Fix explorer micropython lib (#21)

* fixed explorer library, added to cmake, and added quick demo

* display status of motors during demo

* increase motor power in demo

Co-authored-by: Jonathan Williamson <jon@pimoroni.com>

micropython/examples/pico_explorer/demo.py

@@ -0,0 +1,62 @@
+import time, random
+import picoexplorer as explorer
+
+width = explorer.get_width()
+height = explorer.get_height()
+
+display_buffer = bytearray(width * height * 2)  # 2-bytes per pixel (RGB565)
+explorer.init(display_buffer)
+
+explorer.set_backlight(1.0)
+explorer.set_audio_pin(0)
+
+i = 1
+
+while True:
+    explorer.set_pen(120, 40, 60)    
+    explorer.clear()
+    
+    adc0 = int(explorer.get_adc(0) * 120)
+    adc1 = int(explorer.get_adc(1) * 120)
+    adc2 = int(explorer.get_adc(2) * 120)
+    
+    explorer.set_pen(255, 255, 255)
+
+    explorer.text("ADC0:", 20, 20, 100)    
+    explorer.text("ADC1:", 20, 40, 100)    
+    explorer.text("ADC2:", 20, 60, 100)    
+
+    explorer.set_pen(adc0 * 2, 0, 0) 
+    explorer.circle(90 + adc0, 26, 10)
+    
+    explorer.set_pen(0, adc1 * 2, 0) 
+    explorer.circle(90 + adc1, 46, 10)
+
+    explorer.set_pen(0, 0, adc2 * 2) 
+    explorer.circle(90 + adc2, 66, 10)
+
+    explorer.set_pen(255, 255, 255)
+    explorer.text("Plug a jumper wire from GP0 to AUDIO to hear noise!", 20, 110, 200)    
+
+    explorer.set_tone(i)
+
+    if i > 600:        
+        explorer.text("Motor 1: Forwards", 20, 180, 200)    
+        explorer.set_motor(0, 0, 1)
+    else:
+        explorer.text("Motor 1: Backwards", 20, 180, 200)    
+        explorer.set_motor(0, 1, 1)
+    
+    if i > 600:
+        explorer.text("Motor 2: Forwards", 20, 200, 200)    
+        explorer.set_motor(1, 0, 1)
+    else:
+        explorer.text("Motor 2: Backwards", 20, 200, 200)    
+        explorer.set_motor(1, 1, 1)
+
+    i = i + 20
+    if i > 1000:
+        i = 1
+        
+    explorer.update()
+    time.sleep(0.01)

micropython/modules/pico_explorer/pico_explorer.cpp

@@ -85,7 +85,7 @@ extern mp_obj_t picoexplorer_get_adc(mp_obj_t channel_obj) {
         mp_raise_ValueError("adc channel not valid. Expected 0 to 2");
     else
         reading = explorer->get_adc(channel);
-    
+
     return mp_obj_new_float(reading);
 }
 
@@ -180,7 +180,7 @@ mp_obj_t picoexplorer_create_pen(mp_obj_t r_obj, mp_obj_t g_obj, mp_obj_t b_obj)
         mp_raise_ValueError("b out of range. Expected 0 to 255");
     else
         pen = explorer->create_pen(r, g, b);
-    
+
     return mp_obj_new_int(pen);
 }
 
@@ -192,7 +192,7 @@ mp_obj_t picoexplorer_set_clip(mp_uint_t n_args, const mp_obj_t *args) {
     int w = mp_obj_get_int(args[2]);
     int h = mp_obj_get_int(args[3]);
 
-    rect r(x, y, w, h);
+    Rect r(x, y, w, h);
     explorer->set_clip(r);
 
     return mp_const_none;
@@ -212,9 +212,9 @@ mp_obj_t picoexplorer_pixel(mp_obj_t x_obj, mp_obj_t y_obj) {
     int x = mp_obj_get_int(x_obj);
     int y = mp_obj_get_int(y_obj);
 
-    point p(x, y);
+    Point p(x, y);
     explorer->pixel(p);
- 
+
     return mp_const_none;
 }
 
@@ -223,7 +223,7 @@ mp_obj_t picoexplorer_pixel_span(mp_obj_t x_obj, mp_obj_t y_obj, mp_obj_t l_obj)
     int y = mp_obj_get_int(y_obj);
     int l = mp_obj_get_int(l_obj);
 
-    point p(x, y);
+    Point p(x, y);
     explorer->pixel_span(p, l);
 
     return mp_const_none;
@@ -237,7 +237,7 @@ mp_obj_t picoexplorer_rectangle(mp_uint_t n_args, const mp_obj_t *args) {
     int w = mp_obj_get_int(args[2]);
     int h = mp_obj_get_int(args[3]);
 
-    rect r(x, y, w, h);
+    Rect r(x, y, w, h);
     explorer->rectangle(r);
 
     return mp_const_none;
@@ -248,7 +248,7 @@ mp_obj_t picoexplorer_circle(mp_obj_t x_obj, mp_obj_t y_obj, mp_obj_t r_obj) {
     int y = mp_obj_get_int(y_obj);
     int r = mp_obj_get_int(r_obj);
 
-    point p(x, y);
+    Point p(x, y);
     explorer->circle(p, r);
 
     return mp_const_none;
@@ -259,7 +259,7 @@ mp_obj_t picoexplorer_character(mp_uint_t n_args, const mp_obj_t *args) {
     int x = mp_obj_get_int(args[1]);
     int y = mp_obj_get_int(args[2]);
 
-    point p(x, y);
+    Point p(x, y);
     if(n_args == 4) {
         int scale = mp_obj_get_int(args[3]);
         explorer->character((char)c, p, scale);
@@ -280,7 +280,7 @@ mp_obj_t picoexplorer_text(mp_uint_t n_args, const mp_obj_t *args) {
     int y = mp_obj_get_int(args[2]);
     int wrap = mp_obj_get_int(args[3]);
 
-    point p(x, y);
+    Point p(x, y);
     if(n_args == 5) {
         int scale = mp_obj_get_int(args[4]);
         explorer->text(t, p, wrap, scale);

micropython/modules/usermod.cmake

@@ -1,4 +1,5 @@
 include(${CMAKE_CURRENT_LIST_DIR}/pico_scroll/usermod.cmake)
 include(${CMAKE_CURRENT_LIST_DIR}/pico_rgb_keypad/usermod.cmake)
 include(${CMAKE_CURRENT_LIST_DIR}/pico_unicorn/usermod.cmake)
-include(${CMAKE_CURRENT_LIST_DIR}/pico_display/usermod.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/pico_display/usermod.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/pico_explorer/usermod.cmake)