Prevent device from sleep mode while setuping display (#366)

applications/gui/canvas.c

@@ -2,6 +2,7 @@
 #include "icon_i.h"
 
 #include <furi.h>
+#include <api-hal.h>
 
 uint8_t u8g2_gpio_and_delay_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr);
 uint8_t u8x8_hw_spi_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_ptr);
@@ -9,6 +10,8 @@ uint8_t u8x8_hw_spi_stm32(u8x8_t* u8x8, uint8_t msg, uint8_t arg_int, void* arg_
 Canvas* canvas_init() {
     Canvas* canvas = furi_alloc(sizeof(Canvas));
 
+    api_hal_power_insomnia_enter();
+
     u8g2_Setup_st7565_erc12864_alt_f(
         &canvas->fb, U8G2_R0, u8x8_hw_spi_stm32, u8g2_gpio_and_delay_stm32);
 
@@ -19,6 +22,8 @@ Canvas* canvas_init() {
     u8g2_SetPowerSave(&canvas->fb, 0);
     u8g2_SendBuffer(&canvas->fb);
 
+    api_hal_power_insomnia_exit();
+
     return canvas;
 }