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SmittyHalibutSmittyHalibut
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Adding CH341 support. Direct copy of hathach#1507 
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‎examples/device/CMakeLists.txt‎

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@@ -34,3 +34,4 @@ family_add_subdirectory(usbtmc)
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family_add_subdirectory(video_capture)
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family_add_subdirectory(video_capture_2ch)
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family_add_subdirectory(webusb_serial)
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family_add_subdirectory(ch341_serial)

‎examples/device/ch341_serial/CMakeLists.txt‎

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cmake_minimum_required(VERSION 3.5)
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include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
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# gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
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family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
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project(${PROJECT})
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# Checks this example is valid for the family and initializes the project
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family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
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add_executable(${PROJECT})
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# Example source
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target_sources(${PROJECT} PUBLIC
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${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
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${CMAKE_CURRENT_SOURCE_DIR}/src/usb_descriptors.c
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)
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# Example include
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target_include_directories(${PROJECT} PUBLIC
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${CMAKE_CURRENT_SOURCE_DIR}/src
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)
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# Configure compilation flags and libraries for the example... see the corresponding function
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# in hw/bsp/FAMILY/family.cmake for details.
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family_configure_device_example(${PROJECT})

‎examples/device/ch341_serial/Makefile‎

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include ../../../tools/top.mk
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include ../../make.mk
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INC += \
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src \
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$(TOP)/hw \
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# Example source
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EXAMPLE_SOURCE += $(wildcard src/*.c)
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SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
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include ../../rules.mk

‎examples/device/ch341_serial/src/main.c‎

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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include "bsp/board.h"
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#include "tusb.h"
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// Change this to 1 and event callback will be logged to stdout
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#define CH341_LOG_EVENTS 0
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#if (CH341_LOG_EVENTS)
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static const char * _par_str[] =
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{
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"N",
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"O",
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"E",
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"M",
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"S"
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};
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#endif
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//------------- prototypes -------------//
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static void ch341_task(void);
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/*------------- MAIN -------------*/
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int main(void)
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{
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board_init();
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// init device stack on configured roothub port
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tud_init(BOARD_TUD_RHPORT);
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while (1)
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{
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tud_task(); // tinyusb device task
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ch341_task();
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}
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return 0;
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}
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// Echo back to terminal
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static void echo_serial_port( uint8_t buf[], uint32_t count)
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{
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tud_ch341_write(buf, count);
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tud_ch341_write_flush();
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}
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//--------------------------------------------------------------------+
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// USB CH341
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//--------------------------------------------------------------------+
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static void ch341_task(void)
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{
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// connected() The serial port has been opened atleast once
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// Will continue to return true even after the serial port is closed.
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if ( tud_ch341_connected())
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{
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if ( tud_ch341_available() )
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{
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uint8_t buf[64];
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uint32_t count = tud_ch341_read(buf, sizeof(buf));
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// echo back to terminal
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echo_serial_port(buf, count);
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}
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}
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}
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// Invoked when DTR/RTS changes
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void tud_ch341_line_state_cb(ch341_line_state_t line_state)
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{
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#if (CH341_LOG_EVENTS)
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printf("DTR=%u, RTS=%u\r\n",
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line_state & CH341_LINE_STATE_DTR_ACTIVE ? 1 : 0,
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line_state & CH341_LINE_STATE_RTS_ACTIVE ? 1 : 0);
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#else
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(void)(line_state);
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#endif
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}
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// Invoked when line coding changes
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void tud_ch341_line_coding_cb(ch341_line_coding_t const* p_line_coding)
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{
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#if (CH341_LOG_EVENTS)
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printf("BITRATE=%lu (%s%u%u) RX:%s TX:%s\r\n",
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(unsigned long)p_line_coding->bit_rate,
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_par_str[p_line_coding->parity],
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p_line_coding->data_bits,
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p_line_coding->stop_bits ? 2 : 1,
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p_line_coding->rx_en ? "ON":"OFF",
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p_line_coding->tx_en ? "ON":"OFF");
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#else
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(void)(p_line_coding);
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#endif
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}
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// Invoked when a break signal is received
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void tud_ch341_send_break_cb(bool is_break_active)
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{
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#if (CH341_LOG_EVENTS)
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printf("RCV BREAK=%s\r\n", is_break_active ? "ON" : "OFF");
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#else
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(void)(is_break_active);
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#endif
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}

‎examples/device/ch341_serial/src/tusb_config.h‎

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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#ifndef _TUSB_CONFIG_H_
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#define _TUSB_CONFIG_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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//--------------------------------------------------------------------+
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// Board Specific Configuration
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//--------------------------------------------------------------------+
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// RHPort number used for device can be defined by board.mk, default to port 0
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#ifndef BOARD_TUD_RHPORT
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#define BOARD_TUD_RHPORT 0
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#endif
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// RHPort max operational speed can defined by board.mk
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#ifndef BOARD_TUD_MAX_SPEED
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#define BOARD_TUD_MAX_SPEED OPT_MODE_DEFAULT_SPEED
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#endif
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//--------------------------------------------------------------------
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// COMMON CONFIGURATION
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//--------------------------------------------------------------------
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// defined by board.mk
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#ifndef CFG_TUSB_MCU
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#error CFG_TUSB_MCU must be defined
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#endif
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#ifndef CFG_TUSB_OS
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#define CFG_TUSB_OS OPT_OS_NONE
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#endif
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#ifndef CFG_TUSB_DEBUG
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#define CFG_TUSB_DEBUG 0
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#endif
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// Enable Device stack
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#define CFG_TUD_ENABLED 1
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// Default is max speed that hardware controller could support with on-chip PHY
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#define CFG_TUD_MAX_SPEED BOARD_TUD_MAX_SPEED
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#ifndef CFG_TUSB_RHPORT0_MODE
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#define CFG_TUSB_RHPORT0_MODE OPT_MODE_DEVICE | OPT_MODE_FULL_SPEED
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#endif
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//--------------------------------------------------------------------
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// DEVICE CONFIGURATION
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//--------------------------------------------------------------------
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#ifndef CFG_TUD_ENDPOINT0_SIZE
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#define CFG_TUD_ENDPOINT0_SIZE 64
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#endif
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//------------- CLASS -------------//
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#define CFG_TUD_CDC 0
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#define CFG_TUD_MSC 0
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#define CFG_TUD_HID 0
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#define CFG_TUD_MIDI 0
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#define CFG_TUD_VENDOR 0
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#define CFG_TUD_CH341 1
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// CH341 Endpoint max packet sizes (should not change)
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#define CFG_TUD_CH341_EP_RX_MAX_PACKET (TUD_OPT_HIGH_SPEED ? 512 : 64)
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#define CFG_TUD_CH341_EP_TX_MAX_PACKET CFG_TUD_CH341_EP_RX_MAX_PACKET
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#define CFG_TUD_CH341_EP_TXNOTIFY_MAX_PACKET (8)
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// CH341 buffer size for TX and RX data (must be an interval of max packet size)
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// more is faster
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#define CFG_TUD_CH341_FIFO_SIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
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#ifdef __cplusplus
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}
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#endif
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#endif /* _TUSB_CONFIG_H_ */

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