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SS5's avatar
SS5
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

FIFO:How to slow down the clock Frequency from 50 Mhz

once I enable your counter, it is writing at full clock speed to the fifo once the fifo is full, the counter just continues counting by the time it start reading and printing the first value to the...
GuaBin_N_Intel's avatar
GuaBin_N_Intel
Icon for Contributor rankContributor
7 years ago

printf("STATUS = %u\n", altera_avalon_fifo_read_status(FIFO_0_IN_CSR_BASE,altera_avalon_fifo_read_status));

T​he fifo status isn't right. You have put the same function into the function argument. Refer to table 206, to read back all of bits, use the following command:

printf("STATUS = %u\n", altera_avalon_fifo_read_status(FIFO_0_IN_CSR_BASE,altera_avalon_fifo_status_all));

To debug, please put this status command before starting the transfer and after enabling the transfer.