diff options
Diffstat (limited to 'nuttx/arch/arm/src/lpc17xx/lpc17_ethernet.c')
| -rw-r--r-- | nuttx/arch/arm/src/lpc17xx/lpc17_ethernet.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_ethernet.c b/nuttx/arch/arm/src/lpc17xx/lpc17_ethernet.c index 72fc5de38..21e60feb6 100644 --- a/nuttx/arch/arm/src/lpc17xx/lpc17_ethernet.c +++ b/nuttx/arch/arm/src/lpc17xx/lpc17_ethernet.c @@ -1462,7 +1462,13 @@ static int lpc17_ifup(struct uip_driver_s *dev) lpc17_putreg(ETH_RXINTS, LPC17_ETH_INTEN); #endif - /* Enable Rx */ + /* Enable Rx. "Enabling of the receive function is located in two places. + * The receive DMA manager needs to be enabled and the receive data path + * of the MAC needs to be enabled. To prevent overflow in the receive + * DMA engine the receive DMA engine should be enabled by setting the + * RxEnable bit in the Command register before enabling the receive data + * path in the MAC by setting the RECEIVE ENABLE bit in the MAC1 register." + */ regval = lpc17_getreg(LPC17_ETH_CMD); regval |= ETH_CMD_RXEN; |