espressif/esp-idf
1
0
Fork 1
mirror of https://github.com/espressif/esp-idf.git synced 2025-08-01 19:54:32 +02:00
Code Issues Packages Projects Releases Wiki Activity

fix(driver_spi): fixed esp32c5 spi slave dma potential rx error

Browse Source
This commit is contained in:
wanckl
2025-07-08 16:31:18 +08:00
committed by Wan Lei
parent 2e619615de
commit 0992a1db62
1 changed files with 14 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
components/esp_driver_spi/src/gpspi/spi_slave.c
View File

@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -640,13 +640,21 @@ static void SPI_SLAVE_ISR_ATTR s_spi_slave_dma_prepare_data(spi_dma_ctx_t *dma_c
spi_dma_reset(dma_ctx->rx_dma_chan);
spi_slave_hal_hw_prepare_rx(hal->hw);
spi_dma_start(dma_ctx->rx_dma_chan, dma_ctx->dmadesc_rx);
}
if (hal->tx_buffer) {
spicommon_dma_desc_setup_link(dma_ctx->dmadesc_tx, hal->tx_buffer, (hal->bitlen + 7) / 8, false);
spi_dma_reset(dma_ctx->tx_dma_chan);
spi_slave_hal_hw_prepare_tx(hal->hw);
}
}
static void SPI_SLAVE_ISR_ATTR s_spi_slave_start_dma(spi_dma_ctx_t *dma_ctx, spi_slave_hal_context_t *hal)
{
if (hal->rx_buffer) {
spi_dma_start(dma_ctx->rx_dma_chan, dma_ctx->dmadesc_rx);
}
if (hal->tx_buffer) {
spi_dma_start(dma_ctx->tx_dma_chan, dma_ctx->dmadesc_tx);
}
}
@@ -774,9 +782,12 @@ static void SPI_SLAVE_ISR_ATTR spi_intr(void *arg)
spi_slave_hal_hw_reset(hal);
s_spi_slave_prepare_data(host);
//The slave rx dma get disturbed by unexpected transaction. Only connect the CS when slave is ready.
//The slave rx dma get disturbed by unexpected transaction. Only connect the CS and start DMA when slave is ready.
if (use_dma) {
// Note: order of restore_cs and s_spi_slave_start_dma is important
// restore_cs also bring potential glitch, should happen before start DMA
restore_cs(host);
s_spi_slave_start_dma(host->dma_ctx, hal);
}
//Kick off transfer