From 106084289dec0146c117fad69925696b388509be Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 6 Apr 2023 11:15:57 +0700
Subject: [PATCH 1/2] add define for vendor_flush() to write_flush() for
 backward compatible

---
 src/class/vendor/vendor_device.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/class/vendor/vendor_device.h b/src/class/vendor/vendor_device.h
index 7afd49cc1..d239406b4 100644
--- a/src/class/vendor/vendor_device.h
+++ b/src/class/vendor/vendor_device.h
@@ -52,7 +52,9 @@ uint32_t tud_vendor_n_write_flush     (uint8_t itf);
 uint32_t tud_vendor_n_write_available (uint8_t itf);
 
 static inline uint32_t tud_vendor_n_write_str (uint8_t itf, char const* str);
-uint32_t tud_vendor_n_flush           (uint8_t itf);
+
+// backward compatible
+#define tud_vendor_n_flush(itf) tud_vendor_n_write_flush(itf)
 
 //--------------------------------------------------------------------+
 // Application API (Single Port)
@@ -67,6 +69,9 @@ static inline uint32_t tud_vendor_write_str       (char const* str);
 static inline uint32_t tud_vendor_write_available (void);
 static inline uint32_t tud_vendor_write_flush     (void);
 
+// backward compatible
+#define tud_vendor_flush() tud_vendor_write_flush()
+
 //--------------------------------------------------------------------+
 // Application Callback API (weak is optional)
 //--------------------------------------------------------------------+

From 6db24e0dbae248c865ec3ed0e5febcf341b489d4 Mon Sep 17 00:00:00 2001
From: hathach <thach@tinyusb.org>
Date: Thu, 6 Apr 2023 11:16:28 +0700
Subject: [PATCH 2/2] implement tuh_hid_receive_ready() and
 tuh_hid_send_ready()

---
 src/class/hid/hid_host.c | 23 ++++++++++++++++-------
 src/class/hid/hid_host.h |  9 ++++++---
 2 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/src/class/hid/hid_host.c b/src/class/hid/hid_host.c
index a0032aeba..d95d3ef35 100644
--- a/src/class/hid/hid_host.c
+++ b/src/class/hid/hid_host.c
@@ -331,6 +331,15 @@ static bool _hidh_set_idle(uint8_t daddr, uint8_t itf_num, uint16_t idle_rate, t
 // Interrupt Endpoint API
 //--------------------------------------------------------------------+
 
+// Check if HID interface is ready to receive report
+bool tuh_hid_receive_ready(uint8_t dev_addr, uint8_t idx)
+{
+  hidh_interface_t* p_hid = get_hid_itf(dev_addr, idx);
+  TU_VERIFY(p_hid);
+
+  return !usbh_edpt_busy(dev_addr, p_hid->ep_in);
+}
+
 bool tuh_hid_receive_report(uint8_t daddr, uint8_t idx)
 {
   hidh_interface_t* p_hid = get_hid_itf(daddr, idx);
@@ -348,13 +357,13 @@ bool tuh_hid_receive_report(uint8_t daddr, uint8_t idx)
   return true;
 }
 
-//bool tuh_n_hid_n_ready(uint8_t dev_addr, uint8_t instance)
-//{
-//  TU_VERIFY(tuh_n_hid_n_mounted(dev_addr, instance));
-//
-//  hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
-//  return !usbh_edpt_busy(dev_addr, hid_itf->ep_in);
-//}
+bool tuh_hid_send_ready(uint8_t dev_addr, uint8_t idx)
+{
+  hidh_interface_t* p_hid = get_hid_itf(dev_addr, idx);
+  TU_VERIFY(p_hid);
+
+  return !usbh_edpt_busy(dev_addr, p_hid->ep_out);
+}
 
 bool tuh_hid_send_report(uint8_t daddr, uint8_t idx, uint8_t report_id, const void* report, uint16_t len)
 {
diff --git a/src/class/hid/hid_host.h b/src/class/hid/hid_host.h
index c0c727e6a..08ad421d2 100644
--- a/src/class/hid/hid_host.h
+++ b/src/class/hid/hid_host.h
@@ -62,7 +62,7 @@ typedef struct
 // Interface API
 //--------------------------------------------------------------------+
 
-// Get the number of mounted HID interfaces of a device
+// Get the total number of mounted HID interfaces of a device
 uint8_t tuh_hid_itf_get_count(uint8_t dev_addr);
 
 // Get all mounted interfaces across devices
@@ -109,14 +109,17 @@ bool tuh_hid_set_report(uint8_t dev_addr, uint8_t idx, uint8_t report_id, uint8_
 // Interrupt Endpoint API
 //--------------------------------------------------------------------+
 
-// Check if the interface is ready to use
-//bool tuh_n_hid_n_ready(uint8_t dev_addr, uint8_t idx);
+// Check if HID interface is ready to receive report
+bool tuh_hid_receive_ready(uint8_t dev_addr, uint8_t idx);
 
 // Try to receive next report on Interrupt Endpoint. Immediately return
 // - true If succeeded, tuh_hid_report_received_cb() callback will be invoked when report is available
 // - false if failed to queue the transfer e.g endpoint is busy
 bool tuh_hid_receive_report(uint8_t dev_addr, uint8_t idx);
 
+// Check if HID interface is ready to send report
+bool tuh_hid_send_ready(uint8_t dev_addr, uint8_t idx);
+
 // Send report using interrupt endpoint
 // If report_id > 0 (composite), it will be sent as 1st byte, then report contents. Otherwise only report content is sent.
 bool tuh_hid_send_report(uint8_t dev_addr, uint8_t idx, uint8_t report_id, const void* report, uint16_t len);