From: Keith Packard Date: Sat, 3 Sep 2016 05:55:19 +0000 (-0500) Subject: altos/stm: Set MISO DMA priority to HIGH to avoid OVR X-Git-Tag: 1.6.8~1^2~6 X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=af2eefbed43e56885a7321319d69b7be17354cdd altos/stm: Set MISO DMA priority to HIGH to avoid OVR When the MISO DMA priority is too low, and the processor gets busy, it's possible for SPI input to overrun the processor, which causes the MISO DMA to get out of sync and never finish. Set the MISO DMA priority to HIGH to avoid this. Signed-off-by: Keith Packard --- diff --git a/src/stm/ao_spi_stm.c b/src/stm/ao_spi_stm.c index 5a3790c5..05078f3b 100644 --- a/src/stm/ao_spi_stm.c +++ b/src/stm/ao_spi_stm.c @@ -116,7 +116,7 @@ ao_spi_set_dma_miso(uint8_t id, void *data, uint16_t len, uint32_t minc) data, 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) | (minc << STM_DMA_CCR_MINC) |