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author | joeycastillo <joeycastillo@utexas.edu> | 2021-08-30 14:42:11 -0400 |
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committer | GitHub <noreply@github.com> | 2021-08-30 14:42:11 -0400 |
commit | eb3d9b26cbda2d2612f11eb39843b221224f1fa7 (patch) | |
tree | 7a514b4d21dd0d2a324a5e1313a144f26bf20799 /tinyusb/examples/device/dynamic_configuration/src/main.c | |
parent | ee9cc322d301631c9ff0751d9bed717c6492b6a5 (diff) | |
parent | b0845cc3f1a8234a30c980eccf10e44765e4e105 (diff) | |
download | Sensor-Watch-eb3d9b26cbda2d2612f11eb39843b221224f1fa7.tar.gz Sensor-Watch-eb3d9b26cbda2d2612f11eb39843b221224f1fa7.tar.bz2 Sensor-Watch-eb3d9b26cbda2d2612f11eb39843b221224f1fa7.zip |
Merge pull request #9 from joeycastillo/usb-refactor
USB refactor / Makefile simplification
Diffstat (limited to 'tinyusb/examples/device/dynamic_configuration/src/main.c')
-rwxr-xr-x | tinyusb/examples/device/dynamic_configuration/src/main.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/tinyusb/examples/device/dynamic_configuration/src/main.c b/tinyusb/examples/device/dynamic_configuration/src/main.c new file mode 100755 index 00000000..4c10f55b --- /dev/null +++ b/tinyusb/examples/device/dynamic_configuration/src/main.c @@ -0,0 +1,217 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2019 Ha Thach (tinyusb.org) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + */ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "bsp/board.h" +#include "tusb.h" + +//--------------------------------------------------------------------+ +// MACRO CONSTANT TYPEDEF PROTYPES +//--------------------------------------------------------------------+ + +/* Blink pattern + * - 250 ms : device not mounted + * - 1000 ms : device mounted + * - 2500 ms : device is suspended + */ +enum { + BLINK_NOT_MOUNTED = 250, + BLINK_MOUNTED = 1000, + BLINK_SUSPENDED = 2500, +}; + +static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED; + +void led_blinking_task(void); +void cdc_task(void); +void midi_task(void); + +/*------------- MAIN -------------*/ +int main(void) +{ + board_init(); + tusb_init(); + + while (1) + { + tud_task(); // tinyusb device task + led_blinking_task(); + cdc_task(); + midi_task(); + } + + return 0; +} + +//--------------------------------------------------------------------+ +// Device callbacks +//--------------------------------------------------------------------+ + +// Invoked when device is mounted +void tud_mount_cb(void) +{ + blink_interval_ms = BLINK_MOUNTED; +} + +// Invoked when device is unmounted +void tud_umount_cb(void) +{ + blink_interval_ms = BLINK_NOT_MOUNTED; +} + +// Invoked when usb bus is suspended +// remote_wakeup_en : if host allow us to perform remote wakeup +// Within 7ms, device must draw an average of current less than 2.5 mA from bus +void tud_suspend_cb(bool remote_wakeup_en) +{ + (void) remote_wakeup_en; + blink_interval_ms = BLINK_SUSPENDED; +} + +// Invoked when usb bus is resumed +void tud_resume_cb(void) +{ + blink_interval_ms = BLINK_MOUNTED; +} + + +//--------------------------------------------------------------------+ +// USB CDC +//--------------------------------------------------------------------+ +void cdc_task(void) +{ + if ( tud_cdc_connected() ) + { + // connected and there are data available + if ( tud_cdc_available() ) + { + uint8_t buf[64]; + + // read and echo back + uint32_t count = tud_cdc_read(buf, sizeof(buf)); + + for(uint32_t i=0; i<count; i++) + { + tud_cdc_write_char(buf[i]); + + if ( buf[i] == '\r' ) tud_cdc_write_char('\n'); + } + + tud_cdc_write_flush(); + } + } +} + +// Invoked when cdc when line state changed e.g connected/disconnected +void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts) +{ + (void) itf; + + // connected + if ( dtr && rts ) + { + // print initial message when connected + tud_cdc_write_str("\r\nTinyUSB CDC MSC device example\r\n"); + } +} + +// Invoked when CDC interface received data from host +void tud_cdc_rx_cb(uint8_t itf) +{ + (void) itf; +} + +//--------------------------------------------------------------------+ +// MIDI Task +//--------------------------------------------------------------------+ + +// Variable that holds the current position in the sequence. +uint32_t note_pos = 0; + +// Store example melody as an array of note values +static const uint8_t note_sequence[] = +{ + 74,78,81,86,90,93,98,102,57,61,66,69,73,78,81,85,88,92,97,100,97,92,88,85,81,78, + 74,69,66,62,57,62,66,69,74,78,81,86,90,93,97,102,97,93,90,85,81,78,73,68,64,61, + 56,61,64,68,74,78,81,86,90,93,98,102 +}; + +void midi_task(void) +{ + static uint32_t start_ms = 0; + + uint8_t const cable_num = 0; // MIDI jack associated with USB endpoint + uint8_t const channel = 0; // 0 for channel 1 + + // The MIDI interface always creates input and output port/jack descriptors + // regardless of these being used or not. Therefore incoming traffic should be read + // (possibly just discarded) to avoid the sender blocking in IO + uint8_t packet[4]; + while( tud_midi_available() ) tud_midi_packet_read(packet); + + // send note every 1000 ms + if (board_millis() - start_ms < 286) return; // not enough time + start_ms += 286; + + // Previous positions in the note sequence. + int previous = note_pos - 1; + + // If we currently are at position 0, set the + // previous position to the last note in the sequence. + if (previous < 0) previous = sizeof(note_sequence) - 1; + + // Send Note On for current position at full velocity (127) on channel 1. + uint8_t note_on[3] = { 0x90 | channel, note_sequence[note_pos], 127 }; + tud_midi_stream_write(cable_num, note_on, 3); + + // Send Note Off for previous note. + uint8_t note_off[3] = { 0x80 | channel, note_sequence[previous], 0}; + tud_midi_stream_write(cable_num, note_off, 3); + + // Increment position + note_pos++; + + // If we are at the end of the sequence, start over. + if (note_pos >= sizeof(note_sequence)) note_pos = 0; +} + +//--------------------------------------------------------------------+ +// BLINKING TASK +//--------------------------------------------------------------------+ +void led_blinking_task(void) +{ + static uint32_t start_ms = 0; + static bool led_state = false; + + // Blink every interval ms + if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time + start_ms += blink_interval_ms; + + board_led_write(led_state); + led_state = 1 - led_state; // toggle +} |