Inky 7.3: C++ library and JPEG example compatibility.

examples/inky_frame/inky_frame_day_planner.cmake

@@ -1,14 +1,30 @@
-set(OUTPUT_NAME inky_frame_day_planner)
+# Inky Frame 5.7"
+add_executable(
+  inky_frame_day_planner
+  inky_frame_day_planner.cpp
+)
+
+# Pull in pico libraries that we need
+target_link_libraries(inky_frame_day_planner pico_stdlib inky_frame hardware_pwm hardware_spi hardware_i2c hardware_rtc fatfs sdcard pico_graphics)
 
+pico_enable_stdio_usb(inky_frame_day_planner 1)
+
+# create map/bin/hex file etc.
+pico_add_extra_outputs(inky_frame_day_planner)
+
+# Inky Frame 7.3"
 add_executable(
-  ${OUTPUT_NAME}
+  inky_frame_7_day_planner
   inky_frame_day_planner.cpp
 )
 
 # Pull in pico libraries that we need
-target_link_libraries(${OUTPUT_NAME} pico_stdlib inky_frame hardware_pwm hardware_spi hardware_i2c hardware_rtc fatfs sdcard pico_graphics)
+target_link_libraries(inky_frame_7_day_planner pico_stdlib inky_frame_7 hardware_pwm hardware_spi hardware_i2c hardware_rtc fatfs sdcard pico_graphics)
 
-pico_enable_stdio_usb(${OUTPUT_NAME} 1)
+pico_enable_stdio_usb(inky_frame_7_day_planner 1)
 
 # create map/bin/hex file etc.
-pico_add_extra_outputs(${OUTPUT_NAME})
+pico_add_extra_outputs(inky_frame_7_day_planner)
+
+target_compile_definitions(inky_frame_7_day_planner PUBLIC INKY_FRAME_7)
+

examples/inky_frame/inky_frame_day_planner.cpp

@@ -4,7 +4,11 @@
 #include <stdio.h>
 #include "pico/stdlib.h"
 
+#ifdef INKY_FRAME_7
+#include "libraries/inky_frame_7/inky_frame_7.hpp"
+#else
 #include "libraries/inky_frame/inky_frame.hpp"
+#endif
 
 using namespace pimoroni;
 

examples/inky_frame/inky_frame_jpeg_image.cmake

@@ -1,14 +1,28 @@
-set(OUTPUT_NAME inky_frame_jpeg_image)
+add_executable(
+  inky_frame_jpeg_image
+  inky_frame_jpeg_image.cpp
+)
+
+# Pull in pico libraries that we need
+target_link_libraries(inky_frame_jpeg_image pico_stdlib jpegdec inky_frame fatfs hardware_pwm hardware_spi hardware_i2c hardware_rtc fatfs sdcard pico_graphics)
+
+pico_enable_stdio_usb(inky_frame_jpeg_image 1)
+
+# create map/bin/hex file etc.
+pico_add_extra_outputs(inky_frame_jpeg_image)
+
 
 add_executable(
-  ${OUTPUT_NAME}
+  inky_frame_7_jpeg_image
   inky_frame_jpeg_image.cpp
 )
 
 # Pull in pico libraries that we need
-target_link_libraries(${OUTPUT_NAME} pico_stdlib jpegdec inky_frame fatfs hardware_pwm hardware_spi hardware_i2c hardware_rtc fatfs sdcard pico_graphics)
+target_link_libraries(inky_frame_7_jpeg_image pico_stdlib jpegdec inky_frame_7 fatfs hardware_pwm hardware_spi hardware_i2c hardware_rtc fatfs sdcard pico_graphics)
 
-pico_enable_stdio_usb(${OUTPUT_NAME} 1)
+pico_enable_stdio_usb(inky_frame_7_jpeg_image 1)
 
 # create map/bin/hex file etc.
-pico_add_extra_outputs(${OUTPUT_NAME})
+pico_add_extra_outputs(inky_frame_7_jpeg_image)
+
+target_compile_definitions(inky_frame_7_jpeg_image PUBLIC INKY_FRAME_7)

examples/inky_frame/inky_frame_jpeg_image.cpp

@@ -7,7 +7,11 @@
 
 #include "JPEGDEC.h"
 
+#ifdef INKY_FRAME_7
+#include "libraries/inky_frame_7/inky_frame_7.hpp"
+#else
 #include "libraries/inky_frame/inky_frame.hpp"
+#endif
 
 using namespace pimoroni;
 
@@ -65,6 +69,36 @@ int jpegdec_draw_callback(JPEGDRAW *draw) {
   return 1; // continue drawing
 }
 
+// Draw to the nearest colour instead of dithering
+int jpegdec_draw_posterize_callback(JPEGDRAW *draw) {
+  uint16_t *p = draw->pPixels;
+
+  int xo = jpeg_decode_options.x;
+  int yo = jpeg_decode_options.y;
+
+  for(int y = 0; y < draw->iHeight; y++) {
+    for(int x = 0; x < draw->iWidth; x++) {
+      int sx = ((draw->x + x + xo) * jpeg_decode_options.w) / jpeg.getWidth();
+      int sy = ((draw->y + y + yo) * jpeg_decode_options.h) / jpeg.getHeight();
+
+      if(xo + sx > 0 && xo + sx < inky.bounds.w && yo + sy > 0 && yo + sy < inky.bounds.h) {
+        int closest = RGB(RGB565(*p)).closest(inky.palette, inky.palette_size);
+        if (closest != -1) {
+          inky.set_pen(closest);
+          inky.set_pixel({xo + sx, yo + sy});
+        } else {
+          inky.set_pen(0);
+          inky.set_pixel({xo + sx, yo + sy});
+        }
+      }
+
+      p++;
+    }
+  }
+
+  return 1; // continue drawing
+}
+
 void draw_jpeg(std::string filename, int x, int y, int w, int h) {
 
   // TODO: this is a horrible way to do it but we need to pass some parameters
@@ -81,7 +115,8 @@ void draw_jpeg(std::string filename, int x, int y, int w, int h) {
     jpegdec_close_callback,
     jpegdec_read_callback,
     jpegdec_seek_callback,
-    jpegdec_draw_callback);
+    jpegdec_draw_callback // Try jpegdec_draw_posterize_callback
+  );
 
   jpeg.setPixelType(RGB565_BIG_ENDIAN);
 
@@ -130,7 +165,7 @@ int main() {
     }; // Wait for debugger
   }
 
-  filename = "butterfly-600x448.jpg";
+  filename = "shutterstock_172537049.jpg";
 
   //inky.led(InkyFrame::LED_E, 255);
   //sleep_ms(1000);
@@ -169,7 +204,7 @@ int main() {
   printf("done!\n");
 
   printf("Displaying file: %s\n", filename.c_str());
-  draw_jpeg(filename, 0, 0, 600, 448);
+  draw_jpeg(filename, 0, 0, inky.width, inky.height);
   printf("done!\n");
 
   inky.update();

libraries/CMakeLists.txt

@@ -36,6 +36,7 @@ add_subdirectory(inventor2040w)
 add_subdirectory(adcfft)
 add_subdirectory(jpegdec)
 add_subdirectory(inky_frame)
+add_subdirectory(inky_frame_7)
 add_subdirectory(galactic_unicorn)
 add_subdirectory(gfx_pack)
 add_subdirectory(interstate75)

libraries/inky_frame_7/CMakeLists.txt

@@ -0,0 +1 @@
+include(inky_frame_7.cmake)

libraries/inky_frame_7/inky_frame_7.cmake

@@ -0,0 +1,13 @@
+set(LIB_NAME inky_frame_7)
+add_library(${LIB_NAME} INTERFACE)
+
+target_sources(${LIB_NAME} INTERFACE
+  ${CMAKE_CURRENT_LIST_DIR}/${LIB_NAME}.cpp
+)
+
+target_include_directories(${LIB_NAME} INTERFACE ${CMAKE_CURRENT_LIST_DIR})
+
+# Pull in pico libraries that we need
+target_link_libraries(${LIB_NAME} INTERFACE hardware_i2c pico_graphics hardware_spi hardware_pwm bitmap_fonts hershey_fonts pico_stdlib sdcard fatfs pcf85063a psram_display inky73 jpegdec)
+
+target_compile_options(${LIB_NAME} INTERFACE -Wno-error=reorder)

libraries/inky_frame_7/inky_frame_7.cpp

@@ -0,0 +1,166 @@
+#include <string.h>
+#include <math.h>
+#include <functional>
+
+#include "hardware/pwm.h"
+#include "hardware/watchdog.h"
+
+#include "inky_frame_7.hpp"
+
+namespace pimoroni {
+  void gpio_configure(uint gpio, bool dir, bool value = false) {
+    gpio_set_function(gpio, GPIO_FUNC_SIO); gpio_set_dir(gpio, dir); gpio_put(gpio, value);
+  }
+
+  void gpio_configure_pwm(uint gpio) {
+    pwm_config cfg = pwm_get_default_config();
+    pwm_set_wrap(pwm_gpio_to_slice_num(gpio), 65535);
+    pwm_init(pwm_gpio_to_slice_num(gpio), &cfg, true);
+    gpio_set_function(gpio, GPIO_FUNC_PWM);
+  }
+
+  void InkyFrame::init() {
+    // keep the pico awake by holding vsys_en high
+    gpio_set_function(HOLD_VSYS_EN, GPIO_FUNC_SIO);
+    gpio_set_dir(HOLD_VSYS_EN, GPIO_OUT);
+    gpio_put(HOLD_VSYS_EN, true);
+
+    // setup the shift register
+    gpio_configure(SR_CLOCK, GPIO_OUT, true);
+    gpio_configure(SR_LATCH, GPIO_OUT, true);
+    gpio_configure(SR_OUT, GPIO_IN);
+
+    // determine wake up event
+    if(read_shift_register_bit(BUTTON_A)) {_wake_up_event = BUTTON_A_EVENT;}
+    if(read_shift_register_bit(BUTTON_B)) {_wake_up_event = BUTTON_B_EVENT;}
+    if(read_shift_register_bit(BUTTON_C)) {_wake_up_event = BUTTON_C_EVENT;}
+    if(read_shift_register_bit(BUTTON_D)) {_wake_up_event = BUTTON_D_EVENT;}
+    if(read_shift_register_bit(BUTTON_E)) {_wake_up_event = BUTTON_E_EVENT;}
+    if(read_shift_register_bit(RTC_ALARM)) {_wake_up_event = RTC_ALARM_EVENT;}
+    if(read_shift_register_bit(EXTERNAL_TRIGGER)) {_wake_up_event = EXTERNAL_TRIGGER_EVENT;}
+    // there are other reasons a wake event can occur: connect power via usb,
+    // connect a battery, or press the reset button. these cannot be
+    // disambiguated so we don't attempt to report them
+
+    // Disable display update busy wait, we'll handle it ourselves
+    inky73.set_blocking(false);
+
+    // initialise the rtc
+    rtc.init();
+
+    // setup led pwm
+    gpio_configure_pwm(LED_A);
+    gpio_configure_pwm(LED_B);
+    gpio_configure_pwm(LED_C);
+    gpio_configure_pwm(LED_D);
+    gpio_configure_pwm(LED_E);
+    gpio_configure_pwm(LED_ACTIVITY);
+    gpio_configure_pwm(LED_CONNECTION);
+  }
+
+  bool InkyFrame::is_busy() {
+    // check busy flag on shift register
+    bool busy = !read_shift_register_bit(Flags::EINK_BUSY);
+    return busy;
+  }
+
+  void InkyFrame::update(bool blocking) {
+    while(is_busy()) {
+      tight_loop_contents();
+    }
+    inky73.update((PicoGraphics_PenInky7 *)this);
+    while(is_busy()) {
+      tight_loop_contents();
+    }
+    inky73.power_off();
+  }
+
+  bool InkyFrame::pressed(Button button) {
+    return read_shift_register_bit(button);
+  }
+
+  // set the LED brightness by generating a gamma corrected target value for
+  // the 16-bit pwm channel. brightness values are from 0 to 100.
+  void InkyFrame::led(LED led, uint8_t brightness) {
+    uint16_t value =
+      (uint16_t)(pow((float)(brightness) / 100.0f, 2.8) * 65535.0f + 0.5f);
+    pwm_set_gpio_level(led, value);
+  }
+
+  uint8_t InkyFrame::read_shift_register() {
+    gpio_put(SR_LATCH, false); sleep_us(1);
+    gpio_put(SR_LATCH, true); sleep_us(1);
+
+    uint8_t result = 0;
+    uint8_t bits = 8;
+    while(bits--) {
+      result <<= 1;
+      result |= gpio_get(SR_OUT) ? 1 : 0;
+
+      gpio_put(SR_CLOCK, false); sleep_us(1);
+      gpio_put(SR_CLOCK, true); sleep_us(1);
+    }
+
+    return result;
+  }
+
+  bool InkyFrame::read_shift_register_bit(uint8_t index) {
+    return read_shift_register() & (1U << index);
+  }
+
+  void InkyFrame::sleep(int wake_in_minutes) {
+    if(wake_in_minutes != -1) {
+      // set an alarm to wake inky up in wake_in_minutes - the maximum sleep
+      // is 255 minutes or around 4.5 hours which is the longest timer the RTC
+      // supports, to sleep any longer we need to specify a date and time to
+      // wake up
+      rtc.set_timer(wake_in_minutes, PCF85063A::TIMER_TICK_1_OVER_60HZ);
+      rtc.enable_timer_interrupt(true, false);
+    }
+
+    // release the vsys hold pin so that inky can go to sleep
+    gpio_put(HOLD_VSYS_EN, false);
+    while(true){};
+  }
+
+  void InkyFrame::sleep_until(int second, int minute, int hour, int day) {
+    if(second != -1 || minute != -1 || hour != -1 || day != -1) {
+      // set an alarm to wake inky up at the specified time and day
+      rtc.set_alarm(second, minute, hour, day);
+      rtc.enable_alarm_interrupt(true);
+    }
+
+    // release the vsys hold pin so that inky can go to sleep
+    gpio_put(HOLD_VSYS_EN, false);
+  }
+
+  // Display a portion of an image (icon sheet) at dx, dy
+  void InkyFrame::icon(const uint8_t *data, int sheet_width, int icon_size, int index, int dx, int dy) {
+    image(data, sheet_width, icon_size * index, 0, icon_size, icon_size, dx, dy);
+  }
+
+  // Display an image that fills the screen (286*128)
+  void InkyFrame::image(const uint8_t* data) {
+    image(data, width, 0, 0, width, height, 0, 0);
+  }
+
+  // Display an image smaller than the screen (sw*sh) at dx, dy
+  void InkyFrame::image(const uint8_t *data, int w, int h, int x, int y) {
+    image(data, w, 0, 0, w, h, x, y);
+  }
+
+  void InkyFrame::image(const uint8_t *data, int stride, int sx, int sy, int dw, int dh, int dx, int dy) {
+    for(auto y = 0; y < dh; y++) {
+      for(auto x = 0; x < dw; x++) {
+
+        uint32_t o = ((y + sy) * (stride / 2)) + ((x + sx) / 2);
+        uint8_t  d = ((x + sx) & 0b1) ? data[o] >> 4 : data[o] & 0xf;
+
+        // draw the pixel
+        set_pen(d);
+        pixel({dx + x, dy + y});
+      }
+    }
+  }
+
+}