diff options
Diffstat (limited to 'nuttx/arch/arm/src/lpc17xx/lpc17_emacram.h')
| -rw-r--r-- | nuttx/arch/arm/src/lpc17xx/lpc17_emacram.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_emacram.h b/nuttx/arch/arm/src/lpc17xx/lpc17_emacram.h index 84a7ebb15..16a3b00c1 100644 --- a/nuttx/arch/arm/src/lpc17xx/lpc17_emacram.h +++ b/nuttx/arch/arm/src/lpc17xx/lpc17_emacram.h @@ -123,7 +123,7 @@ /* Descriptor Memory Layout *********************************************************/ /* EMAC DMA RAM and descriptor definitions. The configured number of descriptors * will determine the organization and the size of the descriptor and status tables. - * There is a complex interaction between the maximum packet size (CONFIG_NET_BUFSIZE) + * There is a complex interaction between the maximum packet size (CONFIG_NET_ETH_MTU) * and the number of Rx and Tx descriptors that can be suppored (CONFIG_NET_NRXDESC * and CONFIG_NET_NTXDESC): Small buffers -> more packets. This is something that * needs to be tuned for you system. @@ -137,7 +137,7 @@ * * An example with all of the details: * - * NTXDESC=18 NRXDESC=18 CONFIG_NET_EMACRAM_SIZE=16Kb CONFIG_NET_BUFSIZE=420: + * NTXDESC=18 NRXDESC=18 CONFIG_NET_EMACRAM_SIZE=16Kb CONFIG_NET_ETH_MTU=420: * LPC17_TXDESCTAB_SIZE = 18*8 = 144 * LPC17_TXSTATTAB_SIZE = 18*4 = 72 * LPC17_TXTAB_SIZE = 216 @@ -209,7 +209,7 @@ #define LPC17_PKTMEM_SIZE (LPC17_EMACRAM_SIZE-LPC17_DESCTAB_SIZE) #define LPC17_PKTMEM_END (LPC17_EMACRAM_BASE+LPC17_PKTMEM_SIZE) -#define LPC17_MAXPACKET_SIZE ((CONFIG_NET_BUFSIZE + CONFIG_NET_GUARDSIZE + 3) & ~3) +#define LPC17_MAXPACKET_SIZE ((CONFIG_NET_ETH_MTU + CONFIG_NET_GUARDSIZE + 3) & ~3) #define LPC17_NTXPKTS CONFIG_NET_NTXDESC #define LPC17_NRXPKTS CONFIG_NET_NRXDESC |