summaryrefslogtreecommitdiff
path: root/examples/device/cdc_msc/src/main.c
diff options
context:
space:
mode:
authorhathach <[email protected]>2019-09-11 13:09:14 +0700
committerhathach <[email protected]>2019-09-11 13:09:14 +0700
commit7599541c1a33cc55b2a33fc160252e93811abe81 (patch)
tree2e0f643692a163444909a1ba62c5c35b20e3a0b3 /examples/device/cdc_msc/src/main.c
parente9bf62bc131629fb63efcd73a4103a5063b584ab (diff)
rename cdc_msc_hid to cdc_msc, hid has its own example hid_composite now
Diffstat (limited to 'examples/device/cdc_msc/src/main.c')
-rw-r--r--examples/device/cdc_msc/src/main.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/examples/device/cdc_msc/src/main.c b/examples/device/cdc_msc/src/main.c
new file mode 100644
index 000000000..c6ed4a922
--- /dev/null
+++ b/examples/device/cdc_msc/src/main.c
@@ -0,0 +1,164 @@
+/*
+ * 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);
+
+/*------------- MAIN -------------*/
+int main(void)
+{
+ board_init();
+
+ tusb_init();
+
+ while (1)
+ {
+ tud_task(); // tinyusb device task
+ led_blinking_task();
+
+ cdc_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 HID device example\r\n");
+ }
+}
+
+// Invoked when CDC interface received data from host
+void tud_cdc_rx_cb(uint8_t itf)
+{
+ (void) itf;
+}
+
+//--------------------------------------------------------------------+
+// 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
+}