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Adding support for DBM

This commit is contained in:
Ryan Summers 2020-12-07 18:44:45 +01:00
parent 6eaf2cc073
commit 551cc5d742
1 changed files with 10 additions and 8 deletions
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18
src/digital_input_stamper.rs
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@ -1,18 +1,16 @@
use super::{hal, timers, DmaConfig, PeripheralToMemory, Transfer}; use super::{SAMPLE_BUFFER_SIZE, hal, timers, DmaConfig, PeripheralToMemory, Transfer};
const INPUT_BUFFER_SIZE: usize = 1;
#[link_section = ".axisram.buffers"] #[link_section = ".axisram.buffers"]
static mut BUF: [[u16; INPUT_BUFFER_SIZE]; 2] = [[0; INPUT_BUFFER_SIZE]; 2]; static mut BUF: [[u16; SAMPLE_BUFFER_SIZE]; 3] = [[0; SAMPLE_BUFFER_SIZE]; 3];
pub struct InputStamper { pub struct InputStamper {
_di0_trigger: hal::gpio::gpioa::PA3<hal::gpio::Alternate<hal::gpio::AF2>>, _di0_trigger: hal::gpio::gpioa::PA3<hal::gpio::Alternate<hal::gpio::AF2>>,
next_buffer: Option<&'static mut [u16; INPUT_BUFFER_SIZE]>, next_buffer: Option<&'static mut [u16; SAMPLE_BUFFER_SIZE]>,
transfer: Transfer< transfer: Transfer<
hal::dma::dma::Stream6<hal::stm32::DMA1>, hal::dma::dma::Stream6<hal::stm32::DMA1>,
timers::tim5::Channel4InputCapture, timers::tim5::Channel4InputCapture,
PeripheralToMemory, PeripheralToMemory,
&'static mut [u16; INPUT_BUFFER_SIZE], &'static mut [u16; SAMPLE_BUFFER_SIZE],
>, >,
} }
@ -32,21 +30,25 @@ impl InputStamper {
let dma_config = DmaConfig::default() let dma_config = DmaConfig::default()
.transfer_complete_interrupt(true) .transfer_complete_interrupt(true)
.memory_increment(true) .memory_increment(true)
.circular_buffer(true)
.double_buffer(true)
.peripheral_increment(false); .peripheral_increment(false);
// This needs to operate in double-buffer+circular mode so that we don't potentially drop
// input timestamps.
let mut timestamp_transfer: Transfer<_, _, PeripheralToMemory, _> = let mut timestamp_transfer: Transfer<_, _, PeripheralToMemory, _> =
Transfer::init( Transfer::init(
stream, stream,
input_capture, input_capture,
unsafe { &mut BUF[0] }, unsafe { &mut BUF[0] },
None, unsafe { Some(&mut BUF[1]) },
dma_config, dma_config,
); );
timestamp_transfer.start(|_| {}); timestamp_transfer.start(|_| {});
Self { Self {
next_buffer: unsafe { Some(&mut BUF[1]) }, next_buffer: unsafe { Some(&mut BUF[2]) },
transfer: timestamp_transfer, transfer: timestamp_transfer,
_di0_trigger: trigger, _di0_trigger: trigger,
} }