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stm32/f1/can: Add function to detect if can system has an available mailbox

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This commit is contained in:
Jeff Ciesielski 2012-10-22 13:26:58 -07:00
parent ffe392c11b
commit dd5e797d61
1 changed files with 13 additions and 0 deletions
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13
lib/stm32/f1/can.c
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@ -313,3 +313,16 @@ void can_receive(u32 canport, u8 fifo, bool release, u32 *id, bool *ext,
if (release)
can_fifo_release(CAN1, 0);
}
bool can_available_mailbox(u32 canport)
{
if ((CAN_TSR(canport) & CAN_TSR_TME0) == CAN_TSR_TME0) {
return true;
} else if ((CAN_TSR(canport) & CAN_TSR_TME1) == CAN_TSR_TME1) {
return true;
} else if ((CAN_TSR(canport) & CAN_TSR_TME2) == CAN_TSR_TME2) {
return true;
} else {
return false;
}
}