From e528087ee539fda2f13795d4a6c03403faef44d5 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Thu, 20 Aug 2015 00:42:08 -0400 Subject: midi --- protocol/lufa/lufa.c | 191 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 189 insertions(+), 2 deletions(-) (limited to 'protocol/lufa/lufa.c') diff --git a/protocol/lufa/lufa.c b/protocol/lufa/lufa.c index cdfc7bc6a..d4c8eb169 100644 --- a/protocol/lufa/lufa.c +++ b/protocol/lufa/lufa.c @@ -52,6 +52,7 @@ #include "descriptor.h" #include "lufa.h" + uint8_t keyboard_idle = 0; uint8_t keyboard_protocol = 1; static uint8_t keyboard_led_stats = 0; @@ -65,14 +66,51 @@ static void send_keyboard(report_keyboard_t *report); static void send_mouse(report_mouse_t *report); static void send_system(uint16_t data); static void send_consumer(uint16_t data); +void usb_send_func(MidiDevice * device, uint16_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2); +void usb_get_midi(MidiDevice * device); +void midi_usb_init(MidiDevice * device); host_driver_t lufa_driver = { keyboard_leds, send_keyboard, send_mouse, send_system, - send_consumer + send_consumer, + usb_send_func, + usb_get_midi, + midi_usb_init +}; + +void SetupHardware(void); + +USB_ClassInfo_MIDI_Device_t USB_MIDI_Interface = +{ + .Config = + { + .StreamingInterfaceNumber = 1, + .DataINEndpoint = + { + .Address = (ENDPOINT_DIR_IN | MIDI_STREAM_IN_EPNUM), + .Size = MIDI_STREAM_EPSIZE, + .Banks = 1, + }, + .DataOUTEndpoint = + { + .Address = (ENDPOINT_DIR_OUT | MIDI_STREAM_OUT_EPNUM), + .Size = MIDI_STREAM_EPSIZE, + .Banks = 1, + }, + }, }; +#define SYSEX_START_OR_CONT 0x40 +#define SYSEX_ENDS_IN_1 0x50 +#define SYSEX_ENDS_IN_2 0x60 +#define SYSEX_ENDS_IN_3 0x70 + +#define SYS_COMMON_1 0x50 +#define SYS_COMMON_2 0x20 +#define SYS_COMMON_3 0x30 + /******************************************************************************* * Console @@ -240,8 +278,13 @@ void EVENT_USB_Device_ConfigurationChanged(void) ConfigSuccess &= ENDPOINT_CONFIG(NKRO_IN_EPNUM, EP_TYPE_INTERRUPT, ENDPOINT_DIR_IN, NKRO_EPSIZE, ENDPOINT_BANK_SINGLE); #endif + + + ConfigSuccess &= MIDI_Device_ConfigureEndpoints(&USB_MIDI_Interface); } + + /* Appendix G: HID Request Support Requirements @@ -263,6 +306,8 @@ void EVENT_USB_Device_ControlRequest(void) uint8_t* ReportData = NULL; uint8_t ReportSize = 0; + MIDI_Device_ProcessControlRequest(&USB_MIDI_Interface); + /* Handle HID Class specific requests */ switch (USB_ControlRequest.bRequest) { @@ -541,10 +586,109 @@ int8_t sendchar(uint8_t c) #endif + + + +void usb_send_func(MidiDevice * device, uint16_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2) { + MIDI_EventPacket_t event; + event.Data1 = byte0; + event.Data2 = byte1; + event.Data3 = byte2; + + //if the length is undefined we assume it is a SYSEX message + if (midi_packet_length(byte0) == UNDEFINED) { + switch(cnt) { + case 3: + if (byte2 == SYSEX_END) + event.Event = MIDI_EVENT(0, SYSEX_ENDS_IN_3); + else + event.Event = MIDI_EVENT(0, SYSEX_START_OR_CONT); + break; + case 2: + if (byte1 == SYSEX_END) + event.Event = MIDI_EVENT(0, SYSEX_ENDS_IN_2); + else + event.Event = MIDI_EVENT(0, SYSEX_START_OR_CONT); + break; + case 1: + if (byte0 == SYSEX_END) + event.Event = MIDI_EVENT(0, SYSEX_ENDS_IN_1); + else + event.Event = MIDI_EVENT(0, SYSEX_START_OR_CONT); + break; + default: + return; //invalid cnt + } + } else { + //deal with 'system common' messages + //TODO are there any more? + switch(byte0 & 0xF0){ + case MIDI_SONGPOSITION: + event.Event = MIDI_EVENT(0, SYS_COMMON_3); + break; + case MIDI_SONGSELECT: + case MIDI_TC_QUARTERFRAME: + event.Event = MIDI_EVENT(0, SYS_COMMON_2); + break; + default: + event.Event = MIDI_EVENT(0, byte0); + break; + } + } + + MIDI_Device_SendEventPacket(&USB_MIDI_Interface, &event); + MIDI_Device_Flush(&USB_MIDI_Interface); + MIDI_Device_USBTask(&USB_MIDI_Interface); + USB_USBTask(); +} + +void usb_get_midi(MidiDevice * device) { + MIDI_EventPacket_t event; + while (MIDI_Device_ReceiveEventPacket(&USB_MIDI_Interface, &event)) { + + midi_packet_length_t length = midi_packet_length(event.Data1); + uint8_t input[3]; + input[0] = event.Data1; + input[1] = event.Data2; + input[2] = event.Data3; + if (length == UNDEFINED) { + //sysex + if (event.Event == MIDI_EVENT(0, SYSEX_START_OR_CONT) || event.Event == MIDI_EVENT(0, SYSEX_ENDS_IN_3)) { + length = 3; + } else if (event.Event == MIDI_EVENT(0, SYSEX_ENDS_IN_2)) { + length = 2; + } else if(event.Event == MIDI_EVENT(0, SYSEX_ENDS_IN_1)) { + length = 1; + } else { + //XXX what to do? + } + } + + //pass the data to the device input function + if (length != UNDEFINED) + midi_device_input(device, length, input); + } + MIDI_Device_USBTask(&USB_MIDI_Interface); + USB_USBTask(); +} + +void midi_usb_init(MidiDevice * device){ + midi_device_init(device); + midi_device_set_send_func(device, usb_send_func); + midi_device_set_pre_input_process_func(device, usb_get_midi); + + SetupHardware(); + sei(); +} + + + + + /******************************************************************************* * main ******************************************************************************/ -static void SetupHardware(void) +void SetupHardware(void) { /* Disable watchdog if enabled by bootloader/fuses */ MCUSR &= ~(1 << WDRF); @@ -563,12 +707,34 @@ static void SetupHardware(void) print_set_sendchar(sendchar); } +void fallthrough_callback(MidiDevice * device, + uint16_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2); +void cc_callback(MidiDevice * device, + uint8_t chan, uint8_t num, uint8_t val); +void sysex_callback(MidiDevice * device, + uint16_t start, uint8_t length, uint8_t * data); + int main(void) __attribute__ ((weak)); int main(void) { + //setup the device + + midi_device_init(&midi_device); + midi_device_set_send_func(&midi_device, usb_send_func); + midi_device_set_pre_input_process_func(&midi_device, usb_get_midi); + SetupHardware(); sei(); + midi_register_fallthrough_callback(&midi_device, fallthrough_callback); + midi_register_cc_callback(&midi_device, cc_callback); + midi_register_sysex_callback(&midi_device, sysex_callback); + + midi_send_cc(&midi_device, 0, 1, 2); + midi_send_cc(&midi_device, 15, 1, 0); + midi_send_noteon(&midi_device, 0, 64, 127); + midi_send_noteoff(&midi_device, 0, 64, 127); + /* wait for USB startup & debug output */ while (USB_DeviceState != DEVICE_STATE_Configured) { #if defined(INTERRUPT_CONTROL_ENDPOINT) @@ -598,8 +764,29 @@ int main(void) keyboard_task(); + midi_device_process(&midi_device); + #if !defined(INTERRUPT_CONTROL_ENDPOINT) USB_USBTask(); #endif } } + +//echo data back +void fallthrough_callback(MidiDevice * device, + uint16_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2){ + //pass the data back to the device, using the general purpose send data + //function, any bytes after cnt are ignored +} + +void cc_callback(MidiDevice * device, + uint8_t chan, uint8_t num, uint8_t val) { + //sending it back on the next channel + midi_send_cc(device, (chan + 1) % 16, num, val); +} + +void sysex_callback(MidiDevice * device, + uint16_t start, uint8_t length, uint8_t * data) { + for (int i = 0; i < length; i++) + midi_send_cc(device, 15, 0x7F & data[i], 0x7F & (start + i)); +} -- cgit v1.2.3-24-g4f1b