sched: Introduce sched_wake_tasks() function to wake up tasks

Add function to indicate when tasks need to be run.  This will allow
the scheduler code to know if there are any tasks that need to be
processed.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 10 insertions, 2 deletions

diff --git a/lib/pjrc_usb_serial/usb_serial.c b/lib/pjrc_usb_serial/usb_serial.c
index ac5bc8a2..0c2488d5 100644
--- a/lib/pjrc_usb_serial/usb_serial.c
+++ b/lib/pjrc_usb_serial/usb_serial.c
@@ -325,7 +325,7 @@ void usb_init(void)
         UDCON = 0;				// enable attach resistor
 	usb_configuration = 0;
 	cdc_line_rtsdtr = 0;
-        UDIEN = (1<<EORSTE)|(1<<SOFE);
+        UDIEN = (1<<EORSTE);
 	sei();
 }
 
@@ -359,6 +359,7 @@ int16_t usb_serial_getchar(void)
 			UEINTX = 0x6B;
 			goto retry;
 		}	
+		UEIENX = (1<<RXOUTE);
 		SREG = intr_state;
 		return -1;
 	}
@@ -775,7 +776,14 @@ static inline void usb_ack_out(void)
 //
 ISR(USB_COM_vect)
 {
-        uint8_t intbits;
+        uint8_t intbits = UEINT;
+        if (intbits & (1<<CDC_RX_ENDPOINT)) {
+                UENUM = CDC_RX_ENDPOINT;
+                UEIENX = 0;
+                extern void sched_wake_tasks(void);
+                sched_wake_tasks();
+                return;
+        }
 	const uint8_t *list;
         const uint8_t *cfg;
 	uint8_t i, n, len, en;