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3 Commits

Author SHA1 Message Date
Andrew Tridgell 26d1371d25 HAL_ChibiOS: separate out DMA allocation for sdcard IO 
this fixes an issue with DMA to SPI6 on STM32H7. On the H7 SRAM4 can
be used for DMA and BDMA to all devices except for SDMMC which uses
IDMA.

by separating out DMA of sdcard data from other data we can arrange
for DMA to all devices to work
 2019-03-09 07:33:47 +11:00
Andrew Tridgell f083b80700 HAL_ChibiOS: added preallocation of DMA bouncebuffers 
we need 512 bytes for microSD
 2018-07-12 14:34:04 +10:00
Andrew Tridgell 0b1e26a470 HAL_ChibiOS: added bouncebuffer system 
this makes our bouncebuffers available for ChibiOS system
drivers. This is needed for SDMMCv1 on STM32F7
 2018-06-06 07:15:41 +10:00