From 89287ab0cdf069b49d7f576df65902cf7699e960 Mon Sep 17 00:00:00 2001
From: Brad Barnett <127794626+bdbarnett@users.noreply.github.com>
Date: Sat, 7 Nov 2026 05:29:14 -0600
Subject: [PATCH 1/2] Spectrum: the pump's levels run on CPython too

pump_levels took ticks_ms from time, which only MicroPython has, so the
MP3 player's spectrum failed to start on a computer. It now uses multimer,
as the rest of the apps do.
---
 lib/spectrum/pump_levels.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/spectrum/pump_levels.py b/lib/spectrum/pump_levels.py
index cc4bce5..51d09ad 100644
--- a/lib/spectrum/pump_levels.py
+++ b/lib/spectrum/pump_levels.py
@@ -22,7 +22,7 @@
 has far less energy up there than a bar chart would like.
 """
 
-from time import ticks_diff, ticks_ms
+from multimer import ticks_diff, ticks_ms
 
 import audiometer
 

From 86418407dc845aa166a976943828b4469c463c40 Mon Sep 17 00:00:00 2001
From: Brad Barnett <127794626+bdbarnett@users.noreply.github.com>
Date: Sat, 7 Nov 2026 05:46:34 -0600
Subject: [PATCH 2/2] Spectrum: present a desktop window after each frame

An app that leaves presenting to LVGL (touchkit's quiet_app_timers) stops
appdev's refresh, so on a desktop window the bars reached the screen only
when LVGL next drew something, about once a second. A display that needs
presenting and has no row refresh is now shown after each frame.
---
 lib/spectrum/analyzer.py | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/spectrum/analyzer.py b/lib/spectrum/analyzer.py
index 27cf457..21bace0 100644
--- a/lib/spectrum/analyzer.py
+++ b/lib/spectrum/analyzer.py
@@ -115,6 +115,11 @@ def __init__(self, display_drv, source, *, bands=None, height=None, y=None, x=0,
         self.present_rows = bool(getattr(display_drv, "needs_refresh", False)) and hasattr(
             getattr(display_drv, "_raw_buffer", None), "refresh_rect"
         )
+        # Any other display that needs presenting (a desktop window) is shown
+        # whole after each frame: an app that leaves presenting to LVGL has
+        # stopped appdev's refresh, so the bars would show only when LVGL
+        # next drew something.
+        self.present_all = bool(getattr(display_drv, "needs_refresh", False)) and not self.present_rows
         self._send = self._panel_blit()
         self._dirty = [0, 0]  # rows touched this frame, top and bottom
         self._stats = [0, 0, 0, 0, 0]  # frames, data us, update us, draw us, report start
@@ -187,8 +192,11 @@ def tick(self, _=None):
         dirty = self._dirty
         dirty[0], dirty[1] = self.y + view.height, 0
         view.render_columns(self._blit)
-        if self.present_rows and dirty[1] > dirty[0]:
-            self.display_drv.flush_rect(self.x, dirty[0], view.width, dirty[1] - dirty[0])
+        if dirty[1] > dirty[0]:
+            if self.present_rows:
+                self.display_drv.flush_rect(self.x, dirty[0], view.width, dirty[1] - dirty[0])
+            elif self.present_all:
+                self.display_drv.show()
         if not self.report:
             return
         d = ticks_us()