LED control

drivers/dv_display/dv_display.cpp

@@ -96,6 +96,14 @@ namespace pimoroni {
     return i2c.reg_read_uint8(I2C_ADDR, I2C_REG_GPIO_HI);
   }
 
+  void DVDisplay::set_led_level(uint8_t level) {
+    i2c.reg_write_uint8(I2C_ADDR, I2C_REG_LED, level | 0x80);
+  }
+
+  void DVDisplay::set_led_heartbeat() {
+    i2c.reg_write_uint8(I2C_ADDR, I2C_REG_LED, 2);
+  }
+
   void DVDisplay::get_edid(uint8_t* edid) {
     i2c.read_bytes(I2C_ADDR, I2C_REG_EDID, edid, 128);
   }

drivers/dv_display/dv_display.hpp

@@ -39,6 +39,7 @@ namespace pimoroni {
     static constexpr uint I2C_REG_SET_RES = 0xF8;
     static constexpr uint I2C_REG_START = 0xF9;
     static constexpr uint I2C_REG_GPIO = 0xC0;
+    static constexpr uint I2C_REG_LED = 0xC1;
     static constexpr uint I2C_REG_GPIO_HI = 0xC8;
     static constexpr uint I2C_REG_EDID = 0xED;
     
@@ -109,6 +110,11 @@ namespace pimoroni {
       bool is_button_b_pressed() { return (get_driver_gpio() & 0x1) != 0x1; }
       bool is_button_c_pressed() { return (get_driver_gpio() & 0x2) != 0x2; }
 
+      // Valid LED levels are from 0-127.
+      void set_led_level(uint8_t level);
+      void set_led_level(float level) { set_led_level((uint8_t)(level * 127.f)); }
+      void set_led_heartbeat();
+
       // The supplied buffer must be at least 128 bytes long
       void get_edid(uint8_t* edid);
 

examples/dv_stick/dv_stick_test.cpp

@@ -45,6 +45,17 @@ int main() {
   display.init();
   //display.test();
 
+#if 0
+  uint8_t edid[128];
+  display.get_edid(edid);
+  for (int i = 0; i < 8; ++i) {
+      for (int j = 0; j < 16; ++j) {
+          printf("%02x ", edid[i*16 + j]);
+      }
+      printf("\n");
+  }
+#endif
+
   PicoGraphics_PenDV_RGB555 graphics(FRAME_WIDTH, FRAME_HEIGHT, display);
 
   graphics.set_pen(0x001F);
@@ -71,6 +82,7 @@ int main() {
     circles[i].y = rand() % graphics.bounds.h;
   }
 
+  int frames = 0;
   while (true) {
     //while(gpio_get(BUTTON_A) == 1) {
     //  sleep_ms(10);
@@ -139,5 +151,9 @@ int main() {
     display.flip();
     uint32_t flip_time = time_us_32() - flip_start_time;
     printf("Render: %.3f, flip: %.3f\n", render_time / 1000.f, flip_time / 1000.f);
+
+    ++frames;
+    if (gpio_get(BUTTON_A) == 0) display.set_led_level((uint8_t)frames);
+    else display.set_led_heartbeat();
   }
 }