From 1fc98118dec2061537651bd7eccdbf344427c0c0 Mon Sep 17 00:00:00 2001
From: radex <radex@hackerspace.pl>
Date: Sat, 25 May 2024 12:06:50 +0200
Subject: [PATCH] audio AND video? no way!

---
 firmware/scripts/audio_convert.py |  2 +-
 firmware/src/audio.h              |  4 ++--
 firmware/src/leds.cpp             |  4 +++-
 firmware/src/main.cpp             | 24 ++++++++++++------------
 firmware/src/sd.cpp               |  2 +-
 5 files changed, 19 insertions(+), 17 deletions(-)

diff --git a/firmware/scripts/audio_convert.py b/firmware/scripts/audio_convert.py
index 9a29b50..429e14d 100644
--- a/firmware/scripts/audio_convert.py
+++ b/firmware/scripts/audio_convert.py
@@ -16,7 +16,7 @@ if len(data_in.shape)>1:
 print("resampling...")
 
 converter = 'sinc_best'  # or 'sinc_fastest', ...
-desired_sample_rate = 44000.0
+desired_sample_rate = 22000.0
 ratio = desired_sample_rate/datasamplerate
 data_out = samplerate.resample(data_in, ratio, converter)
 
diff --git a/firmware/src/audio.h b/firmware/src/audio.h
index 2c9b69a..b19a60d 100644
--- a/firmware/src/audio.h
+++ b/firmware/src/audio.h
@@ -5,8 +5,8 @@
 
 #define AUDIO_PIN 2
 
-#define AUDIO_RATE 44000.0f
-#define BUFFER_LEN 512*32
+#define AUDIO_RATE 22000.0f
+#define BUFFER_LEN 512*2
 #define BUFFER_LEN_MS (BUFFER_LEN / AUDIO_RATE) * 1000.0f
 
 extern uint8_t wav_buffer_0[BUFFER_LEN];
diff --git a/firmware/src/leds.cpp b/firmware/src/leds.cpp
index 9230cc4..5a50ba5 100644
--- a/firmware/src/leds.cpp
+++ b/firmware/src/leds.cpp
@@ -16,6 +16,8 @@ inline void pulsePin(uint8_t pin) {
    // there are glitches without this (maybe just due to breadboard...)
   _NOP();
   _NOP();
+  _NOP();
+    // busy_wait_us_32(50);
   gpio_put(pin, LOW);
 }
 
@@ -199,7 +201,7 @@ void leds_initPusher() {
   uint latchPin = COL_SRCLK;
 
   pio_sm_config config = leds_px_pusher_program_get_default_config(offset);
-  sm_config_set_clkdiv_int_frac(&config, 1, 0);
+  sm_config_set_clkdiv_int_frac(&config, 2, 0);
 
   // Shift OSR to the right, autopull
   sm_config_set_out_shift(&config, true, true, 32);
diff --git a/firmware/src/main.cpp b/firmware/src/main.cpp
index 1b5249a..a9c7e24 100644
--- a/firmware/src/main.cpp
+++ b/firmware/src/main.cpp
@@ -44,18 +44,18 @@ void loop() {
     sd_loadNextAudio();
   }
 
-  if (Serial.available() > 0) {
-    char c = Serial.read();
-    if (c == 'p') {
-      Serial.println("Paused. Press any key to continue.");
-      leds_disable();
-      while (Serial.available() == 0) {
-        Serial.read();
-        delay(50);
-      }
-      Serial.println("Continuing...");
-    }
-  }
+  // if (Serial.available() > 0) {
+  //   char c = Serial.read();
+  //   if (c == 'p') {
+  //     Serial.println("Paused. Press any key to continue.");
+  //     leds_disable();
+  //     while (Serial.available() == 0) {
+  //       Serial.read();
+  //       delay(50);
+  //     }
+  //     Serial.println("Continuing...");
+  //   }
+  // }
 
   if (!gfx_decoder_handleLoop()) {
     Serial.println("Failed to load frame...");
diff --git a/firmware/src/sd.cpp b/firmware/src/sd.cpp
index 782c1f0..a05b2c9 100644
--- a/firmware/src/sd.cpp
+++ b/firmware/src/sd.cpp
@@ -44,7 +44,7 @@ void setupSD() {
 
   // printSDConfig();
 
-  if (!SD.begin(5000000, PIN_SPI_SS)) {
+  if (!SD.begin(20000000, PIN_SPI_SS)) {
     Serial.println("SD Initialization failed!");
     // Serial.print("Error code: ");
     // Serial.println(SD.card.errorCode(), HEX);