AM3358 can only print eight letters C when power on, but not always print continuously letter c

gongchengshi

My hardware is now set BOOT 0100 0000 0101 0110 SPI0 MMC0 UART0, EMAC1. I insert the SD card, after power board can normally start from SD card,After power on, the board also can start from SPI. Board power on can only print eight C,When I remove the SD card Erase SPI,What is the reason? The new production of the same number of cards, no operation, power is the only print eight C.

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

How long do you wait after the eight C characters? Next after UART0 is EMAC1, which has a 3 minute timeout.

0 gongchengshi over 9 years ago in reply to Biser Gatchev-XID

Intellectual 390 points

Thank you very much, indeed, after three minutes and print the letter c. Can you tell me which article which describes this issue.Can you give me a link to it

0 Biser Gatchev-XID over 9 years ago in reply to gongchengshi

TI__Guru**** 393215 points

This is stated at the end of section 26.1.8.4.2 in the AM335X TRM Rev. L:

"Timeouts and retries:
• Exponentially increasing timeouts starting from 4s, doubling for each retry.
• 5 retries"

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AM3358 can only print eight letters C when power on, but not always print continuously letter c