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| author | Gregory Nutt <gnutt@nuttx.org> | 2014-07-12 11:24:14 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-07-12 11:24:14 -0600 |
| commit | 1a455c873948d9611be2da6eb1c93ae06e31d7b8 (patch) | |
| tree | 1cf0ed058a1c4eace0fedf84ccc42107bdf106a6 /nuttx/configs | |
| parent | 3ed275bd9a40a427cf7de0802522129e859d0a74 (diff) | |
| download | px4-nuttx-1a455c873948d9611be2da6eb1c93ae06e31d7b8.tar.gz px4-nuttx-1a455c873948d9611be2da6eb1c93ae06e31d7b8.tar.bz2 px4-nuttx-1a455c873948d9611be2da6eb1c93ae06e31d7b8.zip | |
SAMA5 LCDC: Back out the delay kludge. Increase the LCDC input clock from MCK to 2*MCK was sufficient for all timing instbility problems
Diffstat (limited to 'nuttx/configs')
| -rw-r--r-- | nuttx/configs/sama5d4-ek/include/board.h | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/nuttx/configs/sama5d4-ek/include/board.h b/nuttx/configs/sama5d4-ek/include/board.h index 2afad607e..ad8a33f93 100644 --- a/nuttx/configs/sama5d4-ek/include/board.h +++ b/nuttx/configs/sama5d4-ek/include/board.h @@ -203,19 +203,6 @@ #define BOARD_LCDC_PIXELCLOCK \ (BOARD_LCDC_HSPERIOD * BOARD_LCDC_VSPERIOD * BOARD_LCDC_FRAMERATE) -/* This specifies a delay after enabling the LCDC. This was found - * experimentally and is very much a kludge. I presume that a delay of a - * couple of frame times allows some unstable clocking to synchronize before - * we start thrashing the framebuffer? But I am not sure why this is - * necessary and, in fact, is certainly not necessary in other LCDC - * configurations. Perhaps the delay would not be necessary if timings were - * more precise? - * - * Delays are in units of microseconds. - */ - -#define BOARD_LCDC_ENABLE_DELAY (50*1000) - /* Backlight prescaler value and PWM output polarity */ #define BOARD_LCDC_PWMPS LCDC_LCDCFG6_PWMPS_DIV1 |