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Add display_pack_28 and demo with FPS, fix spi for rp2350 in st7789
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‎drivers/st7789/st7789.hpp

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@@ -47,7 +47,13 @@ namespace pimoroni {
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// The ST7789 requires 16 ns between SPI rising edges.
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// 16 ns = 62,500,000 Hz
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static const uint32_t SPI_BAUD = 62'500'000;
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// 2350 doesn't support 62,500,000 so use 75,000,000 seems to work.
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#if !PICO_RP2350
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static const uint32_t SPI_BAUD = 62'500'000;
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#else
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static const uint32_t SPI_BAUD = 75'000'000;
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#endif
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public:

‎examples/CMakeLists.txt

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@@ -30,6 +30,7 @@ add_subdirectory(breakout_mlx90640)
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add_subdirectory(pico_display)
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add_subdirectory(pico_display_2)
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add_subdirectory(pico_display_28)
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add_subdirectory(pico_unicorn)
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add_subdirectory(pico_unicorn_plasma)
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add_subdirectory(pico_scroll)

‎examples/pico_display_28/CMakeLists.txt

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set(OUTPUT_NAME pico_display28_demo)
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add_executable(
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${OUTPUT_NAME}
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pico_display_28_demo.cpp
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)
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# Pull in pico libraries that we need
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target_link_libraries(${OUTPUT_NAME} pico_stdlib hardware_spi hardware_pwm hardware_dma rgbled button pico_display_28 st7789 pico_graphics)
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# create map/bin/hex file etc.
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pico_add_extra_outputs(${OUTPUT_NAME})

‎examples/pico_display_28/pico_display_2_demo.cpp

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#include <string.h>
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#include <math.h>
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#include <vector>
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#include <cstdlib>
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#include "libraries/pico_display_28/pico_display_28.hpp"
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#include "drivers/st7789/st7789.hpp"
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#include "libraries/pico_graphics/pico_graphics.hpp"
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#include "rgbled.hpp"
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#include "button.hpp"
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using namespace pimoroni;
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ST7789 st7789(320, 240, ROTATE_0, false, get_spi_pins(BG_SPI_FRONT));
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PicoGraphics_PenRGB332 graphics(st7789.width, st7789.height, nullptr);
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RGBLED led(PicoDisplay28::LED_R, PicoDisplay28::LED_G, PicoDisplay28::LED_B);
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Button button_a(PicoDisplay28::A);
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Button button_b(PicoDisplay28::B);
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Button button_x(PicoDisplay28::X);
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Button button_y(PicoDisplay28::Y);
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int main() {
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char fpsbuf[512]; // Make sure buffer don't overflow
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int frame_counter; // Counter for number of frames displayed
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uint64_t start, elapsed; // Microsecond timers
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float fps; // Frames per second to display
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frame_counter = 0;
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st7789.set_backlight(255);
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led.set_rgb(0, 0, 0);
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struct pt {
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float x;
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float y;
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uint8_t r;
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float dx;
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float dy;
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uint16_t pen;
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};
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std::vector<pt> shapes;
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for(int i = 0; i < 100; i++) {
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pt shape;
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shape.x = rand() % graphics.bounds.w;
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shape.y = rand() % graphics.bounds.h;
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shape.r = (rand() % 10) + 3;
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shape.dx = float(rand() % 255) / 64.0f;
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shape.dy = float(rand() % 255) / 64.0f;
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shape.pen = graphics.create_pen(rand() % 255, rand() % 255, rand() % 255);
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shapes.push_back(shape);
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}
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Point text_location(0, 0);
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Pen BG = graphics.create_pen(120, 40, 60);
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Pen WHITE = graphics.create_pen(255, 255, 255);
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start = time_us_64();
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// Get the start time
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while(true) {
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if(button_a.raw()) text_location.x -= 1;
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if(button_b.raw()) text_location.x += 1;
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if(button_x.raw()) text_location.y -= 1;
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if(button_y.raw()) text_location.y += 1;
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graphics.set_pen(BG);
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graphics.clear();
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for(auto &shape : shapes) {
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shape.x += shape.dx;
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shape.y += shape.dy;
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if((shape.x - shape.r) < 0) {
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shape.dx *= -1;
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shape.x = shape.r;
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}
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if((shape.x + shape.r) >= graphics.bounds.w) {
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shape.dx *= -1;
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shape.x = graphics.bounds.w - shape.r;
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}
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if((shape.y - shape.r) < 0) {
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shape.dy *= -1;
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shape.y = shape.r;
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}
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if((shape.y + shape.r) >= graphics.bounds.h) {
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shape.dy *= -1;
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shape.y = graphics.bounds.h - shape.r;
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}
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graphics.set_pen(shape.pen);
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graphics.circle(Point(shape.x, shape.y), shape.r);
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}
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// Since HSV takes a float from 0.0 to 1.0 indicating hue,
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// then we can divide millis by the number of milliseconds
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// we want a full colour cycle to take. 5000 = 5 sec
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RGB p = RGB::from_hsv((float)millis() / 5000.0f, 1.0f, 0.5f + sinf(millis() / 100.0f / 3.14159f) * 0.5f);
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led.set_rgb(p.r, p.g, p.b);
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frame_counter++;
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elapsed = time_us_64();
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// Get the current time to calculate the elapsed time next
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fps = (frame_counter / float(elapsed - start)) * 1000000;
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sprintf(fpsbuf, "Frame = %d, FPS = %5.2f", frame_counter, fps);
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// Create output text
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graphics.set_pen(WHITE);
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graphics.text(fpsbuf, text_location, 320, 2);
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// Render Frame counter and FPS to screen
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// update screen
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st7789.update(&graphics);
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}
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return 0;
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}

‎libraries/CMakeLists.txt

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@@ -20,6 +20,7 @@ add_subdirectory(breakout_bh1745)
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add_subdirectory(pico_graphics)
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add_subdirectory(pico_display)
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add_subdirectory(pico_display_2)
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add_subdirectory(pico_display_28)
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add_subdirectory(pico_unicorn)
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add_subdirectory(pico_scroll)
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add_subdirectory(pico_explorer)

‎libraries/pico_display_28/CMakeLists.txt

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set(LIB_NAME pico_display_28)
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add_library(${LIB_NAME} INTERFACE)
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target_sources(${LIB_NAME} INTERFACE
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${CMAKE_CURRENT_LIST_DIR}/${LIB_NAME}.cpp
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)
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target_include_directories(${LIB_NAME} INTERFACE ${CMAKE_CURRENT_LIST_DIR})
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# Pull in pico libraries that we need
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target_link_libraries(${LIB_NAME} INTERFACE pico_stdlib hardware_spi hardware_pwm hardware_dma st7789 pico_graphics)

‎libraries/pico_display_28/README.md

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# Pico Display 2.8" Pack <!-- omit in toc -->
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Our Pico Display Pack offers a vibrant 2.8" (320x240) IPS LCD screen for your Raspberry Pi Pico it also includes four switches and and an RGB LED!
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- [Example Program](#example-program)
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- [Function Reference](#function-reference)
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- [PicoGraphics](#picographics)
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- [ST7789](#st7789)
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## Example Program
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The following example sets up Pico Display, displays some basic demo text and graphics and will illuminate the RGB LED green if the A button is pressed.
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```c++
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#include "pico_display_28.hpp"
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#include "drivers/st7789/st7789.hpp"
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#include "libraries/pico_graphics/pico_graphics.hpp"
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#include "rgbled.hpp"
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#include "button.hpp"
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// Display driver
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ST7789 st7789(PicoDisplay28::WIDTH, PicoDisplay28::HEIGHT, ROTATE_0, false, get_spi_pins(BG_SPI_FRONT));
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// Graphics library - in RGB332 mode you get 256 colours and optional dithering for 75K RAM.
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PicoGraphics_PenRGB332 graphics(st7789.width, st7789.height, nullptr);
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// RGB LED
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RGBLED led(PicoDisplay28::LED_R, PicoDisplay28::LED_G, PicoDisplay28::LED_B);
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// And each button
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Button button_a(PicoDisplay28::A);
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Button button_b(PicoDisplay28::B);
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Button button_x(PicoDisplay28::X);
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Button button_y(PicoDisplay28::Y);
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int main() {
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// set the backlight to a value between 0 and 255
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// the backlight is driven via PWM and is gamma corrected by our
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// library to give a gorgeous linear brightness range.
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st7789.set_backlight(100);
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while(true) {
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// detect if the A button is pressed (could be A, B, X, or Y)
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if(button_a.raw(display.A)) {
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// make the led glow green
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// parameters are red, green, blue all between 0 and 255
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// these are also gamma corrected
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led.set_rgb(0, 255, 0);
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}
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// set the colour of the pen
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// parameters are red, green, blue all between 0 and 255
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graphics.set_pen(30, 40, 50);
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// fill the screen with the current pen colour
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graphics.clear();
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// draw a box to put some text in
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graphics.set_pen(10, 20, 30);
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Rect text_rect(10, 10, 150, 150);
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graphics.rectangle(text_rect);
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// write some text inside the box with 10 pixels of margin
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// automatically word wrapping
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text_rect.deflate(10);
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graphics.set_pen(110, 120, 130);
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graphics.text("This is a message", Point(text_rect.x, text_rect.y), text_rect.w);
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// now we've done our drawing let's update the screen
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st7789.update(&graphics);
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}
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}
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```
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## Function Reference
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### PicoGraphics
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Pico Display uses our Pico Graphics library to draw graphics and text. For more information [read the Pico Graphics function reference.](../pico_graphics/README.md#function-reference).
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### ST7789
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Pico Display uses the ST7789 display driver to handle the LCD. For more information [read the ST7789 README.](../../drivers/st7789/README.md).

‎libraries/pico_display_28/pico_display_28.cmake

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add_library(pico_display_28 INTERFACE)
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target_sources(pico_display_28 INTERFACE
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${CMAKE_CURRENT_LIST_DIR}/pico_display_28.cpp
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)
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target_include_directories(pico_display_28 INTERFACE ${CMAKE_CURRENT_LIST_DIR})
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# Pull in pico libraries that we need
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target_link_libraries(pico_display_28 INTERFACE pico_stdlib)

‎libraries/pico_display_28/pico_display_28.cpp

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#include "pico_display_28.hpp"

‎libraries/pico_display_28/pico_display_28.hpp

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#pragma once
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#include "pico/stdlib.h"
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namespace pimoroni {
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class PicoDisplay28 {
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public:
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static const int WIDTH = 320;
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static const int HEIGHT = 240;
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static const uint8_t A = 12;
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static const uint8_t B = 13;
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static const uint8_t X = 14;
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static const uint8_t Y = 15;
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static const uint8_t LED_R = 26;
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static const uint8_t LED_G = 27;
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static const uint8_t LED_B = 28;
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};
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}

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