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LCD.c
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LCD.c
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#include <stdint.h>
#include "LCD.h"
#include "os.h"
#include "tm4c123gh6pm.h"
void DisableInterrupts(void); // Disable interrupts
void EnableInterrupts(void); // Enable interrupts
long StartCritical (void); // previous I bit, disable interrupts
void EndCritical(long sr); // restore I bit to previous value
void WaitForInterrupt(void); // low power mode
// This section is based on ST7735.c, which itself is based
// on example code originally from Adafruit. Some sections
// such as the font table and initialization functions were
// copied verbatim from Adafruit's example and are subject
// to the following disclosure.
/***************************************************
This is a library for the Adafruit 1.8" SPI display.
This library works with the Adafruit 1.8" TFT Breakout w/SD card
----> http://www.adafruit.com/products/358
as well as Adafruit raw 1.8" TFT displayun
----> http://www.adafruit.com/products/618
Check out the links above for our tutorials and wiring diagrams
These displays use SPI to communicate, 4 or 5 pins are required to
interface (RST is optional)
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
MIT license, all text above must be included in any redistribution
****************************************************/
// some flags for ST7735_InitR()
enum initRFlags{
none,
INITR_GREENTAB,
INITR_REDTAB,
INITR_BLACKTAB
};
#define ST7735_TFTWIDTH 128
#define ST7735_TFTHEIGHT 128
// Color definitions
#define ST7735_BLACK 0x0000
#define ST7735_BLUE 0x001F
#define ST7735_RED 0xF800
#define ST7735_GREEN 0x07E0
#define ST7735_CYAN 0x07FF
#define ST7735_MAGENTA 0xF81F
#define ST7735_YELLOW 0xFFE0
#define ST7735_WHITE 0xFFFF
// 12 rows (0 to 11) and 21 characters (0 to 20)
// Requires (11 + size*size*6*8) bytes of transmission for each character
uint32_t StX=0; // position along the horizonal axis 0 to 20
uint32_t StY=0; // position along the vertical axis 0 to 11
uint16_t StTextColor = ST7735_YELLOW;
#define ST7735_NOP 0x00
#define ST7735_SWRESET 0x01
#define ST7735_RDDID 0x04
#define ST7735_RDDST 0x09
#define ST7735_SLPIN 0x10
#define ST7735_SLPOUT 0x11
#define ST7735_PTLON 0x12
#define ST7735_NORON 0x13
#define ST7735_INVOFF 0x20
#define ST7735_INVON 0x21
#define ST7735_DISPOFF 0x28
#define ST7735_DISPON 0x29
#define ST7735_CASET 0x2A
#define ST7735_RASET 0x2B
#define ST7735_RAMWR 0x2C
#define ST7735_RAMRD 0x2E
#define ST7735_PTLAR 0x30
#define ST7735_COLMOD 0x3A
#define ST7735_MADCTL 0x36
#define ST7735_FRMCTR1 0xB1
#define ST7735_FRMCTR2 0xB2
#define ST7735_FRMCTR3 0xB3
#define ST7735_INVCTR 0xB4
#define ST7735_DISSET5 0xB6
#define ST7735_PWCTR1 0xC0
#define ST7735_PWCTR2 0xC1
#define ST7735_PWCTR3 0xC2
#define ST7735_PWCTR4 0xC3
#define ST7735_PWCTR5 0xC4
#define ST7735_VMCTR1 0xC5
#define ST7735_RDID1 0xDA
#define ST7735_RDID2 0xDB
#define ST7735_RDID3 0xDC
#define ST7735_RDID4 0xDD
#define ST7735_PWCTR6 0xFC
#define ST7735_GMCTRP1 0xE0
#define ST7735_GMCTRN1 0xE1
#define TFT_CS (*((volatile uint32_t *)0x40004040)) /* PA4 */
#define TFT_CS_LOW 0x00
#define TFT_CS_HIGH 0x10
#define DC (*((volatile uint32_t *)0x40025040)) /* PF4 */
#define DC_COMMAND 0x00
#define DC_DATA 0x10
#define RESET (*((volatile uint32_t *)0x40025004)) /* PF0 */
#define RESET_LOW 0x00
#define RESET_HIGH 0x01
// standard ascii 5x7 font
// originally from glcdfont.c from Adafruit project
static const uint8_t Font[] = {
0x00, 0x00, 0x00, 0x00, 0x00,
0x3E, 0x5B, 0x4F, 0x5B, 0x3E,
0x3E, 0x6B, 0x4F, 0x6B, 0x3E,
0x1C, 0x3E, 0x7C, 0x3E, 0x1C,
0x18, 0x3C, 0x7E, 0x3C, 0x18,
0x1C, 0x57, 0x7D, 0x57, 0x1C,
0x1C, 0x5E, 0x7F, 0x5E, 0x1C,
0x00, 0x18, 0x3C, 0x18, 0x00,
0xFF, 0xE7, 0xC3, 0xE7, 0xFF,
0x00, 0x18, 0x24, 0x18, 0x00,
0xFF, 0xE7, 0xDB, 0xE7, 0xFF,
0x30, 0x48, 0x3A, 0x06, 0x0E,
0x26, 0x29, 0x79, 0x29, 0x26,
0x40, 0x7F, 0x05, 0x05, 0x07,
0x40, 0x7F, 0x05, 0x25, 0x3F,
0x5A, 0x3C, 0xE7, 0x3C, 0x5A,
0x7F, 0x3E, 0x1C, 0x1C, 0x08,
0x08, 0x1C, 0x1C, 0x3E, 0x7F,
0x14, 0x22, 0x7F, 0x22, 0x14,
0x5F, 0x5F, 0x00, 0x5F, 0x5F,
0x06, 0x09, 0x7F, 0x01, 0x7F,
0x00, 0x66, 0x89, 0x95, 0x6A,
0x60, 0x60, 0x60, 0x60, 0x60,
0x94, 0xA2, 0xFF, 0xA2, 0x94,
0x08, 0x04, 0x7E, 0x04, 0x08,
0x10, 0x20, 0x7E, 0x20, 0x10,
0x08, 0x08, 0x2A, 0x1C, 0x08,
0x08, 0x1C, 0x2A, 0x08, 0x08,
0x1E, 0x10, 0x10, 0x10, 0x10,
0x0C, 0x1E, 0x0C, 0x1E, 0x0C,
0x30, 0x38, 0x3E, 0x38, 0x30,
0x06, 0x0E, 0x3E, 0x0E, 0x06,
0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x5F, 0x00, 0x00,
0x00, 0x07, 0x00, 0x07, 0x00,
0x14, 0x7F, 0x14, 0x7F, 0x14,
0x24, 0x2A, 0x7F, 0x2A, 0x12,
0x23, 0x13, 0x08, 0x64, 0x62,
0x36, 0x49, 0x56, 0x20, 0x50,
0x00, 0x08, 0x07, 0x03, 0x00,
0x00, 0x1C, 0x22, 0x41, 0x00,
0x00, 0x41, 0x22, 0x1C, 0x00,
0x2A, 0x1C, 0x7F, 0x1C, 0x2A,
0x08, 0x08, 0x3E, 0x08, 0x08,
0x00, 0x80, 0x70, 0x30, 0x00,
0x08, 0x08, 0x08, 0x08, 0x08,
0x00, 0x00, 0x60, 0x60, 0x00,
0x20, 0x10, 0x08, 0x04, 0x02,
0x3E, 0x51, 0x49, 0x45, 0x3E, // 0
0x00, 0x42, 0x7F, 0x40, 0x00, // 1
0x72, 0x49, 0x49, 0x49, 0x46, // 2
0x21, 0x41, 0x49, 0x4D, 0x33, // 3
0x18, 0x14, 0x12, 0x7F, 0x10, // 4
0x27, 0x45, 0x45, 0x45, 0x39, // 5
0x3C, 0x4A, 0x49, 0x49, 0x31, // 6
0x41, 0x21, 0x11, 0x09, 0x07, // 7
0x36, 0x49, 0x49, 0x49, 0x36, // 8
0x46, 0x49, 0x49, 0x29, 0x1E, // 9
0x00, 0x00, 0x14, 0x00, 0x00,
0x00, 0x40, 0x34, 0x00, 0x00,
0x00, 0x08, 0x14, 0x22, 0x41,
0x14, 0x14, 0x14, 0x14, 0x14,
0x00, 0x41, 0x22, 0x14, 0x08,
0x02, 0x01, 0x59, 0x09, 0x06,
0x3E, 0x41, 0x5D, 0x59, 0x4E,
0x7C, 0x12, 0x11, 0x12, 0x7C, // A
0x7F, 0x49, 0x49, 0x49, 0x36, // B
0x3E, 0x41, 0x41, 0x41, 0x22, // C
0x7F, 0x41, 0x41, 0x41, 0x3E, // D
0x7F, 0x49, 0x49, 0x49, 0x41, // E
0x7F, 0x09, 0x09, 0x09, 0x01, // F
0x3E, 0x41, 0x41, 0x51, 0x73, // G
0x7F, 0x08, 0x08, 0x08, 0x7F, // H
0x00, 0x41, 0x7F, 0x41, 0x00, // I
0x20, 0x40, 0x41, 0x3F, 0x01, // J
0x7F, 0x08, 0x14, 0x22, 0x41, // K
0x7F, 0x40, 0x40, 0x40, 0x40, // L
0x7F, 0x02, 0x1C, 0x02, 0x7F, // M
0x7F, 0x04, 0x08, 0x10, 0x7F, // N
0x3E, 0x41, 0x41, 0x41, 0x3E, // O
0x7F, 0x09, 0x09, 0x09, 0x06, // P
0x3E, 0x41, 0x51, 0x21, 0x5E, // Q
0x7F, 0x09, 0x19, 0x29, 0x46, // R
0x26, 0x49, 0x49, 0x49, 0x32, // S
0x03, 0x01, 0x7F, 0x01, 0x03, // T
0x3F, 0x40, 0x40, 0x40, 0x3F, // U
0x1F, 0x20, 0x40, 0x20, 0x1F, // V
0x3F, 0x40, 0x38, 0x40, 0x3F, // W
0x63, 0x14, 0x08, 0x14, 0x63, // X
0x03, 0x04, 0x78, 0x04, 0x03, // Y
0x61, 0x59, 0x49, 0x4D, 0x43, // Z
0x00, 0x7F, 0x41, 0x41, 0x41,
0x02, 0x04, 0x08, 0x10, 0x20,
0x00, 0x41, 0x41, 0x41, 0x7F,
0x04, 0x02, 0x01, 0x02, 0x04,
0x40, 0x40, 0x40, 0x40, 0x40,
0x00, 0x03, 0x07, 0x08, 0x00,
0x20, 0x54, 0x54, 0x78, 0x40, // a
0x7F, 0x28, 0x44, 0x44, 0x38, // b
0x38, 0x44, 0x44, 0x44, 0x28, // c
0x38, 0x44, 0x44, 0x28, 0x7F, // d
0x38, 0x54, 0x54, 0x54, 0x18, // e
0x00, 0x08, 0x7E, 0x09, 0x02, // f
0x18, 0xA4, 0xA4, 0x9C, 0x78, // g
0x7F, 0x08, 0x04, 0x04, 0x78, // h
0x00, 0x44, 0x7D, 0x40, 0x00, // i
0x20, 0x40, 0x40, 0x3D, 0x00, // j
0x7F, 0x10, 0x28, 0x44, 0x00, // k
0x00, 0x41, 0x7F, 0x40, 0x00, // l
0x7C, 0x04, 0x78, 0x04, 0x78, // m
0x7C, 0x08, 0x04, 0x04, 0x78, // n
0x38, 0x44, 0x44, 0x44, 0x38, // o
0xFC, 0x18, 0x24, 0x24, 0x18, // p
0x18, 0x24, 0x24, 0x18, 0xFC, // q
0x7C, 0x08, 0x04, 0x04, 0x08, // r
0x48, 0x54, 0x54, 0x54, 0x24, // s
0x04, 0x04, 0x3F, 0x44, 0x24, // t
0x3C, 0x40, 0x40, 0x20, 0x7C, // u
0x1C, 0x20, 0x40, 0x20, 0x1C, // v
0x3C, 0x40, 0x30, 0x40, 0x3C, // w
0x44, 0x28, 0x10, 0x28, 0x44, // x
0x4C, 0x90, 0x90, 0x90, 0x7C, // y
0x44, 0x64, 0x54, 0x4C, 0x44, // z
0x00, 0x08, 0x36, 0x41, 0x00,
0x00, 0x00, 0x77, 0x00, 0x00,
0x00, 0x41, 0x36, 0x08, 0x00,
0x02, 0x01, 0x02, 0x04, 0x02,
0x3C, 0x26, 0x23, 0x26, 0x3C,
0x1E, 0xA1, 0xA1, 0x61, 0x12,
0x3A, 0x40, 0x40, 0x20, 0x7A,
0x38, 0x54, 0x54, 0x55, 0x59,
0x21, 0x55, 0x55, 0x79, 0x41,
0x21, 0x54, 0x54, 0x78, 0x41,
0x21, 0x55, 0x54, 0x78, 0x40,
0x20, 0x54, 0x55, 0x79, 0x40,
0x0C, 0x1E, 0x52, 0x72, 0x12,
0x39, 0x55, 0x55, 0x55, 0x59,
0x39, 0x54, 0x54, 0x54, 0x59,
0x39, 0x55, 0x54, 0x54, 0x58,
0x00, 0x00, 0x45, 0x7C, 0x41,
0x00, 0x02, 0x45, 0x7D, 0x42,
0x00, 0x01, 0x45, 0x7C, 0x40,
0xF0, 0x29, 0x24, 0x29, 0xF0,
0xF0, 0x28, 0x25, 0x28, 0xF0,
0x7C, 0x54, 0x55, 0x45, 0x00,
0x20, 0x54, 0x54, 0x7C, 0x54,
0x7C, 0x0A, 0x09, 0x7F, 0x49,
0x32, 0x49, 0x49, 0x49, 0x32,
0x32, 0x48, 0x48, 0x48, 0x32,
0x32, 0x4A, 0x48, 0x48, 0x30,
0x3A, 0x41, 0x41, 0x21, 0x7A,
0x3A, 0x42, 0x40, 0x20, 0x78,
0x00, 0x9D, 0xA0, 0xA0, 0x7D,
0x39, 0x44, 0x44, 0x44, 0x39,
0x3D, 0x40, 0x40, 0x40, 0x3D,
0x3C, 0x24, 0xFF, 0x24, 0x24,
0x48, 0x7E, 0x49, 0x43, 0x66,
0x2B, 0x2F, 0xFC, 0x2F, 0x2B,
0xFF, 0x09, 0x29, 0xF6, 0x20,
0xC0, 0x88, 0x7E, 0x09, 0x03,
0x20, 0x54, 0x54, 0x79, 0x41,
0x00, 0x00, 0x44, 0x7D, 0x41,
0x30, 0x48, 0x48, 0x4A, 0x32,
0x38, 0x40, 0x40, 0x22, 0x7A,
0x00, 0x7A, 0x0A, 0x0A, 0x72,
0x7D, 0x0D, 0x19, 0x31, 0x7D,
0x26, 0x29, 0x29, 0x2F, 0x28,
0x26, 0x29, 0x29, 0x29, 0x26,
0x30, 0x48, 0x4D, 0x40, 0x20,
0x38, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x38,
0x2F, 0x10, 0xC8, 0xAC, 0xBA,
0x2F, 0x10, 0x28, 0x34, 0xFA,
0x00, 0x00, 0x7B, 0x00, 0x00,
0x08, 0x14, 0x2A, 0x14, 0x22,
0x22, 0x14, 0x2A, 0x14, 0x08,
0xAA, 0x00, 0x55, 0x00, 0xAA,
0xAA, 0x55, 0xAA, 0x55, 0xAA,
0x00, 0x00, 0x00, 0xFF, 0x00,
0x10, 0x10, 0x10, 0xFF, 0x00,
0x14, 0x14, 0x14, 0xFF, 0x00,
0x10, 0x10, 0xFF, 0x00, 0xFF,
0x10, 0x10, 0xF0, 0x10, 0xF0,
0x14, 0x14, 0x14, 0xFC, 0x00,
0x14, 0x14, 0xF7, 0x00, 0xFF,
0x00, 0x00, 0xFF, 0x00, 0xFF,
0x14, 0x14, 0xF4, 0x04, 0xFC,
0x14, 0x14, 0x17, 0x10, 0x1F,
0x10, 0x10, 0x1F, 0x10, 0x1F,
0x14, 0x14, 0x14, 0x1F, 0x00,
0x10, 0x10, 0x10, 0xF0, 0x00,
0x00, 0x00, 0x00, 0x1F, 0x10,
0x10, 0x10, 0x10, 0x1F, 0x10,
0x10, 0x10, 0x10, 0xF0, 0x10,
0x00, 0x00, 0x00, 0xFF, 0x10,
0x10, 0x10, 0x10, 0x10, 0x10,
0x10, 0x10, 0x10, 0xFF, 0x10,
0x00, 0x00, 0x00, 0xFF, 0x14,
0x00, 0x00, 0xFF, 0x00, 0xFF,
0x00, 0x00, 0x1F, 0x10, 0x17,
0x00, 0x00, 0xFC, 0x04, 0xF4,
0x14, 0x14, 0x17, 0x10, 0x17,
0x14, 0x14, 0xF4, 0x04, 0xF4,
0x00, 0x00, 0xFF, 0x00, 0xF7,
0x14, 0x14, 0x14, 0x14, 0x14,
0x14, 0x14, 0xF7, 0x00, 0xF7,
0x14, 0x14, 0x14, 0x17, 0x14,
0x10, 0x10, 0x1F, 0x10, 0x1F,
0x14, 0x14, 0x14, 0xF4, 0x14,
0x10, 0x10, 0xF0, 0x10, 0xF0,
0x00, 0x00, 0x1F, 0x10, 0x1F,
0x00, 0x00, 0x00, 0x1F, 0x14,
0x00, 0x00, 0x00, 0xFC, 0x14,
0x00, 0x00, 0xF0, 0x10, 0xF0,
0x10, 0x10, 0xFF, 0x10, 0xFF,
0x14, 0x14, 0x14, 0xFF, 0x14,
0x10, 0x10, 0x10, 0x1F, 0x00,
0x00, 0x00, 0x00, 0xF0, 0x10,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xF0, 0xF0, 0xF0, 0xF0, 0xF0,
0xFF, 0xFF, 0xFF, 0x00, 0x00,
0x00, 0x00, 0x00, 0xFF, 0xFF,
0x0F, 0x0F, 0x0F, 0x0F, 0x0F,
0x38, 0x44, 0x44, 0x38, 0x44,
0x7C, 0x2A, 0x2A, 0x3E, 0x14,
0x7E, 0x02, 0x02, 0x06, 0x06,
0x02, 0x7E, 0x02, 0x7E, 0x02,
0x63, 0x55, 0x49, 0x41, 0x63,
0x38, 0x44, 0x44, 0x3C, 0x04,
0x40, 0x7E, 0x20, 0x1E, 0x20,
0x06, 0x02, 0x7E, 0x02, 0x02,
0x99, 0xA5, 0xE7, 0xA5, 0x99,
0x1C, 0x2A, 0x49, 0x2A, 0x1C,
0x4C, 0x72, 0x01, 0x72, 0x4C,
0x30, 0x4A, 0x4D, 0x4D, 0x30,
0x30, 0x48, 0x78, 0x48, 0x30,
0xBC, 0x62, 0x5A, 0x46, 0x3D,
0x3E, 0x49, 0x49, 0x49, 0x00,
0x7E, 0x01, 0x01, 0x01, 0x7E,
0x2A, 0x2A, 0x2A, 0x2A, 0x2A,
0x44, 0x44, 0x5F, 0x44, 0x44,
0x40, 0x51, 0x4A, 0x44, 0x40,
0x40, 0x44, 0x4A, 0x51, 0x40,
0x00, 0x00, 0xFF, 0x01, 0x03,
0xE0, 0x80, 0xFF, 0x00, 0x00,
0x08, 0x08, 0x6B, 0x6B, 0x08,
0x36, 0x12, 0x36, 0x24, 0x36,
0x06, 0x0F, 0x09, 0x0F, 0x06,
0x00, 0x00, 0x18, 0x18, 0x00,
0x00, 0x00, 0x10, 0x10, 0x00,
0x30, 0x40, 0xFF, 0x01, 0x01,
0x00, 0x1F, 0x01, 0x01, 0x1E,
0x00, 0x19, 0x1D, 0x17, 0x12,
0x00, 0x3C, 0x3C, 0x3C, 0x3C,
0x00, 0x00, 0x00, 0x00, 0x00,
};
static uint8_t ColStart, RowStart; // some displays need this changed
//static uint8_t Rotation; // 0 to 3
//static enum initRFlags TabColor;
static int16_t _width = ST7735_TFTWIDTH; // this could probably be a constant, except it is used in Adafruit_GFX and depends on image rotation
static int16_t _height = ST7735_TFTHEIGHT;
// The Data/Command pin must be valid when the eighth bit is
// sent. The SSI module has hardware input and output FIFOs
// that are 8 locations deep; however, they are not used in
// this implementation. Each function first stalls while
// waiting for any pending SSI2 transfers to complete. Once
// the SSI2 module is idle, it then prepares the Chip Select
// pin for the LCD and the Data/Command pin. Next it starts
// transmitting the data or command. Finally once the
// hardware is idle again, it sets the chip select pin high
// as required by the serial protocol. This is a
// significant change from previous implementations of this
// function. It is less efficient without the FIFOs, but it
// should ensure that the Chip Select and Data/Command pin
// statuses all match the byte that is actually being
// transmitted.
// NOTE: These functions will crash or stall indefinitely if
// the SSI2 module is not initialized and enabled.
// This is a helper function that sends an 8-bit command to the LCD.
// Inputs: c 8-bit code to transmit
// Outputs: 8-bit reply
// Assumes: SSI2 and ports have already been initialized and enabled
uint8_t static writecommand(uint8_t c) {
// wait until SSI2 not busy/transmit FIFO empty
while((SSI2_SR_R&SSI_SR_BSY)==SSI_SR_BSY){};
TFT_CS = TFT_CS_LOW;
DC = DC_COMMAND;
SSI2_DR_R = c; // data out
while((SSI2_SR_R&SSI_SR_RNE)==0){}; // wait until response
TFT_CS = TFT_CS_HIGH;
return (uint8_t)SSI2_DR_R; // return the response
}
// This is a helper function that sends a piece of 8-bit data to the LCD.
// Inputs: c 8-bit data to transmit
// Outputs: 8-bit reply
// Assumes: SSI2 and ports have already been initialized and enabled
uint8_t static writedata(uint8_t c) {
// wait until SSI2 not busy/transmit FIFO empty
while((SSI2_SR_R&SSI_SR_BSY)==SSI_SR_BSY){};
TFT_CS = TFT_CS_LOW;
DC = DC_DATA;
SSI2_DR_R = c; // data out
while((SSI2_SR_R&SSI_SR_RNE)==0){}; // wait until response
TFT_CS = TFT_CS_HIGH;
return (uint8_t)SSI2_DR_R; // return the response
}
// delay function from sysctl.c
// which delays 3.3*ulCount cycles
// ulCount=23746 => 1ms = 23746*3.3cycle/loop/80,000
#ifdef __TI_COMPILER_VERSION__
//Code Composer Studio Code
void parrotdelay(uint32_t ulCount){
__asm ( " subs r0, #1\n"
" bne Delay\n"
" bx lr\n");
}
#else
//Keil uVision Code
__asm void
parrotdelay(uint32_t ulCount)
{
subs r0, #1
bne parrotdelay
bx lr
}
#endif
// Rather than a bazillion writecommand() and writedata() calls, screen
// initialization commands and arguments are organized in these tables
// stored in ROM. The table may look bulky, but that's mostly the
// formatting -- storage-wise this is hundreds of bytes more compact
// than the equivalent code. Companion function follows.
#define DELAY 0x80
//static const uint8_t
// Bcmd[] = { // Initialization commands for 7735B screens
// 18, // 18 commands in list:
// ST7735_SWRESET, DELAY, // 1: Software reset, no args, w/delay
// 50, // 50 ms delay
// ST7735_SLPOUT , DELAY, // 2: Out of sleep mode, no args, w/delay
// 255, // 255 = 500 ms delay
// ST7735_COLMOD , 1+DELAY, // 3: Set color mode, 1 arg + delay:
// 0x05, // 16-bit color
// 10, // 10 ms delay
// ST7735_FRMCTR1, 3+DELAY, // 4: Frame rate control, 3 args + delay:
// 0x00, // fastest refresh
// 0x06, // 6 lines front porch
// 0x03, // 3 lines back porch
// 10, // 10 ms delay
// ST7735_MADCTL , 1 , // 5: Memory access ctrl (directions), 1 arg:
// 0x08, // Row addr/col addr, bottom to top refresh
// ST7735_DISSET5, 2 , // 6: Display settings #5, 2 args, no delay:
// 0x15, // 1 clk cycle nonoverlap, 2 cycle gate
// // rise, 3 cycle osc equalize
// 0x02, // Fix on VTL
// ST7735_INVCTR , 1 , // 7: Display inversion control, 1 arg:
// 0x0, // Line inversion
// ST7735_PWCTR1 , 2+DELAY, // 8: Power control, 2 args + delay:
// 0x02, // GVDD = 4.7V
// 0x70, // 1.0uA
// 10, // 10 ms delay
// ST7735_PWCTR2 , 1 , // 9: Power control, 1 arg, no delay:
// 0x05, // VGH = 14.7V, VGL = -7.35V
// ST7735_PWCTR3 , 2 , // 10: Power control, 2 args, no delay:
// 0x01, // Opamp current small
// 0x02, // Boost frequency
// ST7735_VMCTR1 , 2+DELAY, // 11: Power control, 2 args + delay:
// 0x3C, // VCOMH = 4V
// 0x38, // VCOML = -1.1V
// 10, // 10 ms delay
// ST7735_PWCTR6 , 2 , // 12: Power control, 2 args, no delay:
// 0x11, 0x15,
// ST7735_GMCTRP1,16 , // 13: Magical unicorn dust, 16 args, no delay:
// 0x09, 0x16, 0x09, 0x20, // (seriously though, not sure what
// 0x21, 0x1B, 0x13, 0x19, // these config values represent)
// 0x17, 0x15, 0x1E, 0x2B,
// 0x04, 0x05, 0x02, 0x0E,
// ST7735_GMCTRN1,16+DELAY, // 14: Sparkles and rainbows, 16 args + delay:
// 0x0B, 0x14, 0x08, 0x1E, // (ditto)
// 0x22, 0x1D, 0x18, 0x1E,
// 0x1B, 0x1A, 0x24, 0x2B,
// 0x06, 0x06, 0x02, 0x0F,
// 10, // 10 ms delay
// ST7735_CASET , 4 , // 15: Column addr set, 4 args, no delay:
// 0x00, 0x02, // XSTART = 2
// 0x00, 0x81, // XEND = 129
// ST7735_RASET , 4 , // 16: Row addr set, 4 args, no delay:
// 0x00, 0x02, // XSTART = 1
// 0x00, 0x81, // XEND = 160
// ST7735_NORON , DELAY, // 17: Normal display on, no args, w/delay
// 10, // 10 ms delay
// ST7735_DISPON , DELAY, // 18: Main screen turn on, no args, w/delay
// 255 }; // 255 = 500 ms delay
static const uint8_t
Rcmd1[] = { // Init for 7735R, part 1 (red or green tab)
15, // 15 commands in list:
ST7735_SWRESET, DELAY, // 1: Software reset, 0 args, w/delay
150, // 150 ms delay
ST7735_SLPOUT , DELAY, // 2: Out of sleep mode, 0 args, w/delay
255, // 500 ms delay
ST7735_FRMCTR1, 3 , // 3: Frame rate ctrl - normal mode, 3 args:
0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D)
ST7735_FRMCTR2, 3 , // 4: Frame rate control - idle mode, 3 args:
0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D)
ST7735_FRMCTR3, 6 , // 5: Frame rate ctrl - partial mode, 6 args:
0x01, 0x2C, 0x2D, // Dot inversion mode
0x01, 0x2C, 0x2D, // Line inversion mode
ST7735_INVCTR , 1 , // 6: Display inversion ctrl, 1 arg, no delay:
0x07, // No inversion
ST7735_PWCTR1 , 3 , // 7: Power control, 3 args, no delay:
0xA2,
0x02, // -4.6V
0x84, // AUTO mode
ST7735_PWCTR2 , 1 , // 8: Power control, 1 arg, no delay:
0xC5, // VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD
ST7735_PWCTR3 , 2 , // 9: Power control, 2 args, no delay:
0x0A, // Opamp current small
0x00, // Boost frequency
ST7735_PWCTR4 , 2 , // 10: Power control, 2 args, no delay:
0x8A, // BCLK/2, Opamp current small & Medium low
0x2A,
ST7735_PWCTR5 , 2 , // 11: Power control, 2 args, no delay:
0x8A, 0xEE,
ST7735_VMCTR1 , 1 , // 12: Power control, 1 arg, no delay:
0x0E,
ST7735_INVOFF , 0 , // 13: Don't invert display, no args, no delay
ST7735_MADCTL , 1 , // 14: Memory access control (directions), 1 arg:
0xC8, // row addr/col addr, bottom to top refresh
ST7735_COLMOD , 1 , // 15: set color mode, 1 arg, no delay:
0x05 }; // 16-bit color
static const uint8_t
Rcmd2green[] = { // Init for 7735R, part 2 (green tab only)
2, // 2 commands in list:
ST7735_CASET , 4 , // 1: Column addr set, 4 args, no delay:
0x00, 0x02, // XSTART = 0
0x00, 0x7F+0x02, // XEND = 127
ST7735_RASET , 4 , // 2: Row addr set, 4 args, no delay:
0x00, 0x01, // XSTART = 0
0x00, 0x7F+0x01 }; // XEND = 127
static const uint8_t
Rcmd2red[] = { // Init for 7735R, part 2 (red tab only)
2, // 2 commands in list:
ST7735_CASET , 4 , // 1: Column addr set, 4 args, no delay:
0x00, 0x00, // XSTART = 0
0x00, 0x7F, // XEND = 127
ST7735_RASET , 4 , // 2: Row addr set, 4 args, no delay:
0x00, 0x00, // XSTART = 0
0x00, 0x7F }; // XEND = 127
static const uint8_t
Rcmd3[] = { // Init for 7735R, part 3 (red or green tab)
4, // 4 commands in list:
ST7735_GMCTRP1, 16 , // 1: Magical unicorn dust, 16 args, no delay:
0x02, 0x1c, 0x07, 0x12,
0x37, 0x32, 0x29, 0x2d,
0x29, 0x25, 0x2B, 0x39,
0x00, 0x01, 0x03, 0x10,
ST7735_GMCTRN1, 16 , // 2: Sparkles and rainbows, 16 args, no delay:
0x03, 0x1d, 0x07, 0x06,
0x2E, 0x2C, 0x29, 0x2D,
0x2E, 0x2E, 0x37, 0x3F,
0x00, 0x00, 0x02, 0x10,
ST7735_NORON , DELAY, // 3: Normal display on, no args, w/delay
10, // 10 ms delay
ST7735_DISPON , DELAY, // 4: Main screen turn on, no args w/delay
100 }; // 100 ms delay
// ------------BSP_Delay1ms------------
// Simple delay function which delays about n
// milliseconds.
// Inputs: n number of 1 msec to wait
// Outputs: none
void BSP_Delay1ms(uint32_t n){
while(n){
parrotdelay(23746); // 1 msec, tuned at 80 MHz, originally part of LCD module
n--;
}
}
// Companion code to the above tables. Reads and issues
// a series of LCD commands stored in ROM byte array.
void static commandList(const uint8_t *addr) {
uint8_t numCommands, numArgs;
uint16_t ms;
numCommands = *(addr++); // Number of commands to follow
while(numCommands--) { // For each command...
writecommand(*(addr++)); // Read, issue command
numArgs = *(addr++); // Number of args to follow
ms = numArgs & DELAY; // If hibit set, delay follows args
numArgs &= ~DELAY; // Mask out delay bit
while(numArgs--) { // For each argument...
writedata(*(addr++)); // Read, issue argument
}
if(ms) {
ms = *(addr++); // Read post-command delay time (ms)
if(ms == 255) ms = 500; // If 255, delay for 500 ms
BSP_Delay1ms(ms);
}
}
}
// Initialization code common to both 'B' and 'R' type displays
void static commonInit(const uint8_t *cmdList) {
ColStart = RowStart = 0; // May be overridden in init func
// toggle RST low to reset; CS low so it'll listen to us
// SSI2Fss is not available, so use GPIO on PA4
SYSCTL_RCGCGPIO_R |= 0x00000023; // 1) activate clock for Ports F, B, and A
while((SYSCTL_PRGPIO_R&0x23) != 0x23){};// allow time for clocks to stabilize
GPIO_PORTF_LOCK_R = 0x4C4F434B; // 2a) unlock GPIO Port F
GPIO_PORTF_CR_R = 0x1F; // allow changes to PF4-0
// 2b) no need to unlock PF4, PB7, PB4, or PA4
GPIO_PORTF_AMSEL_R &= ~0x11; // 3a) disable analog on PF4,0
GPIO_PORTB_AMSEL_R &= ~0x90; // 3b) disable analog on PB7,4
GPIO_PORTA_AMSEL_R &= ~0x10; // 3c) disable analog on PA4
// 4a) configure PF4,0 as GPIO
GPIO_PORTF_PCTL_R = (GPIO_PORTF_PCTL_R&0xFFF0FFF0)+0x00000000;
// 4b) configure PB7,4 as SSI
GPIO_PORTB_PCTL_R = (GPIO_PORTB_PCTL_R&0x0FF0FFFF)+0x20020000;
// 4c) configure PA4 as GPIO
GPIO_PORTA_PCTL_R = (GPIO_PORTA_PCTL_R&0xFFF0FFFF)+0x00000000;
GPIO_PORTF_DIR_R |= 0x11; // 5a) make PF4,0 output
GPIO_PORTA_DIR_R |= 0x10; // 5b) make PA4 output
GPIO_PORTF_AFSEL_R &= ~0x11; // 6a) disable alt funct on PF4,0
GPIO_PORTB_AFSEL_R |= 0x90; // 6b) enable alt funct on PB7,4
GPIO_PORTA_AFSEL_R &= ~0x10; // 6c) disable alt funct on PA4
GPIO_PORTF_DEN_R |= 0x11; // 7a) enable digital I/O on PF4,0
GPIO_PORTB_DEN_R |= 0x90; // 7b) enable digital I/O on PB7,4
GPIO_PORTA_DEN_R |= 0x10; // 7c) enable digital I/O on PA4
TFT_CS = TFT_CS_LOW;
RESET = RESET_HIGH;
BSP_Delay1ms(500);
RESET = RESET_LOW;
BSP_Delay1ms(500);
RESET = RESET_HIGH;
BSP_Delay1ms(500);
TFT_CS = TFT_CS_HIGH;
// initialize SSI2
// activate clock for SSI2
SYSCTL_RCGCSSI_R |= SYSCTL_RCGCSSI_R2;
// allow time for clock to stabilize
while((SYSCTL_PRSSI_R&SYSCTL_PRSSI_R2) == 0){};
SSI2_CR1_R &= ~SSI_CR1_SSE; // disable SSI
SSI2_CR1_R &= ~SSI_CR1_MS; // master mode
// configure for clock from source PIOSC for baud clock source
SSI2_CC_R = (SSI2_CC_R&~SSI_CC_CS_M)+SSI_CC_CS_PIOSC;
// clock divider for 4 MHz SSIClk (16 MHz PIOSC/4)
// PIOSC/(CPSDVSR*(1+SCR))
// 16/(4*(1+0)) = 4 MHz
SSI2_CPSR_R = (SSI2_CPSR_R&~SSI_CPSR_CPSDVSR_M)+4; // must be even number
SSI2_CR0_R &= ~(SSI_CR0_SCR_M | // SCR = 0 (4 Mbps data rate)
SSI_CR0_SPH | // SPH = 0
SSI_CR0_SPO); // SPO = 0
// FRF = Freescale format
SSI2_CR0_R = (SSI2_CR0_R&~SSI_CR0_FRF_M)+SSI_CR0_FRF_MOTO;
// DSS = 8-bit data
SSI2_CR0_R = (SSI2_CR0_R&~SSI_CR0_DSS_M)+SSI_CR0_DSS_8;
SSI2_CR1_R |= SSI_CR1_SSE; // enable SSI
if(cmdList) commandList(cmdList);
}
////------------ST7735_InitB------------
//// Initialization for ST7735B screens.
//// Input: none
//// Output: none
//void static ST7735_InitB(void) {
// commonInit(Bcmd);
// BSP_LCD_SetCursor(0,0);
// StTextColor = ST7735_YELLOW;
// BSP_LCD_FillScreen(0); // set screen to black
//}
//------------ST7735_InitR------------
// Initialization for ST7735R screens (green or red tabs).
// Input: option one of the enumerated options depending on tabs
// Output: none
void static ST7735_InitR(enum initRFlags option) {
commonInit(Rcmd1);
if(option == INITR_GREENTAB) {
commandList(Rcmd2green);
ColStart = 2;
RowStart = 3;
} else {
// colstart, rowstart left at default '0' values
commandList(Rcmd2red);
}
commandList(Rcmd3);
// if black, change MADCTL color filter
if (option == INITR_BLACKTAB) {
writecommand(ST7735_MADCTL);
writedata(0xC0);
}
// TabColor = option;
BSP_LCD_SetCursor(0,0);
StTextColor = ST7735_YELLOW;
BSP_LCD_FillScreen(0); // set screen to black
}
// ------------BSP_LCD_Init------------
// Initialize the SPI and GPIO, which correspond with
// BoosterPack pins J1.7 (SPI CLK), J2.13 (SPI CS), J2.15
// (SPI MOSI), J2.17 (LCD ~RST), and J4.31 (LCD DC).
// Input: none
// Output: none
void BSP_LCD_Init(void){
ST7735_InitR(INITR_GREENTAB);
}
// Set the region of the screen RAM to be modified
// Pixel colors are sent left to right, top to bottom
// (same as Font table is encoded; different from regular bitmap)
// Requires 11 bytes of transmission
void static setAddrWindow(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1) {
writecommand(ST7735_CASET); // Column addr set
writedata(0x00);
writedata(x0+ColStart); // XSTART
writedata(0x00);
writedata(x1+ColStart); // XEND
writecommand(ST7735_RASET); // Row addr set
writedata(0x00);
writedata(y0+RowStart); // YSTART
writedata(0x00);
writedata(y1+RowStart); // YEND
writecommand(ST7735_RAMWR); // write to RAM
}
// Send two bytes of data, most significant byte first
// Requires 2 bytes of transmission
void static pushColor(uint16_t color) {
writedata((uint8_t)(color >> 8));
writedata((uint8_t)color);
}
//------------BSP_LCD_DrawPixel------------
// Color the pixel at the given coordinates with the given color.
// Requires 13 bytes of transmission
// Input: x horizontal position of the pixel, columns from the left edge
// must be less than 128
// 0 is on the left, 126 is near the right
// y vertical position of the pixel, rows from the top edge
// must be less than 128
// 126 is near the wires, 0 is the side opposite the wires
// color 16-bit color, which can be produced by BSP_LCD_Color565()
// Output: none
void BSP_LCD_DrawPixel(int16_t x, int16_t y, uint16_t color) {
if((x < 0) || (x >= _width) || (y < 0) || (y >= _height)) return;
// setAddrWindow(x,y,x+1,y+1); // original code, bug???
setAddrWindow(x,y,x,y);
pushColor(color);
}
//------------BSP_LCD_DrawFastVLine------------
// Draw a vertical line at the given coordinates with the given height and color.
// A vertical line is parallel to the longer side of the rectangular display
// Requires (11 + 2*h) bytes of transmission (assuming image fully on screen)
// Input: x horizontal position of the start of the line, columns from the left edge
// y vertical position of the start of the line, rows from the top edge
// h vertical height of the line
// color 16-bit color, which can be produced by BSP_LCD_Color565()
// Output: none
void BSP_LCD_DrawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color) {
uint8_t hi = color >> 8, lo = color;
// Rudimentary clipping
if((x >= _width) || (y >= _height)) return;
if((y+h-1) >= _height) h = _height-y;
setAddrWindow(x, y, x, y+h-1);
while (h--) {
writedata(hi);
writedata(lo);
}
}
//------------BSP_LCD_DrawFastHLine------------
// Draw a horizontal line at the given coordinates with the given width and color.
// A horizontal line is parallel to the shorter side of the rectangular display
// Requires (11 + 2*w) bytes of transmission (assuming image fully on screen)
// Input: x horizontal position of the start of the line, columns from the left edge
// y vertical position of the start of the line, rows from the top edge
// w horizontal width of the line
// color 16-bit color, which can be produced by BSP_LCD_Color565()
// Output: none
void BSP_LCD_DrawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color) {
uint8_t hi = color >> 8, lo = color;
// Rudimentary clipping
if((x >= _width) || (y >= _height)) return;
if((x+w-1) >= _width) w = _width-x;
setAddrWindow(x, y, x+w-1, y);
while (w--) {
writedata(hi);
writedata(lo);
}
}
//------------BSP_LCD_FillScreen------------
// Fill the screen with the given color.
// Requires 33,293 bytes of transmission
// Input: color 16-bit color, which can be produced by BSP_LCD_Color565()
// Output: none
void BSP_LCD_FillScreen(uint16_t color) {
BSP_LCD_FillRect(0, 0, _width, _height, color); // original
// screen is actually 129 by 129 pixels, x 0 to 128, y goes from 0 to 128
}
//------------BSP_LCD_FillRect------------
// Draw a filled rectangle at the given coordinates with the given width, height, and color.
// Requires (11 + 2*w*h) bytes of transmission (assuming image fully on screen)
// Input: x horizontal position of the top left corner of the rectangle, columns from the left edge
// y vertical position of the top left corner of the rectangle, rows from the top edge
// w horizontal width of the rectangle
// h vertical height of the rectangle
// color 16-bit color, which can be produced by BSP_LCD_Color565()
// Output: none
void BSP_LCD_FillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color) {
uint8_t hi = color >> 8, lo = color;
// rudimentary clipping (drawChar w/big text requires this)
if((x >= _width) || (y >= _height)) return;
if((x + w - 1) >= _width) w = _width - x;
if((y + h - 1) >= _height) h = _height - y;
setAddrWindow(x, y, x+w-1, y+h-1);
for(y=h; y>0; y--) {
for(x=w; x>0; x--) {
writedata(hi);
writedata(lo);
}
}
}
//------------BSP_LCD_Color565------------
// Pass 8-bit (each) R,G,B and get back 16-bit packed color.
// Input: r red value
// g green value
// b blue value
// Output: 16-bit color
uint16_t BSP_LCD_Color565(uint8_t r, uint8_t g, uint8_t b) {
return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
}
//------------BSP_LCD_SwapColor------------
// Swaps the red and blue values of the given 16-bit packed color;
// green is unchanged.
// Input: x 16-bit color in format B, G, R
// Output: 16-bit color in format R, G, B
uint16_t BSP_LCD_SwapColor(uint16_t x) {
return (x << 11) | (x & 0x07E0) | (x >> 11);
}
//------------BSP_LCD_DrawBitmap------------
// Displays a 16-bit color BMP image. A bitmap file that is created
// by a PC image processing program has a header and may be padded
// with dummy columns so the data have four byte alignment. This
// function assumes that all of that has been stripped out, and the
// array image[] has one 16-bit halfword for each pixel to be
// displayed on the screen (encoded in reverse order, which is
// standard for bitmap files). An array can be created in this
// format from a 24-bit-per-pixel .bmp file using the associated
// converter program.
// (x,y) is the screen location of the lower left corner of BMP image
// Requires (11 + 2*w*h) bytes of transmission (assuming image fully on screen)
// Input: x horizontal position of the bottom left corner of the image, columns from the left edge
// y vertical position of the bottom left corner of the image, rows from the top edge
// image pointer to a 16-bit color BMP image
// w number of pixels wide
// h number of pixels tall
// Output: none
// Must be less than or equal to 128 pixels wide by 128 pixels high
void BSP_LCD_DrawBitmap(int16_t x, int16_t y, const uint16_t *image, int16_t w, int16_t h){
int16_t skipC = 0; // non-zero if columns need to be skipped due to clipping
int16_t originalWidth = w; // save this value; even if not all columns fit on the screen, the image is still this width in ROM
int i = w*(h - 1);
if((x >= _width) || ((y - h + 1) >= _height) || ((x + w) <= 0) || (y < 0)){
return; // image is totally off the screen, do nothing
}
if((w > _width) || (h > _height)){ // image is too wide for the screen, do nothing
//***This isn't necessarily a fatal error, but it makes the
//following logic much more complicated, since you can have
//an image that exceeds multiple boundaries and needs to be
//clipped on more than one side.
return;
}
if((x + w - 1) >= _width){ // image exceeds right of screen
skipC = (x + w) - _width; // skip cut off columns
w = _width - x;
}
if((y - h + 1) < 0){ // image exceeds top of screen
i = i - (h - y - 1)*originalWidth; // skip the last cut off rows
h = y + 1;
}
if(x < 0){ // image exceeds left of screen
w = w + x;
skipC = -1*x; // skip cut off columns
i = i - x; // skip the first cut off columns
x = 0;
}
if(y >= _height){ // image exceeds bottom of screen
h = h - (y - _height + 1);
y = _height - 1;
}
setAddrWindow(x, y-h+1, x+w-1, y);
for(y=0; y<h; y=y+1){
for(x=0; x<w; x=x+1){
// send the top 8 bits
writedata((uint8_t)(image[i] >> 8));
// send the bottom 8 bits
writedata((uint8_t)image[i]);
i = i + 1; // go to the next pixel
}
i = i + skipC;
i = i - 2*originalWidth;
}
}
//------------BSP_LCD_DrawCharS------------
// Simple character draw function. This is the same function from
// Adafruit_GFX.c but adapted for this processor. However, each call
// to BSP_LCD_DrawPixel() calls setAddrWindow(), which needs to send
// many extra data and commands. If the background color is the same
// as the text color, no background will be printed, and text can be
// drawn right over existing images without covering them with a box.
// Requires (11 + 2*size*size)*6*8 bytes of transmission (image fully on screen; textcolor != bgColor)
// Input: x horizontal position of the top left corner of the character, columns from the left edge
// y vertical position of the top left corner of the character, rows from the top edge
// c character to be printed
// textColor 16-bit color of the character
// bgColor 16-bit color of the background
// size number of pixels per character pixel (e.g. size==2 prints each pixel of font as 2x2 square)
// Output: none
void BSP_LCD_DrawCharS(int16_t x, int16_t y, char c, int16_t textColor, int16_t bgColor, uint8_t size){
uint8_t line; // vertical column of pixels of character in font
int32_t i, j;
if((x >= _width) || // Clip right
(y >= _height) || // Clip bottom