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Added MidiHost class, major refactor.
MidiHost owns and manages; - USBH_Handle (usbhost/phost), and its state change callback - MidiStreamingHandle - USBH_ClassTypeDef (operations and pData ptr to MidiStreamingHandle) It also sets up the OTG interrupt. It provides wrappers for Midi Host functions (start/stop/rx/tx) It's not 100% there yet, but close to supporting multiple MidiHosts (i.e. on different USB ports)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| #pragma once | ||
| #include "drivers/interrupt.hh" | ||
| #include "drivers/interrupt_control.hh" | ||
| #include "usbh_midi.hh" | ||
|
|
||
| class MidiHost { | ||
| public: | ||
| static inline uint8_t rx_buffer[128]; | ||
|
|
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| MidiStreamingHandle MSHandle; | ||
| USBH_HandleTypeDef usbhost; | ||
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| USBH_ClassTypeDef midi_class_ops = { | ||
| "MIDI", | ||
| AudioClassCode, | ||
| USBH_MIDI_InterfaceInit, | ||
| USBH_MIDI_InterfaceDeInit, | ||
| USBH_MIDI_ClassRequest, | ||
| USBH_MIDI_Process, | ||
| USBH_MIDI_SOFProcess, | ||
| &MSHandle, | ||
| }; | ||
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| MidiHost() = default; | ||
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| void set_rx_callback(MidiStreamRxCallbackType rx_callback) { MSHandle.rx_callback = rx_callback; } | ||
| void set_tx_callback(MidiStreamTxCallbackType tx_callback) { MSHandle.tx_callback = tx_callback; } | ||
|
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| bool init() | ||
| { | ||
| auto status = USBH_Init(&usbhost, usbh_state_change_callback, 0); | ||
| if (status != USBH_OK) | ||
| return false; | ||
|
|
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| // defined in usbh_conf.c | ||
| extern HCD_HandleTypeDef hhcd; | ||
| InterruptControl::disable_irq(OTG_IRQn); | ||
| InterruptManager::registerISR(OTG_IRQn, [] { HAL_HCD_IRQHandler(&hhcd); }); | ||
| InterruptControl::set_irq_priority(OTG_IRQn, 0, 0); | ||
| InterruptControl::enable_irq(OTG_IRQn); | ||
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| USBH_RegisterClass(&usbhost, &midi_class_ops); | ||
|
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| return true; | ||
| } | ||
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| bool start() { return USBH_Start(&usbhost) == USBH_OK; } | ||
| bool stop() { return USBH_Stop(&usbhost) == USBH_OK; } | ||
| void process() { USBH_Process(&usbhost); } | ||
| USBH_StatusTypeDef receive() { return USBH_MIDI_Receive(&usbhost, rx_buffer, 128); } | ||
| USBH_StatusTypeDef transmit(uint8_t *buff, uint32_t len) { return USBH_MIDI_Transmit(&usbhost, buff, len); } | ||
|
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| static void usbh_state_change_callback(USBH_HandleTypeDef *phost, uint8_t id) | ||
| { | ||
| switch (id) { | ||
| case HOST_USER_SELECT_CONFIGURATION: | ||
| printf("Select config\n"); | ||
| break; | ||
|
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| case HOST_USER_CONNECTION: | ||
| printf("Connected\n"); | ||
| break; | ||
|
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| case HOST_USER_CLASS_SELECTED: | ||
| printf("Class selected\n"); | ||
| break; | ||
|
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| case HOST_USER_CLASS_ACTIVE: | ||
| printf("Class active\n"); | ||
| // TODO: Move rx_buffer to class handle, to support multiple instances | ||
| USBH_MIDI_Receive(phost, rx_buffer, 128); | ||
| break; | ||
|
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| case HOST_USER_DISCONNECTION: | ||
| printf("Disconnected\n"); | ||
| break; | ||
|
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| case HOST_USER_UNRECOVERED_ERROR: | ||
| printf("Error\n"); | ||
| break; | ||
| } | ||
| } | ||
| }; |
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