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| author | Gregory Nutt <gnutt@nuttx.org> | 2015-01-08 06:30:37 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2015-01-08 06:30:37 -0600 |
| commit | 33ef2079d63853ca3d4fba682e2be6e3d980a2ba (patch) | |
| tree | f5d12fa387cb6d083f8d3835e59d782452ed44c9 | |
| parent | 3cfb3001c68d449f0b59586bca112bf5a2e226fa (diff) | |
| download | nuttx-33ef2079d63853ca3d4fba682e2be6e3d980a2ba.tar.gz nuttx-33ef2079d63853ca3d4fba682e2be6e3d980a2ba.tar.bz2 nuttx-33ef2079d63853ca3d4fba682e2be6e3d980a2ba.zip | |
Update ChangeLog
| -rwxr-xr-x | nuttx/ChangeLog | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog index 8307647a1..b8f8d8bb3 100755 --- a/nuttx/ChangeLog +++ b/nuttx/ChangeLog @@ -9372,3 +9372,15 @@ * arch/arm/src/tiva/tiva_irq.c: Fix Tiva IRQ control logic; was limited to only 64 IRQs. That is a problem for higher numbered IRQs on many platforms (2015-01-06). + * arch/arm/src/stm32/stm32_sdio.c, drivers/mmcsd/mmcsd_sdio.c and Kconfig, + and include/nuttx/sdio.h: MMCSD SDIO: Add support for a new + SDWAIT_WRCOMPLETE condition. The previous logic used a busy-wait loop + to pool the car d R1 start to determine when the card was ready for + the next transfer. That busy-wait can be quite long -- up to hundreds + of milliseconds. And alternative is to look the the SD D0 pin which + will change state when the card is no longer busy. This change avoids + the busy-wait poll by reconfiguring the SD D0 pin as a GPIO interrupt, + then waiting for the card to become ready without taking up CPU + cycles. This change is conditioned on CONFIG_MMCSD_SDIOWATI_WRCOMPLETE + and is currently only implemented for the STM32 SDIO driver. From + David Sidrane (2015-01-08). |