + UCMSB; // 3-pin, 8-bit SPI master
UCB2CTL1 |= UCSSEL_2; // SMCLK
UCB2BR0 = 4; // Note: Do not exceed D/S spec for UCLK!
UCB2BR1 = 0;
UCB2CTL1 &= ~UCSWRST; // Release USCI state machine
UCB2IFG &= ~UCRXIFG;
// Wake-up the LCD as per datasheet specifications
halLcdActive();
// LCD Initialization Routine Using Predefined Macros
halLcdSendCommand(&LcdInitMacro[1 * 6]);
halLcdSendCommand(&LcdInitMacro[2 * 6]);
halLcdSendCommand(&LcdInitMacro[4 * 6]);
halLcdSendCommand(&LcdInitMacro[5 * 6]);
halLcdSendCommand(&LcdInitMacro[6 * 6]);
halLcdSendCommand(&LcdInitMacro[7 * 6]);
}
/**********************************************************************//**
* @brief Shuts down the LCD display and hdisables the USCI communication.
*
* @param none
*
* @return none
*************************************************************************/
void halLcdShutDown(void)
{
halLcdStandby();
LCD_CS_RST_DIR |= LCD_CS_PIN | LCD_RESET_PIN;
LCD_CS_RST_OUT &= ~(LCD_CS_PIN | LCD_RESET_PIN);
LCD_CS_RST_OUT &= ~LCD_RESET_PIN;
LCD_SPI_SEL &= ~(LCD_MOSI_PIN + LCD_CLK_PIN + LCD_MISO_PIN);
LCD_CS_RST_DIR |= LCD_MOSI_PIN + LCD_CLK_PIN + LCD_MISO_PIN;
LCD_CS_RST_OUT &= ~(LCD_MOSI_PIN + LCD_CLK_PIN + LCD_MISO_PIN);
UCB2CTL0 = UCSWRST;
}
/**********************************************************************//**
* @brief Initializes the LCD backlight PWM signal.
*
* @param none
*
* @return none
*
*************************************************************************/
void halLcdBackLightInit(void)
{
LCD_BACKLT_DIR |= LCD_BACKLIGHT_PIN;
LCD_BACKLT_OUT |= LCD_BACKLIGHT_PIN;
LCD_BACKLT_SEL |= LCD_BACKLIGHT_PIN;
TA0CCTL3 = OUTMOD_7;
TA0CCR3 = TA0CCR0 >> 1;
backlight = 8;
TA0CCR0 = 400;
TA0CTL = TASSEL_2 + MC_1;
}
/**********************************************************************//**
* @brief Get function for the backlight PWM's duty cycle.
*
* @param none
*
* @return backlight One of the the 17 possible settings - valued 0 to 16.
*
*************************************************************************/
unsigned int halLcdGetBackLight(void)
{
return backlight;
}
/**********************************************************************//**
* @brief Set function for the backlight PWM's duty cycle
*
* @param BackLightLevel The target backlight duty cycle - valued 0 to 16.
*
* @return none
*************************************************************************/
void halLcdSetBackLight(unsigned char BackLightLevel)
{
unsigned int dutyCycle = 0, i, dummy;
if (BackLightLevel > 0)
{
TA0CCTL3 = OUTMOD_7;
dummy = (TA0CCR0 >> 4);
for (i = 0; i < BackLightLevel; i++)
dutyCycle += dummy;
TA0CCR3 = dutyCycle;
// If the backlight was previously turned off, turn it on.
if (!backlight)
TA0CTL |= MC0;
}
else
{
TA0CCTL3 = 0;
TA0CTL &= ~MC0;
}
backlight = BackLightLevel;
}
/**********************************************************************//**
* @brief Turns off the backlight.
*
* Clears the respective GPIO and timer settings.
*
* @param none
*
* @return none
*************************************************************************/
void halLcdShutDownBackLight(void)
{
LCD_BACKLT_DIR |= LCD_BACKLIGHT_PIN;
LCD_BACKLT_OUT &= ~(LCD_BACKLIGHT_PIN);
LCD_BACKLT_SEL &= ~LCD_BACKLIGHT_PIN;
TA0CCTL3 = 0;
TA0CTL = 0;
backlight = 0;
}
/**********************************************************************//**
* @brief Set function for the contrast level of the LCD.
*
* @param ContrastLevel The target contrast level
*
* @return none
*************************************************************************/
void halLcdSetContrast(unsigned char ContrastLevel)
{
if (ContrastLevel > 127) ContrastLevel = 127;
if (ContrastLevel < 70) ContrastLevel = 70;
LcdInitMacro[0x04 * 6 + 5] = ContrastLevel;
halLcdSendCommand(&LcdInitMacro[0x04 * 6]);
}
/**********************************************************************//**
* @brief Get function for the contrast level of the LCD.
*
* @param none
*
* @return ContrastLevel The LCD constrast level
*************************************************************************/
unsigned char halLcdGetContrast(void)
{
return LcdInitMacro[0x04 * 6 + 5];
}
/**********************************************************************//**
* @brief Turns the LCD cursor on at the current text position.
*
* @param none
*
* @return none
*************************************************************************/
void halLcdCursor(void)
{
LcdInitMacro[8 * 6 + 5] ^= BIT2;
halLcdSendCommand(&LcdInitMacro[8 * 6]);
LcdInitMacro[0x0B * 6 + 5] = ((LcdAddress & 0x1F) << 3);
LcdInitMacro[0x0B * 6 + 4] = ((LcdAddress & 0x1F) << 3) + 3;
LcdInitMacro[0x0C * 6 + 5] = (LcdAddress >> 5);
LcdInitMacro[0x0C * 6 + 4] = (LcdAddress >> 5) + 7;
halLcdSendCommand(&LcdInitMacro[0x0B * 6]);
halLcdSendCommand(&LcdInitMacro[0x0C * 6]);
halLcdSetAddress(LcdAddress);
}
/**********************************************************************//**
* @brief Turns off the LCD cursor.
*
* @param none
*
* @return none
*************************************************************************/
void halLcdCursorOff(void)
{
LcdInitMacro[8 * 6 + 5] &= ~BIT2;
halLcdSendCommand(&LcdInitMacro[8 * 6]);
}
/**********************************************************************//**
* @brief Inverts the grayscale values of the LCD display (Black <> white).
*
* @param none
*
* @return none
*************************************************************************/
void halLcdReverse(void)
{
LcdInitMacro[7 * 6 + 5] ^= BIT1;
halLcdSendCommand(&LcdInitMacro[7 * 6]);
}
/**********************************************************************//**
* @brief Sets the LCD in standby mode to reduce power consumption.
*
* @param none
*
* @return none
*************************************************************************/
void halLcdStandby(void)
{
LcdInitMacro[3 * 6 + 5] &= (~BIT3) & (~BIT2);
LcdInitMacro[3 * 6 + 5] |= BIT0;
halLcdSendCommand(&LcdInitMacro[3 * 6]);
}
/**********************************************************************//**
* @brief Puts the LCD into active mode.
*
* @param none
*
* @return none
*************************************************************************/
void halLcdActive(void)
{
halLcdSendCommand(LcdInitMacro); // R00 start oscillation
// Wait a minimum of 25ms after issuing "start oscillation"
// command (to accomodate for MCLK up to 25MHz)
{
int i;
for(i = 0; i < 5; ++i) {
__delay_cycles(50000);
}
}
LcdInitMacro[3 * 6 + 5] |= BIT3;
LcdInitMacro[3 * 6 + 5] &= ~BIT0;
halLcdSendCommand(&LcdInitMacro[3 * 6]); // R03 Power control
}
/**********************************************************************//**
* @brief Sets the pointer location in the LCD.
*
* - LcdAddress = Address
* - LcdTableAddress = Correct Address Row + Column
* = (Address / 0x20)* 17 + Column
*
* @param Address The target pointer location in the LCD.
*
* @return none
*************************************************************************/
void halLcdSetAddress(int Address)
{
int temp;
Draw_Block_Address_Macro[4] = Address >> 8;
Draw_Block_Address_Macro[5] = Address & 0xFF;
halLcdSendCommand(Draw_Block_Address_Macro);
LcdAddress = Address;
temp = Address >> 5; // Divided by 0x20
temp = temp + (temp << 4);
//Multiplied by (1+16) and added by the offset
LcdTableAddress = temp + (Address & 0x1F);
}
/**********************************************************************//**
* @brief Draws a block at the specified LCD address.
*
* A block is the smallest addressable memory on the LCD and is
* equivalent to 8 pixels, each of which is represented by 2 bits
* that represent a grayscale value between 00b and 11b.
*
* @param Address The address at which to draw the block.
*
* @param Value The value of the block
*
* @return none
*************************************************************************/
void halLcdDrawBlock(unsigned int Address, unsigned int Value)
{
halLcdSetAddress(Address);
halLcdDrawCurrentBlock(Value);
}
/**********************************************************************//**
* @brief Writes Value to LCD CGram and MSP430 internal LCD table.
*
* Also updates the LcdAddress and LcdTableAddress to the correct values.
*
* @param Value The value of the block to be written to the LCD.
*
* @return none
*************************************************************************/
void halLcdDrawCurrentBlock(unsigned int Value)
{
int temp;
Draw_Block_Value_Macro[4] = Value >> 8;
Draw_Block_Value_Macro[5] = Value & 0xFF;
LCD_MEM[LcdTableAddress] = Value;
halLcdSendCommand(Draw_Block_Value_Macro);
LcdAddress++;
temp = LcdAddress >> 5; // Divided by 0x20
temp = temp + (temp << 4);
// Multiplied by (1+16) and added by the offset
LcdTableAddress = temp + (LcdAddress & 0x1F);
// If LcdAddress gets off the right edge, move to next line
if ((LcdAddress & 0x1F) > 0x11)
halLcdSetAddress((LcdAddress & 0xFFE0) + 0x20);
if (LcdAddress == LCD_Size)
halLcdSetAddress(0);
}
/**********************************************************************//**
* @brief Returns the LCD CGRAM value at location Address.
*
* @param Address The address of the block to be read from the LCD.
*
* @return Value The value held at the specified address.
*************************************************************************/
int halLcdReadBlock(unsigned int Address)
{
int i = 0, Value = 0, ReadData[7];
halLcdSetAddress(Address);
halLcdSendCommand(Read_Block_Address_Macro);
LCD_CS_RST_OUT &= ~LCD_CS_PIN; // start transfer CS=0
UCB2TXBUF = 0x77; // Transmit first character 0x77
while (!(UCB2IFG & UCTXIFG)) ;
while (UCB2STAT & UCBUSY) ;
//Read 5 dummies values and 2 valid address data
LCD_SPI_SEL &= ~LCD_MOSI_PIN; //Change SPI2C Dir
LCD_SPI_SEL |= LCD_MISO_PIN;
for (i = 0; i < 7; i++)
{
UCB2IFG &= ~UCRXIFG;
UCB2TXBUF = 1; // load dummy byte 1 for clk
while (!(UCB2IFG & UCRXIFG)) ;
ReadData[i] = UCB2RXBUF;
}
LCD_CS_RST_OUT |= LCD_CS_PIN; // Stop Transfer CS = 1
LCD_SPI_SEL |= LCD_MOSI_PIN; //Change SPI2C Dir
LCD_SPI_SEL &= ~LCD_MISO_PIN;
LCD_CS_RST_DIR |= LCD_MOSI_PIN + LCD_CLK_PIN;
LCD_CS_RST_DIR &= ~LCD_MISO_PIN;
Value = (ReadData[5] << 8) + ReadData[6];
return Value;
}
/**********************************************************************//**
* @brief Draw a Pixel of grayscale at coordinate (x,y) to LCD
*
* @param x x-coordinate for grayscale value
*
* @param y y-coordinate for grayscale value
*
* @param GrayScale The intended grayscale value of the pixel - one of
* four possible settings.
*
* @return none
*************************************************************************/
void halLcdPixel(int x, int y, unsigned char GrayScale)
{
int Address, Value;
unsigned char offset;
//Each line increments by 0x20
if ((x >= 0) && (x < LCD_COL) && (y >= 0) && (y < LCD_ROW))
{
Address = (y << 5) + (x >> 3); //Narrow down to 8 possible pixels
Value = LCD_MEM[(y << 4) + y + (x >> 3)]; //y * 17 --> row. x>>3 --> column
offset = (x & 0x07) << 1; //3 LSBs = pos. within the 8 columns
Value &= ~(3 << offset); //clear out the corresponding bits
Value |= GrayScale << offset; //set pixel to GrayScale level
halLcdDrawBlock(Address, Value);
}
}
/**********************************************************************//**
* @brief Clears entire LCD CGRAM as well as LCD_MEM.
*
* @param none
*
* @return none
*************************************************************************/
void halLcdClearScreen(void)
{
int i, j, k, Current_Location = 0;
halLcdSetAddress(0);
for (i = 0; i < 110; i++)
{
//prepare to send image
LCD_CS_RST_OUT &= ~LCD_CS_PIN; //CS = 0 --> Start Transfer
for (k = 0; k < 3; k++)
{
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = Draw_Block_Value_Macro[k]; // Load data
}
while (UCB2STAT & UCBUSY) ;
LCD_CS_RST_OUT |= LCD_CS_PIN; //CS = 1 --> Stop Transfer
LCD_CS_RST_OUT &= ~LCD_CS_PIN; //CS = 0 --> Start Transfer
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = Draw_Block_Value_Macro[3]; // Load data
//send blank line
for (j = 0; j < 17; j++)
{
LCD_MEM[LcdTableAddress++] = 0x00;
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = 0x00; // Load data
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = 0x00; // Load data
}
//Clear the partially visible block at the edge of the screen
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = 0x00; // Load data
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = 0x00; // Load data
while (UCB2STAT & UCBUSY) ;
LCD_CS_RST_OUT |= LCD_CS_PIN; //CS = 1 --> Stop Transfer
Current_Location += 0x20;
halLcdSetAddress(Current_Location);
}
halLcdSetAddress(0);
}
/**********************************************************************//**
* @brief Loads an image of size = rows * columns, starting at the
* coordinate (x,y).
*
* @param Image[] The image to be loaded
*
* @param Rows The number of rows in the image. Size = Rows * Columns.
*
* @param Columns The number of columns in the image. Size = Rows * Columns.
*
* @param x x-coordinate of the image's starting location
*
* @param y y-coordinate of the image's starting location
*
* @return none
*************************************************************************/
void halLcdImage(const unsigned int Image[], int Columns, int Rows, int x, int y)
{
int i, CurrentLocation;
CurrentLocation = (y << 5) + (x >> 3);
halLcdSetAddress(CurrentLocation);
for (i = 0; i < Rows; i++)
{
halLcdDrawCurrentLine(Image, Columns);
Image += Columns;
CurrentLocation += 0x20;
halLcdSetAddress(CurrentLocation);
}
}
/**********************************************************************//**
* @brief Writes Value to LCD CGram and MSP430 internal LCD table.
*
* Also updates the LcdAddress and LcdTableAddress to the correct values.
*
* @param *value Pointer to the line to be written to the LCD.
*
* @return none
*************************************************************************/
void halLcdDrawCurrentLine(const unsigned int *value, int Columns)
{
unsigned char i;
//prepare to send image
LCD_CS_RST_OUT &= ~LCD_CS_PIN; //CS = 0 --> Start Transfer
for (i = 0; i < 3; i++)
{
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = Draw_Block_Value_Macro[i]; // Load data
}
while (UCB2STAT & UCBUSY) ;
LCD_CS_RST_OUT |= LCD_CS_PIN; //CS = 1 --> Stop Transfer
LCD_CS_RST_OUT &= ~LCD_CS_PIN; //CS = 0 --> Start Transfer
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = Draw_Block_Value_Macro[3]; // Load data
//send the image
for (i = 0; i < Columns; i++)
{
// Make sure we are not writing outside LCD_MEM[]
if (LcdTableAddress >= sizeof(LCD_MEM)){
break;
}
LCD_MEM[LcdTableAddress++] = *value;
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = (*value) >> 8; // Load data
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = (*value++) & 0xFF; // Load data
}
while (UCB2STAT & UCBUSY) ;
LCD_CS_RST_OUT |= LCD_CS_PIN; //CS = 1 --> Stop Transfer
}
/**********************************************************************//**
* @brief Clears an image of size rows x columns starting at (x, y).
*
* @param Columns The size, in columns, of the image to be cleared.
*
* @param Rows The size, in rows, of the image to be cleared.
*
* @param x x-coordinate of the image to be cleared
*
* @param y y-coordinate of the image to be cleared
*
* @return none
*************************************************************************/
void halLcdClearImage(int Columns, int Rows, int x, int y)
{
int i, j, k, Current_Location;
Current_Location = (y << 5) + (x >> 3);
halLcdSetAddress(Current_Location);
for (i = 0; i < Rows; i++)
{
//prepare to send image
LCD_CS_RST_OUT &= ~LCD_CS_PIN; //CS = 0 --> Start Transfer
for (k = 0; k < 3; k++)
{
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = Draw_Block_Value_Macro[k]; // Load data
}
while (UCB2STAT & UCBUSY) ;
LCD_CS_RST_OUT |= LCD_CS_PIN; //CS = 1 --> Stop Transfer
LCD_CS_RST_OUT &= ~LCD_CS_PIN; //CS = 0 --> Start Transfer
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = Draw_Block_Value_Macro[3]; // Load data
//send blank line
for (j = 0; j < Columns; j++)
{
LCD_MEM[LcdTableAddress++] = 0x00;
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = 0x00; // Load data
while (!(UCB2IFG & UCTXIFG)) ; // Wait for TXIFG
UCB2TXBUF = 0x00; // Load data
}
while (UCB2STAT & UCBUSY) ;
LCD_CS_RST_OUT |= LCD_CS_PIN; //CS = 1 --> Stop Transfer
Current_Location += 0x20;
halLcdSetAddress(Current_Location);
}
}
/**********************************************************************//**
* @brief Writes Value to LCD CGRAM. Pointers internal to the LCD
* are also updated.
*
* @param Value The value to be written to the current LCD pointer
*
* @return none
*************************************************************************/
void halLcdDrawTextBlock(unsigned int Value)
{
int temp;
Draw_Block_Value_Macro[4] = Value >> 8;
Draw_Block_Value_Macro[5] = Value & 0xFF;
LCD_MEM[LcdTableAddress] = Value;
halLcdSendCommand(Draw_Block_Value_Macro);
LcdAddress++;
temp = LcdAddress >> 5; // Divided by 0x20
temp = temp + (temp << 4);
//Multiplied by (1+16) and added by the offset
LcdTableAddress = temp + (LcdAddress & 0x1F);
// If LcdAddress gets off the right edge, move to next line
if ((LcdAddress & 0x1F) > 0x10)
halLcdSetAddress((LcdAddress & 0xFFE0) + 0x20);
if (LcdAddress >= LCD_Size)
halLcdSetAddress(0);
}
/**********************************************************************//**
* @brief Displays the string to the LCD starting at current location.
*
* Writes all the data to LCD_MEM first, then updates all corresponding
* LCD CGRAM locations at once, in a continuous fashion.
*
* @param String[] The string to be displayed on LCD.
*
* @param TextStyle Value that specifies whether the string is to be
* inverted or overwritten.
* - Invert = 0x01
* - Overwrite = 0x04
*
* @return none
*************************************************************************/
void halLcdPrint(char String[], unsigned char TextStyle)
{
int i, j, Counter = 0, BlockValue;
int Address, LCD_MEM_Add, ActualAddress;
int temp;
char LookUpChar;
ActualAddress = LcdAddress;
Counter = LcdAddress & 0x1F;
i = 0;
while (String[i] != 0) // Stop on null character
{
LookUpChar = fonts_lookup[(unsigned char)String[i]];
for (j = 0; j < FONT_HEIGHT; j++)
{
Address = ActualAddress + j * 0x20;
temp = Address >> 5;
temp += (temp << 4);
LCD_MEM_Add = temp + (Address & 0x1F);
BlockValue = LCD_MEM[LCD_MEM_Add];
if (TextStyle & GRAYSCALE_TEXT)
{
if (TextStyle & INVERT_TEXT)
if (TextStyle & OVERWRITE_TEXT)
BlockValue = 0xAAAA - GrayScale_fonts[LookUpChar * (FONT_HEIGHT + 1) + j];
else
BlockValue |= 0xAAAA - GrayScale_fonts[LookUpChar * (FONT_HEIGHT + 1) + j];
else
if (TextStyle & OVERWRITE_TEXT)
BlockValue = GrayScale_fonts[LookUpChar * (FONT_HEIGHT + 1) + j];
else
BlockValue |= GrayScale_fonts[LookUpChar * (FONT_HEIGHT + 1) + j];
}
else
{
if (TextStyle & INVERT_TEXT)
if (TextStyle & OVERWRITE_TEXT)
BlockValue = 0xFFFF - fonts[LookUpChar * 13 + j];
else
BlockValue |= 0xFFFF - fonts[LookUpChar * 13 + j];
else
if (TextStyle & OVERWRITE_TEXT)
BlockValue = fonts[LookUpChar * (FONT_HEIGHT + 1) + j];
else
BlockValue |= fonts[LookUpChar * (FONT_HEIGHT + 1) + j];
}
halLcdDrawBlock(Address, BlockValue);
}
Counter++;
if (Counter == 17)
{
Counter = 0;
ActualAddress += 0x20 * FONT_HEIGHT - 16;
if (ActualAddress > LCD_Last_Pixel - 0x20 * FONT_HEIGHT)
ActualAddress = 0;
}
else
ActualAddress++;
i++;
}
halLcdSetAddress(ActualAddress);
}
/**********************************************************************//**
* @brief Displays the string to the LCD starting at (x,y) location.
*
* Writes all the data to LCD_MEM first, then updates all corresponding
* LCD CGRAM locations at once, in a continuous fashion.
*
* @param String[] String to be displayed on LCD
*
* @param x x-coordinate of the write location on the LCD
*
* @param y y-coordinate of the write location on the LCD
*
* @param TextStyle Value that specifies whether the string is to be
* inverted or overwritten.
* - Invert = 0x01
* - Overwrite = 0x04
*************************************************************************/
void halLcdPrintXY(char String[], int x, int y, unsigned char TextStyle)
{
//Each line increments by 0x20
halLcdSetAddress((y << 5) + (x >> 3)); //Narrow down to 8 possible pixels
halLcdPrint(String, TextStyle);
}
/**********************************************************************//**
* @brief Displays a string on the LCD on the specified line.
*
* @param String[] The string to be displayed on LCD.
*
* @param Line The line on the LCD on which to print the string.
*
* @param TextStyle Value that specifies whether the string is to be
* inverted or overwritten.
* - Invert = 0x01
* - Overwrite = 0x04
*
* @return none
*************************************************************************/
void halLcdPrintLine(char String[], unsigned char Line, unsigned char TextStyle)
{
int temp;
temp = Line * FONT_HEIGHT;
halLcdSetAddress(temp << 5); // 0x20 = 2^5
halLcdPrint(String, TextStyle);
}
/**********************************************************************//**
* @brief Prints a string beginning on a given line and column.
*
* @param String[] The string to be displayed on LCD.
*
* @param Line The line on which to print the string of text
*
* @param Col The column on which to print the string of text
*
* @param TextStyle Value that specifies whether the string is to be
* inverted or overwritten.
* - Invert = 0x01
* - Overwrite = 0x04
*
* @return none
*************************************************************************/
void halLcdPrintLineCol(char String[], unsigned char Line, unsigned char Col,
unsigned char TextStyle)
{
int temp;
temp = Line * FONT_HEIGHT;
temp <<= 5;
temp += Col;
halLcdSetAddress(temp); // 0x20 = 2^5
halLcdPrint(String, TextStyle);
}
/**********************************************************************//**
* @brief Draws a horizontral line from (x1,y) to (x2,y) of GrayScale level
*
* @param x1 x-coordinate of the first point
*
* @param x2 x-coordinate of the second point
*
* @param y y-coordinate of both points
*
* @param GrayScale Grayscale level of the horizontal line
*
* @return none
*************************************************************************/
void halLcdHLine(int x1, int x2, int y, unsigned char GrayScale)
{
int x_dir, x;
if (x1 < x2)
x_dir = 1;
else
x_dir = -1;
x = x1;
while (x != x2)
{
halLcdPixel(x, y, GrayScale);
x += x_dir;
}
}
/**********************************************************************//**
* @brief Draws a vertical line from (x,y1) to (x,y2) of GrayScale level
*
* @param x x-coordinate of both points
*
* @param y1 y-coordinate of the first point
*
* @param y2 y-coordinate of the second point
*
* @param GrayScale GrayScale level of the vertical line
*
* @return none
*************************************************************************/
void halLcdVLine(int x, int y1, int y2, unsigned char GrayScale)
{
int y_dir, y;
if (y1 < y2)
y_dir = 1;
else
y_dir = -1;
y = y1;
while (y != y2)
{
halLcdPixel(x, y, GrayScale);
y += y_dir;
}
}
/**********************************************************************//**
* @brief Draws a line from (x1,y1) to (x2,y2) of GrayScale level.
*
* Uses Bresenham's line algorithm.
*
* @param x1 x-coordinate of the first point
*
* @param y1 y-coordinate of the first point
*
* @param x2 x-coordinate of the second point
*
* @param y2 y-coordinate of the second point
*
* @param GrayScale Grayscale level of the line
*
* @return none
*************************************************************************/
void halLcdLine(int x1, int y1, int x2, int y2, unsigned char GrayScale)
{
int x, y, deltay, deltax, d;
int x_dir, y_dir;
if (x1 == x2)
halLcdVLine(x1, y1, y2, GrayScale);
else
{
if (y1 == y2)
halLcdHLine(x1, x2, y1, GrayScale);
else // a diagonal line
{
if (x1 > x2)
x_dir = -1;
else x_dir = 1;
if (y1 > y2)
y_dir = -1;
else y_dir = 1;
x = x1;
y = y1;
deltay = ABS(y2 - y1);
deltax = ABS(x2 - x1);
if (deltax >= deltay)
{
d = (deltay << 1) - deltax;
while (x != x2)
{
halLcdPixel(x, y, GrayScale);
if (d < 0)
d += (deltay << 1);
else
{
d += ((deltay - deltax) << 1);
y += y_dir;
}
x += x_dir;
}
}
else
{
d = (deltax << 1) - deltay;
while (y != y2)
{
halLcdPixel(x, y, GrayScale);
if (d < 0)
d += (deltax << 1);
else
{
d += ((deltax - deltay) << 1);
x += x_dir;
}
y += y_dir;
}
}
}
}
}
/**********************************************************************//**
* @brief Draw a circle of Radius with center at (x,y) of GrayScale level.
*
* Uses Bresenham's circle algorithm
*
* @param x x-coordinate of the circle's center point
*
* @param y y-coordinate of the circle's center point
*
* @param Radius Radius of the circle
*
* @param GrayScale Grayscale level of the circle
*************************************************************************/
void halLcdCircle(int x, int y, int Radius, int GrayScale)
{
int xx, yy, ddF_x, ddF_y, f;
ddF_x = 0;
ddF_y = -(2 * Radius);
f = 1 - Radius;
xx = 0;
yy = Radius;
halLcdPixel(x + xx, y + yy, GrayScale);
halLcdPixel(x + xx, y - yy, GrayScale);
halLcdPixel(x - xx, y + yy, GrayScale);
halLcdPixel(x - xx, y - yy, GrayScale);
halLcdPixel(x + yy, y + xx, GrayScale);
halLcdPixel(x + yy, y - xx, GrayScale);
halLcdPixel(x - yy, y + xx, GrayScale);
halLcdPixel(x - yy, y - xx, GrayScale);
while (xx < yy)
{
if (f >= 0)
{
yy--;
ddF_y += 2;
f += ddF_y;
}
xx++;
ddF_x += 2;
f += ddF_x + 1;
halLcdPixel(x + xx, y + yy, GrayScale);
halLcdPixel(x + xx, y - yy, GrayScale);
halLcdPixel(x - xx, y + yy, GrayScale);
halLcdPixel(x - xx, y - yy, GrayScale);
halLcdPixel(x + yy, y + xx, GrayScale);
halLcdPixel(x + yy, y - xx, GrayScale);
halLcdPixel(x - yy, y + xx, GrayScale);
halLcdPixel(x - yy, y - xx, GrayScale);
}
}
/**********************************************************************//**
* @brief Scrolls a single row of pixels one column to the left.
*
* The column that is scrolled out of the left side of the LCD will be
* displayed the right side of the LCD.
*
* @param y The row of pixels to scroll. y = 0 is at the top-left
* corner of the LCD.
*
* @return none
*************************************************************************/
void halLcdScrollRow(int y)
{
int i, Address, LcdTableAddressTemp;
unsigned int temp;
Address = y << 5;
halLcdSetAddress(Address);
//Multiplied by (1+16) and added by the offset
LcdTableAddressTemp = y + (y << 4);
temp = ((LCD_MEM[LcdTableAddressTemp] & 0x0003) << 14);
for (i = 0; i < 0x10; i++)
halLcdDrawCurrentBlock(((LCD_MEM[LcdTableAddressTemp + i] & 0xFFFC) >> 2) \
+ ((LCD_MEM[LcdTableAddressTemp + i + 1] & 0x0003) << 14));
halLcdDrawCurrentBlock(((LCD_MEM[LcdTableAddressTemp + 0x10] & 0xFFFC) >> 2) + temp);
}
/**********************************************************************//**
* @brief Scrolls multiple rows of pixels, yStart to yEnd,
* one column to the left.
*
* The column that is scrolled out of the left side of the LCD will be
* displayed the right side of the LCD. y = 0 is at the top-left of the
* LCD screen.
*
* @param yStart The beginning row to be scrolled
*
* @param yEnd The last row to be scrolled
*
* @return none
*************************************************************************/
void halLcdHScroll(int yStart, int yEnd)
{
int i;
for (i = yStart; i < yEnd + 1; i++)
halLcdScrollRow(i);
}
/**********************************************************************//**
* @brief Scrolls a line of text one column to the left.
*
* @param Line The line of text to be scrolled.
*
* @return none
*************************************************************************/
void halLcdScrollLine(int Line)
{
int i, Row;
Row = Line * FONT_HEIGHT;
for (i = Row; i < Row + FONT_HEIGHT; i++)
halLcdScrollRow(i);
}
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