+ struct ao_adc packet;
+ int16_t decivolt;
+
+ ao_adc_single_get(&packet);
+ decivolt = ao_battery_decivolt(packet.v_batt);
+ _ao_lco_show_voltage((uint16_t) decivolt, "LCO battery");
+ ao_st7565_update(&fb);
+}
+
+static void
+_ao_lco_show_contrast(void)
+{
+ uint8_t brightness = ao_st7565_get_brightness();
+ int16_t contrast = (int16_t) (brightness * CONTRAST_WIDTH / AO_LCO_MAX_CONTRAST);
+
+ ao_text(&fb, &SMALL_FONT, CONTRAST_LABEL_X, LABEL_Y, "Contrast", AO_BLACK, AO_COPY);
+ ao_rect(&fb, CONTRAST_X, CONTRAST_Y, contrast, CONTRAST_HEIGHT, AO_BLACK, AO_COPY);
+}
+
+static void
+_ao_lco_show_backlight(void)
+{
+ int32_t backlight = ao_lco_get_backlight();
+ int16_t value = (int16_t) (backlight * BACKLIGHT_WIDTH / AO_LCO_MAX_BACKLIGHT);
+
+ ao_text(&fb, &SMALL_FONT, BACKLIGHT_LABEL_X, LABEL_Y, "Backlight", AO_BLACK, AO_COPY);
+ ao_rect(&fb, BACKLIGHT_X, BACKLIGHT_Y, value, BACKLIGHT_HEIGHT, AO_BLACK, AO_COPY);
+}
+
+static int16_t info_y;
+
+static void
+_ao_lco_info(const char *format, ...)
+{
+ va_list a;
+ char buf[20];
+ va_start(a, format);
+ vsnprintf(buf, sizeof(buf), format, a);
+ va_end(a);
+ ao_text(&fb, &SMALL_FONT, 0, info_y, buf, AO_BLACK, AO_COPY);
+ info_y += INFO_STEP_Y;
+}
+
+static void
+_ao_lco_show_info(void)
+{
+ info_y = INFO_START_Y;
+ _ao_lco_info("%s", ao_product);
+ _ao_lco_info("Version: %s", ao_version);
+ _ao_lco_info("Serial: %d", ao_serial_number);
+ _ao_lco_info("Callsign: %s", ao_config.callsign);
+ _ao_lco_info("Frequency: %ld.%03d",
+ ao_config.frequency / 1000,
+ (int) (ao_config.frequency % 1000));