GMAC transmit problem

Discussion around product based on ARM Cortex M4 core.

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Mejla mejla
Posts: 1
Joined: Sat Aug 02, 2014 6:36 pm

GMAC transmit problem

Mon Aug 04, 2014 5:04 pm

Hi everybody. I would like to ask you for advice of checking conditions for next transmition start ability. I tried to catch the GMAC_ISR_TCOMP in IRQ handler or check GMAC_TSR_TXGO, tried to wait for USED bit transition to log.1 in Tx descriptors, but nothing seems to be sufficient and I must insert some delay before next transmision.
Strange thinks occures to when I worked only with one Tx buffer. Every transmision was done twice and ended with GMAC_ISR_TXUBR set.

Can anybody help me please?
 
I'm using  SAM4E16C with LAN8710a

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