kopia lustrzana https://github.com/pimoroni/pimoroni-pico
inital work needs testing
Gee Bartlett
rodzic
fb8cde305d
commit
3f24b442f1
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include(st7735.cmake)
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set(DRIVER_NAME st7735)
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add_library(${DRIVER_NAME} INTERFACE)
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target_sources(${DRIVER_NAME} INTERFACE
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${CMAKE_CURRENT_LIST_DIR}/${DRIVER_NAME}.cpp)
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target_include_directories(${DRIVER_NAME} INTERFACE ${CMAKE_CURRENT_LIST_DIR})
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# Pull in pico libraries that we need
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target_link_libraries(${DRIVER_NAME} INTERFACE pico_stdlib pimoroni_bus hardware_spi hardware_pwm hardware_dma)
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#include "ST7567.hpp"
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#include <cstdlib>
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#include <math.h>
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#include "hardware/dma.h"
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#include "hardware/pwm.h"
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namespace pimoroni {
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enum reg : uint8_t {
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DISPOFF = 0xAE,//
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DISPON = 0xAF,//
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SETSTARTLINE = 0x40,//
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STARTLINE_MASK = 0x3f,//
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REG_RATIO = 0x20,//
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SETPAGESTART = 0xb0,//
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PAGESTART_MASK = 0x07,//
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SETCOLL = 0x00, // # 0x00-0x0f: Set lower column address */
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COLL_MASK = 0x0f,//
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SETCOLH = 0x10, //# 0x10-0x1f: Set higher column address */
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COLH_MASK = 0x0F,//
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SEG_DIR_NORMAL = 0xa0, //# 0xa0: Column address 0 is mapped to SEG0 */
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SEG_DIR_REV = 0xa1, //# 0xa1: Column address 128 is mapped to S
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DISPNORMAL = 0xa6, //# 0xa6: Normal display */
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DISPINVERSE = 0xa7, //# 0xa7: Inverse disp
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DISPRAM = 0xa4, //# 0xa4: Resume to RAM content display */
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DISPENTIRE = 0xa5, //# 0xa5: Entire display
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BIAS_1_9 = 0xa2, //# 0xa2: Select BIAS setting 1/9 */
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BIAS_1_7 = 0xa3, // # 0xa3: Select BIAS setting
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ENTER_RMWMODE = 0xe0, //# 0xe0: Enter the Read Modify Write mode */
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EXIT_RMWMODE = 0xee, //# 0xee: Leave the Read Modify Write mode */
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EXIT_SOFTRST = 0xe2, // # 0xe2: Software RE
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SETCOMNORMAL = 0xc0, //# 0xc0: Set COM output direction, normal mode */
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SETCOMREVERSE = 0xc8, // # 0xc8: Set COM output direction, reverse m
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POWERCTRL_VF = 0x29, //# 0x29: Control built-in power circuit */
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POWERCTRL_VR = 0x2a, //# 0x2a: Control built-in power circuit */
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POWERCTRL_VB = 0x2c, //# 0x2c: Control built-in power circuit */
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POWERCTRL = 0x2f, // # 0x2c: Control built-in power circ
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REG_RES_RR0 = 0x21, //# 0x21: Regulation Resistior ratio */
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REG_RES_RR1 = 0x22, //# 0x22: Regulation Resistior ratio */
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REG_RES_RR2 = 0x24, // # 0x24: Regulation Resistior ra
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SETCONTRAST = 0x81, // # 0x81: Set contrast cont
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SETBOOSTER = 0xf8, //# Set booster level */
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SETBOOSTER4X = 0x00, //# Set booster level */
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SETBOOSTER5X = 0x01 , // # Set booster le
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NOP = 0xe3, //# 0xe3: NOP Command for no operation */
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STARTBYTES = 0,
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};
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void ST7567::reset() {
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if(RESET == PIN_UNUSED) return;
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gpio_put(RESET, 0); sleep_ms(10);
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gpio_put(RESET, 1); sleep_ms(10);
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sleep_ms(100);
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}
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void ST7567::init(bool auto_init_sequence) {
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spi_init(spi, spi_baud);
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gpio_set_function(reset, GPIO_FUNC_SIO);
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gpio_set_dir(reset, GPIO_OUT);
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gpio_set_function(dc, GPIO_FUNC_SIO);
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gpio_set_dir(dc, GPIO_OUT);
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gpio_set_function(cs, GPIO_FUNC_SIO);
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gpio_set_dir(cs, GPIO_OUT);
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gpio_set_function(sck, GPIO_FUNC_SPI);
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gpio_set_function(mosi, GPIO_FUNC_SPI);
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// if a backlight pin is provided then set it up for
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// pwm control
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if(bl != PIN_UNUSED) {
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pwm_config cfg = pwm_get_default_config();
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pwm_set_wrap(pwm_gpio_to_slice_num(bl), 65535);
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pwm_init(pwm_gpio_to_slice_num(bl), &cfg, true);
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gpio_set_function(bl, GPIO_FUNC_PWM);
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set_backlight(0); // Turn backlight off initially to avoid nasty surprises
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}
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//reset display
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reset();
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// if auto_init_sequence then send initialisation sequence
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// for our standard displays based on the width and height
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if(auto_init_sequence) {
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command(reg::BIAS_1_7);
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command(reg::SEG_DIR_NORMAL);
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command(reg::SETCOMREVERSE);
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command(reg::DISPNORMAL);
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command(reg::SETSTARTLINE | 0x00); //Startline from 0x40-0x7F
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command(reg::POWERCTRL);
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command(reg::REG_RATIO | 3);
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command(reg::DISPON);
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command(reg::SETCONTRAST);
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command(58); // defalut contrast level
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}
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if(bl != PIN_UNUSED) {
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set_backlight(255); // Turn backlight on now surprises have passed
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}
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}
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void ST7567::command(uint8_t command, size_t len, const char *data) {
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gpio_put(cs, 0);
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gpio_put(dc, 0); // command mode
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spi_write_blocking(spi, &command, 1);
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if(data) {
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gpio_put(dc, 1); // data mode
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spi_write_blocking(spi, (const uint8_t*)data, len);
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}
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gpio_put(cs, 1);
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}
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// Native 16-bit framebuffer update
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void ST7567::update(PicoGraphics *graphics) {
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uint8_t offset;
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uint8_t *fb = (uint8_t *)graphics->frame_buffer;
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if(graphics->pen_type == PicoGraphics::PEN_1BIT) {
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command(reg::ENTER_RWMODE);
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for (uint8_t page=0; page < 8 ; page++){
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command(reg::SETPAGESTART | page);
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command(reg::SETCOLL);
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command(reg::SETCOLH);
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gpio_put(dc, 1); // data mode
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gpio_put(cs, 0);
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spi_write_blocking(spi, fb, PAGESIZE / 8);
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fb += PAGESIZE / 8;
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gpio_put(cs, 1);
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}
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} else {
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command(reg::ENTER_RWMODE);
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gpio_put(dc, 1); // data mode
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gpio_put(cs, 0);
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graphics->frame_convert(PicoGraphics::PEN_1BIT, [this](void *data, size_t length) {
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if (length > 0) {
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for (uint8_t page=0; page < 8 ; page++){
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offset = page * PAGESIZE;
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command(reg::SETPAGESTART | page);
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command(reg::SETCOLL);
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command(reg::SETCOLH);
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gpio_put(dc, 1); // data mode
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gpio_put(cs, 0);
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spi_write_blocking(spi, (const uint8_t*)data[offset/8], PAGESIZE / 8);
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gpio_put(cs, 1);
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}
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});
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gpio_put(cs, 1);
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}
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}
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void ST7567::set_backlight(uint8_t brightness) {
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// gamma correct the provided 0-255 brightness value onto a
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// 0-65535 range for the pwm counter
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float gamma = 2.8;
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uint16_t value = (uint16_t)(pow((float)(brightness) / 255.0f, gamma) * 65535.0f + 0.5f);
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pwm_set_gpio_level(bl, value);
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}
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}
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#pragma once
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#include "hardware/spi.h"
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#include "hardware/gpio.h"
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#include "common/pimoroni_common.hpp"
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#include "common/pimoroni_bus.hpp"
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#include "libraries/pico_graphics/pico_graphics.hpp"
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namespace pimoroni {
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class ST7567 : public DisplayDriver {
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//--------------------------------------------------
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// Constants
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//--------------------------------------------------
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private:
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static const uint8_t ROWS = 128;
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static const uint8_t COLS = 64;
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static const uint8_t PAGESIZE = 128;
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//--------------------------------------------------
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// Variables
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//--------------------------------------------------
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private:
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spi_inst_t *spi = spi0;
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uint32_t dma_channel;
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// interface pins with our standard defaults where appropriate
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uint cs = SPI_BG_FRONT_CS;
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uint dc = 20;
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uint sck = SPI_DEFAULT_SCK ;
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uint mosi = SPI_DEFAULT_MOSI;
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uint bl = PIN_UNUSED;
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uint reset = PIN_UNUSED;
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uint32_t spi_baud = 30 * 1024 * 1024;
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uint8_t offset_cols = 0;
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uint8_t offset_rows = 0;
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//--------------------------------------------------
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// Constructors/Destructor
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//--------------------------------------------------
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public:
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ST7567(uint16_t width, uint16_t height, Rotation rotate) : ST7567(width, height, rotate, {PIMORONI_SPI_DEFAULT_INSTANCE, SPI_BG_FRONT_CS, SPI_DEFAULT_SCK, SPI_DEFAULT_MOSI, PIN_UNUSED, 20, PIN_UNUSED}) {};
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ST7567(uint16_t width, uint16_t height, SPIPins pins, uint busy=26, uint reset=21) :
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DisplayDriver(width, height, ROTATE_0),
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spi(pins.spi),
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CS(pins.cs), DC(pins.dc), SCK(pins.sck), MOSI(pins.mosi), BUSY(busy), RESET(reset) {
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init();
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}
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//--------------------------------------------------
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// Methods
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//--------------------------------------------------
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public:
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void update(PicoGraphics *graphics) override;
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void set_backlight(uint8_t brightness) override;
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private:
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void init(bool auto_init_sequence = true);
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void command(uint8_t command, size_t len = 0, const char *data = NULL);
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};
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}
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{
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"folders": [
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{
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"path": "."
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}
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]
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}
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