Merge pull request #16 from kienvo/power-off

Add entering power-off mode

src/main.c

@@ -87,6 +87,52 @@ void draw_testfb()
 	}
 }
 
+void poweroff()
+{
+	// Stop wasting energy
+	GPIOA_ModeCfg(GPIO_Pin_All, GPIO_ModeIN_Floating);
+	GPIOB_ModeCfg(GPIO_Pin_All, GPIO_ModeIN_Floating);
+
+	// Configure wake-up
+	GPIOA_ModeCfg(KEY1_PIN, GPIO_ModeIN_PD);
+	GPIOA_ITModeCfg(KEY1_PIN, GPIO_ITMode_RiseEdge);
+	PFIC_EnableIRQ(GPIO_A_IRQn);
+	PWR_PeriphWakeUpCfg(ENABLE, RB_SLP_GPIO_WAKE, Long_Delay);
+
+	/* Good bye */
+	LowPower_Shutdown(0);
+}
+
+void handle_mode_transition()
+{
+	static int prev_mode;
+	if (prev_mode == mode) return;
+
+	switch (mode)
+	{
+	case DOWNLOAD:
+		// Disable fb transition while in download mode
+		btn_onOnePress(KEY2, NULL);
+
+		// Take control of the current fb to display 
+		// the Bluetooth animation
+		while (mode == DOWNLOAD) {
+			/* Animation and Bluetooth will be placed here */
+		}
+		// If not being flashed, pressing KEY1 again will 
+		// make the badge goes off:
+		
+		// fallthrough
+	case POWER_OFF:
+		poweroff();
+		break;
+	
+	default:
+		break;
+	}
+	prev_mode = mode;
+}
+
 int main()
 {
 	SetSysClock(CLK_SOURCE_PLL_60MHz);
@@ -114,6 +160,7 @@ int main()
 			}
 			DelayMs(200);
 		}
+		handle_mode_transition();
     }
 }