From 1a9034ff7c3aa2b17822a61e35ea277ec401d2ac Mon Sep 17 00:00:00 2001 From: Jeff Epler Date: Fri, 6 May 2022 14:21:09 -0500 Subject: [PATCH] rp2pio: Allow background_write(None) to terminate after complete loop --- ports/raspberrypi/common-hal/rp2pio/StateMachine.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ports/raspberrypi/common-hal/rp2pio/StateMachine.c b/ports/raspberrypi/common-hal/rp2pio/StateMachine.c index c38e1ec010..b830a82be8 100644 --- a/ports/raspberrypi/common-hal/rp2pio/StateMachine.c +++ b/ports/raspberrypi/common-hal/rp2pio/StateMachine.c @@ -917,7 +917,7 @@ bool common_hal_rp2pio_statemachine_background_write(rp2pio_statemachine_obj_t * self->loop = *loop; self->pending_buffers = pending_buffers; - if (self->dma_completed) { + if (self->dma_completed && self->once.info.len) { rp2pio_statemachine_dma_complete(self, SM_DMA_GET_CHANNEL(pio_index, sm)); self->dma_completed = false; }