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Fix BDMA

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This commit is contained in:
chemicstry 2022-03-16 19:41:34 +02:00
parent bf4a38ac06
commit 48fc48ea7d
2 changed files with 23 additions and 4 deletions
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25
embassy-stm32/src/dma/bdma.rs
View file

@ -11,7 +11,7 @@ use crate::dma::Request;
use crate::pac;
use crate::pac::bdma::vals;
use super::{Word, WordSize};
use super::{TransferOptions, Word, WordSize};
impl From<WordSize> for vals::Size {
fn from(raw: WordSize) -> Self {
@ -55,7 +55,7 @@ foreach_dma_channel! {
($channel_peri:ident, $dma_peri:ident, bdma, $channel_num:expr, $index:expr, $dmamux:tt) => {
impl crate::dma::sealed::Channel for crate::peripherals::$channel_peri {
unsafe fn start_write<W: Word>(&mut self, _request: Request, buf: *const[W], reg_addr: *mut W) {
unsafe fn start_write<W: Word>(&mut self, _request: Request, buf: *const[W], reg_addr: *mut W, options: TransferOptions) {
let (ptr, len) = super::slice_ptr_parts(buf);
low_level_api::start_transfer(
pac::$dma_peri,
@ -68,6 +68,7 @@ foreach_dma_channel! {
len,
true,
vals::Size::from(W::bits()),
options,
#[cfg(dmamux)]
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_REGS,
#[cfg(dmamux)]
@ -76,7 +77,7 @@ foreach_dma_channel! {
}
unsafe fn start_write_repeated<W: Word>(&mut self, _request: Request, repeated: W, count: usize, reg_addr: *mut W) {
unsafe fn start_write_repeated<W: Word>(&mut self, _request: Request, repeated: W, count: usize, reg_addr: *mut W, options: TransferOptions) {
let buf = [repeated];
low_level_api::start_transfer(
pac::$dma_peri,
@ -89,6 +90,7 @@ foreach_dma_channel! {
count,
false,
vals::Size::from(W::bits()),
options,
#[cfg(dmamux)]
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_REGS,
#[cfg(dmamux)]
@ -96,7 +98,7 @@ foreach_dma_channel! {
)
}
unsafe fn start_read<W: Word>(&mut self, _request: Request, reg_addr: *const W, buf: *mut [W]) {
unsafe fn start_read<W: Word>(&mut self, _request: Request, reg_addr: *const W, buf: *mut [W], options: TransferOptions) {
let (ptr, len) = super::slice_ptr_parts_mut(buf);
low_level_api::start_transfer(
pac::$dma_peri,
@ -109,6 +111,7 @@ foreach_dma_channel! {
len,
true,
vals::Size::from(W::bits()),
options,
#[cfg(dmamux)]
<Self as super::dmamux::sealed::MuxChannel>::DMAMUX_REGS,
#[cfg(dmamux)]
@ -155,9 +158,23 @@ mod low_level_api {
mem_len: usize,
incr_mem: bool,
data_size: vals::Size,
options: TransferOptions,
#[cfg(dmamux)] dmamux_regs: pac::dmamux::Dmamux,
#[cfg(dmamux)] dmamux_ch_num: u8,
) {
assert!(
options.mburst == crate::dma::Burst::Single,
"Burst mode not supported"
);
assert!(
options.pburst == crate::dma::Burst::Single,
"Burst mode not supported"
);
assert!(
options.flow_ctrl == crate::dma::FlowControl::Dma,
"Peripheral flow control not supported"
);
let ch = dma.ch(channel_number as _);
reset_status(dma, channel_number);

2
embassy-stm32/src/dma/mod.rs
View file

@ -129,6 +129,7 @@ impl Word for u32 {
}
}
#[derive(Debug, PartialEq)]
pub enum Burst {
/// Single transfer
Single,
@ -140,6 +141,7 @@ pub enum Burst {
Incr16,
}
#[derive(Debug, PartialEq)]
pub enum FlowControl {
/// Flow control by DMA
Dma,