djsundog/circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Disallow ctrl-C interrupts of RP2040 SPI and PIO

Browse Source
This commit is contained in:
Dan Halbert 2021-07-08 13:42:24 -04:00
parent a843b8a0d4
commit ab52a92704
2 changed files with 3 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
ports/raspberrypi/common-hal/busio/SPI.c
View File

@ -212,15 +212,6 @@ static bool _transfer(busio_spi_obj_t *self,
while (dma_channel_is_busy(chan_rx) || dma_channel_is_busy(chan_tx)) {
// TODO: We should idle here until we get a DMA interrupt or something else.
RUN_BACKGROUND_TASKS;
if (mp_hal_is_interrupted()) {
if (dma_channel_is_busy(chan_rx)) {
dma_channel_abort(chan_rx);
}
if (dma_channel_is_busy(chan_tx)) {
dma_channel_abort(chan_tx);
}
break;
}
}
}
@ -233,7 +224,7 @@ static bool _transfer(busio_spi_obj_t *self,
dma_channel_unclaim(chan_tx);
}
if (!use_dma && !mp_hal_is_interrupted()) {
if (!use_dma) {
// Use software for small transfers, or if couldn't claim two DMA channels
// Never have more transfers in flight than will fit into the RX FIFO,
// else FIFO will overflow if this code is heavily interrupted.
@ -241,7 +232,7 @@ static bool _transfer(busio_spi_obj_t *self,
size_t rx_remaining = len;
size_t tx_remaining = len;
while (!mp_hal_is_interrupted() && (rx_remaining || tx_remaining)) {
while (rx_remaining || tx_remaining) {
if (tx_remaining && spi_is_writable(self->peripheral) && rx_remaining - tx_remaining < fifo_depth) {
spi_get_hw(self->peripheral)->dr = (uint32_t)*data_out;
// Increment only if the buffer is the transfer length. It's 1 otherwise.

17
ports/raspberrypi/common-hal/rp2pio/StateMachine.c
View File

@ -654,15 +654,6 @@ static bool _transfer(rp2pio_statemachine_obj_t *self,
(tx && dma_channel_is_busy(chan_tx))) {
// TODO: We should idle here until we get a DMA interrupt or something else.
RUN_BACKGROUND_TASKS;
if (mp_hal_is_interrupted()) {
if (rx && dma_channel_is_busy(chan_rx)) {
dma_channel_abort(chan_rx);
}
if (tx && dma_channel_is_busy(chan_tx)) {
dma_channel_abort(chan_tx);
}
break;
}
}
// Clear the stall bit so we can detect when the state machine is done transmitting.
self->pio->fdebug = stall_mask;
@ -677,7 +668,7 @@ static bool _transfer(rp2pio_statemachine_obj_t *self,
dma_channel_unclaim(chan_tx);
}
if (!use_dma && !mp_hal_is_interrupted()) {
if (!use_dma) {
// Use software for small transfers, or if couldn't claim two DMA channels
size_t rx_remaining = in_len / in_stride_in_bytes;
size_t tx_remaining = out_len / out_stride_in_bytes;
@ -706,9 +697,6 @@ static bool _transfer(rp2pio_statemachine_obj_t *self,
--rx_remaining;
}
RUN_BACKGROUND_TASKS;
if (mp_hal_is_interrupted()) {
break;
}
}
// Clear the stall bit so we can detect when the state machine is done transmitting.
self->pio->fdebug = stall_mask;
@ -719,9 +707,6 @@ static bool _transfer(rp2pio_statemachine_obj_t *self,
while (!pio_sm_is_tx_fifo_empty(self->pio, self->state_machine) ||
(self->wait_for_txstall && (self->pio->fdebug & stall_mask) == 0)) {
RUN_BACKGROUND_TASKS;
if (mp_hal_is_interrupted()) {
break;
}
}
}
return true;