From 1786aea78e0f7b6949a5a73e5a82623dde76579f Mon Sep 17 00:00:00 2001
From: Martin Brodbeck <martin@brodbeck-online.de>
Date: Mon, 19 Feb 2024 13:34:38 +0100
Subject: [PATCH] first steps with tinyusb

---
 CMakeLists.txt    |  8 ++++-
 src/tusb_config.h | 86 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 93 insertions(+), 1 deletion(-)
 create mode 100644 src/tusb_config.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 430e256..4d6c72d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,7 +32,7 @@ pico_set_program_name(raspi_keyer "raspi_keyer")
 pico_set_program_version(raspi_keyer "0.0.1")
 
 pico_enable_stdio_uart(raspi_keyer 1)
-pico_enable_stdio_usb(raspi_keyer 1)
+pico_enable_stdio_usb(raspi_keyer 0)
 
 target_compile_options(raspi_keyer PRIVATE -Wall -Wextra -Werror)
 
@@ -46,6 +46,11 @@ target_include_directories(raspi_keyer PRIVATE
   ${CMAKE_CURRENT_LIST_DIR}/.. # for our common lwipopts or any other standard includes, if required
 )
 
+# Make sure TinyUSB can find tusb_config.h
+target_include_directories(raspi_keyer PUBLIC
+  ${CMAKE_CURRENT_LIST_DIR}/src
+)
+
 # Add any user requested libraries
 target_link_libraries(raspi_keyer
   hardware_flash
@@ -53,6 +58,7 @@ target_link_libraries(raspi_keyer
   hardware_pwm
   pico_flash
   pico_multicore
+  tinyusb_device
 )
 
 pico_add_extra_outputs(raspi_keyer)
diff --git a/src/tusb_config.h b/src/tusb_config.h
new file mode 100644
index 0000000..f5986a9
--- /dev/null
+++ b/src/tusb_config.h
@@ -0,0 +1,86 @@
+#ifndef TUSB_CONFIG
+#define TUSB_CONFIG
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
+
+// RHPort number used for device can be defined by board.mk, default to port 0
+#ifndef BOARD_TUD_RHPORT
+#define BOARD_TUD_RHPORT 0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUD_MAX_SPEED
+#define BOARD_TUD_MAX_SPEED OPT_MODE_DEFAULT_SPEED
+#endif
+
+//--------------------------------------------------------------------
+// COMMON CONFIGURATION
+//--------------------------------------------------------------------
+
+// defined by board.mk
+#ifndef CFG_TUSB_MCU
+#error CFG_TUSB_MCU must be defined
+#endif
+
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS OPT_OS_NONE
+#endif
+
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG 0
+#endif
+
+// Enable Device stack
+#define CFG_TUD_ENABLED 1
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUD_MAX_SPEED BOARD_TUD_MAX_SPEED
+
+/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
+ * Tinyusb use follows macros to declare transferring memory so that they can be put
+ * into those specific section.
+ * e.g
+ * - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
+ * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
+ */
+#ifndef CFG_TUSB_MEM_SECTION
+#define CFG_TUSB_MEM_SECTION
+#endif
+
+#ifndef CFG_TUSB_MEM_ALIGN
+#define CFG_TUSB_MEM_ALIGN __attribute__((aligned(4)))
+#endif
+
+//--------------------------------------------------------------------
+// DEVICE CONFIGURATION
+//--------------------------------------------------------------------
+
+#ifndef CFG_TUD_ENDPOINT0_SIZE
+#define CFG_TUD_ENDPOINT0_SIZE 64
+#endif
+
+//------------- CLASS -------------//
+#define CFG_TUD_CDC 2
+#define CFG_TUD_MSC 0
+#define CFG_TUD_HID 0
+#define CFG_TUD_MIDI 0
+#define CFG_TUD_VENDOR 0
+
+// CDC FIFO size of TX and RX
+#define CFG_TUD_CDC_RX_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
+#define CFG_TUD_CDC_TX_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
+
+// CDC Endpoint transfer buffer size, more is faster
+#define CFG_TUD_CDC_EP_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file