Mirror/ardupilot
5
0
Fork 0
mirror of https://github.com/ArduPilot/ardupilot synced 2025-01-24 09:38:29 -04:00
Code Issues Packages Projects Releases Wiki Activity

HAL_ChibiOS: raise DMA contention threshold for H7

Browse Source
This commit is contained in:
Andrew Tridgell 2021-07-08 09:00:43 +10:00 committed by Randy Mackay
parent aab77f7046
commit 4218452475
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
libraries/AP_HAL_ChibiOS/UARTDriver.cpp
View File

@ -909,7 +909,13 @@ void UARTDriver::write_pending_bytes_DMA(uint32_t n)
chEvtGetAndClearEvents(EVT_TRANSMIT_DMA_COMPLETE); chEvtGetAndClearEvents(EVT_TRANSMIT_DMA_COMPLETE);
if (dma_handle->has_contention()) { if (dma_handle->has_contention()) {
if (_baudrate <= 115200) { // on boards with a hw fifo we can use a higher threshold for disabling DMA
#if defined(USART_CR1_FIFOEN)
const uint32_t baud_threshold = 460800;
#else
const uint32_t baud_threshold = 115200;
#endif
if (_baudrate <= baud_threshold) {
contention_counter += 3; contention_counter += 3;
if (contention_counter > 1000) { if (contention_counter > 1000) {
// more than 25% of attempts to use this DMA // more than 25% of attempts to use this DMA