diff options
Diffstat (limited to 'nuttx')
-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 *******************************************************************/ |