From 9279b0cd52333a846b57af890f708ebb364b62b7 Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sat, 3 Sep 2016 01:21:34 -0500 Subject: [PATCH] altos/stm: Set SPI slave DMA priority to HIGH/VERY_HIGH Set spi slave DMA priority MOSI to HIGH and MISO to VERY_HIGH. Slave SPI doesn't have the luxury of slowing down when the system is busy, so provide it maximum memory bandwidth to try and keep up with the master. Signed-off-by: Keith Packard --- src/stm/ao_spi_stm_slave.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/src/stm/ao_spi_stm_slave.c b/src/stm/ao_spi_stm_slave.c index de07a7fc..5bb5105d 100644 --- a/src/stm/ao_spi_stm_slave.c +++ b/src/stm/ao_spi_stm_slave.c @@ -55,7 +55,7 @@ ao_spi_slave_send(void *block, uint16_t len) block, len, (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | + (STM_DMA_CCR_PL_HIGH << STM_DMA_CCR_PL) | (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | (1 << STM_DMA_CCR_MINC) | @@ -75,7 +75,7 @@ ao_spi_slave_send(void *block, uint16_t len) &spi_dev_null, len, (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | + (STM_DMA_CCR_PL_VERY_HIGH << STM_DMA_CCR_PL) | (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | (0 << STM_DMA_CCR_MINC) | @@ -111,7 +111,7 @@ ao_spi_slave_recv(void *block, uint16_t len) &spi_dev_null, len, (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | + (STM_DMA_CCR_PL_HIGH << STM_DMA_CCR_PL) | (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | (0 << STM_DMA_CCR_MINC) | @@ -128,7 +128,7 @@ ao_spi_slave_recv(void *block, uint16_t len) block, len, (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | + (STM_DMA_CCR_PL_VERY_HIGH << STM_DMA_CCR_PL) | (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | (1 << STM_DMA_CCR_MINC) | -- 2.30.2