1 files changed, 2 insertions, 0 deletions
diff --git a/lib/can2040/can2040.c b/lib/can2040/can2040.c
index f39636ae..fb9e3fb6 100644
--- a/lib/can2040/can2040.c
+++ b/lib/can2040/can2040.c
@@ -347,6 +347,8 @@ pio_sm_setup(struct can2040 *cd)
     pio_hw_t *pio_hw = cd->pio_hw;
     pio_hw->ctrl = PIO_CTRL_SM_RESTART_BITS | PIO_CTRL_CLKDIV_RESTART_BITS;
     pio_hw->fdebug = 0xffffffff;
+    pio_hw->irq = 0xff;
+    pio_signal_set_txpending(cd);
 
     // Load pio program
     int i;