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SSD2119-1.c
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SSD2119-1.c
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// SSD2119.c
// Runs on LM4F120/TM4C123
// Driver for the SSD2119 interface on a Kentec 320x240x16 BoosterPack
// - Uses all 8 bits on PortB for writing data to LCD
// and bits 4-7 on Port A for control signals
//
//
// Data pin assignments:
// PB0-7 LCD parallel data input
//
// Control pin assignments:
// PA4 RD Read control signal -------------------------
// PA5 WR Write control signal | PA7 | PA6 | PA5 | PA4 |
// PA6 RS Register/Data select signal | CS | RS | WR | RD |
// PA7 CS Chip select signal -------------------------
//
// Touchpad pin assignments:
// PA2 Y- ------------- -------------
// PA3 X- | PA3 | PA2 | | PE5 | PE4 |
// PE4 X+ AIN9 | X- | Y- | | Y+ | X+ |
// PE5 Y+ AIN8 ------------- -------------
//
// Touchscreen resistance measurements:
// -------------------
// |1 2| XN->YP XP->YN
// | | 1 1150 1400
// | | 2 640 800
// | 5 | 3 1400 1100
// | | 4 870 580
// |3 4| 5 1000 960
// -------------------
//
// XP->XN = 651
#include <stdint.h>
#include "tm4c123gh6pm.h"
#include "SSD2119.h"
#include "Dispenser.h"
// 4 bit Color red,green,blue to 16 bit color
// bits 15-11 5 bit red
// bits 10-5 6-bit green
// bits 4-0 5-bit blue
unsigned short const Color4[16] = {
0, //0 – black (#000000) 000000 0
((0x00>>3)<<11) | ((0x00>>2)<<5) | (0xAA>>3), //1 – blue (#0000AA) 000001 1
((0x00>>3)<<11) | ((0xAA>>2)<<5) | (0x00>>3), //2 – green (#00AA00) 000010 2
((0x00>>3)<<11) | ((0xAA>>2)<<5) | (0xAA>>3), //3 – cyan (#00AAAA) 000011 3
((0xAA>>3)<<11) | ((0x00>>2)<<5) | (0x00>>3), //4 – red (#AA0000) 000100 4
((0xAA>>3)<<11) | ((0x00>>2)<<5) | (0xAA>>3), //5 – magenta (#AA00AA) 000101 5
((0xAA>>3)<<11) | ((0x55>>2)<<5) | (0x00>>3), //6 – brown (#AA5500) 010100 20
((0xAA>>3)<<11) | ((0xAA>>2)<<5) | (0xAA>>3), //7 – white / light gray (#AAAAAA) 000111 7
((0x55>>3)<<11) | ((0x55>>2)<<5) | (0x55>>3), //8 – dark gray /bright black (#555555) 111000 56
((0x55>>3)<<11) | ((0x55>>2)<<5) | (0xFF>>3), //9 – bright blue (#5555FF) 111001 57
((0x55>>3)<<11) | ((0xFF>>2)<<5) | (0x55>>3), //10 – bright green (#55FF55) 111010 58
((0x55>>3)<<11) | ((0xFF>>2)<<5) | (0xFF>>3), //11 – bright cyan (#55FFFF) 111011 59
((0xFF>>3)<<11) | ((0x55>>2)<<5) | (0x55>>3), //12 – bright red (#FF5555) 111100 60
((0xFF>>3)<<11) | ((0x55>>2)<<5) | (0xFF>>3), //13 – bright magenta (#FF55FF) 111101 61
((0xFF>>3)<<11) | ((0xFF>>2)<<5) | (0x55>>3), //14 – bright yellow (#FFFF55) 111110 62
((0xFF>>3)<<11) | ((0xFF>>2)<<5) | (0xFF>>3) //15 – bright white (#FFFFFF) 111111 63
};
unsigned short cursorX;
unsigned short cursorY;
unsigned short textColor;
typedef struct {
short x;
short y;
} coord;
// dimensions of the LCD in pixels
#define LCD_HEIGHT 240
#define LCD_WIDTH 320
// converts 24bit RGB color to display color
//#define CONVERT24BPP(c) ( (((c) & 0x00f80000) >> 8) | (((c) & 0x0000fc00) >> 5) | (((c) & 0x000000f8) >> 3) )
#define CONVERT24BPP(c) ( (((c) & 0x00f80000) >> 8) | (((c) & 0x0000fc00) >> 5) | (((c) & 0x000000f8) >> 3) )
// converts 8bit greyscale to display color
#define CONVERT8BPP(c) ( (((c) >> 3) << 11) | (((c) >> 2) << 5 ) | ((c) >> 3) )
// converts 4bit greyscale to display color
#define CONVERT4BPP(c) ( ((c) << 12) | ((c) << 7 ) | ((c) << 1) )
// define BMP offsets
#define BMP_WIDTH_OFFSET 0x0012
#define BMP_HEIGHT_OFFSET 0x0016
#define BMP_DATA_OFFSET 0x000A
#define BMP_BPP_OFFSET 0x001C
// define command codes
#define SSD2119_DEVICE_CODE_READ_REG 0x00
#define SSD2119_OSC_START_REG 0x00
#define SSD2119_OUTPUT_CTRL_REG 0x01
#define SSD2119_LCD_DRIVE_AC_CTRL_REG 0x02
#define SSD2119_PWR_CTRL_1_REG 0x03
#define SSD2119_DISPLAY_CTRL_REG 0x07
#define SSD2119_FRAME_CYCLE_CTRL_REG 0x0B
#define SSD2119_PWR_CTRL_2_REG 0x0C
#define SSD2119_PWR_CTRL_3_REG 0x0D
#define SSD2119_PWR_CTRL_4_REG 0x0E
#define SSD2119_GATE_SCAN_START_REG 0x0F
#define SSD2119_SLEEP_MODE_REG 0x10
#define SSD2119_ENTRY_MODE_REG 0x11
#define SSD2119_GEN_IF_CTRL_REG 0x15
#define SSD2119_PWR_CTRL_5_REG 0x1E
#define SSD2119_RAM_DATA_REG 0x22
#define SSD2119_FRAME_FREQ_REG 0x25
#define SSD2119_VCOM_OTP_1_REG 0x28
#define SSD2119_VCOM_OTP_2_REG 0x29
#define SSD2119_GAMMA_CTRL_1_REG 0x30
#define SSD2119_GAMMA_CTRL_2_REG 0x31
#define SSD2119_GAMMA_CTRL_3_REG 0x32
#define SSD2119_GAMMA_CTRL_4_REG 0x33
#define SSD2119_GAMMA_CTRL_5_REG 0x34
#define SSD2119_GAMMA_CTRL_6_REG 0x35
#define SSD2119_GAMMA_CTRL_7_REG 0x36
#define SSD2119_GAMMA_CTRL_8_REG 0x37
#define SSD2119_GAMMA_CTRL_9_REG 0x3A
#define SSD2119_GAMMA_CTRL_10_REG 0x3B
#define SSD2119_V_RAM_POS_REG 0x44
#define SSD2119_H_RAM_START_REG 0x45
#define SSD2119_H_RAM_END_REG 0x46
#define SSD2119_X_RAM_ADDR_REG 0x4E
#define SSD2119_Y_RAM_ADDR_REG 0x4F
#define ENTRY_MODE_DEFAULT 0x6830
// number of 5x8 characters that will fit on the screen
#define MAX_CHARS_X 53
#define MAX_CHARS_Y 26
// entry mode macros
#define HORIZ_DIRECTION 0x28
#define VERT_DIRECTION 0x20
#define ENTRY_MODE_DEFAULT 0x6830 // 0110.1000.0011.0000
#define MAKE_ENTRY_MODE(x) ((ENTRY_MODE_DEFAULT & 0xFF00) | (x))
// bit-banded addresses for port stuff
#define LCD_RD_PIN (*((volatile unsigned long *)0x40004040)) // PA4
#define LCD_WR_PIN (*((volatile unsigned long *)0x40004080)) // PA5
#define LCD_RS_PIN (*((volatile unsigned long *)0x40004100)) // PA6
#define LCD_CS_PIN (*((volatile unsigned long *)0x40004200)) // PA7
#define LCD_CTRL (*((volatile unsigned long *)0x400043C0)) // PA4-7
#define LCD_DATA (*((volatile unsigned long *)0x400053FC)) // PB0-7
// ************** ADC_Init *********************************
// - Initializes the ADC to use a specficed channel on SS3
// *********************************************************
// Input: channel number
// Output: none
// *********************************************************
void ADC_Init(void);
// ************** ADC_Read *********************************
// - Takes a sample from the ADC
// *********************************************************
// Input: none
// Output: sampled value from the ADC
// *********************************************************
unsigned long ADC_Read(void);
// ************** ADC_SetChannel ***************************
// - Configures the ADC to use a specific channel
// *********************************************************
// Input: none
// Output: none
// *********************************************************
void ADC_SetChannel(unsigned char channelNum);
/* *************************************************************
TODO: Please fill the information based on the pseudocode
******************************************************************/
// ************** TODO: LCD_GPIOInit ****************************
// - Initializes Port B to be used as the data bus and
// Port A 4-7 as controller signals
// ********************************************************
void LCD_GPIOInit(void){
unsigned long wait = 0;
TSYSCTL_RCGCGPIO_R |= 0x2; // activate port B
wait++; // wait for port activation
wait++; // wait for port activation
TGPIO_PORTB_DIR_R = 0xFF; // make PB0-7 outputs
TGPIO_PORTB_AFSEL_R &= ~0xFF; // disable alternate functions
TGPIO_PORTB_DEN_R = 0xFF; // enable digital I/O on PB0-7
// activate control pins
TSYSCTL_RCGCGPIO_R |= 0x1; // activate port A
wait++; // wait for port activation
wait++; // wait for port activation
TGPIO_PORTA_DIR_R |= 0xF0; // make PA4-7 outputs
TGPIO_PORTA_AFSEL_R &= ~0xF0; // disable alternate functions
TGPIO_PORTA_DEN_R |= 0xF0; // enable digital I/O on PA4-7
for (wait = 0; wait < 500; wait++) {}
}
// ************** LCD_WriteCommand ************************
// - Writes a command to the LCD controller
// - RS low during command write
// ********************************************************
// PA4 RD Read control signal -------------------------
// PA5 WR Write control signal | PA7 | PA6 | PA5 | PA4 |
// PA6 RS Register/Data select signal | CS | RS | WR | RD |
// PA7 CS Chip select signal -------------------------
void LCD_WriteCommand(unsigned char data){volatile unsigned long delay;
LCD_CTRL = 0x30; // Set CS=0, RS=0, WR=1, RD=1
LCD_DATA = 0x00; // Write 0 as MSB of command data
delay++;
LCD_CTRL = 0x10; // Set WR low
delay++;
LCD_CTRL = 0x30; // Set WR high
LCD_DATA = data; // Write data as LSB of command data
delay++;
LCD_CTRL = 0x10; // Set WR low
delay++;
LCD_CTRL = 0xF0; // Set all high
}
// ************** LCD_WriteData ***************************
// - Writes data to the LCD controller
// - RS high during data write
// ********************************************************
// PA4 RD Read control signal -------------------------
// PA5 WR Write control signal | PA7 | PA6 | PA5 | PA4 |
// PA6 RS Register/Data select signal | CS | RS | WR | RD |
// PA7 CS Chip select signal -------------------------
void LCD_WriteData(unsigned short data){volatile unsigned long delay;
LCD_CTRL = 0x70; // CS low
LCD_DATA = (data >> 8); // Write MSB to LCD data bus
delay++;
LCD_CTRL = 0x50; // Set WR low
delay++;
LCD_CTRL = 0x70; // Set WR high
LCD_DATA = data; // Write LSB to LCD data bus
delay++;
LCD_CTRL = 0x50; // Set WR low
delay++;
LCD_CTRL = 0xF0; // Set CS, WR high
}
// ************** LCD_Init ********************************
// - Initializes the LCD
// - Command sequence verbatim from original driver
// ********************************************************
void LCD_Init(void){
unsigned long count = 0;
LCD_GPIOInit();
// Enter sleep mode (if we are not already there).
LCD_WriteCommand(SSD2119_SLEEP_MODE_REG);
LCD_WriteData(0x0001);
// Set initial power parameters.
LCD_WriteCommand(SSD2119_PWR_CTRL_5_REG);
LCD_WriteData(0x00BA);
LCD_WriteCommand(SSD2119_VCOM_OTP_1_REG);
LCD_WriteData(0x0006);
// Start the oscillator.
LCD_WriteCommand(SSD2119_OSC_START_REG);
LCD_WriteData(0x0001);
// Set pixel format and basic display orientation (scanning direction).
LCD_WriteCommand(SSD2119_OUTPUT_CTRL_REG);
LCD_WriteData(0x72EF); //0x72EF = 0,0 in top left, scan right
LCD_WriteCommand(SSD2119_LCD_DRIVE_AC_CTRL_REG); //0x30EF = 0,0 in bottom right, scan left
LCD_WriteData(0x0600); //0x32EF = 0,0 in top right, scan left
// Exit sleep mode.
LCD_WriteCommand(SSD2119_SLEEP_MODE_REG);
LCD_WriteData(0x0000);
// Delay 30mS
for (count = 0; count < 200000; count++) {}
// Configure pixel color format and MCU interface parameters.
LCD_WriteCommand(SSD2119_ENTRY_MODE_REG);
LCD_WriteData(ENTRY_MODE_DEFAULT);
// Enable the display.
LCD_WriteCommand(SSD2119_DISPLAY_CTRL_REG);
LCD_WriteData(0x0033);
// Set VCIX2 voltage to 6.1V.
LCD_WriteCommand(SSD2119_PWR_CTRL_2_REG);
LCD_WriteData(0x0005);
// Configure gamma correction.
LCD_WriteCommand(SSD2119_GAMMA_CTRL_1_REG);
LCD_WriteData(0x0000);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_2_REG);
LCD_WriteData(0x0400);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_3_REG);
LCD_WriteData(0x0106);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_4_REG);
LCD_WriteData(0x0700);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_5_REG);
LCD_WriteData(0x0002);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_6_REG);
LCD_WriteData(0x0702);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_7_REG);
LCD_WriteData(0x0707);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_8_REG);
LCD_WriteData(0x0203);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_9_REG);
LCD_WriteData(0x1400);
LCD_WriteCommand(SSD2119_GAMMA_CTRL_10_REG);
LCD_WriteData(0x0F03);
// Configure Vlcd63 and VCOMl.
LCD_WriteCommand(SSD2119_PWR_CTRL_3_REG);
LCD_WriteData(0x0007);
LCD_WriteCommand(SSD2119_PWR_CTRL_4_REG);
LCD_WriteData(0x3100);
// Set the display size and ensure that the GRAM window is set to allow
// access to the full display buffer.
LCD_WriteCommand(SSD2119_V_RAM_POS_REG);
LCD_WriteData((LCD_HEIGHT-1) << 8);
LCD_WriteCommand(SSD2119_H_RAM_START_REG);
LCD_WriteData(0x0000);
LCD_WriteCommand(SSD2119_H_RAM_END_REG);
LCD_WriteData(LCD_WIDTH-1);
LCD_WriteCommand(SSD2119_X_RAM_ADDR_REG);
LCD_WriteData(0x00);
LCD_WriteCommand(SSD2119_Y_RAM_ADDR_REG);
LCD_WriteData(0x00);
// Clear the contents of the display buffer.
LCD_WriteCommand(SSD2119_RAM_DATA_REG);
for(count = 0; count < (320 * 240); count++)
{
LCD_WriteData(0x0000);
}
// Set text cursor to top left of screen
LCD_SetCursor(0, 0);
// Set default text color to white
LCD_SetTextColor(255, 255, 255);
}
// ************** convertColor ****************************
// - Converts 8-8-8 RGB values into 5-6-5 RGB
// ********************************************************
unsigned short convertColor(unsigned char r, unsigned char g, unsigned char b){
return ((r>>3)<<11) | ((g>>2)<<5) | (b>>3);
}
// ************** LCD_ColorFill ***************************
// - Fills the screen with the specified color
// ********************************************************
void LCD_ColorFill(unsigned short color){
LCD_DrawFilledRect(0, 0, LCD_WIDTH, LCD_HEIGHT, color);
}
// ************** abs *************************************
// - Returns the absolute value of an integer
// - Used to help with circle drawing
// ********************************************************
int abs(int a){
if (a < 0) return -a;
else return a;
}
///////////////////////////////////////////////////////////////////////////////////////////////////
// PRINTING FUNCTIONS //
///////////////////////////////////////////////////////////////////////////////////////////////////
// ************** LCD_PrintChar ***************************
// - Prints a character to the screen
// ********************************************************
void LCD_PrintChar(unsigned char data){
unsigned char i,j,tempData;
// Return cursor to new line if requested
if (data == '\n') {
LCD_SetCursor(0, cursorY + 9);
}
// Don't print characters outside of this range
if (data < 0x20 || data > 0x7e) return;
// If character would print beyond LCD_WIDTH, go to new line
if (cursorX + 5 >= LCD_WIDTH) {
LCD_SetCursor(0, cursorY + 9);
}
// If character would print beyond LCD_HEIGHT, return to top of screen
if (cursorY + 8 >= LCD_HEIGHT) {
LCD_SetCursor(cursorX, 0);
}
// Print our character
for(i=0; i<5; i=i+1){
tempData = ASCII[data - 0x20][i];
for (j=0; j<8; j=j+1){
// This would print transparent letters
// if (tempData & 0x01) {
// LCD_DrawPixel(cursorX + i, cursorY + j, textColor);
// }
// This will overwrite the entire character block (non-transparent)
LCD_DrawPixel(cursorX + i, cursorY + j, (tempData & 0x01) * textColor);
// Shift to our next pixel
tempData = tempData >> 1;
}
}
// Set cursor to next location
LCD_SetCursor(cursorX + 6, cursorY);
}
// ************** LCD_PrintString *************************
// - Prints a string to the screen
// ********************************************************
void LCD_PrintString(char data[]){
unsigned short i = 0;
// While data[i] is not a null terminator, print out characters
while (data[i] != 0){
LCD_PrintChar(data[i]);
i += 1;
}
}
// ************** LCD_SetCursor ***************************
// - Sets character printing cursor position
// ********************************************************
void LCD_SetCursor(unsigned short xPos, unsigned short yPos){
// Set the X address of the display cursor.
cursorX = xPos;
// LCD_WriteCommand(SSD2119_X_RAM_ADDR_REG);
// LCD_WriteData(xPos);
// Set the Y address of the display cursor.
cursorY = yPos;
// LCD_WriteCommand(SSD2119_Y_RAM_ADDR_REG);
// LCD_WriteData(yPos);
}
// ************** LCD_Goto ********************************
// - Sets character printing cursor position in terms of
// character positions rather than pixels.
// - Ignores invalid position requests.
// ********************************************************
void LCD_Goto(unsigned char x, unsigned char y){
if (x > MAX_CHARS_X - 1 || y > MAX_CHARS_Y - 1) return;
LCD_SetCursor(x * 6, y * 9);
}
// ************** LCD_SetTextColor ************************
// - Sets the color that characters will be printed in
// ********************************************************
void LCD_SetTextColor(unsigned char r, unsigned char g, unsigned char b){
textColor = convertColor(r, g, b);
}
// ************** printf **********************************
// - Basic printf() implementation
// - Adapted from Craig Chase, EE312 printf() case study
// - Supports:
// - %d Signed decimal integer
// - %c Character
// - %s String of characters
// - %f Decimal floating point (NYI)
// - %x Unsigned hexadecimal integer
// - %b Binary integer
// - %% A single % output
// ********************************************************
/*
void printf(char fmt[], ...) {
unsigned char k = 0;
void* next_arg = &fmt + 1;
while (fmt[k] != 0) {
if (fmt[k] == '%') { // Special escape, look for next arg
if (fmt[k+1] == 'd') { // Display integer
long* p = (long*) next_arg;
long x = *p;
next_arg = p + 1;
LCD_PrintInteger(x);
} else if (fmt[k+1] == 'c') { // Display character
long* p = (long*) next_arg;
char x = *p;
next_arg = p + 1;
LCD_PrintChar(x);
} else if (fmt[k+1] == 's') { // Display string
char** p = (char**) next_arg;
char* x = *p;
next_arg = p + 1;
LCD_PrintString(x);
} else if (fmt[k+1] == 'f') { // Display float (not yet working)
float* p = (float*) next_arg;
float x = *p;
next_arg = p + 1;
LCD_PrintFloat(x);
} else if (fmt[k+1] == 'x') { // Display hexadecimal
long* p = (long*) next_arg;
long x = *p;
next_arg = p + 1;
LCD_PrintHex(x);
} else if (fmt[k+1] == 'b') { // Display binary
long* p = (long*) next_arg;
long x = *p;
next_arg = p + 1;
LCD_PrintBinary(x);
} else if (fmt[k+1] == '%') { // Display '%'
LCD_PrintChar('%');
} else {
// Otherwise, just ignore the unrecognized escape
}
k = k + 2;
} else { // Normal output, just print the character
LCD_PrintChar(fmt[k]);
k = k + 1;
}
}
}
*/
// ************** LCD_PrintInteger ************************
// - Prints a signed integer to the screen
// ********************************************************
void LCD_PrintInteger(long n){
unsigned char i = 0;
unsigned char sign = ' ';
unsigned char tempString[16];
// If our number is 0, print 0
if (n == 0) {
LCD_PrintChar('0');
return;
}
// If our number is negative, remember and unsign it
if(n < 0){
n = -n;
sign = '-';
}
// Build our number string via repeated division
while (n > 0){
tempString[i] = (n % 10) + 48;
n = n / 10;
i += 1;
}
// Apply our sign if necessary
if (sign == '-'){
LCD_PrintChar('-');
}
// Print out our string in reverse order
while (i){
LCD_PrintChar(tempString[i-1]);
i -= 1;
}
}
// ************** LCD_PrintHex ****************************
// - Prints a number in hexidecimal format
// ********************************************************
void LCD_PrintHex(unsigned long n){
unsigned char i = 0;
unsigned char tempString[16];
// Print hex prefix
LCD_PrintString("0x");
// If our number is 0, print 0
if (n == 0) {
LCD_PrintString("00");
return;
}
// Build hexidecimal string via repeated division
while (n > 0){
tempString[i] = (n % 16) + 48;
if (tempString[i] > 57) tempString[i] += 7;
n = n / 16;
i += 1;
}
// Print an even number of zeros
if (i & 0x01) {
tempString[i] = '0';
i += 1;
}
// Print out our string in reverse order
while (i){
LCD_PrintChar(tempString[i-1]);
i -= 1;
}
}
// ************** LCD_PrintBinary *************************
// - Prints a number in binary format
// ********************************************************
void LCD_PrintBinary(unsigned long n){
unsigned char i = 0;
unsigned char j = 0;
unsigned char tempString[32];
// Print binary prefix
LCD_PrintString("0b");
// If our number is 0, print 0
if (n == 0) {
LCD_PrintString("0000");
return;
}
// Build hexidecimal string via repeated division
while (n > 0){
tempString[i] = (n % 2) + 48;
n = n / 2;
i += 1;
}
// Print in nibbles
for (j = 0; j < (i % 4); j++){
tempString[i] = '0';
i += 1;
}
// Print out our string in reverse order
while (i){
LCD_PrintChar(tempString[i-1]);
i -= 1;
// add nibble seperators
if (i % 4 == 0 && i != 0) LCD_PrintChar('.');
}
}
// ************** LCD_PrintFloat **************************
// - Prints a floating point number (doesn't work right now)
// ********************************************************
void LCD_PrintFloat(float num){
long temp;
// Decode exponent
printf ("binary = %b\n", num);
printf ("hex = %x\n", num);
temp = ((long)num);
printf ("exponent = %d\n", temp);
LCD_PrintChar('\n');
// temp = (long)(num*(1<<12));
// printf("%d.%d", temp>>12, (temp&0xFFF)*1000/(1<<12));
}
///////////////////////////////////////////////////////////////////////////////////////////////////
// DRAWING FUNCTIONS //
///////////////////////////////////////////////////////////////////////////////////////////////////
// ************** LCD_DrawPixel ***************************
// - Draws a 16-bit pixel on the screen
// ********************************************************
void LCD_DrawPixel(unsigned short x, unsigned short y, unsigned short color)
{
// Set the X address of the display cursor.
LCD_WriteCommand(SSD2119_X_RAM_ADDR_REG);
LCD_WriteData(x);
// Set the Y address of the display cursor.
LCD_WriteCommand(SSD2119_Y_RAM_ADDR_REG);
LCD_WriteData(y);
// Write the pixel value.
LCD_WriteCommand(SSD2119_RAM_DATA_REG);
LCD_WriteData(color);
}
// ************** LCD_DrawPixelRGB ************************
// - Draws a 16-bit representation of a 24-bit color pixel
// ********************************************************
void LCD_DrawPixelRGB(unsigned short x, unsigned short y, unsigned char r, unsigned char g, unsigned char b){
LCD_DrawPixel(x, y, convertColor(r, g, b));
}
// ************** LCD_DrawLine ****************************
// - Draws a line using the Bresenham line algrorithm from
// http://rosettacode.org/wiki/Bitmap/Bresenham%27s_line_algorithm
// ********************************************************
void LCD_DrawLine(unsigned short startX, unsigned short startY, unsigned short endX, unsigned short endY, unsigned short color){
short x0 = startX;
short x1 = endX;
short y0 = startY;
short y1 = endY;
short dx = abs(x1-x0), sx = x0<x1 ? 1 : -1;
short dy = abs(y1-y0), sy = y0<y1 ? 1 : -1;
short err = (dx>dy ? dx : -dy)/2, e2;
for(;;){
LCD_DrawPixel(x0, y0, color);
if (x0==x1 && y0==y1) break;
e2 = err;
if (e2 >-dx) { err -= dy; x0 += sx; }
if (e2 < dy) { err += dx; y0 += sy; }
}
}
// ************** LCD_DrawRect ****************************
// - Draws a rectangle, top left corner at (x,y)
// ********************************************************
void LCD_DrawRect(unsigned short x, unsigned short y, short width, short height, unsigned short color){
LCD_DrawLine(x, y, x + width, y, color);
LCD_DrawLine(x, y + 1, x, y + height - 1, color);
LCD_DrawLine(x, y + height, x + width, y + height, color);
LCD_DrawLine(x + width, y + 1, x + width, y + height - 1, color);
}
// ************** LCD_DrawFilledRect **********************
// - Draws a filled rectangle, top left corner at (x,y)
// ********************************************************
void LCD_DrawFilledRect(unsigned short x, unsigned short y, short width, short height, unsigned short color){
int i, j;
for (i = 0; i < height; i++) {
// Set the X address of the display cursor.
LCD_WriteCommand(SSD2119_X_RAM_ADDR_REG);
LCD_WriteData(x);
// Set the Y address of the display cursor.
LCD_WriteCommand(SSD2119_Y_RAM_ADDR_REG);
LCD_WriteData(y + i);
LCD_WriteCommand(SSD2119_RAM_DATA_REG);
for (j = 0; j < width; j++) {
LCD_WriteData(color);
}
}
}
// ************** LCD_DrawCircle **************************
// - Draws a circle centered at (x0, y0)
// ********************************************************
void LCD_DrawCircle(unsigned short x0, unsigned short y0, unsigned short radius, short color){
int f = 1 - radius;
int ddF_x = 1;
int ddF_y = -2 * radius;
int x = 0;
int y = radius;
LCD_DrawPixel(x0, y0 + radius, color);
LCD_DrawPixel(x0, y0 - radius, color);
LCD_DrawPixel(x0 + radius, y0, color);
LCD_DrawPixel(x0 - radius, y0, color);
while(x < y)
{
// ddF_x == 2 * x + 1;
// ddF_y == -2 * y;
// f == x*x + y*y - radius*radius + 2*x - y + 1;
if(f >= 0)
{
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
LCD_DrawPixel(x0 + x, y0 + y, color);
LCD_DrawPixel(x0 - x, y0 + y, color);
LCD_DrawPixel(x0 + x, y0 - y, color);
LCD_DrawPixel(x0 - x, y0 - y, color);
LCD_DrawPixel(x0 + y, y0 + x, color);
LCD_DrawPixel(x0 - y, y0 + x, color);
LCD_DrawPixel(x0 + y, y0 - x, color);
LCD_DrawPixel(x0 - y, y0 - x, color);
}
}
// ************** LCD_DrawFilledCircle ********************
// - Draws a filled circle centered at (x0, y0)
// ********************************************************
void LCD_DrawFilledCircle(unsigned short x0, unsigned short y0, unsigned short radius, short color){
short x = radius, y = 0;
short radiusError = 1-x;
short i = 0;
while(x >= y)
{
//LCD_DrawLine(x0 + x, y0 + y, x0 - x, y0 + y, color);
for (i = x0 - x; i < x0 + x; i++){
LCD_DrawPixel(i, y0 + y, color);
}
//LCD_DrawLine(x0 + x, y0 - y, x0 - x, y0 - y, color);
for (i = x0 - x; i < x0 + x; i++){
LCD_DrawPixel(i, y0 - y, color);
}
//LCD_DrawLine(x0 + y, y0 + x, x0 + y, y0 - x, color);
for (i = y0 - x; i < y0 + x; i++){
LCD_DrawPixel(x0 + y, i, color);
}
//LCD_DrawLine(x0 - y, y0 + x, x0 - y, y0 - x, color);
for (i = y0 - x; i < y0 + x; i++){
LCD_DrawPixel(x0 - y, i, color);
}
y++;
// Calculate whether we need to move inward a pixel
if(radiusError<0) {
radiusError += 2*y+1;
} else {
x--;
radiusError += 2*(y-x+1);
}
}
}
// ************** LCD_DrawImage ***************************
// - Draws an image from memory
// - Image format is a plain byte array (no metadata)
// - User must specify:
// - pointer to image data
// - x, y location to draw image
// - width and height of image
// - bpp (bits per pixel) of image
// - currently supports 4 and 8 bpp image data
// ********************************************************
void LCD_DrawImage(const unsigned char imgPtr[], unsigned short x, unsigned short y, unsigned short width, unsigned short height, unsigned char bpp){
short i, j, pixelCount;
pixelCount = 0;
for (i = 0; i < height; i++) {
// Set the X address of the display cursor.
LCD_WriteCommand(SSD2119_X_RAM_ADDR_REG);
LCD_WriteData(x);
// Set the Y address of the display cursor.
LCD_WriteCommand(SSD2119_Y_RAM_ADDR_REG);
LCD_WriteData(y + i);
LCD_WriteCommand(SSD2119_RAM_DATA_REG);
switch (bpp){
case 4:
{
for (j = 0; j < width/2; j++) {
unsigned char pixelData = imgPtr[pixelCount];
LCD_WriteData(CONVERT4BPP((pixelData&0xF0)>>4));
LCD_WriteData(CONVERT4BPP(pixelData&0x0F));
pixelCount++;
}
} break;
case 8:
{
for (j = 0; j < width; j++) {
char pixelData = *imgPtr + (i*j) + j;
LCD_WriteData( CONVERT8BPP(j) );
LCD_WriteData( CONVERT8BPP(pixelData&0x0F) );
}
}
};
}
}
// ************** LCD_DrawBMP *****************************
// - Draws an image from memory
// - Image format is a BMP image stored in a byte array
// - Function attempts to resolve the following metadata
// from the BMP format
// - width
// - height
// - bpp
// - location of image data within bmp data
// - User must specify:
// - pointer to image data
// - x, y location to draw image
// ********************************************************
void LCD_DrawBMP(const unsigned char* imgPtr, unsigned short x, unsigned short y){
short i, j, bpp;
long width, height, dataOffset;
const unsigned char* pixelOffset;
// read BMP metadata
width = *(imgPtr + BMP_WIDTH_OFFSET);
height = *(imgPtr + BMP_HEIGHT_OFFSET);
bpp = *(imgPtr + BMP_BPP_OFFSET);
dataOffset = *(imgPtr + BMP_DATA_OFFSET);
// debug info
// printf("height: %d, width: %d, bpp %d", height, width, bpp);
// setup pixel pointer
pixelOffset = imgPtr + dataOffset;
for (i = 0; i < height; i++) {
// Set the X address of the display cursor.
LCD_WriteCommand(SSD2119_X_RAM_ADDR_REG);
LCD_WriteData(x);
// Set the Y address of the display cursor.
LCD_WriteCommand(SSD2119_Y_RAM_ADDR_REG);
LCD_WriteData(y + height - i);
LCD_WriteCommand(SSD2119_RAM_DATA_REG);
switch(bpp){
case 1:
{ // unknown if working yet
for (j = 0; j < width/8; j++) {
unsigned char pixelData = *(pixelOffset);
LCD_WriteData((pixelData&0x80)*0xFFFF);
LCD_WriteData((pixelData&0x40)*0xFFFF);
LCD_WriteData((pixelData&0x20)*0xFFFF);
LCD_WriteData((pixelData&0x10)*0xFFFF);
LCD_WriteData((pixelData&0x08)*0xFFFF);
LCD_WriteData((pixelData&0x04)*0xFFFF);
LCD_WriteData((pixelData&0x02)*0xFFFF);
LCD_WriteData((pixelData&0x01)*0xFFFF);
pixelOffset++;
}break;
}
case 4:
{ // working?
for (j = 0; j < width/2; j++) {
unsigned char pixelData = *(pixelOffset);
// LCD_WriteData( CONVERT4BPP((pixelData&0xF0)>>4) );
// LCD_WriteData( CONVERT4BPP(pixelData&0x0F) );
LCD_WriteData( Color4[(pixelData&0xF0)>>4] );
LCD_WriteData( Color4[pixelData&0x0F] );
pixelOffset++;
} break;
}
case 24:
{ // seems to work
for (j = 0; j < width; j++) {
// read 24bit RGB value into pixelData
unsigned long pixelData = *(pixelOffset) | *(pixelOffset + 1) << 8 | *(pixelOffset + 2) << 16;
// write RGB value to screen (passed through conversion macro)
LCD_WriteData( CONVERT24BPP(pixelData) );
// increment pixel data pointer to next 24bit value
pixelOffset += 3;
}
}
}
}
}
#define TOUCH_YN (*((volatile unsigned long *)0x40004010)) // PA2
#define TOUCH_XP (*((volatile unsigned long *)0x40004020)) // PA3
#define TOUCH_XN (*((volatile unsigned long *)0x40024040)) // PE4 / AIN9
#define TOUCH_YP (*((volatile unsigned long *)0x40024080)) // PE5 / AIN8
#define PA2 0x04
#define PA3 0x08
#define PE4 0x10
#define PE5 0x20
#define NUM_SAMPLES 4
#define NUM_VALS_TO_AVG 8
#define XVAL_MIN 100
#define YVAL_MIN 150
unsigned char Touch_WaitForInput = 0;
short Touch_XVal;
short Touch_YVal;
void DisableInterrupts(void); // Disable interrupts
void EnableInterrupts(void); // Enable interrupts
//short xVals[NUM_VALS_TO_AVG];
//short yVals[NUM_VALS_TO_AVG];
//unsigned char filterCounter = 0;
//unsigned char numVals = 0;
// YP / PE5 / AIN8
// ---------------------
// | |
// XP | | XN