Hello,
I created a simple project that prints something to a usb serial terminal using USBD_VCOM.
If I put WFI into my main loop, it doesn't work. In fact, the USB device won't even enum.
#include //Declarations from DAVE3 Code Generation (includes SFR declaration)
int period = 100;
handle_t main_tmr;
//Write to Terminal
void write() {
char buffer[32];
sprintf(buffer, "Blah %d\r\n", period);
USBD_VCOM_SendString(buffer);
}
//Check for receive to make sure connection is established, then start write timer
void tick() {
if (USBD_VCOM_BytesReceived())
{
SYSTM001_StopTimer(main_tmr);
handle_t tmr = SYSTM001_CreateTimer(period, SYSTM001_PERIODIC, write, NULL);
SYSTM001_StartTimer(tmr);
}
}
int main(void)
{
DAVE_Init(); // Initialization of DAVE Apps
USBD_VCOM_Init();
//Start check timer
main_tmr = SYSTM001_CreateTimer(1000, SYSTM001_PERIODIC, tick, NULL);
SYSTM001_StartTimer(main_tmr);
while(1)
{
//Comment in to break USB
//asm("WFI");
}
return 0;
}
I've attached a simple demonstration app.
Can anyone reproduce this behaviour or suggest a solution?
Best,
Luke
