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enc28j60: Use hardware padding for transmissions 

There is no reason to use software when a feature is available in
hardware.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
ico
Benoît Thébaudeau 2015-07-14 22:19:41 +02:00
parent 2cd3eaf310
commit 15d1b177d6
1 changed files with 2 additions and 21 deletions
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23
dev/enc28j60/enc28j60.c
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@ -498,8 +498,6 @@ enc28j60_init(uint8_t *mac_addr)
int
enc28j60_send(uint8_t *data, uint16_t datalen)
{
int padding = 0;
if(!initialized) {
return -1;
}
@ -535,30 +533,13 @@ enc28j60_send(uint8_t *data, uint16_t datalen)
/* Write the transmission control register as the first byte of the
output packet. We write 0x00 to indicate that the default
configuration (the values in MACON3) will be used. */
#define WITH_MANUAL_PADDING 1
#if WITH_MANUAL_PADDING
#define PADDING_MIN_SIZE 60
writedatabyte(0x0B); /* POVERRIDE, PCRCEN, PHUGEEN. Not PPADEN */
if(datalen < PADDING_MIN_SIZE) {
padding = PADDING_MIN_SIZE - datalen;
} else {
padding = 0;
}
#else /* WITH_MANUAL_PADDING */
writedatabyte(0x00); /* MACON3 */
padding = 0;
#endif /* WITH_MANUAL_PADDING */
/* Write a pointer to the last data byte. */
writereg(ETXNDL, (TX_BUF_START + datalen + 0 + padding) & 0xff);
writereg(ETXNDH, (TX_BUF_START + datalen + 0 + padding) >> 8);
writereg(ETXNDL, (TX_BUF_START + datalen + 0) & 0xff);
writereg(ETXNDH, (TX_BUF_START + datalen + 0) >> 8);
writedata(data, datalen);
if(padding > 0) {
uint8_t padding_buf[60];
memset(padding_buf, 0, padding);
writedata(padding_buf, padding);
}
/* Clear EIR.TXIF */
clearregbitfield(EIR, EIR_TXIF);