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spi_lcd.c
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spi_lcd.c
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// LCD direct communication using the SPI interface
// Copyright (c) 2017 Larry Bank
// email: bitbank@pobox.com
// Project started 5/15/2017
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// The ILITEK LCD display controllers communicate through the SPI interface
// and two GPIO pins to control the RESET, and D/C (data/command)
// control lines.
// Use one of the following 4 methods for talking to the SPI/GPIO
#define USE_PIGPIO
//#define USE_BCM2835
//#define USE_WIRINGPI
//#define USE_GENERIC
// For generic SPI access (kernel drivers), select the board pinout (only one)
//#define USE_NANOPI2
//#define USE_NANOPIK2
//#define USE_NANOPIDUO
//#define USE_NANOPINEO
//define USE_NANOPIM1
//#define USE_RPI
//#define USE_ORANGEPIZERO
//#define USE_ORANGEPIONE
//#define USE_BANANAPIM2ZERO
//#define USE_BANANAPIM2MAGIC
//#define USE_NANOPINEOCORE
//#define USE_ORANGEPIZEROPLUS2
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#ifdef USE_WIRINGPI
#include <wiringPi.h>
#include <wiringPiSPI.h>
#endif // USE_WIRINGPI
#include <linux/types.h>
//#include <linux/spi/spidev.h>
#ifdef USE_BCM2835
#include <bcm2835.h>
#endif
#include "spi_lcd.h"
#ifdef USE_PIGPIO
#include <pigpio.h>
#endif // USE_PIGPIO
#ifdef __NEON__
#include <arm_neon.h>
#endif //__NEON__
#ifdef USE_GENERIC
#include <linux/spi/spidev.h>
static struct spi_ioc_transfer xfer;
#define GPIO_OUT 0
#define GPIO_IN 1
static int iPinHandles[256]; // keep file handles open for GPIO access
#endif // USE_GENERIC
extern unsigned char ucFont[];
static unsigned char ucRXBuf[4096]; //, ucRXBuf2[4096];
static int file_spi = -1; // SPI system handle
static int file_touch = -1; // SPI handle for touch controller
static int iTouchChannel, iTouchType;
static int iDCPin, iResetPin, iLEDPin; // pin numbers for the GPIO control lines
static int iMinX, iMaxX, iMinY, iMaxY; // touch calibration values
static int iScrollOffset; // current scroll amount
static int iOrientation = LCD_ORIENTATION_NATIVE; // default to 'natural' orientation
static int iLCDType;
static int iWidth, iHeight;
static int iCurrentWidth, iCurrentHeight; // reflects virtual size due to orientation
static void spilcdWriteCommand(unsigned char);
static void spilcdWriteData8(unsigned char c);
static void spilcdWriteData16(unsigned short us);
static void spilcdSetPosition(int x, int y, int w, int h);
static void spilcdWriteDataBlock(unsigned char *pData, int iLen);
static void myPinWrite(int iPin, int iValue);
int spilcdFill(unsigned short usData);
// For Raspberry Pi boards, we can use the generic GPIO/SPI access too
#ifdef USE_RPI
static int iGenericPins[] = {-1,-1,-1,2,-1,3,-1,4,14,-1,
15,17,18,27,-1,22,23,-1,24,10,
-1,9,25,11,8,-1,7,0,1,5,
-1,6,12,13,-1,19,16,26,20,-1,
21};
#endif // USE_RPI
#ifdef USE_NANOPINEOCORE
static int iGenericPins[] = {-1,-1,-1,12,-1,11,-1,203,198,-1,
199,0,6,2,-1,3,200,-1,201,64,
-1,65,1,66,67,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,167,-1,
140,-1,141,-1,-1,-1,15,-1,16,-1,
14,-1,13,-1,-1,363,-1,17,-1,18,
-1,19,164,20,162,21,-1,-1,-1};
#endif // USE_NANOPINEOCORE
#ifdef USE_ORANGEPIZEROPLUS2
static int iGenericPins[] = {-1,-1,-1,12,-1,11,-1,6,0,-1,1,352,107,353,-1,3,
19,-1,18,-1,-1,-1,2,14,13,-1,110,-1,5,4,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1};
#endif // USE_ORANGEPIZEROPLUS2
#ifdef USE_BANANAPIM2ZERO
static int iGenericPins[] = {-1,-1,-1,12,-1,11,-1,6,13,-1,14,1,110,0,-1,3,15,-1,68,64,-1,65,2,66,67,-1,71,19,18,7,-1,8,354,9,-1,10,356,17,21,-1,20};
#endif // BPI-M2-Zero
#ifdef USE_BANANAPIM2MAGIC
static int iGenericPins[] = {-1,-1,-1,-1,-1,-1,-1,225,32,-1,33,230,203,231,-1,117,34,-1,35,64,-1,65,116,66,67,-1,121,115,120,114,-1,119,118,123,-1,202,122,363,205,-114,204};
#endif // BPI-M2-Magic
#ifdef USE_ORANGEPIONE
static int iGenericPins[] = {-1,-1,-1,12,-1,11,-1,6,13,-1,14,1,110,0,-1,3,68,-1,71,64,-1,65,2,66,67,-1,21,19,18,7,-1,8,200,9,-1,10,201,20,198,-1,199};
#endif // ORANGEPIONE
#ifdef USE_ORANGEPIZERO
static int iGenericPins[] = {-1,-1,-1,12,-1,11,-1,6,198,-1,199,1,7,0,-1,3,19,-1,18,15,-1,16,2,14,13,-1,10,-1,5,4,-1,
-1,-1,-1,-1,-1,-1,-1,-1};
#endif // ORANGEPIZERO
#ifdef USE_NANOPIDUO
static int iGenericPins[] = {-1,5,-1,4,-1,-1,-1,11,
-1,12,363,13,203,14,-1,16,
-1,15,-1,199,-1,198,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,
-1,355,-1,-1,-1,-1,-1,-1,-1};
#endif // USE_NANOPIDUO
#ifdef USE_NANOPI2
static int iGenericPins[] = {-1,-1,-1,99,-1,98,-1,32+28,96+21,-1,96+17,
32+29,32+26,32+30,-1,32+31,64+14,-1,32+27,64+31,-1,96+0,96+1,64+29,64+30,-1,64+13,103,102,
64+8,-1,64+9,64+28,64+10,-1,64+12,64+7,64+11,162,-1,163};
#endif // USE_NANOPI2
#ifdef USE_NANOPIM1
static int iGenericPins[] = {-1,-1,-1,12,-1,11,-1,203,198,-1,199,0,6,2,-1,3,200,-1,201,64,-1,65,1,66,67,-1,17,19,18,20,-1,21,7,8,-1,16,13,9,15,-1,14};
#endif // USE_NANOPIM1
#ifdef USE_NANOPIK2
static int iGenericPins[] = {-1,-1,-1,205,-1,206,-1,211,102,-1,225,212,227,213,-1,214,226,-1,215,216,-1,218,217,220,219,-1,221,207,208,222,-1,127,223,155,-1,252,-1,-1,-1,-1,-1};
#endif // USE_NANOPIK2
#ifdef USE_NANOPINEO
// NanoPi NEO
// define 40 pins since the 12 pin header has 2 GPIOs available and so does
// the 4-pin TTY header
static int iGenericPins[] = {-1,-1,-1,12,-1,11,-1,203,198,-1,
199,0,6,2,-1,3,200,-1,201,64,
-1,65,1,66,67,-1,-1,-1,-1,-1,
363,17,-1,-1,-1,-1,-1,-1,-1,4,
5};
#endif // USE_NANOPINEO
#ifdef USE_PIGPIO
static int iPIGPins[] = {-1,-1,-1,2,-1,3,-1,4,14,-1,15,
17,18,27,-1,22,23,-1,24,10,-1,9,25,11,8,-1,7,0,1,
5,-1,6,12,13,-1,19,16,26,20,-1,21};
#endif // USE_PIGPIO
#ifdef USE_WIRINGPI
static int iWPPins[] = {-1,-1,-1,8,-1,9,-1,7,15,-1,16,0,1,
2,-1,3,4,-1,5,12,-1,13,6,14,10,-1,11,30,31,21,-1,22,26,23,-1,24,27,25,28,-1,29};
#endif // USE_WIRINGPI
#ifdef USE_BCM2835
static int iBCM2835Pins[] = {-1,-1,-1,RPI_V2_GPIO_P1_03,-1,RPI_V2_GPIO_P1_05,-1,
RPI_V2_GPIO_P1_07, RPI_V2_GPIO_P1_08,-1, RPI_V2_GPIO_P1_10, RPI_V2_GPIO_P1_11,
RPI_V2_GPIO_P1_12, RPI_V2_GPIO_P1_13, -1, RPI_V2_GPIO_P1_15,RPI_V2_GPIO_P1_16,
-1, RPI_V2_GPIO_P1_18, RPI_V2_GPIO_P1_19, -1, RPI_V2_GPIO_P1_21, RPI_V2_GPIO_P1_22,
RPI_V2_GPIO_P1_23, RPI_V2_GPIO_P1_24, -1, RPI_V2_GPIO_P1_26, -1, -1,
RPI_V2_GPIO_P1_29, -1, RPI_V2_GPIO_P1_31, RPI_V2_GPIO_P1_32, RPI_V2_GPIO_P1_33,
-1, RPI_V2_GPIO_P1_35, RPI_V2_GPIO_P1_36, RPI_V2_GPIO_P1_37, RPI_V2_GPIO_P1_38,
-1, RPI_V2_GPIO_P1_40};
#endif // BCM2835
// Sets the D/C pin to data or command mode
void spilcdSetMode(int iMode)
{
myPinWrite(iDCPin, iMode == MODE_DATA);
} /* spilcdSetMode() */
// List of command/parameters to initialize the SSD1351 OLED display
static unsigned char ucOLEDInitList[] = {
2, 0xfd, 0x12, // unlock the controller
2, 0xfd, 0xb1, // unlock the command
1, 0xae, // display off
2, 0xb3, 0xf1, // clock divider
2, 0xca, 0x7f, // mux ratio
2, 0xa0, 0x74, // set remap
3, 0x15, 0x00, 0x7f, // set column
3, 0x75, 0x00, 0x7f, // set row
2, 0xb5, 0x00, // set GPIO state
2, 0xab, 0x01, // function select (internal diode drop)
2, 0xb1, 0x32, // precharge
2, 0xbe, 0x05, // vcomh
1, 0xa6, // set normal display mode
4, 0xc1, 0xc8, 0x80, 0xc8, // contrast ABC
2, 0xc7, 0x0f, // contrast master
4, 0xb4, 0xa0,0xb5,0x55, // set VSL
2, 0xb6, 0x01, // precharge 2
1, 0xaf, // display ON
0};
// List of command/parameters to initialize the ili9341 display
static unsigned char uc240InitList[] = {
4, 0xEF, 0x03, 0x80, 0x02,
4, 0xCF, 0x00, 0XC1, 0X30,
5, 0xED, 0x64, 0x03, 0X12, 0X81,
4, 0xE8, 0x85, 0x00, 0x78,
6, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02,
2, 0xF7, 0x20,
3, 0xEA, 0x00, 0x00,
2, 0xc0, 0x23, // Power control
2, 0xc1, 0x10, // Power control
3, 0xc5, 0x3e, 0x28, // VCM control
2, 0xc7, 0x86, // VCM control2
2, 0x36, 0x48, // Memory Access Control
2, 0x3a, 0x55,
3, 0xb1, 0x00, 0x18,
4, 0xb6, 0x08, 0x82, 0x27, // Display Function Control
2, 0xF2, 0x00, // Gamma Function Disable
2, 0x26, 0x01, // Gamma curve selected
16, 0xe0, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08,
0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00, // Set Gamma
16, 0xe1, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07,
0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F, // Set Gamma
3, 0xb1, 0x00, 0x10, // FrameRate Control 119Hz
0
};
// List of command/parameters to initialize the ili9342 display
static unsigned char uc320InitList[] = {
2, 0xc0, 0x23, // Power control
2, 0xc1, 0x10, // Power control
3, 0xc5, 0x3e, 0x28, // VCM control
2, 0xc7, 0x86, // VCM control2
2, 0x36, 0x08, // Memory Access Control (flip x/y/bgr/rgb)
2, 0x3a, 0x55,
1, 0x21, // inverted display off
// 2, 0x26, 0x01, // Gamma curve selected
// 16, 0xe0, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08,
// 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00, // Set Gamma
// 16, 0xe1, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07,
// 0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F, // Set Gamma
// 3, 0xb1, 0x00, 0x10, // FrameRate Control 119Hz
0
};
// List of command/parameters to initialize the ST7789 LCD
static unsigned char uc240x240InitList[] = {
1, 0x13, // partial mode off
1, 0x21, // display inversion off
2, 0x36,0x08, // memory access 0xc0 for 180 degree flipped
2, 0x3a,0x55, // pixel format; 5=RGB565
3, 0x37,0x00,0x00, //
6, 0xb2,0x0c,0x0c,0x00,0x33,0x33, // Porch control
2, 0xb7,0x35, // gate control
2, 0xbb,0x1a, // VCOM
2, 0xc0,0x2c, // LCM
2, 0xc2,0x01, // VDV & VRH command enable
2, 0xc3,0x0b, // VRH set
2, 0xc4,0x20, // VDV set
2, 0xc6,0x0f, // FR control 2
3, 0xd0, 0xa4, 0xa1, // Power control 1
15, 0xe0, 0x00,0x19,0x1e,0x0a,0x09,0x15,0x3d,0x44,0x51,0x12,0x03,
0x00,0x3f,0x3f, // gamma 1
15, 0xe1, 0x00,0x18,0x1e,0x0a,0x09,0x25,0x3f,0x43,0x52,0x33,0x03,
0x00,0x3f,0x3f, // gamma 2
1, 0x29, // display on
0
};
// List of command/parameters to initialize the st7735 display
static unsigned char uc128InitList[] = {
// 4, 0xb1, 0x01, 0x2c, 0x2d, // frame rate control
// 4, 0xb2, 0x01, 0x2c, 0x2d, // frame rate control (idle mode)
// 7, 0xb3, 0x01, 0x2c, 0x2d, 0x01, 0x2c, 0x2d, // frctrl - partial mode
// 2, 0xb4, 0x07, // non-inverted
// 4, 0xc0, 0x82, 0x02, 0x84, // power control
// 2, 0xc1, 0xc5, // pwr ctrl2
// 2, 0xc2, 0x0a, 0x00, // pwr ctrl3
// 3, 0xc3, 0x8a, 0x2a, // pwr ctrl4
// 3, 0xc4, 0x8a, 0xee, // pwr ctrl5
// 2, 0xc5, 0x0e, // pwr ctrl
// 1, 0x20, // display inversion off
2, 0x3a, 0x55, // pixel format RGB565
2, 0x36, 0xc0, // MADCTL
17, 0xe0, 0x09, 0x16, 0x09,0x20,
0x21,0x1b,0x13,0x19,
0x17,0x15,0x1e,0x2b,
0x04,0x05,0x02,0x0e, // gamma sequence
17, 0xe1, 0x0b,0x14,0x08,0x1e,
0x22,0x1d,0x18,0x1e,
0x1b,0x1a,0x24,0x2b,
0x06,0x06,0x02,0x0f,
0
};
// List of command/parameters to initialize the hx8357 display
static unsigned char uc480InitList[] = {
2, 0x3a, 0x55,
2, 0xc2, 0x44,
5, 0xc5, 0x00, 0x00, 0x00, 0x00,
16, 0xe0, 0x0f, 0x1f, 0x1c, 0x0c, 0x0f, 0x08, 0x48, 0x98, 0x37,
0x0a,0x13, 0x04, 0x11, 0x0d, 0x00,
16, 0xe1, 0x0f, 0x32, 0x2e, 0x0b, 0x0d, 0x05, 0x47, 0x75, 0x37,
0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
16, 0xe2, 0x0f, 0x32, 0x2e, 0x0b, 0x0d, 0x05, 0x47, 0x75, 0x37,
0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
2, 0x36, 0x48,
0
};
//
// Wrapper function for simultaneous read/write to SPI bus
//
static int myspiReadWrite(unsigned char *pTxBuf, unsigned char *pRxBuf, int iLen)
{
int i = 0;
#ifdef USE_PIGPIO
i = spiXfer(file_touch, (char *)pTxBuf, (char *)pRxBuf, iLen);
#endif
#ifdef USE_WIRINGPI
memcpy(pRxBuf, pTxBuf, iLen);
// i = wiringPiSPIDataRW(iTouchChannel, pRxBuf);
#endif
return i;
} /* myspiReadWrite() */
//
// Wrapper function for writing to SPI
//
static void myspiWrite(unsigned char *pBuf, int iLen)
{
#ifdef USE_GENERIC
xfer.tx_buf = (unsigned long)pBuf;
xfer.len = iLen;
ioctl(file_spi, SPI_IOC_MESSAGE(1), &xfer);
#endif // USE_GENERIC
#ifdef USE_PIGPIO
spiWrite(file_spi, (char *)pBuf, iLen);
#endif
#ifdef USE_BCM2835
bcm2835_spi_writenb((char *)pBuf, iLen);
#endif
#ifdef USE_WIRINGPI
write(file_spi, (char *)pBuf, iLen);
#endif
} /* myspiWrite() */
//
// Wrapper function to control a GPIO line
//
static void myPinWrite(int iPin, int iValue)
{
#ifdef USE_GENERIC
int rc;
char szTemp[64];
if (iPinHandles[iPin] == -1) // not open yet
{
sprintf(szTemp, "/sys/class/gpio/gpio%d/value", iPin);
iPinHandles[iPin] = open(szTemp, O_WRONLY);
}
if (iValue) rc = write(iPinHandles[iPin], "1", 1);
else rc = write(iPinHandles[iPin], "0", 1);
if (rc < 0) // error
{ // do something
}
#endif // USE_GENERIC
#ifdef USE_BCM2835
if (iValue)
bcm2835_gpio_set(iPin);
else
bcm2835_gpio_clr(iPin);
#endif
#ifdef USE_PIGPIO
gpioWrite(iPin, iValue);
#endif
#ifdef USE_WIRINGPI
digitalWrite(iPin, (iValue) ? HIGH: LOW);
#endif
} /* myPinWrite() */
//
// Read the current touch values
//
// returns -1 for error, 0 for no touch info, 1 for touch info
//
int spilcdReadTouchPos(int *pX, int *pY)
{
// commands and SPI transaction filler to read 3 byte response for x/y
unsigned char ucReadX[] = {0xd0,0x00,0x00};
unsigned char ucReadY[] = {0x90,0x00,0x00};
unsigned char ucRxBuf[6];
int x, y;
if (pX == NULL || pY == NULL)
return -1;
ucRxBuf[0] = ucRxBuf[1] = ucRxBuf[2] = ucRxBuf[3] = ucRxBuf[4] = ucRxBuf[5] = 0; // suppress compiler warning
myspiReadWrite(ucReadX, ucRxBuf, 3);
myspiReadWrite(ucReadY, &ucRxBuf[3], 3);
x = ((ucRxBuf[2] + (ucRxBuf[1]<<8)) >> 4); // top 12 bits
y = ((ucRxBuf[5] + (ucRxBuf[4]<<8)) >> 4);
if (x > iMaxX) x = iMaxX;
x -= iMinX;
if (x < 0) x = 0;
if (y > iMaxY) y = iMaxY;
y -= iMinY;
if (y < 0) y = 0;
// normalize values to be in 0-1023 range
x = (x << 10)/(iMaxX - iMinX);
y = (y << 10)/(iMaxY - iMinY);
// flip coordinate system
x = 1023-x;
y = 1023-y;
if (x < 0) x = 0;
if (y < 0) y = 0;
*pX = x;
*pY = y;
return (ucRxBuf[1] != 0 || ucRxBuf[2] != 0);
} /* spilcdreadTouchPos() */
void spilcdShutdownTouch(void)
{
#ifdef USE_PIGPIO
spiClose(file_touch);
gpioTerminate();
#endif
#ifdef USE_WIRINGPI
close(file_touch);
#endif // USE_WIRINGPI
file_touch = -1;
} /* spilcdShutdownTouch() */
//
// Set calibration values for touch input
//
void spilcdTouchCalibration(int iminx, int imaxx, int iminy, int imaxy)
{
iMinX = iminx;
iMaxX = imaxx;
iMinY = iminy;
iMaxY = imaxy;
} /* spilcdTouchCalibration() */
//
// Initialize the touch controller
//
int spilcdInitTouch(int iType, int iChannel, int iSPIFreq)
{
unsigned char ucInitString[] = {0x80,0x00,0x00};
unsigned char ucRxBuf[4];
if (iType != TOUCH_XPT2046)
return -1;
iTouchChannel = iChannel;
iTouchType = iType;
#ifdef USE_PIGPIO
if (gpioInitialise() < 0)
{
printf("pigpio failed to initialize\n");
return -1;
}
file_touch = spiOpen(iChannel, iSPIFreq, 0);
#endif
#ifdef USE_WIRINGPI
wiringPiSetup();
file_touch = wiringPiSPISetup(iChannel, iSPIFreq);
#endif
myspiReadWrite(ucInitString, ucRxBuf, 4);
return 0;
} /* spilcdInitTouch() */
#ifdef USE_GENERIC
void GenericAddGPIO(int iPin, int iDirection, int bPullup)
{
char szName[64];
int file_gpio, rc;
file_gpio = open("/sys/class/gpio/export", O_WRONLY);
sprintf(szName, "%d", iPin);
rc = write(file_gpio, szName, strlen(szName));
close(file_gpio);
sprintf(szName, "/sys/class/gpio/gpio%d/direction", iPin);
file_gpio = open(szName, O_WRONLY);
if (iDirection == GPIO_OUT)
rc = write(file_gpio, "out", 3);
else
{
if (bPullup) // set output value to 1
{
int temp;
rc = write(file_gpio, "out",3);
sprintf(szName, "/sys/class/gpio/gpio%d/value", iPin);
temp = open(szName, O_WRONLY);
rc = write(temp, "1",1);
close(temp);
}
rc = write(file_gpio, "in", 2);
}
close(file_gpio);
iPinHandles[iPin] = -1;
if (rc < 0) // added to suppress compiler warnings
{ // do nothing
}
} /* GenericAddGPIO() */
void GenericRemoveGPIO(int iPin)
{
int file_gpio, rc;
char szTemp[64];
close(iPinHandles[iPin]);
file_gpio = open("/sys/class/gpio/unexport", O_WRONLY);
sprintf(szTemp, "%d", iPin);
rc = write(file_gpio, szTemp, strlen(szTemp));
close(file_gpio);
if (rc < 0) // suppress compiler warning
{ // do nothing
}
} /* GenericRemoveGPIO() */
#endif // USE_GENERIC
//
// Choose the gamma curve between 2 choices (0/1)
// ILI9341 only
//
int spilcdSetGamma(int iMode)
{
int i;
unsigned char *sE0, *sE1;
static unsigned char ucE0_0[] = {0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00};
static unsigned char ucE1_0[] = {0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F};
static unsigned char ucE0_1[] = {0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87, 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00};
static unsigned char ucE1_1[] = {0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78, 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f};
if (iMode < 0 || iMode > 1 || iLCDType != LCD_ILI9341)
return 1;
if (iMode == 0)
{
sE0 = ucE0_0;
sE1 = ucE1_0;
}
else
{
sE0 = ucE0_1;
sE1 = ucE1_1;
}
spilcdWriteCommand(0xe0);
for(i=0; i<16; i++)
{
spilcdWriteData8(*sE0++);
}
spilcdWriteCommand(0xe1);
for(i=0; i<16; i++)
{
spilcdWriteData8(*sE1++);
}
return 0;
} /* spilcdSetGamme() */
//
// Initialize the LCD controller and clear the display
// LED pin is optional - pass as -1 to disable
//
int spilcdInit(int iType, int bFlipped, int iChannel, int iSPIFreq, int iDC, int iReset, int iLED)
{
unsigned char *s;
int i, iCount;
iLEDPin = -1; // assume it's not defined
if (iType != LCD_ILI9341 && iType != LCD_ST7735 && iType != LCD_HX8357 && iType != LCD_SSD1351 && iType != LCD_ILI9342 && iType != LCD_ST7789)
{
printf("Unsupported display type\n");
return -1;
}
iLCDType = iType;
iScrollOffset = 0; // current hardware scroll register value
#ifdef USE_BCM2835
iDCPin = iBCM2835Pins[iDC]; // use the pin numbers as-is
iResetPin = iBCM2835Pins[iReset];
if (iLED != -1)
iLEDPin = iBCM2835Pins[iLED];
if (iDCPin == -1 || iResetPin == -1)
{
printf("One or more invalid GPIO Pin numbers\n");
return -1;
}
if (!bcm2835_init())
{
printf("failed to initialize BCM2835 library\n");
return -1;
}
bcm2835_spi_begin();
bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST); // The default
bcm2835_spi_setDataMode(BCM2835_SPI_MODE0); // The default
if (iSPIFreq >= 32000000)
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_4); // 32Mhz
else if (iSPIFreq >= 16000000)
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_8); // 16Mhz
else
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_16); // 8Mhz
bcm2835_spi_chipSelect(BCM2835_SPI_CS0); // The default
bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW); // the default
file_spi = 0;
#endif // USE_BCM2835
#ifdef USE_PIGPIO
iDCPin = iPIGPins[iDC];
iResetPin = iPIGPins[iReset];
if (iLED != -1)
iLEDPin = iPIGPins[iLED];
if (iDCPin == -1 || iResetPin == -1)
{
printf("One or more invalid GPIO pin numbers\n");
return -1;
}
if (gpioInitialise() < 0)
printf("pigpio failed to initialize\n");
file_spi = spiOpen(iChannel, iSPIFreq, 0);
#endif // USE_PIGPIO
#ifdef USE_GENERIC
iDCPin = iGenericPins[iDC];
iResetPin = iGenericPins[iReset];
if (iLED != -1)
iLEDPin = iGenericPins[iLED];
if (iDCPin == -1 || iResetPin == -1)
{
printf("One or more invalid GPIO pin numbers\n");
return -1;
}
{
char szName[32];
int rc, iSPIMode = SPI_MODE_0; // | SPI_NO_CS;
int i = iSPIFreq;
sprintf(szName,"/dev/spidev%d.0", iChannel);
file_spi = open(szName, O_RDWR);
rc = ioctl(file_spi, SPI_IOC_WR_MODE, &iSPIMode);
if (rc < 0) printf("Error setting SPI mode\n");
rc = ioctl(file_spi, SPI_IOC_WR_MAX_SPEED_HZ, &i);
if (rc < 0) printf("Error setting SPI speed\n");
memset(&xfer, 0, sizeof(xfer));
xfer.speed_hz = iSPIFreq;
xfer.cs_change = 0;
xfer.delay_usecs = 0;
xfer.bits_per_word = 8;
// xfer.rx_buf = (unsigned long)ucRXBuf2; // dummy receive buffer
}
#endif // USE_GENERIC
#ifdef USE_WIRINGPI
iDCPin = iWPPins[iDC];
iResetPin = iWPPins[iReset];
if (iLED != -1)
iLEDPin = iWPPins[iLED];
if (iDCPin == -1 || iResetPin == -1)
{
printf("One or more invalid GPIO pin numbers\n");
return -1;
}
wiringPiSetup(); // initialize GPIO interface
file_spi = wiringPiSPISetup(iChannel, iSPIFreq); // Initialize SPI channel
#endif
if (file_spi < 0)
{
fprintf(stderr, "Failed to open the SPI bus\n");
return -1;
}
#ifdef USE_GENERIC
GenericAddGPIO(iDCPin, GPIO_OUT, 0);
GenericAddGPIO(iResetPin, GPIO_OUT, 0);
if (iLEDPin != -1)
GenericAddGPIO(iLEDPin, GPIO_OUT, 0);
#endif // USE_GENERIC
#ifdef USE_BCM2835
bcm2835_gpio_fsel(iDCPin, BCM2835_GPIO_FSEL_OUTP);
bcm2835_gpio_fsel(iResetPin, BCM2835_GPIO_FSEL_OUTP);
if (iLEDPin != -1)
bcm2835_gpio_fsel(iLEDPin, BCM2835_GPIO_FSEL_OUTP);
#endif
#ifdef USE_PIGPIO
gpioSetMode(iDCPin, PI_OUTPUT);
gpioSetMode(iResetPin, PI_OUTPUT);
if (iLEDPin != -1)
gpioSetMode(iLEDPin, PI_OUTPUT);
#endif
#ifdef USE_WIRINGPI
pinMode(iDCPin, OUTPUT);
pinMode(iResetPin, OUTPUT);
if (iLEDPin != -1)
pinMode(iLEDPin, OUTPUT);
#endif
myPinWrite(iResetPin, 1);
usleep(100000);
myPinWrite(iResetPin, 0); // reset the controller
usleep(100000);
myPinWrite(iResetPin, 1);
usleep(200000);
if (iLCDType != LCD_SSD1351) // no backlight and no soft reset on OLED
{
if (iLEDPin != -1)
myPinWrite(iLEDPin, 1); // turn on the backlight
spilcdWriteCommand(0x01); // software reset
usleep(120000);
spilcdWriteCommand(0x11);
usleep(250000);
}
if (iLCDType == LCD_ST7789)
{
s = uc240x240InitList;
if (bFlipped)
s[6] = 0xc0; // flip 180
else
s[6] = 0x00;
iCurrentWidth = iWidth = 240;
iCurrentHeight = iHeight = 240;
} // ST7789
else if (iLCDType == LCD_SSD1351)
{
s = ucOLEDInitList; // do the commands manually
iCurrentWidth = iWidth = 128;
iCurrentHeight = iHeight = 128;
}
// Send the commands/parameters to initialize the LCD controller
else if (iLCDType == LCD_ILI9341)
{
s = uc240InitList;
if (bFlipped)
s[50] = 0x88; // flip 180
else
s[50] = 0x48; // normal orientation
iCurrentWidth = iWidth = 240;
iCurrentHeight = iHeight = 320;
}
else if (iLCDType == LCD_ILI9342)
{
s = uc320InitList;
if (bFlipped)
s[15] = 0xc8; // flip 180
else
s[15] = 0x08; // normal orientation
iCurrentWidth = iWidth = 320;
iCurrentHeight = iHeight = 240;
}
else if (iLCDType == LCD_HX8357)
{
spilcdWriteCommand(0xb0);
spilcdWriteData16(0x00FF);
spilcdWriteData16(0x0001);
usleep(100000);
s = uc480InitList;
if (bFlipped)
s[65] = 0x88; // flip 180
else
s[65] = 0x48; // normal orientation
iCurrentWidth = iWidth = 320;
iCurrentHeight = iHeight = 480;
}
else // ST7735
{
s = uc128InitList;
if (bFlipped)
s[5] = 0x00; // flipped 180 degrees
else
s[5] = 0xc0; // normal orientation
iCurrentWidth = iWidth = 128;
iCurrentHeight = iHeight = 160;
}
iCount = 1;
while (iCount)
{
iCount = *s++;
if (iCount != 0)
{
spilcdWriteCommand(*s++);
for(i=0; i<iCount-1; i++)
{
spilcdWriteData8(*s++);
}
}
}
if (iLCDType != LCD_SSD1351)
{
spilcdWriteCommand(0x11); // sleep out
usleep(120000);
spilcdWriteCommand(0x29); // Display ON
usleep(10000);
}
spilcdFill(0); // erase memory
spilcdScrollReset();
return 0;
} /* spilcdInit() */
// Configure a GPIO pin for input
// Returns 0 if successful, -1 if unavailable
// all input pins are assumed to use internal pullup resistors
// and are connected to ground when pressed
//
int spilcdConfigurePin(int iPin)
{
int iGPIO;
#ifdef USE_GENERIC
iGPIO = iGenericPins[iPin];
if (iGPIO == -1) // invalid pin number
return -1;
GenericAddGPIO(iGPIO, GPIO_IN, 1);
#endif // USE_GENERIC
#ifdef USE_BCM2835
iGPIO = iBCM2835Pins[iPin];
if (iGPIO == 0) // invalid pin number
return -1;
bcm2835_gpio_fsel(iGPIO, BCM2835_GPIO_FSEL_INPT);
bcm2835_gpio_set_pud(iGPIO, BCM2835_GPIO_PUD_UP);
#endif
#ifdef USE_PIGPIO
iGPIO = iPIGPins[iPin];
if (iGPIO == -1) // invalid pin
return -1;
gpioSetMode(iGPIO, PI_INPUT);
gpioSetPullUpDown(iGPIO, PI_PUD_UP);
#endif
#ifdef USE_WIRINGPI
iGPIO = iWPPins[iPin];
if (iGPIO == -1) // invalid
return -1;
pinMode(iGPIO, INPUT);
pullUpDnControl(iGPIO, PUD_UP);
#endif
return 0;
} /* spilcdConfigurePin() */
// Read from a GPIO pin
int spilcdReadPin(int iPin)
{
int iGPIO;
#ifdef USE_GENERIC
{
char szTemp[64];
int rc;
iGPIO = iGenericPins[iPin];
if (iGPIO == -1) // invalid pin, return idle button
return 1;
if (iPinHandles[iGPIO] == -1)
{
sprintf(szTemp, "/sys/class/gpio/gpio%d/value", iGPIO);
iPinHandles[iGPIO] = open(szTemp, O_RDONLY);
}
lseek(iPinHandles[iGPIO], 0, SEEK_SET);
rc = read(iPinHandles[iGPIO], szTemp, 1);
if (rc < 0) // do nothing
{}
return (szTemp[0] == '1');
}
#endif // USE_GENERIC
#ifdef USE_PIGPIO
iGPIO = iPIGPins[iPin];
return gpioRead(iGPIO);
#endif // USE_PIGPIO
#ifdef USE_WIRINGPI
iGPIO = iWPPins[iPin];
return (digitalRead(iGPIO) == HIGH);
#endif // USE_WIRINGPI
#ifdef USE_BCM2835
iGPIO = iBCM2835Pins[iPin];
return (bcm2835_gpio_lev(iGPIO) == HIGH);
#endif // USE_BCM2835
} /* spilcdReadPin() */
//
// Reset the scroll position to 0
//
void spilcdScrollReset(void)
{
iScrollOffset = 0;
if (iLCDType == LCD_SSD1351)
{
spilcdWriteCommand(0xa1); // set scroll start line
spilcdWriteData8(0x00);
spilcdWriteCommand(0xa2); // display offset
spilcdWriteData8(0x00);
return;
}
spilcdWriteCommand(0x37); // scroll start address
spilcdWriteData16(0);
if (iLCDType == LCD_HX8357)
{
spilcdWriteData16(0);
}
} /* spilcdScrollReset() */
//
// Scroll the screen N lines vertically (positive or negative)
// The value given represents a delta which affects the current scroll offset
// If iFillColor != -1, the newly exposed lines will be filled with that color
//
void spilcdScroll(int iLines, int iFillColor)
{
iScrollOffset = (iScrollOffset + iLines) % iHeight;
if (iLCDType == LCD_SSD1351)
{
spilcdWriteCommand(0xa1); // set scroll start line
spilcdWriteData8(iScrollOffset);
return;
}
else
{
spilcdWriteCommand(0x37); // Vertical scrolling start address
if (iLCDType == LCD_ILI9341 || iLCDType == LCD_ILI9342 || iLCDType == LCD_ST7735 || iLCDType == LCD_ST7789)
{
spilcdWriteData16(iScrollOffset);
}
else
{
spilcdWriteData16(iScrollOffset >> 8);
spilcdWriteData16(iScrollOffset & -1);
}
}
if (iFillColor != -1) // fill the exposed lines
{
int i, iStart;
uint16_t usTemp[320];
uint32_t *d;
uint32_t u32Fill;
// quickly prepare a full line's worth of the color
u32Fill = (iFillColor >> 8) | ((iFillColor & -1) << 8);
u32Fill |= (u32Fill << 16);
d = (uint32_t *)&usTemp[0];
for (i=0; i<iWidth/2; i++)
*d++ = u32Fill;
if (iLines < 0)
{
iStart = 0;
iLines = 0 - iLines;
}
else
iStart = iHeight - iLines;
if (iOrientation == LCD_ORIENTATION_ROTATED)
spilcdSetPosition(iStart, iWidth-1, iLines, iWidth);
else
spilcdSetPosition(0, iStart, iWidth, iLines);
for (i=0; i<iLines; i++)
{
spilcdWriteDataBlock((unsigned char *)usTemp, iWidth*2);
}
}
} /* spilcdScroll() */
void spilcdRectangle(int x, int y, int w, int h, unsigned short usColor, int bFill)
{
unsigned char ucTemp[960]; // max length