From: Michael (XIAO Xufeng) <xiaoxufeng@espressif.com>
Date: Fri, 20 Jul 2018 03:42:50 +0000 (+0800)
Subject: spi_master: change to DMA burst mode when access descriptors
X-Git-Tag: v3.2-beta1~296^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=203ceed1e797b160a193c7e613daa6c4144eb9f9;p=esp-idf

spi_master: change to DMA burst mode when access descriptors
---

diff --git a/components/driver/spi_master.c b/components/driver/spi_master.c
index 5728bd45e9..cafe64253f 100644
--- a/components/driver/spi_master.c
+++ b/components/driver/spi_master.c
@@ -607,6 +607,8 @@ static void SPI_MASTER_ISR_ATTR spi_intr(void *arg)
         host->hw->dma_in_link.start=0;
         host->hw->dma_conf.val &= ~(SPI_OUT_RST|SPI_IN_RST|SPI_AHBM_RST|SPI_AHBM_FIFO_RST);
         host->hw->dma_conf.out_data_burst_en=1;
+        host->hw->dma_conf.indscr_burst_en=1;
+        host->hw->dma_conf.outdscr_burst_en=1;
         //Set up QIO/DIO if needed
         host->hw->ctrl.val &= ~(SPI_FREAD_DUAL|SPI_FREAD_QUAD|SPI_FREAD_DIO|SPI_FREAD_QIO);
         host->hw->user.val &= ~(SPI_FWRITE_DUAL|SPI_FWRITE_QUAD|SPI_FWRITE_DIO|SPI_FWRITE_QIO);