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Simplify start of CRC computation. #57

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Simplify start of CRC computation. #57

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8 changes: 3 additions & 5 deletions module_ethernet/src/full/mii_master.xc
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Original file line number Diff line number Diff line change
Expand Up @@ -232,8 +232,6 @@ void mii_rx_pins(
continue;
}

crc = 0x9226F562;

#if ETHERNET_RX_HP_QUEUE
if (!buf_hp) {
dptr_hp = dptr_lp;
Expand All @@ -242,7 +240,7 @@ void mii_rx_pins(

#pragma xta endpoint "mii_rx_first_word"
p_mii_rxd :> word;
crc32(crc, word, poly);
crc = ~word;
mii_packet_set_data_word_imm(dptr_lp, 0, word);
#if ETHERNET_RX_HP_QUEUE
mii_packet_set_data_word_imm(dptr_hp, 0, word);
Expand Down Expand Up @@ -408,7 +406,7 @@ int g_mii_idle_slope[NUM_ETHERNET_PORTS];
unsigned mii_transmit_packet(unsigned buf, out buffered port:32 p_mii_txd, timer tmr, unsigned ifg_time)
{
register const unsigned poly = 0xEDB88320;
unsigned int crc = 0;
unsigned int crc;

unsigned int word;
unsigned int dptr;
Expand Down Expand Up @@ -439,7 +437,7 @@ unsigned mii_transmit_packet(unsigned buf, out buffered port:32 p_mii_txd, timer
p_mii_txd <: word;
dptr+=4;
i++;
crc32(crc, ~word, poly);
crc = ~word;

do {
#pragma xta label "mii_tx_loop"
Expand Down