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Update PDMA descriptor docs

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Dániel Buga 2023-06-26 18:55:53 +02:00 committed by Scott Mabin
parent 14823d669f
commit 559d00703d
1 changed files with 4 additions and 2 deletions
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6
esp-hal-common/src/dma/pdma.rs
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@ -224,7 +224,8 @@ macro_rules! ImplSpiChannel {
impl [<Spi $num DmaChannelCreator>] { impl [<Spi $num DmaChannelCreator>] {
/// Configure the channel for use /// Configure the channel for use
/// ///
/// Descriptors should be sized as (BUFFERSIZE / 4092) * 3 /// Descriptors should be sized as `((BUFFERSIZE + 4091) / 4092) * 3`. I.e., to
/// transfer buffers of size `1..=4092`, you need 3 descriptors.
pub fn configure<'a>( pub fn configure<'a>(
self, self,
burst_mode: bool, burst_mode: bool,
@ -462,7 +463,8 @@ macro_rules! ImplI2sChannel {
impl [<I2s $num DmaChannelCreator>] { impl [<I2s $num DmaChannelCreator>] {
/// Configure the channel for use /// Configure the channel for use
/// ///
/// Descriptors should be sized as (BUFFERSIZE / 4092) * 3 /// Descriptors should be sized as `((BUFFERSIZE + 4091) / 4092) * 3`. I.e., to
/// transfer buffers of size `1..=4092`, you need 3 descriptors.
pub fn configure<'a>( pub fn configure<'a>(
self, self,
burst_mode: bool, burst_mode: bool,