mirror of
https://github.com/goodtft/LCD-show.git
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123 lines
4.0 KiB
C++
123 lines
4.0 KiB
C++
#include "config.h"
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// TODO: Share common parts of this file with ILI9341 to avoid code duplication
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#ifdef HX8357D
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#include "spi.h"
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#include <memory.h>
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#include <stdio.h>
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void InitHX8357D()
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{
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// If a Reset pin is defined, toggle it briefly high->low->high to enable the device. Some devices do not have a reset pin, in which case compile with GPIO_TFT_RESET_PIN left undefined.
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#if defined(GPIO_TFT_RESET_PIN) && GPIO_TFT_RESET_PIN >= 0
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printf("Resetting display at reset GPIO pin %d\n", GPIO_TFT_RESET_PIN);
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SET_GPIO_MODE(GPIO_TFT_RESET_PIN, 1);
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SET_GPIO(GPIO_TFT_RESET_PIN);
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usleep(120 * 1000);
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CLEAR_GPIO(GPIO_TFT_RESET_PIN);
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usleep(120 * 1000);
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SET_GPIO(GPIO_TFT_RESET_PIN);
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usleep(120 * 1000);
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#endif
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// Do the initialization with a very low SPI bus speed, so that it will succeed even if the bus speed chosen by the user is too high.
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spi->clk = 34;
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__sync_synchronize();
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BEGIN_SPI_COMMUNICATION();
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{
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SPI_TRANSFER(0x01/*Software Reset*/);
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usleep(5*1000);
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SPI_TRANSFER(0x28/*Display OFF*/);
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#define MADCTL_BGR_PIXEL_ORDER (1<<3)
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#define MADCTL_ROW_COLUMN_EXCHANGE (1<<5)
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#define MADCTL_COLUMN_ADDRESS_ORDER_SWAP (1<<6)
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#define MADCTL_ROW_ADDRESS_ORDER_SWAP (1<<7)
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#define MADCTL_ROTATE_180_DEGREES (MADCTL_COLUMN_ADDRESS_ORDER_SWAP | MADCTL_ROW_ADDRESS_ORDER_SWAP)
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uint8_t madctl = 0;
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#ifndef DISPLAY_SWAP_BGR
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madctl |= MADCTL_BGR_PIXEL_ORDER;
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#endif
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#if defined(DISPLAY_FLIP_ORIENTATION_IN_HARDWARE)
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madctl |= MADCTL_ROW_COLUMN_EXCHANGE;
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#endif
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#ifdef DISPLAY_ROTATE_180_DEGREES
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madctl ^= MADCTL_ROTATE_180_DEGREES;
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#endif
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SPI_TRANSFER(0x36/*MADCTL: Memory Access Control*/, madctl);
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SPI_TRANSFER(0x3A/*Interface Pixel Format*/, 0x55/*16 bits/pixel*/);
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#ifdef DISPLAY_INVERT_COLORS
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SPI_TRANSFER(0x21/*Display Inversion ON*/);
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#else
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SPI_TRANSFER(0x20/*Display Inversion OFF*/);
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#endif
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SPI_TRANSFER(0x11/*Sleep Out*/);
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usleep(120 * 1000);
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SPI_TRANSFER(0x29/*Display ON*/);
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#if defined(GPIO_TFT_BACKLIGHT) && defined(BACKLIGHT_CONTROL)
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printf("Setting TFT backlight on at pin %d\n", GPIO_TFT_BACKLIGHT);
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SET_GPIO_MODE(GPIO_TFT_BACKLIGHT, 0x01); // Set backlight pin to digital 0/1 output mode (0x01) in case it had been PWM controlled
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SET_GPIO(GPIO_TFT_BACKLIGHT); // And turn the backlight on.
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#endif
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ClearScreen();
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}
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#ifndef USE_DMA_TRANSFERS // For DMA transfers, keep SPI CS & TA active.
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END_SPI_COMMUNICATION();
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#endif
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// And speed up to the desired operation speed finally after init is done.
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usleep(10 * 1000); // Delay a bit before restoring CLK, or otherwise this has been observed to cause the display not init if done back to back after the clear operation above.
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spi->clk = SPI_BUS_CLOCK_DIVISOR;
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}
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void TurnBacklightOff()
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{
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#if defined(GPIO_TFT_BACKLIGHT) && defined(BACKLIGHT_CONTROL)
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SET_GPIO_MODE(GPIO_TFT_BACKLIGHT, 0x01); // Set backlight pin to digital 0/1 output mode (0x01) in case it had been PWM controlled
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CLEAR_GPIO(GPIO_TFT_BACKLIGHT); // And turn the backlight off.
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#endif
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}
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void TurnDisplayOff()
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{
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TurnBacklightOff();
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#if 0
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QUEUE_SPI_TRANSFER(0x28/*Display OFF*/);
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QUEUE_SPI_TRANSFER(0x10/*Enter Sleep Mode*/);
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usleep(120*1000); // Sleep off can be sent 120msecs after entering sleep mode the earliest, so synchronously sleep here for that duration to be safe.
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#endif
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// printf("Turned display OFF\n");
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}
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void TurnDisplayOn()
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{
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#if 0
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QUEUE_SPI_TRANSFER(0x11/*Sleep Out*/);
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usleep(120 * 1000);
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QUEUE_SPI_TRANSFER(0x29/*Display ON*/);
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#endif
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#if defined(GPIO_TFT_BACKLIGHT) && defined(BACKLIGHT_CONTROL)
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SET_GPIO_MODE(GPIO_TFT_BACKLIGHT, 0x01); // Set backlight pin to digital 0/1 output mode (0x01) in case it had been PWM controlled
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SET_GPIO(GPIO_TFT_BACKLIGHT); // And turn the backlight on.
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#endif
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// printf("Turned display ON\n");
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}
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void DeinitSPIDisplay()
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{
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ClearScreen();
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SPI_TRANSFER(/*Display OFF*/0x28);
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TurnBacklightOff();
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}
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#endif
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