stdio (optionally) directly over USB-CDC instead of UART loopback
This commit is contained in:
parent
acb592ba88
commit
fa576bfd4d
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@ -1,6 +1,7 @@
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option(USE_SYSTEMWIDE_PICOSDK "Use the systemwide Pico SDK instead of relying on the one from a deeply nested Git submodule (OFF by default)" OFF)
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option(PICO_NO_FLASH "Disable writing the compiled program to flash, and only load it to RAM. Useful for testing, but not much else (OFF by default)." OFF)
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option(PICO_COPY_TO_RAM "Run all code in RAM, while the program is also stored on flash. On bootup, everything will be copied to RAM (OFF by default)." OFF)
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option(USE_USBCDC_FOR_STDIO "Export an extra USB-CDC interface for stdio, instead of echoing it to a UART port (and requiring UART loopback for receiving stdio output on a host computer)." OFF)
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set(FAMILY "rp2040" CACHE STRING "Board/MCU family, decides which drivers to use. Set to RP2040 by default.")
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set(BOARD "raspberry_pi_pico" CACHE STRING "Board used, determines the pinout. Defaults to the Raspberry Pi Pico.")
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@ -27,10 +28,14 @@ if(FAMILY STREQUAL "rp2040")
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pico_sdk_init()
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add_executable(${PROJECT})
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include(${TOP}/hw/bsp/${FAMILY}/family.cmake)
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# need uart stdio, usb is busy doing other stuff
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if(USE_USBCDC_FOR_STDIO)
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# we're going to manually implement this case
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pico_enable_stdio_uart(${PROJECT} 0)
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target_compile_definitions(${PROJECT} PUBLIC USE_USBCDC_FOR_STDIO=1 PICO_STDIO_USB=1)
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else()
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pico_enable_stdio_uart(${PROJECT} 1)
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endif()
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pico_enable_stdio_usb(${PROJECT} 0)
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# Example source
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@ -48,7 +53,6 @@ if(FAMILY STREQUAL "rp2040")
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${CMAKE_CURRENT_SOURCE_DIR}/cdc_serprog.c
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${CMAKE_CURRENT_SOURCE_DIR}/rtconf.c
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)
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# Example include
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target_include_directories(${PROJECT} PUBLIC
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${CMAKE_CURRENT_SOURCE_DIR}/
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@ -59,13 +63,34 @@ if(FAMILY STREQUAL "rp2040")
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${CMAKE_CURRENT_SOURCE_DIR}/bsp/default/
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)
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# need to do this AFTER the regular includes, so that our bsp folder can
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# override the tinyusb board.h header
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include(${TOP}/hw/bsp/${FAMILY}/family.cmake) # tinyusb hardware-specific stuff
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# Example defines
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target_compile_definitions(${PROJECT} PUBLIC
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)
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#target_compile_definitions(${PROJECT} PUBLIC
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#)
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target_link_libraries(${PROJECT} pico_stdlib pico_unique_id hardware_spi
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pico_fix_rp2040_usb_device_enumeration)
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if(USE_USBCDC_FOR_STDIO)
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target_sources(${PROJECT} PUBLIC
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${CMAKE_CURRENT_SOURCE_DIR}/bsp/${FAMILY}/cdc_stdio.c
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)
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target_include_directories(${PROJECT} PUBLIC
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${PICO_SDK_PATH}/src/rp2_common/pico_stdio_usb/include/
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)
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# extremely ugly hack to prevent the Pico SDK to declare *its* TinyUSB config
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target_compile_definitions(${PROJECT} PUBLIC
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_PICO_STDIO_USB_TUSB_CONFIG_H=1
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)
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target_link_libraries(${PROJECT} pico_stdio)
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endif()
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pico_add_extra_outputs(${PROJECT})
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else()
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@ -127,7 +127,7 @@ libco is licensed under the [ISC license](https://opensource.org/licenses/ISC)
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separate mode that temporarily disables all other IO protocols
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- [x] UART with CTS/RTS flow control
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- [x] Needs configurable stuff as well, as some UART interfaces won't use this.
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- [ ] Debug interface to send printf stuff directly to USB, instead of having
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- [x] Debug interface to send printf stuff directly to USB, instead of having
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- to use the UART interface as a loopback thing.
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- [ ] I2C support by emulating the I2C Tiny USB
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- [ ] Expose RP2040-internal temperature ADC on I2C-over-USB bus?
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@ -0,0 +1,51 @@
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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021, 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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* This file is part of the TinyUSB stack.
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*/
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#ifndef BOARD_H_
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#define BOARD_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define LED_PIN PICO_DEFAULT_LED_PIN
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#define LED_STATE_ON 1
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// Button pin is BOOTSEL which is flash CS pin
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#define BUTTON_BOOTSEL
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#define BUTTON_STATE_ACTIVE 0
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#ifndef USE_USBCDC_FOR_STDIO
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#define UART_DEV uart0
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#define UART_TX_PIN 0
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#define UART_RX_PIN 1
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* BOARD_H_ */
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@ -0,0 +1,105 @@
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#include <pico/time.h>
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#include <pico/stdio.h>
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#include <pico/stdio/driver.h>
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#include <pico/binary_info.h>
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#include <pico/mutex.h>
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#include <hardware/irq.h>
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#include "tusb.h"
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#include "protocfg.h"
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#ifndef PICO_STDIO_USB_STDOUT_TIMEOUT_US
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#define PICO_STDIO_USB_STDOUT_TIMEOUT_US 500000
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#endif
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// *mostly* the same as the SDK code, *except* we have to explicitely pass the
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// CDC interface number to the tusb functions, making the SDK code itself very
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// non-reusable >__>
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static mutex_t stdio_usb_mutex;
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static void stdio_usb_out_chars(const char* buf, int length) {
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static uint64_t last_avail_time;
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uint32_t owner;
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if (!mutex_try_enter(&stdio_usb_mutex, &owner)) {
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if (owner == get_core_num()) return; // would deadlock otherwise
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mutex_enter_blocking(&stdio_usb_mutex);
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}
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if (tud_cdc_n_connected(CDC_N_STDIO)) {
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for (int i = 0; i < length; ) {
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int n = length - i;
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int avail = tud_cdc_n_write_available(CDC_N_STDIO);
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if (n > avail) n = avail;
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if (n) {
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int n2 = tud_cdc_n_write(CDC_N_STDIO, buf+i, n);
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tud_task();
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tud_cdc_n_write_flush(CDC_N_STDIO);
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i += n2;
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last_avail_time = time_us_64();
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} else {
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tud_task();
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tud_cdc_n_write_flush(CDC_N_STDIO);
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if (!tud_cdc_n_connected(CDC_N_STDIO) ||
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(!tud_cdc_n_write_available(CDC_N_STDIO)
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&& time_us_64() > last_avail_time + PICO_STDIO_USB_STDOUT_TIMEOUT_US)) {
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break;
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}
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}
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}
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} else {
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// reset our timeout
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last_avail_time = 0;
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}
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mutex_exit(&stdio_usb_mutex);
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}
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static int stdio_usb_in_chars(char* buf, int length) {
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uint32_t owner;
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if (!mutex_try_enter(&stdio_usb_mutex, &owner)) {
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if (owner == get_core_num()) return PICO_ERROR_NO_DATA; // would deadlock otherwise
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mutex_enter_blocking(&stdio_usb_mutex);
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}
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int rc = PICO_ERROR_NO_DATA;
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if (tud_cdc_n_connected(CDC_N_STDIO) && tud_cdc_n_available(CDC_N_STDIO)) {
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int count = tud_cdc_n_read(CDC_N_STDIO, buf, length);
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rc = count ? count : PICO_ERROR_NO_DATA;
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}
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mutex_exit(&stdio_usb_mutex);
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return rc;
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}
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extern stdio_driver_t stdio_usb;
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stdio_driver_t stdio_usb = {
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.out_chars = stdio_usb_out_chars,
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. in_chars = stdio_usb_in_chars ,
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#if PICO_STDIO_ENABLE_CRLF_SUPPORT
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.crlf_enabled = PICO_STDIO_DEFAULT_CRLF
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#endif
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};
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bool stdio_usb_init(void) {
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//#if !PICO_NO_BI_STDIO_USB
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bi_decl_if_func_used(bi_program_feature("USB stdin / stdout"));
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//#endif
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mutex_init(&stdio_usb_mutex);
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// unlike with the SDK code, we don't need to add IRQ stuff for the USB
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// task, as our main function handles this automatically
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stdio_set_driver_enabled(&stdio_usb, true);
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return true;
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}
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@ -11,5 +11,9 @@
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#define CDC_N_UART 0
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#define CDC_N_SERPROG 1
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#ifdef USE_USBCDC_FOR_STDIO
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#define CDC_N_STDIO 2
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#endif
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#endif
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8
main.c
8
main.c
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@ -27,6 +27,8 @@
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#include <stdio.h>
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#include <string.h>
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#include "tusb_config.h"
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#include "bsp/board.h" /* a tinyusb header */
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#include "tusb.h"
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@ -95,7 +97,7 @@ int main(void)
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mainthread = co_active();
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// TODO: split this out in a bsp-specific file
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#ifdef PICO_BOARD
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#if defined(PICO_BOARD) && !defined(USE_USBCDC_FOR_STDIO)
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// use hardcoded values from TinyUSB board.h
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bi_decl(bi_2pins_with_func(0, 1, GPIO_FUNC_UART));
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#endif
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@ -117,6 +119,10 @@ int main(void)
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tusb_init();
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#ifdef USE_USBCDC_FOR_STDIO
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stdio_usb_init();
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#endif
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while (1)
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{
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//printf("hi\n");
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10
protos.h
10
protos.h
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@ -2,11 +2,11 @@
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#ifndef PROTOS_H_
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#define PROTOS_H_
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#include <stdbool.h>
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#include "protocfg.h"
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#ifdef DBOARD_HAS_UART
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#include <stdbool.h>
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void cdc_uart_init(void);
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void cdc_uart_task(void);
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@ -18,5 +18,11 @@ void cdc_serprog_init(void);
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void cdc_serprog_task(void);
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#endif
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#ifdef USE_USBCDC_FOR_STDIO
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//#ifndef PICO_BOARD
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bool stdio_usb_init(void);
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//#endif
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#endif
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#endif
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@ -25,6 +25,8 @@ enum serprog_cmd {
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S_CMD_SPIOP = 0x13,
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S_CMD_S_SPI_FREQ = 0x14,
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S_CMD_S_PINSTATE = 0x15,
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S_CMD_MAGIC_SETTINGS = 0x53
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};
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enum serprog_response {
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@ -23,8 +23,8 @@
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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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#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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@ -98,7 +98,12 @@
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#endif
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//------------- CLASS -------------//
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#ifdef USE_USBCDC_FOR_STDIO
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#define CFG_TUD_CDC 3
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#else
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#define CFG_TUD_CDC 2
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#endif
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#define CFG_TUD_MSC 0
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#define CFG_TUD_HID 1
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#define CFG_TUD_MIDI 0
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@ -115,6 +115,11 @@ enum
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ITF_NUM_CDC_SERPROG_DATA,
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#endif
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#ifdef USE_USBCDC_FOR_STDIO
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ITF_NUM_CDC_STDIO_COM,
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ITF_NUM_CDC_STDIO_DATA,
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#endif
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ITF_NUM_TOTAL
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};
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@ -129,6 +134,9 @@ static const int CONFIG_TOTAL_LEN = TUD_CONFIG_DESC_LEN
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#endif
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#ifdef DBOARD_HAS_SERPROG
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+ TUD_CDC_DESC_LEN
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#endif
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#ifdef USE_USBCDC_FOR_STDIO
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+ TUD_CDC_DESC_LEN
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#endif
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;
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@ -139,6 +147,9 @@ static const int CONFIG_TOTAL_LEN = TUD_CONFIG_DESC_LEN
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#define EPNUM_CDC_SERPROG_OUT 0x05 // 7
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#define EPNUM_CDC_SERPROG_IN 0x85 // 8
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#define EPNUM_CDC_SERPROG_NOTIF 0x86 // 6
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#define EPNUM_CDC_STDIO_OUT 0x07
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#define EPNUM_CDC_STDIO_IN 0x87
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#define EPNUM_CDC_STDIO_NOTIF 0x88
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// NOTE: if you modify this table, don't forget to keep tusb_config.h up to date as well!
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uint8_t const desc_configuration[] =
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@ -160,6 +171,11 @@ uint8_t const desc_configuration[] =
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// Interface number, string index, EP notification address and size, EP data address (out, in) and size.
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TUD_CDC_DESCRIPTOR(ITF_NUM_CDC_SERPROG_COM, 0, EPNUM_CDC_SERPROG_NOTIF, 64, EPNUM_CDC_SERPROG_OUT, EPNUM_CDC_SERPROG_IN, 64),
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#endif
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#ifdef USE_USBCDC_FOR_STDIO
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// Interface number, string index, EP notification address and size, EP data address (out, in) and size.
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TUD_CDC_DESCRIPTOR(ITF_NUM_CDC_STDIO_COM, 0, EPNUM_CDC_STDIO_NOTIF, 64, EPNUM_CDC_STDIO_OUT, EPNUM_CDC_STDIO_IN, 64),
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#endif
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};
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// Invoked when received GET CONFIGURATION DESCRIPTOR
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