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Issue for GMAC internal loopback example on S32K344
Hello
I have a question while porting GMAC Loopback mode code.
The structure of my project is as follows:
- PIT increments the counter variable every 1 ms.
- When the counter variable reaches 10, the GMAC_Test function is called.
When the GMAC_Test function is called, the output information is as follows:
Tx buffer: 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66) 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66)
Rx buffer: 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00)
Tx buffer: 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66) 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66)
Rx buffer: 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66) 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66)
Tx buffer: 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66) 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66)
Rx buffer: 99 (0x63) 191 (0xbf) 193 (0xc1) 247 (0xf7) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00)
Tx buffer: 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66) 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66)
Rx buffer: 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66) 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66)
Tx buffer: 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66) 17 (0x11) 34 (0x22) 51 (0x33) 68 (0x44) 85 (0x55) 102 (0x66)
Rx buffer: 99 (0x63) 191 (0xbf) 193 (0xc1) 247 (0xf7) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00) 0 (0x00)
After this, the GMAC status variable remains stuck in the GMAC_STATUS_RX_QUEUE_EMPTY state.
In other words, the message sent from TX does not appear to be properly reflected in the RX buffer, and after sending and receiving the message 5 times, the GMAC_STATUS_RX_QUEUE_EMPTY state cannot be exited.
How can I resolve this issue?
Apologies, I have resolved the issue.
I had not added DstAddr, SrcAddr, EtherType/Length, and FCS to the data, and I had not called the Gmac_Ip_ProvideRxBuff(INST_GMAC_0, 0U, &rx_buffer) function.
After adding this code, the issue was resolved.
