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Add tud_midi_n_tx_avaiable interface created for easier flow control #3659

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Add tud_midi_n_tx_avaiable interface created for easier flow control #3659

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4c0d9de
SUKU tud_midi_n_tx_avaiable interface created for easier flow control
SukuWc Jun 1, 2026
975c481
SUKU rx_available interface created
SukuWc Jun 1, 2026
b935f3f
SUKU midi_n_available usage updated
SukuWc Jun 15, 2026
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10 changes: 10 additions & 0 deletions src/class/midi/midi_device.c
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Original file line number Diff line number Diff line change
Expand Up @@ -294,6 +294,16 @@ bool tud_midi_n_packet_write (uint8_t itf, const uint8_t packet[4]) {
return true;
}

uint32_t tud_midi_n_tx_available(uint8_t itf) {
midid_interface_t *p_midi = &_midid_itf[itf];
tu_edpt_stream_t *ep_str = &p_midi->ep_stream.tx;
return tu_edpt_stream_write_available(p_midi->rhport, ep_str);
}

uint32_t tud_midi_n_rx_available(uint8_t itf) {
return tud_midi_n_available(itf, 0);
}

uint32_t tud_midi_n_packet_write_n(uint8_t itf, const uint8_t packets[], uint32_t n_packets) {
midid_interface_t *p_midi = &_midid_itf[itf];
tu_edpt_stream_t *ep_str = &p_midi->ep_stream.tx;
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14 changes: 14 additions & 0 deletions src/class/midi/midi_device.h
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Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,12 @@ bool tud_midi_n_packet_write(uint8_t itf, const uint8_t packet[4]);
// Write multiple event packets, return number of written packets
uint32_t tud_midi_n_packet_write_n(uint8_t itf, const uint8_t packets[], uint32_t n_packets);

// Get the number of bytes available for writing
uint32_t tud_midi_n_tx_available(uint8_t itf);

// Get the number of bytes available for reading
uint32_t tud_midi_n_rx_available(uint8_t itf);

//--------------------------------------------------------------------+
// Application API (Single Interface)
//--------------------------------------------------------------------+
Expand Down Expand Up @@ -117,6 +123,14 @@ TU_ATTR_ALWAYS_INLINE static inline uint32_t tud_midi_packet_write_n(const uint8
return tud_midi_n_packet_write_n(0, packets, n_packets);
}

TU_ATTR_ALWAYS_INLINE static inline uint32_t tud_midi_tx_available(void) {
return tud_midi_n_tx_available(0);
}

TU_ATTR_ALWAYS_INLINE static inline uint32_t tud_midi_rx_available(void) {
return tud_midi_n_rx_available(0);
}

//--------------------------------------------------------------------+
// Internal Class Driver API
//--------------------------------------------------------------------+
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