diff options
| -rw-r--r-- | ports/mimxrt/machine_spi.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/ports/mimxrt/machine_spi.c b/ports/mimxrt/machine_spi.c index c7ee226bf..db2fab4ee 100644 --- a/ports/mimxrt/machine_spi.c +++ b/ports/mimxrt/machine_spi.c @@ -230,7 +230,7 @@ void LPSPI_EDMAMasterCallback(LPSPI_Type *base, lpspi_master_edma_handle_t *hand STATIC void machine_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) { machine_spi_obj_t *self = (machine_spi_obj_t *)self_in; // Use DMA for large transfers if channels are available - const size_t dma_min_size_threshold = 16; // That's the FIFO size + const size_t dma_min_size_threshold = FSL_FEATURE_LPSPI_FIFO_SIZEn(0); // The Macro argument is ignored int chan_tx = -1; int chan_rx = -1; @@ -302,6 +302,10 @@ STATIC void machine_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8 } if (!use_dma) { + // Wait until a previous Transfer is finished + while (LPSPI_GetTxFifoCount(self->spi_inst) > 0) { + MICROPY_EVENT_POLL_HOOK + } // Reconfigure the TCR, required after switch between DMA vs. non-DMA LPSPI_Enable(self->spi_inst, false); // Disable first before new settings are applied self->spi_inst->TCR = LPSPI_TCR_CPOL(self->master_config->cpol) | LPSPI_TCR_CPHA(self->master_config->cpha) | |