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Altera_Forum
Honored Contributor
Honored ContributorSDRAM Read and write address control
Dear Friends, i am trying to write and read data in SDRAM. but while writing and reading i don't have any control over address where i perform my read/write operation. i am using following ...
Altera_ForumHonored Contributor
Honored Contributor@daixiwen
i am writing to sdram. i dont use the PLL core. i only use the DE board external interface core to provide the clock needed. do i have to use the PLL? but i dont know how to configure it. here is a part of my code to write to sdram sdram_index=0; for(a=0;a<64;a++) { IOWR_ALTERA_AVALON_PIO_DATA(SDRAM_0_BASE+sdram_index,jpeg_data.mtrx_Y1[a]); jpeg_data.sdram_index+=2; } and then i read it with command IORD_ALTERA_AVALON_PIO_DATA(SDRAM_0_BASE+offset); the value of jpeg_data.mtrx_Y1[0] is -23 which is supposed to be written in offset 0, but when i read the offset 0, i dont get -23.
