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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-10-10 16:45:17 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-10-10 16:45:17 +0000 |
| commit | 2e3c93708f069c2a6ef0511e12ba12282ae7ed6b (patch) | |
| tree | a4a7451ac91aca496e7d4ceeaa8b16df08ab44cc /nuttx/arch | |
| parent | 18289d868d53c24e10197fd2d5f4c250dd4bceb6 (diff) | |
| download | px4-nuttx-2e3c93708f069c2a6ef0511e12ba12282ae7ed6b.tar.gz px4-nuttx-2e3c93708f069c2a6ef0511e12ba12282ae7ed6b.tar.bz2 px4-nuttx-2e3c93708f069c2a6ef0511e12ba12282ae7ed6b.zip | |
updated comments
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1024 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch')
| -rw-r--r-- | nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.c | 8 | ||||
| -rw-r--r-- | nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.h | 6 |
2 files changed, 9 insertions, 5 deletions
diff --git a/nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.c b/nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.c index 31098a6e7..9ab55b79e 100644 --- a/nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.c +++ b/nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.c @@ -787,7 +787,9 @@ static void lpc214x_epwrite(ubyte epphy, const ubyte *data, uint32 nbytes) uint32 value; boolean aligned = (((uint32)data & 3) == 0); - /* Set the write enable bit for this physical EP address */ + /* Set the write enable bit for this physical EP address. Bits 2-5 are + * the logical endpoint number (0-15) + */ lpc214x_putreg(((epphy << 1) & LPC214X_USBCTRL_EPMASK) | LPC214X_USBCTRL_WREN, LPC214X_USBDEV_CTRL); @@ -865,7 +867,9 @@ static int lpc214x_epread(ubyte epphy, ubyte *data, uint32 nbytes) } } - /* Set the read enable bit for this physical EP address */ + /* Set the read enable bit for this physical EP address. Bits 2-5 are + * the logical endpoint number (0-15). + */ lpc214x_putreg(((epphy << 1) & LPC214X_USBCTRL_EPMASK) | LPC214X_USBCTRL_RDEN, LPC214X_USBDEV_CTRL); diff --git a/nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.h b/nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.h index 55438799e..9ed2550a8 100644 --- a/nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.h +++ b/nuttx/arch/arm/src/lpc214x/lpc214x_usbdev.h @@ -185,9 +185,9 @@ /* USB Control register bit definitions */ -#define LPC214X_USBCTRL_RDEN (0x00000001) -#define LPC214X_USBCTRL_WREN (0x00000002) -#define LPC214X_USBCTRL_EPMASK (0x0000003c) +#define LPC214X_USBCTRL_RDEN (0x00000001) /* Bit 0=1: Read is enabled */ +#define LPC214X_USBCTRL_WREN (0x00000002) /* Bit 0=1: Write is enabled */ +#define LPC214X_USBCTRL_EPMASK (0x0000003c) /* Bits 2:5: Logical endpoint 0-15 */ /* Endpoints *******************************************************************/ |