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correct led dfu_rt example

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also add example usage note
This commit is contained in:
hathach 2020-06-30 23:26:51 +07:00
parent 2b9466dbc0
commit 400c2d2e50
1 changed files with 21 additions and 37 deletions
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58
examples/device/dfu_rt/src/main.c
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@ -23,6 +23,19 @@
* *
*/ */
/* After device is enumerated, run following command
*
* $ dfu-util -l
*
* It should be able to list our device as in Runtime mode. Then run
*
* $ dfu-util -e
*
* This will send DETTACH command to put device into bootloader. Since this example
* is minimal, it doesn't actually go into DFU mode but rather change the LED blinking
* pattern to fast rate as indicator.
*/
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
@ -41,9 +54,9 @@
* - 2500 ms : device is suspended * - 2500 ms : device is suspended
*/ */
enum { enum {
BLINK_DFU_MODE = 1000, BLINK_DFU_MODE = 100,
BLINK_NOT_MOUNTED = 250, BLINK_NOT_MOUNTED = 250,
BLINK_MOUNTED = 0, BLINK_MOUNTED = 1000,
BLINK_SUSPENDED = 2500, BLINK_SUSPENDED = 2500,
}; };
@ -104,48 +117,19 @@ void tud_dfu_rt_reboot_to_dfu(void)
blink_interval_ms = BLINK_DFU_MODE; blink_interval_ms = BLINK_DFU_MODE;
} }
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
// BLINKING TASK + Indicator pulse // 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) void led_blinking_task(void)
{ {
static uint32_t start_ms = 0; static uint32_t start_ms = 0;
static bool led_state = false; 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); // Blink every interval ms
led_state = 1 - led_state; // toggle 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
} }