Move Doxygen docs to subdirectory (#16561)

7 files changed, 777 insertions, 0 deletions

diff --git a/docs/internals/defines.md b/docs/internals/defines.md
new file mode 100644
index 0000000000..fdcb553589
--- /dev/null
+++ b/docs/internals/defines.md
@@ -0,0 +1,78 @@
+# group `defines` {#group__defines}
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`define `[`SYSEX_BEGIN`](#group__defines_1ga1a3c39bb790dda8a368c4247caabcf79)            | 
+`define `[`SYSEX_END`](#group__defines_1ga753706d1d28e6f96d7caf1973e80feed)            | 
+`define `[`MIDI_STATUSMASK`](#group__defines_1gab78a1c818a5f5dab7a8946543f126c69)            | 
+`define `[`MIDI_CHANMASK`](#group__defines_1ga239edc0a6f8405d3a8f2804f1590b909)            | 
+`define `[`MIDI_CC`](#group__defines_1ga45f116a1daab76b3c930c2cecfaef215)            | 
+`define `[`MIDI_NOTEON`](#group__defines_1gafd416f27bf3590868c0c1f55c30be4c7)            | 
+`define `[`MIDI_NOTEOFF`](#group__defines_1gabed24bea2d989fd655e2ef2ad0765adc)            | 
+`define `[`MIDI_AFTERTOUCH`](#group__defines_1ga3a322d8cfd53576a2e167c1840551b0f)            | 
+`define `[`MIDI_PITCHBEND`](#group__defines_1gabcc799504e8064679bca03f232223af4)            | 
+`define `[`MIDI_PROGCHANGE`](#group__defines_1gaefb3f1595ffbb9db66b46c2c919a3d42)            | 
+`define `[`MIDI_CHANPRESSURE`](#group__defines_1gaeb3281cc7fcd0daade8ed3d2dfc33dbe)            | 
+`define `[`MIDI_CLOCK`](#group__defines_1gafa5e4e295aafd15ab7893344599b3b89)            | 
+`define `[`MIDI_TICK`](#group__defines_1ga3b99408ff864613765d4c3c2ceb52aa7)            | 
+`define `[`MIDI_START`](#group__defines_1ga8233631c85823aa546f932ad8975caa4)            | 
+`define `[`MIDI_CONTINUE`](#group__defines_1gab24430f0081e27215b0da84dd0ee745c)            | 
+`define `[`MIDI_STOP`](#group__defines_1ga3af9271d4b1f0d22904a0b055f48cf62)            | 
+`define `[`MIDI_ACTIVESENSE`](#group__defines_1gacd88ed42dba52bb4b2052c5656362677)            | 
+`define `[`MIDI_RESET`](#group__defines_1ga02947f30ca62dc332fdeb10c5868323b)            | 
+`define `[`MIDI_TC_QUARTERFRAME`](#group__defines_1gaaa072f33590e236d1bfd8f28e833ae31)            | 
+`define `[`MIDI_SONGPOSITION`](#group__defines_1ga412f6ed33a2150051374bee334ee1705)            | 
+`define `[`MIDI_SONGSELECT`](#group__defines_1gafcab254838b028365ae0259729e72c4e)            | 
+`define `[`MIDI_TUNEREQUEST`](#group__defines_1ga8100b907b8c0a84e58b1c53dcd9bd795)            | 
+`define `[`SYSEX_EDUMANUFID`](#group__defines_1ga5ef855ed955b00a2239ca16afbeb164f)            | 
+
+## Members
+
+#### `define `[`SYSEX_BEGIN`](#group__defines_1ga1a3c39bb790dda8a368c4247caabcf79) {#group__defines_1ga1a3c39bb790dda8a368c4247caabcf79}
+
+#### `define `[`SYSEX_END`](#group__defines_1ga753706d1d28e6f96d7caf1973e80feed) {#group__defines_1ga753706d1d28e6f96d7caf1973e80feed}
+
+#### `define `[`MIDI_STATUSMASK`](#group__defines_1gab78a1c818a5f5dab7a8946543f126c69) {#group__defines_1gab78a1c818a5f5dab7a8946543f126c69}
+
+#### `define `[`MIDI_CHANMASK`](#group__defines_1ga239edc0a6f8405d3a8f2804f1590b909) {#group__defines_1ga239edc0a6f8405d3a8f2804f1590b909}
+
+#### `define `[`MIDI_CC`](#group__defines_1ga45f116a1daab76b3c930c2cecfaef215) {#group__defines_1ga45f116a1daab76b3c930c2cecfaef215}
+
+#### `define `[`MIDI_NOTEON`](#group__defines_1gafd416f27bf3590868c0c1f55c30be4c7) {#group__defines_1gafd416f27bf3590868c0c1f55c30be4c7}
+
+#### `define `[`MIDI_NOTEOFF`](#group__defines_1gabed24bea2d989fd655e2ef2ad0765adc) {#group__defines_1gabed24bea2d989fd655e2ef2ad0765adc}
+
+#### `define `[`MIDI_AFTERTOUCH`](#group__defines_1ga3a322d8cfd53576a2e167c1840551b0f) {#group__defines_1ga3a322d8cfd53576a2e167c1840551b0f}
+
+#### `define `[`MIDI_PITCHBEND`](#group__defines_1gabcc799504e8064679bca03f232223af4) {#group__defines_1gabcc799504e8064679bca03f232223af4}
+
+#### `define `[`MIDI_PROGCHANGE`](#group__defines_1gaefb3f1595ffbb9db66b46c2c919a3d42) {#group__defines_1gaefb3f1595ffbb9db66b46c2c919a3d42}
+
+#### `define `[`MIDI_CHANPRESSURE`](#group__defines_1gaeb3281cc7fcd0daade8ed3d2dfc33dbe) {#group__defines_1gaeb3281cc7fcd0daade8ed3d2dfc33dbe}
+
+#### `define `[`MIDI_CLOCK`](#group__defines_1gafa5e4e295aafd15ab7893344599b3b89) {#group__defines_1gafa5e4e295aafd15ab7893344599b3b89}
+
+#### `define `[`MIDI_TICK`](#group__defines_1ga3b99408ff864613765d4c3c2ceb52aa7) {#group__defines_1ga3b99408ff864613765d4c3c2ceb52aa7}
+
+#### `define `[`MIDI_START`](#group__defines_1ga8233631c85823aa546f932ad8975caa4) {#group__defines_1ga8233631c85823aa546f932ad8975caa4}
+
+#### `define `[`MIDI_CONTINUE`](#group__defines_1gab24430f0081e27215b0da84dd0ee745c) {#group__defines_1gab24430f0081e27215b0da84dd0ee745c}
+
+#### `define `[`MIDI_STOP`](#group__defines_1ga3af9271d4b1f0d22904a0b055f48cf62) {#group__defines_1ga3af9271d4b1f0d22904a0b055f48cf62}
+
+#### `define `[`MIDI_ACTIVESENSE`](#group__defines_1gacd88ed42dba52bb4b2052c5656362677) {#group__defines_1gacd88ed42dba52bb4b2052c5656362677}
+
+#### `define `[`MIDI_RESET`](#group__defines_1ga02947f30ca62dc332fdeb10c5868323b) {#group__defines_1ga02947f30ca62dc332fdeb10c5868323b}
+
+#### `define `[`MIDI_TC_QUARTERFRAME`](#group__defines_1gaaa072f33590e236d1bfd8f28e833ae31) {#group__defines_1gaaa072f33590e236d1bfd8f28e833ae31}
+
+#### `define `[`MIDI_SONGPOSITION`](#group__defines_1ga412f6ed33a2150051374bee334ee1705) {#group__defines_1ga412f6ed33a2150051374bee334ee1705}
+
+#### `define `[`MIDI_SONGSELECT`](#group__defines_1gafcab254838b028365ae0259729e72c4e) {#group__defines_1gafcab254838b028365ae0259729e72c4e}
+
+#### `define `[`MIDI_TUNEREQUEST`](#group__defines_1ga8100b907b8c0a84e58b1c53dcd9bd795) {#group__defines_1ga8100b907b8c0a84e58b1c53dcd9bd795}
+
+#### `define `[`SYSEX_EDUMANUFID`](#group__defines_1ga5ef855ed955b00a2239ca16afbeb164f) {#group__defines_1ga5ef855ed955b00a2239ca16afbeb164f}
+
diff --git a/docs/internals/input_callback_reg.md b/docs/internals/input_callback_reg.md
new file mode 100644
index 0000000000..4ea132a83a
--- /dev/null
+++ b/docs/internals/input_callback_reg.md
@@ -0,0 +1,169 @@
+# group `input_callback_reg` {#group__input__callback__reg}
+
+These are the functions you use to register your input callbacks.
+
+The functions are called when the appropriate midi message is matched on the associated device's input.
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public void `[`midi_register_cc_callback`](#group__input__callback__reg_1ga64ab672abbbe393c9c4a83110c8df718)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a control change message (cc) callback.
+`public void `[`midi_register_noteon_callback`](#group__input__callback__reg_1ga3962f276c17618923f1152779552103e)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a note on callback.
+`public void `[`midi_register_noteoff_callback`](#group__input__callback__reg_1gac847b66051bd6d53b762958be0ec4c6d)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a note off callback.
+`public void `[`midi_register_aftertouch_callback`](#group__input__callback__reg_1gaa95bc901bd9edff956a667c9a69dd01f)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register an after touch callback.
+`public void `[`midi_register_pitchbend_callback`](#group__input__callback__reg_1ga071a28f02ba14f53de219be70ebd9a48)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a pitch bend callback.
+`public void `[`midi_register_songposition_callback`](#group__input__callback__reg_1gaf2adfd79637f3553d8f26deb1ca22ed6)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a song position callback.
+`public void `[`midi_register_progchange_callback`](#group__input__callback__reg_1gae6ba1a35a4cde9bd15dd42f87401d127)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)`            | Register a program change callback.
+`public void `[`midi_register_chanpressure_callback`](#group__input__callback__reg_1ga39b31f1f4fb93917ce039b958f21b4f5)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)`            | Register a channel pressure callback.
+`public void `[`midi_register_songselect_callback`](#group__input__callback__reg_1gaf9aafc76a2dc4b9fdbb4106cbda6ce72)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)`            | Register a song select callback.
+`public void `[`midi_register_tc_quarterframe_callback`](#group__input__callback__reg_1ga0a119fada2becc628cb15d753b257e6e)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)`            | Register a tc quarter frame callback.
+`public void `[`midi_register_realtime_callback`](#group__input__callback__reg_1ga764f440e857b89084b1a07f9da2ff93a)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_one_byte_func_t func)`            | Register a realtime callback.
+`public void `[`midi_register_tunerequest_callback`](#group__input__callback__reg_1gae40ff3ce20bda79fef87da24b8321cb1)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_one_byte_func_t func)`            | Register a tune request callback.
+`public void `[`midi_register_sysex_callback`](#group__input__callback__reg_1ga63ce9631b025785c1848d0122d4c4c48)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_sysex_func_t func)`            | Register a sysex callback.
+`public void `[`midi_register_fallthrough_callback`](#group__input__callback__reg_1ga7ed189164aa9682862b3181153afbd94)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t func)`            | Register fall through callback.
+`public void `[`midi_register_catchall_callback`](#group__input__callback__reg_1ga9dbfed568d047a6cd05708f11fe39e99)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t func)`            | Register a catch all callback.
+
+## Members
+
+#### `public void `[`midi_register_cc_callback`](#group__input__callback__reg_1ga64ab672abbbe393c9c4a83110c8df718)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1ga64ab672abbbe393c9c4a83110c8df718}
+
+Register a control change message (cc) callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_noteon_callback`](#group__input__callback__reg_1ga3962f276c17618923f1152779552103e)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1ga3962f276c17618923f1152779552103e}
+
+Register a note on callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_noteoff_callback`](#group__input__callback__reg_1gac847b66051bd6d53b762958be0ec4c6d)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1gac847b66051bd6d53b762958be0ec4c6d}
+
+Register a note off callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_aftertouch_callback`](#group__input__callback__reg_1gaa95bc901bd9edff956a667c9a69dd01f)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1gaa95bc901bd9edff956a667c9a69dd01f}
+
+Register an after touch callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_pitchbend_callback`](#group__input__callback__reg_1ga071a28f02ba14f53de219be70ebd9a48)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1ga071a28f02ba14f53de219be70ebd9a48}
+
+Register a pitch bend callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_songposition_callback`](#group__input__callback__reg_1gaf2adfd79637f3553d8f26deb1ca22ed6)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1gaf2adfd79637f3553d8f26deb1ca22ed6}
+
+Register a song position callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_progchange_callback`](#group__input__callback__reg_1gae6ba1a35a4cde9bd15dd42f87401d127)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)` {#group__input__callback__reg_1gae6ba1a35a4cde9bd15dd42f87401d127}
+
+Register a program change callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_chanpressure_callback`](#group__input__callback__reg_1ga39b31f1f4fb93917ce039b958f21b4f5)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)` {#group__input__callback__reg_1ga39b31f1f4fb93917ce039b958f21b4f5}
+
+Register a channel pressure callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_songselect_callback`](#group__input__callback__reg_1gaf9aafc76a2dc4b9fdbb4106cbda6ce72)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)` {#group__input__callback__reg_1gaf9aafc76a2dc4b9fdbb4106cbda6ce72}
+
+Register a song select callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_tc_quarterframe_callback`](#group__input__callback__reg_1ga0a119fada2becc628cb15d753b257e6e)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)` {#group__input__callback__reg_1ga0a119fada2becc628cb15d753b257e6e}
+
+Register a tc quarter frame callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_realtime_callback`](#group__input__callback__reg_1ga764f440e857b89084b1a07f9da2ff93a)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_one_byte_func_t func)` {#group__input__callback__reg_1ga764f440e857b89084b1a07f9da2ff93a}
+
+Register a realtime callback.
+
+The callback will be called for all of the real time message types.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_tunerequest_callback`](#group__input__callback__reg_1gae40ff3ce20bda79fef87da24b8321cb1)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_one_byte_func_t func)` {#group__input__callback__reg_1gae40ff3ce20bda79fef87da24b8321cb1}
+
+Register a tune request callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_sysex_callback`](#group__input__callback__reg_1ga63ce9631b025785c1848d0122d4c4c48)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_sysex_func_t func)` {#group__input__callback__reg_1ga63ce9631b025785c1848d0122d4c4c48}
+
+Register a sysex callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_fallthrough_callback`](#group__input__callback__reg_1ga7ed189164aa9682862b3181153afbd94)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t func)` {#group__input__callback__reg_1ga7ed189164aa9682862b3181153afbd94}
+
+Register fall through callback.
+
+This is only called if a more specific callback is not matched and called. For instance, if you don't register a note on callback but you get a note on message the fall through callback will be called, if it is registered.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_catchall_callback`](#group__input__callback__reg_1ga9dbfed568d047a6cd05708f11fe39e99)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t func)` {#group__input__callback__reg_1ga9dbfed568d047a6cd05708f11fe39e99}
+
+Register a catch all callback.
+
+If registered, the catch all callback is called for every message that is matched, even if a more specific or the fallthrough callback is registered.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
diff --git a/docs/internals/midi_device.md b/docs/internals/midi_device.md
new file mode 100644
index 0000000000..5b57abd454
--- /dev/null
+++ b/docs/internals/midi_device.md
@@ -0,0 +1,143 @@
+# group `midi_device` {#group__midi__device}
+
+You use the functions when you are implementing your own midi device.
+
+You set a send function to actually send bytes via your device, this method is called when you call a send function with this device, for instance midi_send_cc
+
+You use the midi_device_input to process input data from the device and pass it through the device's associated callbacks.
+
+You use the midi_device_set_pre_input_process_func if you want to have a function called at the beginning of the device's process function, generally to poll for input and pass that into midi_device_input
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`define `[`MIDI_INPUT_QUEUE_LENGTH`](#group__midi__device_1ga4aaa419caebdca2bbdfc1331e79781a8)            | 
+`enum `[`input_state_t`](#group__midi__device_1gac203e877d3df4275ceb8e7180a61f621)            | 
+`public void `[`midi_device_input`](#group__midi__device_1gad8d3db8eb35d9cfa51ef036a0a9d70db)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t cnt,uint8_t * input)`            | Process input bytes. This function parses bytes and calls the appropriate callbacks associated with the given device. You use this function if you are creating a custom device and you want to have midi input.
+`public void `[`midi_device_set_send_func`](#group__midi__device_1ga59f5a46bdd4452f186cc73d9e96d4673)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t send_func)`            | Set the callback function that will be used for sending output data bytes. This is only used if you're creating a custom device. You'll most likely want the callback function to disable interrupts so that you can call the various midi send functions without worrying about locking.
+`public void `[`midi_device_set_pre_input_process_func`](#group__midi__device_1ga4de0841b87c04fc23cb56b6451f33b69)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_no_byte_func_t pre_process_func)`            | Set a callback which is called at the beginning of the midi_device_process call. This can be used to poll for input data and send the data through the midi_device_input function. You'll probably only use this if you're creating a custom device.
+`struct `[`_midi_device`](docs/api_midi_device.md#struct__midi__device) | This structure represents the input and output functions and processing data for a midi device.
+
+## Members
+
+#### `define `[`MIDI_INPUT_QUEUE_LENGTH`](#group__midi__device_1ga4aaa419caebdca2bbdfc1331e79781a8) {#group__midi__device_1ga4aaa419caebdca2bbdfc1331e79781a8}
+
+#### `enum `[`input_state_t`](#group__midi__device_1gac203e877d3df4275ceb8e7180a61f621) {#group__midi__device_1gac203e877d3df4275ceb8e7180a61f621}
+
+ Values                         | Descriptions                                
+--------------------------------|---------------------------------------------
+IDLE            | 
+ONE_BYTE_MESSAGE            | 
+TWO_BYTE_MESSAGE            | 
+THREE_BYTE_MESSAGE            | 
+SYSEX_MESSAGE            | 
+
+#### `public void `[`midi_device_input`](#group__midi__device_1gad8d3db8eb35d9cfa51ef036a0a9d70db)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t cnt,uint8_t * input)` {#group__midi__device_1gad8d3db8eb35d9cfa51ef036a0a9d70db}
+
+Process input bytes. This function parses bytes and calls the appropriate callbacks associated with the given device. You use this function if you are creating a custom device and you want to have midi input.
+
+#### Parameters
+* `device` the midi device to associate the input with 
+
+* `cnt` the number of bytes you are processing 
+
+* `input` the bytes to process
+
+#### `public void `[`midi_device_set_send_func`](#group__midi__device_1ga59f5a46bdd4452f186cc73d9e96d4673)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t send_func)` {#group__midi__device_1ga59f5a46bdd4452f186cc73d9e96d4673}
+
+Set the callback function that will be used for sending output data bytes. This is only used if you're creating a custom device. You'll most likely want the callback function to disable interrupts so that you can call the various midi send functions without worrying about locking.
+
+#### Parameters
+* `device` the midi device to associate this callback with 
+
+* `send_func` the callback function that will do the sending
+
+#### `public void `[`midi_device_set_pre_input_process_func`](#group__midi__device_1ga4de0841b87c04fc23cb56b6451f33b69)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_no_byte_func_t pre_process_func)` {#group__midi__device_1ga4de0841b87c04fc23cb56b6451f33b69}
+
+Set a callback which is called at the beginning of the midi_device_process call. This can be used to poll for input data and send the data through the midi_device_input function. You'll probably only use this if you're creating a custom device.
+
+#### Parameters
+* `device` the midi device to associate this callback with 
+
+* `midi_no_byte_func_t` the actual callback function
+
+# struct `_midi_device` {#struct__midi__device}
+
+This structure represents the input and output functions and processing data for a midi device.
+
+A device can represent an actual physical device [serial port, usb port] or something virtual. You should not need to modify this structure directly.
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public midi_var_byte_func_t `[`send_func`](docs/api_midi_device.md#struct__midi__device_1a25d4c94b4bbccd5b98f1032b469f3ff9) | 
+`public midi_three_byte_func_t `[`input_cc_callback`](docs/api_midi_device.md#struct__midi__device_1a6da5236c1bc73877728df92d213a78d1) | 
+`public midi_three_byte_func_t `[`input_noteon_callback`](docs/api_midi_device.md#struct__midi__device_1aa10b15cf1a7fb825a5df0d2abbe34a1c) | 
+`public midi_three_byte_func_t `[`input_noteoff_callback`](docs/api_midi_device.md#struct__midi__device_1aaf290043078534d3a5a0ea4c840eba84) | 
+`public midi_three_byte_func_t `[`input_aftertouch_callback`](docs/api_midi_device.md#struct__midi__device_1acb0b4901c545cec4b28b126f2d8c315f) | 
+`public midi_three_byte_func_t `[`input_pitchbend_callback`](docs/api_midi_device.md#struct__midi__device_1a305fea672caeb996f2233bf8cd2bef18) | 
+`public midi_three_byte_func_t `[`input_songposition_callback`](docs/api_midi_device.md#struct__midi__device_1a5f3f13638b3fef3fc561ed1bf301d586) | 
+`public midi_two_byte_func_t `[`input_progchange_callback`](docs/api_midi_device.md#struct__midi__device_1adaf1da617c9a10a9dcad00ab1959d3da) | 
+`public midi_two_byte_func_t `[`input_chanpressure_callback`](docs/api_midi_device.md#struct__midi__device_1ab7ca2925c539915d43974eff604d85f7) | 
+`public midi_two_byte_func_t `[`input_songselect_callback`](docs/api_midi_device.md#struct__midi__device_1a89bed8a5a55376120cfc0a62b42f057f) | 
+`public midi_two_byte_func_t `[`input_tc_quarterframe_callback`](docs/api_midi_device.md#struct__midi__device_1ad9813e75d22e284f9f65a907d20600f0) | 
+`public midi_one_byte_func_t `[`input_realtime_callback`](docs/api_midi_device.md#struct__midi__device_1a9448eba4afb7e43650434748db3777be) | 
+`public midi_one_byte_func_t `[`input_tunerequest_callback`](docs/api_midi_device.md#struct__midi__device_1a0cb8fd53e00cf1d4202d4fa04d038e8d) | 
+`public midi_sysex_func_t `[`input_sysex_callback`](docs/api_midi_device.md#struct__midi__device_1afff9a0ce641762aaef24c1e6953ec9a2) | 
+`public midi_var_byte_func_t `[`input_fallthrough_callback`](docs/api_midi_device.md#struct__midi__device_1abb974ec6d734001b4a0e370f292be503) | 
+`public midi_var_byte_func_t `[`input_catchall_callback`](docs/api_midi_device.md#struct__midi__device_1aae0d535129d4fd650edc98eb3f7584f8) | 
+`public midi_no_byte_func_t `[`pre_input_process_callback`](docs/api_midi_device.md#struct__midi__device_1aeb0bb8923d66c23d874e177dc4265754) | 
+`public uint8_t `[`input_buffer`](docs/api_midi_device.md#struct__midi__device_1a7c5684857d6af4ebc4dc12da27bd6b2a) | 
+`public input_state_t `[`input_state`](docs/api_midi_device.md#struct__midi__device_1a69a687d2d1c449ec15a11c07a5722e39) | 
+`public uint16_t `[`input_count`](docs/api_midi_device.md#struct__midi__device_1a68dea8e7b6151e89c85c95caa612ee5d) | 
+`public uint8_t `[`input_queue_data`](docs/api_midi_device.md#struct__midi__device_1ada41de021135dc423abedcbb30f366ff) | 
+`public `[`byteQueue_t`](#structbyte_queue__t)` `[`input_queue`](#struct__midi__device_1a49c8538a8a02193c58e28a56eb695d8f) | 
+
+## Members
+
+#### `public midi_var_byte_func_t `[`send_func`](docs/api_midi_device.md#struct__midi__device_1a25d4c94b4bbccd5b98f1032b469f3ff9) {#struct__midi__device_1a25d4c94b4bbccd5b98f1032b469f3ff9}
+
+#### `public midi_three_byte_func_t `[`input_cc_callback`](docs/api_midi_device.md#struct__midi__device_1a6da5236c1bc73877728df92d213a78d1) {#struct__midi__device_1a6da5236c1bc73877728df92d213a78d1}
+
+#### `public midi_three_byte_func_t `[`input_noteon_callback`](docs/api_midi_device.md#struct__midi__device_1aa10b15cf1a7fb825a5df0d2abbe34a1c) {#struct__midi__device_1aa10b15cf1a7fb825a5df0d2abbe34a1c}
+
+#### `public midi_three_byte_func_t `[`input_noteoff_callback`](docs/api_midi_device.md#struct__midi__device_1aaf290043078534d3a5a0ea4c840eba84) {#struct__midi__device_1aaf290043078534d3a5a0ea4c840eba84}
+
+#### `public midi_three_byte_func_t `[`input_aftertouch_callback`](docs/api_midi_device.md#struct__midi__device_1acb0b4901c545cec4b28b126f2d8c315f) {#struct__midi__device_1acb0b4901c545cec4b28b126f2d8c315f}
+
+#### `public midi_three_byte_func_t `[`input_pitchbend_callback`](docs/api_midi_device.md#struct__midi__device_1a305fea672caeb996f2233bf8cd2bef18) {#struct__midi__device_1a305fea672caeb996f2233bf8cd2bef18}
+
+#### `public midi_three_byte_func_t `[`input_songposition_callback`](docs/api_midi_device.md#struct__midi__device_1a5f3f13638b3fef3fc561ed1bf301d586) {#struct__midi__device_1a5f3f13638b3fef3fc561ed1bf301d586}
+
+#### `public midi_two_byte_func_t `[`input_progchange_callback`](docs/api_midi_device.md#struct__midi__device_1adaf1da617c9a10a9dcad00ab1959d3da) {#struct__midi__device_1adaf1da617c9a10a9dcad00ab1959d3da}
+
+#### `public midi_two_byte_func_t `[`input_chanpressure_callback`](docs/api_midi_device.md#struct__midi__device_1ab7ca2925c539915d43974eff604d85f7) {#struct__midi__device_1ab7ca2925c539915d43974eff604d85f7}
+
+#### `public midi_two_byte_func_t `[`input_songselect_callback`](docs/api_midi_device.md#struct__midi__device_1a89bed8a5a55376120cfc0a62b42f057f) {#struct__midi__device_1a89bed8a5a55376120cfc0a62b42f057f}
+
+#### `public midi_two_byte_func_t `[`input_tc_quarterframe_callback`](docs/api_midi_device.md#struct__midi__device_1ad9813e75d22e284f9f65a907d20600f0) {#struct__midi__device_1ad9813e75d22e284f9f65a907d20600f0}
+
+#### `public midi_one_byte_func_t `[`input_realtime_callback`](docs/api_midi_device.md#struct__midi__device_1a9448eba4afb7e43650434748db3777be) {#struct__midi__device_1a9448eba4afb7e43650434748db3777be}
+
+#### `public midi_one_byte_func_t `[`input_tunerequest_callback`](docs/api_midi_device.md#struct__midi__device_1a0cb8fd53e00cf1d4202d4fa04d038e8d) {#struct__midi__device_1a0cb8fd53e00cf1d4202d4fa04d038e8d}
+
+#### `public midi_sysex_func_t `[`input_sysex_callback`](docs/api_midi_device.md#struct__midi__device_1afff9a0ce641762aaef24c1e6953ec9a2) {#struct__midi__device_1afff9a0ce641762aaef24c1e6953ec9a2}
+
+#### `public midi_var_byte_func_t `[`input_fallthrough_callback`](docs/api_midi_device.md#struct__midi__device_1abb974ec6d734001b4a0e370f292be503) {#struct__midi__device_1abb974ec6d734001b4a0e370f292be503}
+
+#### `public midi_var_byte_func_t `[`input_catchall_callback`](docs/api_midi_device.md#struct__midi__device_1aae0d535129d4fd650edc98eb3f7584f8) {#struct__midi__device_1aae0d535129d4fd650edc98eb3f7584f8}
+
+#### `public midi_no_byte_func_t `[`pre_input_process_callback`](docs/api_midi_device.md#struct__midi__device_1aeb0bb8923d66c23d874e177dc4265754) {#struct__midi__device_1aeb0bb8923d66c23d874e177dc4265754}
+
+#### `public uint8_t `[`input_buffer`](docs/api_midi_device.md#struct__midi__device_1a7c5684857d6af4ebc4dc12da27bd6b2a) {#struct__midi__device_1a7c5684857d6af4ebc4dc12da27bd6b2a}
+
+#### `public input_state_t `[`input_state`](docs/api_midi_device.md#struct__midi__device_1a69a687d2d1c449ec15a11c07a5722e39) {#struct__midi__device_1a69a687d2d1c449ec15a11c07a5722e39}
+
+#### `public uint16_t `[`input_count`](docs/api_midi_device.md#struct__midi__device_1a68dea8e7b6151e89c85c95caa612ee5d) {#struct__midi__device_1a68dea8e7b6151e89c85c95caa612ee5d}
+
+#### `public uint8_t `[`input_queue_data`](docs/api_midi_device.md#struct__midi__device_1ada41de021135dc423abedcbb30f366ff) {#struct__midi__device_1ada41de021135dc423abedcbb30f366ff}
+
+#### `public `[`byteQueue_t`](#structbyte_queue__t)` `[`input_queue`](#struct__midi__device_1a49c8538a8a02193c58e28a56eb695d8f) {#struct__midi__device_1a49c8538a8a02193c58e28a56eb695d8f}
+
diff --git a/docs/internals/midi_device_setup_process.md b/docs/internals/midi_device_setup_process.md
new file mode 100644
index 0000000000..ae82197c5c
--- /dev/null
+++ b/docs/internals/midi_device_setup_process.md
@@ -0,0 +1,31 @@
+# group `midi_device_setup_process` {#group__midi__device__setup__process}
+
+These are method that you must use to initialize and run a device.
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public void `[`midi_device_init`](#group__midi__device__setup__process_1gaf29deddc94ea98a59daa0bde1aefd9d9)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Initialize a device.
+`public void `[`midi_device_process`](#group__midi__device__setup__process_1gaa3d5993d0e998a1b59bbf5ab9c7b492b)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Process input data.
+
+## Members
+
+#### `public void `[`midi_device_init`](#group__midi__device__setup__process_1gaf29deddc94ea98a59daa0bde1aefd9d9)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__midi__device__setup__process_1gaf29deddc94ea98a59daa0bde1aefd9d9}
+
+Initialize a device.
+
+You must call this before using the device in question.
+
+#### Parameters
+* `device` the device to initialize
+
+#### `public void `[`midi_device_process`](#group__midi__device__setup__process_1gaa3d5993d0e998a1b59bbf5ab9c7b492b)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__midi__device__setup__process_1gaa3d5993d0e998a1b59bbf5ab9c7b492b}
+
+Process input data.
+
+This method drives the input processing, you must call this method frequently if you expect to have your input callbacks called.
+
+#### Parameters
+* `device` the device to process
+
diff --git a/docs/internals/midi_util.md b/docs/internals/midi_util.md
new file mode 100644
index 0000000000..97821bd180
--- /dev/null
+++ b/docs/internals/midi_util.md
@@ -0,0 +1,54 @@
+# group `midi_util` {#group__midi__util}
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`enum `[`midi_packet_length_t`](#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e)            | An enumeration of the possible packet length values.
+`public bool `[`midi_is_statusbyte`](#group__midi__util_1ga12e3b42ff9cbb4b4f2bc455fc8743ee5)`(uint8_t theByte)`            | Test to see if the byte given is a status byte.
+`public bool `[`midi_is_realtime`](#group__midi__util_1gad2f52c363e34a8000d80c983c324e2d7)`(uint8_t theByte)`            | Test to see if the byte given is a realtime message.
+`public `[`midi_packet_length_t`](#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e)` `[`midi_packet_length`](#group__midi__util_1gaa168b43af6ae9de0debce1625e4b8175)`(uint8_t status)`            | Find the length of the packet associated with the status byte given.
+
+## Members
+
+#### `enum `[`midi_packet_length_t`](#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e) {#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e}
+
+ Values                         | Descriptions                                
+--------------------------------|---------------------------------------------
+UNDEFINED            | 
+ONE            | 
+TWO            | 
+THREE            | 
+
+An enumeration of the possible packet length values.
+
+#### `public bool `[`midi_is_statusbyte`](#group__midi__util_1ga12e3b42ff9cbb4b4f2bc455fc8743ee5)`(uint8_t theByte)` {#group__midi__util_1ga12e3b42ff9cbb4b4f2bc455fc8743ee5}
+
+Test to see if the byte given is a status byte.
+
+#### Parameters
+* `theByte` the byte to test 
+
+#### Returns
+true if the byte given is a midi status byte
+
+#### `public bool `[`midi_is_realtime`](#group__midi__util_1gad2f52c363e34a8000d80c983c324e2d7)`(uint8_t theByte)` {#group__midi__util_1gad2f52c363e34a8000d80c983c324e2d7}
+
+Test to see if the byte given is a realtime message.
+
+#### Parameters
+* `theByte` the byte to test 
+
+#### Returns
+true if it is a realtime message, false otherwise
+
+#### `public `[`midi_packet_length_t`](#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e)` `[`midi_packet_length`](#group__midi__util_1gaa168b43af6ae9de0debce1625e4b8175)`(uint8_t status)` {#group__midi__util_1gaa168b43af6ae9de0debce1625e4b8175}
+
+Find the length of the packet associated with the status byte given.
+
+#### Parameters
+* `status` the status byte 
+
+#### Returns
+the length of the packet, will return UNDEFINED if the byte is not a status byte or if it is a sysex status byte
+
diff --git a/docs/internals/send_functions.md b/docs/internals/send_functions.md
new file mode 100644
index 0000000000..b331508008
--- /dev/null
+++ b/docs/internals/send_functions.md
@@ -0,0 +1,241 @@
+# group `send_functions` {#group__send__functions}
+
+These are the functions you use to send midi data through a device.
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public void `[`midi_send_cc`](#group__send__functions_1gaaf884811c92df405ca8fe1a00082f960)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t val)`            | Send a control change message (cc) via the given device.
+`public void `[`midi_send_noteon`](#group__send__functions_1ga467bcf46dbf03ec269ce565b46bc2775)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t vel)`            | Send a note on message via the given device.
+`public void `[`midi_send_noteoff`](#group__send__functions_1gaedb7d8805425eef5d47d57ddcb4c7a49)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t vel)`            | Send a note off message via the given device.
+`public void `[`midi_send_aftertouch`](#group__send__functions_1ga0014847571317a0e34b2ef46a6bc584f)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t note_num,uint8_t amt)`            | Send an after touch message via the given device.
+`public void `[`midi_send_pitchbend`](#group__send__functions_1gae5a4a1e71611e7534be80af9ce3d3491)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,int16_t amt)`            | Send a pitch bend message via the given device.
+`public void `[`midi_send_programchange`](#group__send__functions_1ga7b15588ef25e5e1ff09c2afc3151ce86)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num)`            | Send a program change message via the given device.
+`public void `[`midi_send_channelpressure`](#group__send__functions_1gaf23e69fdf812e89c0036f51f88ab2e1b)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t amt)`            | Send a channel pressure message via the given device.
+`public void `[`midi_send_clock`](#group__send__functions_1ga4e1b11a7cdb0875f6e03ce7c79c581aa)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a clock message via the given device.
+`public void `[`midi_send_tick`](#group__send__functions_1ga2b43c7d433d940c5b907595aac947972)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a tick message via the given device.
+`public void `[`midi_send_start`](#group__send__functions_1ga1569749a8d58ccc56789289d7c7245cc)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a start message via the given device.
+`public void `[`midi_send_continue`](#group__send__functions_1gaed5dc29d754a27372e89ab8bc20ee120)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a continue message via the given device.
+`public void `[`midi_send_stop`](#group__send__functions_1ga026e1a620276cb653ac501aa0d12a988)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a stop message via the given device.
+`public void `[`midi_send_activesense`](#group__send__functions_1ga9b6e4c6ce4719d2604187b325620db37)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send an active sense message via the given device.
+`public void `[`midi_send_reset`](#group__send__functions_1ga3671e39a6d93ca9568fc493001af1b1b)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a reset message via the given device.
+`public void `[`midi_send_tcquarterframe`](#group__send__functions_1ga5b85639910eec280bb744c934d0fd45a)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t time)`            | Send a tc quarter frame message via the given device.
+`public void `[`midi_send_songposition`](#group__send__functions_1gab1c9eeef3b57a8cd2e6128d18e85eb7f)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t pos)`            | Send a song position message via the given device.
+`public void `[`midi_send_songselect`](#group__send__functions_1ga42de7838ba70d949af9a50f9facc3c50)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t song)`            | Send a song select message via the given device.
+`public void `[`midi_send_tunerequest`](#group__send__functions_1ga8db6c7e04d48e4d2266dd59118ca0656)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a tune request message via the given device.
+`public void `[`midi_send_byte`](#group__send__functions_1ga857e85eb90b288385642d4d991e09881)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t b)`            | Send a byte via the given device.
+`public void `[`midi_send_data`](#group__send__functions_1ga36e2f2e45369d911b76969361679054b)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t count,uint8_t byte0,uint8_t byte1,uint8_t byte2)`            | Send up to 3 bytes of data.
+`public void `[`midi_send_array`](#group__send__functions_1ga245243cb1da18d2cea18d4b18d846ead)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t count,uint8_t * array)`            | Send an array of formatted midi data.
+
+## Members
+
+#### `public void `[`midi_send_cc`](#group__send__functions_1gaaf884811c92df405ca8fe1a00082f960)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t val)` {#group__send__functions_1gaaf884811c92df405ca8fe1a00082f960}
+
+Send a control change message (cc) via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `num` the cc num 
+
+* `val` the value of that cc num
+
+#### `public void `[`midi_send_noteon`](#group__send__functions_1ga467bcf46dbf03ec269ce565b46bc2775)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t vel)` {#group__send__functions_1ga467bcf46dbf03ec269ce565b46bc2775}
+
+Send a note on message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `num` the note number 
+
+* `vel` the note velocity
+
+#### `public void `[`midi_send_noteoff`](#group__send__functions_1gaedb7d8805425eef5d47d57ddcb4c7a49)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t vel)` {#group__send__functions_1gaedb7d8805425eef5d47d57ddcb4c7a49}
+
+Send a note off message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `num` the note number 
+
+* `vel` the note velocity
+
+#### `public void `[`midi_send_aftertouch`](#group__send__functions_1ga0014847571317a0e34b2ef46a6bc584f)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t note_num,uint8_t amt)` {#group__send__functions_1ga0014847571317a0e34b2ef46a6bc584f}
+
+Send an after touch message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `note_num` the note number 
+
+* `amt` the after touch amount
+
+#### `public void `[`midi_send_pitchbend`](#group__send__functions_1gae5a4a1e71611e7534be80af9ce3d3491)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,int16_t amt)` {#group__send__functions_1gae5a4a1e71611e7534be80af9ce3d3491}
+
+Send a pitch bend message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `amt` the bend amount range: -8192..8191, 0 means no bend
+
+#### `public void `[`midi_send_programchange`](#group__send__functions_1ga7b15588ef25e5e1ff09c2afc3151ce86)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num)` {#group__send__functions_1ga7b15588ef25e5e1ff09c2afc3151ce86}
+
+Send a program change message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `num` the program to change to
+
+#### `public void `[`midi_send_channelpressure`](#group__send__functions_1gaf23e69fdf812e89c0036f51f88ab2e1b)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t amt)` {#group__send__functions_1gaf23e69f