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Diffstat (limited to 'tinyusb/examples/device/usbtmc/src/main.c')
-rwxr-xr-x | tinyusb/examples/device/usbtmc/src/main.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/tinyusb/examples/device/usbtmc/src/main.c b/tinyusb/examples/device/usbtmc/src/main.c new file mode 100755 index 00000000..1fce48f4 --- /dev/null +++ b/tinyusb/examples/device/usbtmc/src/main.c @@ -0,0 +1,143 @@ +/* + * 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" +#include "usbtmc_app.h" +//--------------------------------------------------------------------+ +// MACRO CONSTANT TYPEDEF PROTYPES +//--------------------------------------------------------------------+ + +/* Blink pattern + * - 250 ms : device not mounted + * - 0 ms : device mounted + * - 2500 ms : device is suspended + */ +enum { + BLINK_NOT_MOUNTED = 250, + BLINK_MOUNTED = 0, + BLINK_SUSPENDED = 2500, +}; + +static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED; + +void led_blinking_task(void); + +/*------------- MAIN -------------*/ +int main(void) +{ + board_init(); + + tusb_init(); + + while (1) + { + tud_task(); // tinyusb device task + led_blinking_task(); + usbtmc_app_task_iter(); + } + + 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; +} + +//--------------------------------------------------------------------+ +// BLINKING TASK + Indicator pulse +//--------------------------------------------------------------------+ + + +volatile uint8_t doPulse = false; +// called from USB context +void led_indicator_pulse(void) { + doPulse = true; +} + +void led_blinking_task(void) +{ + static uint32_t start_ms = 0; + static bool led_state = false; + if(blink_interval_ms == BLINK_MOUNTED) // Mounted + { + if(doPulse) + { + led_state = true; + board_led_write(true); + start_ms = board_millis(); + doPulse = false; + } + else if (led_state == true) + { + if ( board_millis() - start_ms < 750) //Spec says blink must be between 500 and 1000 ms. + { + return; // not enough time + } + led_state = false; + board_led_write(false); + } + } + else + { + // 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 + } +} |