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https://github.com/randybb/esphome-configs.git
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351
components/st7735/st7735.cpp
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351
components/st7735/st7735.cpp
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#include "st7735.h"
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#include "esphome/core/log.h"
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#include "esphome/components/display/display_buffer.h"
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namespace esphome {
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namespace st7735 {
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#define ST_CMD_DELAY 0x80 // special signifier for command lists
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#define ST77XX_NOP 0x00
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#define ST77XX_SWRESET 0x01
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#define ST77XX_RDDID 0x04
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#define ST77XX_RDDST 0x09
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#define ST77XX_SLPIN 0x10
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#define ST77XX_SLPOUT 0x11
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#define ST77XX_PTLON 0x12
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#define ST77XX_NORON 0x13
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#define ST77XX_INVOFF 0x20
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#define ST77XX_INVON 0x21
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#define ST77XX_DISPOFF 0x28
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#define ST77XX_DISPON 0x29
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#define ST77XX_CASET 0x2A
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#define ST77XX_RASET 0x2B
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#define ST77XX_RAMWR 0x2C
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#define ST77XX_RAMRD 0x2E
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#define ST77XX_PTLAR 0x30
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#define ST77XX_TEOFF 0x34
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#define ST77XX_TEON 0x35
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#define ST77XX_MADCTL 0x36
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#define ST77XX_COLMOD 0x3A
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#define ST77XX_MADCTL_MY 0x80
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#define ST77XX_MADCTL_MX 0x40
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#define ST77XX_MADCTL_MV 0x20
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#define ST77XX_MADCTL_ML 0x10
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#define ST77XX_MADCTL_RGB 0x00
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#define ST77XX_RDID1 0xDA
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#define ST77XX_RDID2 0xDB
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#define ST77XX_RDID3 0xDC
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#define ST77XX_RDID4 0xDD
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// some flags for initR() :(
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#define INITR_GREENTAB 0x00
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#define INITR_REDTAB 0x01
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#define INITR_BLACKTAB 0x02
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#define INITR_18GREENTAB INITR_GREENTAB
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#define INITR_18REDTAB INITR_REDTAB
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#define INITR_18BLACKTAB INITR_BLACKTAB
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#define INITR_144GREENTAB 0x01
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#define INITR_MINI160x80 0x04
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#define INITR_HALLOWING 0x05
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// Some register settings
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#define ST7735_MADCTL_BGR 0x08
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#define ST7735_MADCTL_MH 0x04
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#define ST7735_FRMCTR1 0xB1
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#define ST7735_FRMCTR2 0xB2
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#define ST7735_FRMCTR3 0xB3
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#define ST7735_INVCTR 0xB4
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#define ST7735_DISSET5 0xB6
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#define ST7735_PWCTR1 0xC0
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#define ST7735_PWCTR2 0xC1
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#define ST7735_PWCTR3 0xC2
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#define ST7735_PWCTR4 0xC3
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#define ST7735_PWCTR5 0xC4
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#define ST7735_VMCTR1 0xC5
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#define ST7735_PWCTR6 0xFC
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#define ST7735_GMCTRP1 0xE0
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#define ST7735_GMCTRN1 0xE1
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static const uint8_t PROGMEM
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Rcmd1[] = { // 7735R init, part 1 (red or green tab)
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15, // 15 commands in list:
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ST77XX_SWRESET, ST_CMD_DELAY, // 1: Software reset, 0 args, w/delay
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150, // 150 ms delay
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ST77XX_SLPOUT, ST_CMD_DELAY, // 2: Out of sleep mode, 0 args, w/delay
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255, // 500 ms delay
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ST7735_FRMCTR1, 3, // 3: Framerate ctrl - normal mode, 3 arg:
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0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D)
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ST7735_FRMCTR2, 3, // 4: Framerate ctrl - idle mode, 3 args:
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0x01, 0x2C, 0x2D, // Rate = fosc/(1x2+40) * (LINE+2C+2D)
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ST7735_FRMCTR3, 6, // 5: Framerate - partial mode, 6 args:
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0x01, 0x2C, 0x2D, // Dot inversion mode
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0x01, 0x2C, 0x2D, // Line inversion mode
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ST7735_INVCTR, 1, // 6: Display inversion ctrl, 1 arg:
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0x07, // No inversion
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ST7735_PWCTR1, 3, // 7: Power control, 3 args, no delay:
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0xA2,
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0x02, // -4.6V
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0x84, // AUTO mode
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ST7735_PWCTR2, 1, // 8: Power control, 1 arg, no delay:
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0xC5, // VGH25=2.4C VGSEL=-10 VGH=3 * AVDD
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ST7735_PWCTR3, 2, // 9: Power control, 2 args, no delay:
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0x0A, // Opamp current small
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0x00, // Boost frequency
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ST7735_PWCTR4, 2, // 10: Power control, 2 args, no delay:
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0x8A, // BCLK/2,
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0x2A, // opamp current small & medium low
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ST7735_PWCTR5, 2, // 11: Power control, 2 args, no delay:
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0x8A, 0xEE,
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ST7735_VMCTR1, 1, // 12: Power control, 1 arg, no delay:
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0x0E,
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ST77XX_INVOFF, 0, // 13: Don't invert display, no args
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ST77XX_MADCTL, 1, // 14: Mem access ctl (directions), 1 arg:
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0xC8, // row/col addr, bottom-top refresh
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ST77XX_COLMOD, 1, // 15: set color mode, 1 arg, no delay:
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0x05 }, // 16-bit color
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Rcmd2green[] = { // 7735R init, part 2 (green tab only)
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2, // 2 commands in list:
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ST77XX_CASET, 4, // 1: Column addr set, 4 args, no delay:
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0x00, 0x02, // XSTART = 0
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0x00, 0x7F+0x02, // XEND = 127
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ST77XX_RASET, 4, // 2: Row addr set, 4 args, no delay:
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0x00, 0x01, // XSTART = 0
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0x00, 0x9F+0x01 }, // XEND = 159
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Rcmd2green144[] = { // 7735R init, part 2 (green 1.44 tab)
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2, // 2 commands in list:
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ST77XX_CASET, 4, // 1: Column addr set, 4 args, no delay:
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0x00, 0x00, // XSTART = 0
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0x00, 0x7F, // XEND = 127
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ST77XX_RASET, 4, // 2: Row addr set, 4 args, no delay:
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0x00, 0x00, // XSTART = 0
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0x00, 0x7F }, // XEND = 127
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Rcmd3[] = { // 7735R init, part 3 (red or green tab)
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4, // 4 commands in list:
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ST7735_GMCTRP1, 16 , // 1: Gamma Adjustments (pos. polarity), 16 args + delay:
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0x02, 0x1c, 0x07, 0x12, // (Not entirely necessary, but provides
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0x37, 0x32, 0x29, 0x2d, // accurate colors)
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0x29, 0x25, 0x2B, 0x39,
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0x00, 0x01, 0x03, 0x10,
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ST7735_GMCTRN1, 16 , // 2: Gamma Adjustments (neg. polarity), 16 args + delay:
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0x03, 0x1d, 0x07, 0x06, // (Not entirely necessary, but provides
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0x2E, 0x2C, 0x29, 0x2D, // accurate colors)
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0x2E, 0x2E, 0x37, 0x3F,
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0x00, 0x00, 0x02, 0x10,
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ST77XX_NORON, ST_CMD_DELAY, // 3: Normal display on, no args, w/delay
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10, // 10 ms delay
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ST77XX_DISPON, ST_CMD_DELAY, // 4: Main screen turn on, no args w/delay
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100 }; // 100 ms delay
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static const char *TAG = "st7735";
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void ST7735::setup() {
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ESP_LOGCONFIG(TAG, "Setting up SPI ST7735...");
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this->spi_setup();
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this->dc_pin_->setup(); // OUTPUT
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this->init_reset_();
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this->displayInit(Rcmd1);
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this->displayInit(Rcmd2green);
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this->displayInit(Rcmd3);
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this->writecommand(ST7735_INVON);
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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//this->disable();
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delay(120);
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//this->enable();
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this->writecommand(ST7735_DISPON); //Display on
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delay(120);
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this->init_internal_(this->get_buffer_length_());
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memset(this->buffer_, 0x00, this->get_buffer_length_());
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}
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void ST7735::write_display_data() {
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uint16_t offsetx = 26;
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uint16_t offsety = 1;
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uint16_t x1 = offsetx;
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uint16_t x2 = x1 + get_width_internal()-1;
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uint16_t y1 = offsety;
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uint16_t y2 = y1 + get_height_internal()-1;
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this->enable();
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// set column(x) address
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this->dc_pin_->digital_write(false);
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this->write_byte(ST77XX_CASET);
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this->dc_pin_->digital_write(true);
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this->spi_master_write_addr(x1, x2);
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// set Page(y) address
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this->dc_pin_->digital_write(false);
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this->write_byte(ST77XX_RASET);
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this->dc_pin_->digital_write(true);
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this->spi_master_write_addr(y1, y2);
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// Memory Write
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this->dc_pin_->digital_write(false);
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this->write_byte(ST77XX_RAMWR);
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this->dc_pin_->digital_write(true);
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this->write_array(this->buffer_, this->get_buffer_length_());
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this->disable();
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}
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void ST7735::spi_master_write_addr(uint16_t addr1, uint16_t addr2)
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{
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static uint8_t Byte[4];
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Byte[0] = (addr1 >> 8) & 0xFF;
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Byte[1] = addr1 & 0xFF;
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Byte[2] = (addr2 >> 8) & 0xFF;
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Byte[3] = addr2 & 0xFF;
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this->dc_pin_->digital_write(true);
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this->write_array(Byte, 4);
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}
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void ST7735::spi_master_write_color(uint16_t color, uint16_t size)
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{
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static uint8_t Byte[1024];
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int index = 0;
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for(int i=0;i<size;i++) {
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Byte[index++] = (color >> 8) & 0xFF;
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Byte[index++] = color & 0xFF;
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}
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this->dc_pin_->digital_write(true);
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return write_array(Byte, size*2);
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}
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void ST7735::dump_config() {
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LOG_DISPLAY("", "SPI ST7735", this);
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LOG_PIN(" CS Pin: ", this->cs_);
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LOG_PIN(" DC Pin: ", this->dc_pin_);
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LOG_PIN(" Reset Pin: ", this->reset_pin_);
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LOG_UPDATE_INTERVAL(this);
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}
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float ST7735::get_setup_priority() const {
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return setup_priority::PROCESSOR;
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}
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void ST7735::update() {
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this->do_update_();
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this->write_display_data();
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}
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void ST7735::loop() {
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}
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int ST7735::get_width_internal() {
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return 80;
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}
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int ST7735::get_height_internal() {
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return 160;
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}
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size_t ST7735::get_buffer_length_() {
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return size_t(this->get_width_internal()) * size_t(this->get_height_internal()) * 2;
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}
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void HOT ST7735::draw_absolute_pixel_internal(int x, int y, Color color) {
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if (x >= this->get_width_internal() || x < 0 || y >= this->get_height_internal() || y < 0)
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return;
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const uint32_t color565 = color.to_rgb_565();
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// where should the bits go in the big buffer array? math...
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uint16_t pos = (x + y * this->get_width_internal()) * 2;
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this->buffer_[pos++] = (color565 >> 8) & 0xff;
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this->buffer_[pos] = color565 & 0xff;
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}
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void ST7735::displayInit(const uint8_t *addr) {
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uint8_t numCommands, cmd, numArgs;
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uint16_t ms;
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numCommands = pgm_read_byte(addr++); // Number of commands to follow
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while(numCommands--) { // For each command...
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cmd = pgm_read_byte(addr++); // Read command
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numArgs = pgm_read_byte(addr++); // Number of args to follow
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ms = numArgs & ST_CMD_DELAY; // If hibit set, delay follows args
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numArgs &= ~ST_CMD_DELAY; // Mask out delay bit
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this->sendcommand(cmd, addr, numArgs);
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addr += numArgs;
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if(ms) {
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ms = pgm_read_byte(addr++); // Read post-command delay time (ms)
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if(ms == 255) ms = 500; // If 255, delay for 500 ms
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delay(ms);
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}
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}
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}
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void ST7735::init_reset_() {
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if (this->reset_pin_ != nullptr) {
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this->reset_pin_->setup();
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this->reset_pin_->digital_write(true);
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delay(1);
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// Trigger Reset
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this->reset_pin_->digital_write(false);
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delay(10);
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// Wake up
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this->reset_pin_->digital_write(true);
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}
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}
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void ST7735::writecommand(uint8_t value) {
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this->enable();
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this->dc_pin_->digital_write(false);
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this->write_byte(value);
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this->dc_pin_->digital_write(true);
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this->disable();
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}
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void ST7735::writedata(uint8_t value) {
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this->dc_pin_->digital_write(true);
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this->enable();
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this->write_byte(value);
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this->disable();
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}
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void ST7735::sendcommand(uint8_t cmd, const uint8_t* dataBytes, uint8_t numDataBytes) {
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this->writecommand(cmd);
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this->senddata(dataBytes,numDataBytes);
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}
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void ST7735::senddata(const uint8_t* dataBytes, uint8_t numDataBytes) {
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this->dc_pin_->digital_write(true); //pull DC high to indicate data
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this->cs_->digital_write(false);
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this->enable();
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for (uint8_t i=0; i<numDataBytes; i++) {
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this->transfer_byte(pgm_read_byte(dataBytes++)); //write byte - SPI library
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}
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this->cs_->digital_write(true);
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this->disable();
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}
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} // namespace st7735
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} // namespace esphome
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