Remove sysex API (#14723)

14 files changed, 7 insertions, 425 deletions

diff --git a/common_features.mk b/common_features.mk
index d7b0f826a..e3b42a961 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -46,14 +46,6 @@ else ifeq ($(strip $(DEBUG_MATRIX_SCAN_RATE_ENABLE)), api)
     OPT_DEFS += -DDEBUG_MATRIX_SCAN_RATE
 endif
 
-ifeq ($(strip $(API_SYSEX_ENABLE)), yes)
-    OPT_DEFS += -DAPI_SYSEX_ENABLE
-    OPT_DEFS += -DAPI_ENABLE
-    MIDI_ENABLE=yes
-    SRC += $(QUANTUM_DIR)/api/api_sysex.c
-    SRC += $(QUANTUM_DIR)/api.c
-endif
-
 ifeq ($(strip $(COMMAND_ENABLE)), yes)
     SRC += $(QUANTUM_DIR)/command.c
     OPT_DEFS += -DCOMMAND_ENABLE
diff --git a/docs/faq_misc.md b/docs/faq_misc.md
index 9ab2b69a8..41d17906b 100644
--- a/docs/faq_misc.md
+++ b/docs/faq_misc.md
@@ -36,7 +36,7 @@ Size after:
     can retry, loading that one
   - Some of the options you might specify in your keyboard's Makefile
     consume extra memory; watch out for BOOTMAGIC_ENABLE,
-    MOUSEKEY_ENABLE, EXTRAKEY_ENABLE, CONSOLE_ENABLE, API_SYSEX_ENABLE
+    MOUSEKEY_ENABLE, EXTRAKEY_ENABLE, CONSOLE_ENABLE
 - DFU tools do /not/ allow you to write into the bootloader (unless
   you throw in an extra fruit salad of options), so there is little risk
   there.
diff --git a/docs/getting_started_make_guide.md b/docs/getting_started_make_guide.md
index 70390a510..deef7520e 100644
--- a/docs/getting_started_make_guide.md
+++ b/docs/getting_started_make_guide.md
@@ -125,10 +125,6 @@ This allows you output audio on the C6 pin (needs abstracting). See the [audio p
 
 Use this to debug changes to variable values, see the [tracing variables](unit_testing.md#tracing-variables) section of the Unit Testing page for more information.
 
-`API_SYSEX_ENABLE`
-
-This enables using the Quantum SYSEX API to send strings (somewhere?)
-
 `KEY_LOCK_ENABLE`
 
 This enables [key lock](feature_key_lock.md).
diff --git a/layouts/community/ergodox/jackhumbert/keymap.c b/layouts/community/ergodox/jackhumbert/keymap.c
index 745d632d0..9d357881e 100644
--- a/layouts/community/ergodox/jackhumbert/keymap.c
+++ b/layouts/community/ergodox/jackhumbert/keymap.c
@@ -85,11 +85,6 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
           eeconfig_init();
         }
         break;
-        case 2:
-        if (record->event.pressed) { // For resetting EEPROM
-          api_send_unicode(0x0CA0);
-        }
-        break;
       }
     return MACRO_NONE;
 };
diff --git a/quantum/api.c b/quantum/api.c
deleted file mode 100644
index 168574458..000000000
--- a/quantum/api.c
+++ /dev/null
@@ -1,182 +0,0 @@
-/* Copyright 2016 Jack Humbert
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "api.h"
-#include "quantum.h"
-
-void dword_to_bytes(uint32_t dword, uint8_t* bytes) {
-    bytes[0] = (dword >> 24) & 0xFF;
-    bytes[1] = (dword >> 16) & 0xFF;
-    bytes[2] = (dword >> 8) & 0xFF;
-    bytes[3] = (dword >> 0) & 0xFF;
-}
-
-uint32_t bytes_to_dword(uint8_t* bytes, uint8_t index) { return ((uint32_t)bytes[index + 0] << 24) | ((uint32_t)bytes[index + 1] << 16) | ((uint32_t)bytes[index + 2] << 8) | (uint32_t)bytes[index + 3]; }
-
-__attribute__((weak)) bool process_api_quantum(uint8_t length, uint8_t* data) { return process_api_keyboard(length, data); }
-
-__attribute__((weak)) bool process_api_keyboard(uint8_t length, uint8_t* data) { return process_api_user(length, data); }
-
-__attribute__((weak)) bool process_api_user(uint8_t length, uint8_t* data) { return true; }
-
-void process_api(uint16_t length, uint8_t* data) {
-    // SEND_STRING("\nRX: ");
-    // for (uint8_t i = 0; i < length; i++) {
-    //     send_byte(data[i]);
-    //     SEND_STRING(" ");
-    // }
-    if (!process_api_quantum(length, data)) return;
-
-    switch (data[0]) {
-        case MT_SET_DATA:
-            switch (data[1]) {
-                case DT_DEFAULT_LAYER: {
-                    eeconfig_update_default_layer(data[2]);
-                    default_layer_set((uint32_t)(data[2]));
-                    break;
-                }
-                case DT_KEYMAP_OPTIONS: {
-                    eeconfig_update_keymap(data[2]);
-                    break;
-                }
-                case DT_RGBLIGHT: {
-#ifdef RGBLIGHT_ENABLE
-                    uint32_t rgblight = bytes_to_dword(data, 2);
-                    eeconfig_update_rgblight(rgblight);
-#endif
-                    break;
-                }
-            }
-        case MT_GET_DATA:
-            switch (data[1]) {
-                case DT_HANDSHAKE: {
-                    MT_GET_DATA_ACK(DT_HANDSHAKE, NULL, 0);
-                    break;
-                }
-                case DT_DEBUG: {
-                    uint8_t debug_bytes[1] = {eeprom_read_byte(EECONFIG_DEBUG)};
-                    MT_GET_DATA_ACK(DT_DEBUG, debug_bytes, 1);
-                    break;
-                }
-                case DT_DEFAULT_LAYER: {
-                    uint8_t default_bytes[1] = {eeprom_read_byte(EECONFIG_DEFAULT_LAYER)};
-                    MT_GET_DATA_ACK(DT_DEFAULT_LAYER, default_bytes, 1);
-                    break;
-                }
-                case DT_CURRENT_LAYER: {
-                    uint8_t layer_state_bytes[4];
-                    dword_to_bytes(layer_state, layer_state_bytes);
-                    MT_GET_DATA_ACK(DT_CURRENT_LAYER, layer_state_bytes, 4);
-                    break;
-                }
-                case DT_AUDIO: {
-#ifdef AUDIO_ENABLE
-                    uint8_t audio_bytes[1] = {eeprom_read_byte(EECONFIG_AUDIO)};
-                    MT_GET_DATA_ACK(DT_AUDIO, audio_bytes, 1);
-#else
-                    MT_GET_DATA_ACK(DT_AUDIO, NULL, 0);
-#endif
-                    break;
-                }
-                case DT_BACKLIGHT: {
-#ifdef BACKLIGHT_ENABLE
-                    uint8_t backlight_bytes[1] = {eeprom_read_byte(EECONFIG_BACKLIGHT)};
-                    MT_GET_DATA_ACK(DT_BACKLIGHT, backlight_bytes, 1);
-#else
-                    MT_GET_DATA_ACK(DT_BACKLIGHT, NULL, 0);
-#endif
-                    break;
-                }
-                case DT_RGBLIGHT: {
-#ifdef RGBLIGHT_ENABLE
-                    uint8_t rgblight_bytes[4];
-                    dword_to_bytes(eeconfig_read_rgblight(), rgblight_bytes);
-                    MT_GET_DATA_ACK(DT_RGBLIGHT, rgblight_bytes, 4);
-#else
-                    MT_GET_DATA_ACK(DT_RGBLIGHT, NULL, 0);
-#endif
-                    break;
-                }
-                case DT_KEYMAP_OPTIONS: {
-                    uint8_t keymap_bytes[1] = {eeconfig_read_keymap()};
-                    MT_GET_DATA_ACK(DT_KEYMAP_OPTIONS, keymap_bytes, 1);
-                    break;
-                }
-                case DT_KEYMAP_SIZE: {
-                    uint8_t keymap_size[2] = {MATRIX_ROWS, MATRIX_COLS};
-                    MT_GET_DATA_ACK(DT_KEYMAP_SIZE, keymap_size, 2);
-                    break;
-                }
-                // This may be too much
-                // case DT_KEYMAP: {
-                //     uint8_t keymap_data[MATRIX_ROWS * MATRIX_COLS * 4 + 3];
-                //     keymap_data[0] = data[2];
-                //     keymap_data[1] = MATRIX_ROWS;
-                //     keymap_data[2] = MATRIX_COLS;
-                //     for (int i = 0; i < MATRIX_ROWS; i++) {
-                //         for (int j = 0; j < MATRIX_COLS; j++) {
-                //             keymap_data[3 + (i*MATRIX_COLS*2) + (j*2)] = pgm_read_word(&keymaps[data[2]][i][j]) >> 8;
-                //             keymap_data[3 + (i*MATRIX_COLS*2) + (j*2) + 1] = pgm_read_word(&keymaps[data[2]][i][j]) & 0xFF;
-                //         }
-                //     }
-                //     MT_GET_DATA_ACK(DT_KEYMAP, keymap_data, MATRIX_ROWS * MATRIX_COLS * 4 + 3);
-                //     // uint8_t keymap_data[5];
-                //     // keymap_data[0] = data[2];
-                //     // keymap_data[1] = data[3];
-                //     // keymap_data[2] = data[4];
-                //     // keymap_data[3] = pgm_read_word(&keymaps[data[2]][data[3]][data[4]]) >> 8;
-                //     // keymap_data[4] = pgm_read_word(&keymaps[data[2]][data[3]][data[4]]) & 0xFF;
-
-                //     // MT_GET_DATA_ACK(DT_KEYMAP, keymap_data, 5);
-                //     break;
-                // }
-                default:
-                    break;
-            }
-            break;
-        case MT_SET_DATA_ACK:
-        case MT_GET_DATA_ACK:
-            break;
-        case MT_SEND_DATA:
-            break;
-        case MT_SEND_DATA_ACK:
-            break;
-        case MT_EXE_ACTION:
-            break;
-        case MT_EXE_ACTION_ACK:
-            break;
-        case MT_TYPE_ERROR:
-            break;
-        default:;  // command not recognised
-            SEND_BYTES(MT_TYPE_ERROR, DT_NONE, data, length);
-            break;
-
-            // #ifdef RGBLIGHT_ENABLE
-            // case 0x27: ; // RGB LED functions
-            //     switch (*data++) {
-            //         case 0x00: ; // Update HSV
-            //             rgblight_sethsv((data[0] << 8 | data[1]) % 360, data[2], data[3]);
-            //             break;
-            //         case 0x01: ; // Update RGB
-            //             break;
-            //         case 0x02: ; // Update mode
-            //             rgblight_mode(data[0]);
-            //             break;
-            //     }
-            //     break;
-            // #endif
-    }
-}
diff --git a/quantum/api.h b/quantum/api.h
deleted file mode 100644
index 0a30e9d6c..000000000
--- a/quantum/api.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/* Copyright 2016 Jack Humbert
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#ifdef __AVR__
-#    include "lufa.h"
-#endif
-
-enum MESSAGE_TYPE {
-    MT_GET_DATA       = 0x10,  // Get data from keyboard
-    MT_GET_DATA_ACK   = 0x11,  // returned data to process (ACK)
-    MT_SET_DATA       = 0x20,  // Set data on keyboard
-    MT_SET_DATA_ACK   = 0x21,  // returned data to confirm (ACK)
-    MT_SEND_DATA      = 0x30,  // Sending data/action from keyboard
-    MT_SEND_DATA_ACK  = 0x31,  // returned data/action confirmation (ACK)
-    MT_EXE_ACTION     = 0x40,  // executing actions on keyboard
-    MT_EXE_ACTION_ACK = 0x41,  // return confirmation/value (ACK)
-    MT_TYPE_ERROR     = 0x80   // type not recognised (ACK)
-};
-
-enum DATA_TYPE { DT_NONE = 0x00, DT_HANDSHAKE, DT_DEFAULT_LAYER, DT_CURRENT_LAYER, DT_KEYMAP_OPTIONS, DT_BACKLIGHT, DT_RGBLIGHT, DT_UNICODE, DT_DEBUG, DT_AUDIO, DT_QUANTUM_ACTION, DT_KEYBOARD_ACTION, DT_USER_ACTION, DT_KEYMAP_SIZE, DT_KEYMAP };
-
-void     dword_to_bytes(uint32_t dword, uint8_t* bytes);
-uint32_t bytes_to_dword(uint8_t* bytes, uint8_t index);
-
-#define MT_GET_DATA(data_type, data, length) SEND_BYTES(MT_GET_DATA, data_type, data, length)
-#define MT_GET_DATA_ACK(data_type, data, length) SEND_BYTES(MT_GET_DATA_ACK, data_type, data, length)
-#define MT_SET_DATA(data_type, data, length) SEND_BYTES(MT_SET_DATA, data_type, data, length)
-#define MT_SET_DATA_ACK(data_type, data, length) SEND_BYTES(MT_SET_DATA_ACK, data_type, data, length)
-#define MT_SEND_DATA(data_type, data, length) SEND_BYTES(MT_SEND_DATA, data_type, data, length)
-#define MT_SEND_DATA_ACK(data_type, data, length) SEND_BYTES(MT_SEND_DATA_ACK, data_type, data, length)
-#define MT_EXE_ACTION(data_type, data, length) SEND_BYTES(MT_EXE_ACTION, data_type, data, length)
-#define MT_EXE_ACTION_ACK(data_type, data, length) SEND_BYTES(MT_EXE_ACTION_ACK, data_type, data, length)
-
-void process_api(uint16_t length, uint8_t* data);
-
-__attribute__((weak)) bool process_api_quantum(uint8_t length, uint8_t* data);
-
-__attribute__((weak)) bool process_api_keyboard(uint8_t length, uint8_t* data);
-
-__attribute__((weak)) bool process_api_user(uint8_t length, uint8_t* data);
diff --git a/quantum/api/api_sysex.c b/quantum/api/api_sysex.c
deleted file mode 100644
index 07c90cf80..000000000
--- a/quantum/api/api_sysex.c
+++ /dev/null
@@ -1,72 +0,0 @@
-/* Copyright 2016 Jack Humbert, Fred Sundvik
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "api_sysex.h"
-#include "sysex_tools.h"
-#include "print.h"
-#include "qmk_midi.h"
-
-void send_bytes_sysex(uint8_t message_type, uint8_t data_type, uint8_t* bytes, uint16_t length) {
-    // SEND_STRING("\nTX: ");
-    // for (uint8_t i = 0; i < length; i++) {
-    //     send_byte(bytes[i]);
-    //     SEND_STRING(" ");
-    // }
-    if (length > API_SYSEX_MAX_SIZE) {
-        xprintf("Sysex msg too big %d %d %d", message_type, data_type, length);
-        return;
-    }
-
-    // The buffer size required is calculated as the following
-    // API_SYSEX_MAX_SIZE is the maximum length
-    // In addition to that we have a two byte message header consisting of the message_type and data_type
-    // This has to be encoded with an additional overhead of one byte for every starting 7 bytes
-    // We just add one extra byte in case it's not divisible by 7
-    // Then we have an unencoded header consisting of 4 bytes
-    // Plus a one byte terminator
-    const unsigned message_header    = 2;
-    const unsigned unencoded_message = API_SYSEX_MAX_SIZE + message_header;
-    const unsigned encoding_overhead = unencoded_message / 7 + 1;
-    const unsigned encoded_size      = unencoded_message + encoding_overhead;
-    const unsigned unencoded_header  = 4;
-    const unsigned terminator        = 1;
-    const unsigned buffer_size       = encoded_size + unencoded_header + terminator;
-    uint8_t        buffer[encoded_size + unencoded_header + terminator];
-    // The unencoded header
-    buffer[0] = 0xF0;
-    buffer[1] = 0x00;
-    buffer[2] = 0x00;
-    buffer[3] = 0x00;
-
-    // We copy the message to the end of the array, this way we can do an inplace encoding, using the same
-    // buffer for both input and output
-    const unsigned message_size    = length + message_header;
-    uint8_t*       unencoded_start = buffer + buffer_size - message_size;
-    uint8_t*       ptr             = unencoded_start;
-    *(ptr++)                       = message_type;
-    *(ptr++)                       = data_type;
-    memcpy(ptr, bytes, length);
-
-    unsigned encoded_length = sysex_encode(buffer + unencoded_header, unencoded_start, message_size);
-    unsigned final_size     = unencoded_header + encoded_length + terminator;
-    buffer[final_size - 1]  = 0xF7;
-    midi_send_array(&midi_device, final_size, buffer);
-
-    // SEND_STRING("\nTD: ");
-    // for (uint8_t i = 0; i < encoded_length + 5; i++) {
-    //     send_byte(buffer[i]);
-    //     SEND_STRING(" ");
-    // }
-}
diff --git a/quantum/api/api_sysex.h b/quantum/api/api_sysex.h
deleted file mode 100644
index eb0a18848..000000000
--- a/quantum/api/api_sysex.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* Copyright 2016 Jack Humbert
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include "api.h"
-
-#define API_SYSEX_MAX_SIZE 32
-
-void send_bytes_sysex(uint8_t message_type, uint8_t data_type, uint8_t* bytes, uint16_t length);
-
-#define SEND_BYTES(mt, dt, b, l) send_bytes_sysex(mt, dt, b, l)
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 326c8370b..ac8857df8 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -25,10 +25,6 @@
 #    include "backlight.h"
 #endif
 
-#ifdef API_ENABLE
-#    include "api.h"
-#endif
-
 #ifdef MIDI_ENABLE
 #    include "process_midi.h"
 #endif
@@ -145,12 +141,13 @@ void reset_keyboard(void) {
 /* Convert record into usable keycode via the contained event. */
 uint16_t get_record_keycode(keyrecord_t *record, bool update_layer_cache) {
 #ifdef COMBO_ENABLE
-    if (record->keycode) { return record->keycode; }
+    if (record->keycode) {
+        return record->keycode;
+    }
 #endif
     return get_event_keycode(record->event, update_layer_cache);
 }
 
-
 /* Convert event into usable keycode. Checks the layer cache to ensure that it
  * retains the correct keycode after a layer change, if the key is still pressed.
  * "update_layer_cache" is to ensure that it only updates the layer cache when
@@ -179,12 +176,12 @@ uint16_t get_event_keycode(keyevent_t event, bool update_layer_cache) {
 bool pre_process_record_quantum(keyrecord_t *record) {
     if (!(
 #ifdef COMBO_ENABLE
-        process_combo(get_record_keycode(record, true), record) &&
+            process_combo(get_record_keycode(record, true), record) &&
 #endif
-        true)) {
+            true)) {
         return false;
     }
-    return true; // continue processing
+    return true;  // continue processing
 }
 
 /* Get keycode, and then call keyboard function */
@@ -468,14 +465,6 @@ void matrix_scan_quantum() {
 #    include "hd44780.h"
 #endif
 
-void api_send_unicode(uint32_t unicode) {
-#ifdef API_ENABLE
-    uint8_t chunk[4];
-    dword_to_bytes(unicode, chunk);
-    MT_SEND_DATA(DT_UNICODE, chunk, 5);
-#endif
-}
-
 //------------------------------------------------------------------------------
 // Override these functions in your keymap file to play different tunes on
 // different events such as startup and bootloader jump
diff --git a/quantum/quantum.h b/quantum/quantum.h
index 5cbe84d0c..9250f5acc 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -237,5 +237,3 @@ void led_set_user(uint8_t usb_led);
 void led_set_kb(uint8_t usb_led);
 bool led_update_user(led_t led_state);
 bool led_update_kb(led_t led_state);
-
-void api_send_unicode(uint32_t unicode);
diff --git a/show_options.mk b/show_options.mk
index 2cae1cfa1..35fca9c6b 100644
--- a/show_options.mk
+++ b/show_options.mk
@@ -40,7 +40,6 @@ OTHER_OPTION_NAMES = \
   UCIS_ENABLE \
   UNICODEMAP_ENABLE \
   UNICODE_COMMON \
-  API_SYSEX_ENABLE \
   AUTO_SHIFT_ENABLE \
   AUTO_SHIFT_MODIFIERS \
   COMBO_ENABLE \
diff --git a/tmk_core/protocol/lufa/lufa.h b/tmk_core/protocol/lufa/lufa.h
index 348a84c03..6a5205609 100644
--- a/tmk_core/protocol/lufa/lufa.h
+++ b/tmk_core/protocol/lufa/lufa.h
@@ -56,14 +56,3 @@ extern host_driver_t lufa_driver;
 #ifdef __cplusplus
 }
 #endif
-
-#ifdef API_ENABLE
-#    include "api.h"
-#endif
-
-#ifdef API_SYSEX_ENABLE
-#    include "api_sysex.h"
-// Allocate space for encoding overhead.
-// The header and terminator are not stored to save a few bytes of precious ram
-#    define MIDI_SYSEX_BUFFER (API_SYSEX_MAX_SIZE + API_SYSEX_MAX_SIZE / 7 + (API_SYSEX_MAX_SIZE % 7 ? 1 : 0))
-#endif
diff --git a/tmk_core/protocol/midi/qmk_midi.c b/tmk_core/protocol/midi/qmk_midi.c
index c18dbf993..3a454d61a 100644
--- a/tmk_core/protocol/midi/qmk_midi.c
+++ b/tmk_core/protocol/midi/qmk_midi.c
@@ -4,9 +4,6 @@
 #include "midi.h"
 #include "usb_descriptor.h"
 #include "process_midi.h"
-#if API_SYSEX_ENABLE
-#    include "api_sysex.h"
-#endif
 
 /*******************************************************************************
  * MIDI
@@ -124,41 +121,6 @@ static void cc_callback(MidiDevice* device, uint8_t chan, uint8_t num, uint8_t v
     // midi_send_cc(device, (chan + 1) % 16, num, val);
 }
 
-#ifdef API_SYSEX_ENABLE
-uint8_t midi_buffer[MIDI_SYSEX_BUFFER] = {0};
-
-static void sysex_callback(MidiDevice* device, uint16_t start, uint8_t length, uint8_t* data) {
-    // SEND_STRING("\n");
-    // send_word(start);
-    // SEND_STRING(": ");
-    // Don't store the header
-    int16_t pos = start - 4;
-    for (uint8_t place = 0; place < length; place++) {
-        // send_byte(*data);
-        if (pos >= 0) {
-            if (*data == 0xF7) {
-                // SEND_STRING("\nRD: ");
-                // for (uint8_t i = 0; i < start + place + 1; i++){
-                //     send_byte(midi_buffer[i]);
-                // SEND_STRING(" ");
-                // }
-                const unsigned decoded_length = sysex_decoded_length(pos);
-                uint8_t        decoded[API_SYSEX_MAX_SIZE];
-                sysex_decode(decoded, midi_buffer, pos);
-                process_api(decoded_length, decoded);
-                return;
-            } else if (pos >= MIDI_SYSEX_BUFFER) {
-                return;
-            }
-            midi_buffer[pos] = *data;
-        }
-        // SEND_STRING(" ");
-        data++;
-        pos++;
-    }
-}
-#endif
-
 void midi_init(void);
 
 void setup_midi(void) {
@@ -170,7 +132,4 @@ void setup_midi(void) {
     midi_device_set_pre_input_process_func(&midi_device, usb_get_midi);
     midi_register_fallthrough_callback(&midi_device, fallthrough_callback);
     midi_register_cc_callback(&midi_device, cc_callback);
-#ifdef API_SYSEX_ENABLE
-    midi_register_sysex_callback(&midi_device, sysex_callback);
-#endif
 }
diff --git a/users/nstickney/rules.mk b/users/nstickney/rules.mk
index 0f189e8a4..6b3671ddb 100644
--- a/users/nstickney/rules.mk
+++ b/users/nstickney/rules.mk
@@ -25,7 +25,6 @@ UCIS_ENABLE = no
 LTO_ENABLE = yes
 
 # https://beta.docs.qmk.fm/developing-qmk/qmk-reference/getting_started_make_guide#rules-mk-options
-API_SYSEX_ENABLE = no
 AUDIO_ENABLE = no
 BOOTMAGIC_ENABLE = no
 COMMAND_ENABLE = no