epicardium: BLE opt in

epicardium/main.c

@@ -30,6 +30,43 @@ TaskHandle_t dispatcher_task_id;
 
 void vBleTask(void *pvParameters);
 
+#define BLEMAXCFGBYTES 100
+int bleShallStart(void)
+{
+	int bleConfigFile = epic_file_open("ble.txt", "r");
+	if (bleConfigFile < 0) {
+		LOG_INFO("startup", "can not open ble.txt -> BLE is not started");
+		epic_file_close(bleConfigFile);
+		return 0;
+	}
+
+	char cfgBuf[BLEMAXCFGBYTES+1];
+	int readNum = epic_file_read(bleConfigFile, cfgBuf, BLEMAXCFGBYTES);
+	LOG_INFO("startup", "readNum %i", readNum);
+	if (readNum < 0) {
+		LOG_INFO("startup", "can not read ble.txt -> BLE is not started");
+		epic_file_close(bleConfigFile);
+		return 0;
+	}
+	cfgBuf[readNum] = '\0';
+
+	LOG_INFO("startup", "faa %s", cfgBuf);
+
+	char bleActiveStr[] = "active=true";
+	cfgBuf[sizeof(bleActiveStr)-1] = '\0';
+	LOG_INFO("startup", "foe %i %s", sizeof(bleActiveStr), cfgBuf);
+
+	if (strcmp(cfgBuf, "active=true") != 0) {
+		LOG_INFO("startup", "ble.txt is not \"active=true\" -> BLE is not started");
+		epic_file_close(bleConfigFile);
+		return 0;
+	}
+
+	LOG_INFO("startup", "ble.txt is \"active=true\" -> BLE is starting");
+	epic_file_close(bleConfigFile);
+	return 1;
+}
+
 int main(void)
 {
 	LOG_INFO("startup", "Epicardium startup ...");
@@ -118,6 +155,7 @@ int main(void)
 	}
 
 	/* BLE */
+	if (bleShallStart()) {
 		if (xTaskCreate(
 			    vBleTask,
 			    (const char *)"BLE",
@@ -128,6 +166,7 @@ int main(void)
 			LOG_CRIT("startup", "Failed to create %s task!", "BLE");
 			abort();
 		}
+	}
 
 	/* light sensor */
 	LOG_INFO("startup", "starting light sensor ...");

preload/bleoptin.py

+import ujson
+import os
+import display
+import utime
+import buttons
+
+CONFIG_NAME = "ble.txt"
+ACTIVE_STRING = "active=true"
+INACTIVE_STRING = "active=false"
+
+
+def init():
+    if CONFIG_NAME not in os.listdir("."):
+        deactivate()
+
+
+def triangle(disp, x, y, left):
+    yf = 1 if left else -1
+    scale = 6
+    disp.line(x - scale * yf, int(y + scale / 2), x, y)
+    disp.line(x, y, x, y + scale)
+    disp.line(x, y + scale, x - scale * yf, y + int(scale / 2))
+
+
+def activate():
+    with open(CONFIG_NAME, 'w') as f:
+        f.write("active=true")
+    
+
+def deactivate():
+    with open(CONFIG_NAME, 'w') as f:
+        f.write("active=false")
+    
+
+def is_active():
+    with open(CONFIG_NAME, 'r') as f:
+        state = f.readlines()[0]
+        if len(state) < len(ACTIVE_STRING):
+            return False
+        state = state[0:len(ACTIVE_STRING)]
+        print(state)
+        return state == ACTIVE_STRING
+    
+
+def headline():
+    disp.print("BLE", posy=0, fg=[0, 255, 255])
+    if is_active():
+        disp.print("active", posy=20, fg=[0, 255, 255])
+    else:
+        disp.print("inactive", posy=20, fg=[0, 255, 255])
+
+
+def selector():
+    triangle(disp, 10, 46, True)
+    triangle(disp, 150, 66, False)
+    disp.print("activate", posx=15, posy=40, fg=[0, 255, 0])
+    disp.print("deactivate", posx=5, posy=60, fg=[255, 0, 0])
+
+
+disp = display.open()
+print("HALLO")
+button_pressed = False
+init()
+
+while True:
+    disp.clear()
+    headline()
+    v = buttons.read(buttons.BOTTOM_LEFT | buttons.BOTTOM_RIGHT)
+    if v == 0:
+        button_pressed = False
+
+    if not button_pressed and v & buttons.BOTTOM_LEFT != 0:
+        button_pressed = True
+        activate()
+    elif not button_pressed and v & buttons.BOTTOM_RIGHT != 0:
+        button_pressed = True
+        deactivate()
+    
+    selector()
+    disp.update()
+    utime.sleep(0.1)
+