feat(core): expose display pixeldata accessors from C

core/embed/extmod/modtrezorui/display-stm32_T.h

@@ -30,11 +30,14 @@ const volatile uint8_t DISPLAY_ST7789V_INVERT_COLORS = 0;
 #define DISPLAY_MEMORY_BASE 0x60000000
 #define DISPLAY_MEMORY_PIN 16
 
-#define CMD(X) (*((__IO uint8_t *)((uint32_t)(DISPLAY_MEMORY_BASE))) = (X))
-#define ADDR                                           \
-  (*((__IO uint8_t *)((uint32_t)(DISPLAY_MEMORY_BASE | \
-                                 (1 << DISPLAY_MEMORY_PIN)))))
-#define DATA(X) (ADDR) = (X)
+__IO uint8_t *const DISPLAY_CMD_ADDRESS =
+    (__IO uint8_t *const)((uint32_t)DISPLAY_MEMORY_BASE);
+__IO uint8_t *const DISPLAY_DATA_ADDRESS =
+    (__IO uint8_t *const)((uint32_t)DISPLAY_MEMORY_BASE |
+                          (1 << DISPLAY_MEMORY_PIN));
+
+#define CMD(X) (*DISPLAY_CMD_ADDRESS = (X))
+#define DATA(X) (*DISPLAY_DATA_ADDRESS = (X))
 #define PIXELDATA(X) \
   DATA((X) >> 8);    \
   DATA((X)&0xFF)
@@ -62,12 +65,13 @@ static uint32_t read_display_id(uint8_t command) {
   volatile uint8_t c = 0;
   uint32_t id = 0;
   CMD(command);
-  c = ADDR;  // first returned value is a dummy value and should be discarded
-  c = ADDR;
+  c = *DISPLAY_DATA_ADDRESS;  // first returned value is a dummy value and
+                              // should be discarded
+  c = *DISPLAY_DATA_ADDRESS;
   id |= (c << 16);
-  c = ADDR;
+  c = *DISPLAY_DATA_ADDRESS;
   id |= (c << 8);
-  c = ADDR;
+  c = *DISPLAY_DATA_ADDRESS;
   id |= c;
   return id;
 }

core/embed/extmod/modtrezorui/display.h

@@ -140,4 +140,14 @@ void display_fade(int start, int end, int delay);
 void display_utf8_substr(const char *buf_start, size_t buf_len, int char_off,
                          int char_len, const char **out_start, int *out_len);
 
+// pixeldata accessors
+void display_set_window(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1);
+void display_pixeldata(uint16_t c);
+void display_pixeldata_dirty();
+
+#if !(defined EMULATOR) && (defined TREZOR_MODEL_T)
+extern volatile uint8_t *const DISPLAY_CMD_ADDRESS;
+extern volatile uint8_t *const DISPLAY_DATA_ADDRESS;
+#endif
+
 #endif