Hardware
/
litex
mirror of https://github.com/enjoy-digital/litex.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

software/liblitedram: use single iteration of dq-dqs training

This commit is contained in:
Jędrzej Boczar 2021-04-27 10:54:32 +02:00
parent 4c26dbe98f
commit ad23130a9a
1 changed files with 7 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
litex/soc/software/liblitedram/sdram.c
View File

@ -1075,22 +1075,16 @@ static void sdram_read_leveling_best_bitslip(int module)
static void sdram_write_dq_dqs_training(void) static void sdram_write_dq_dqs_training(void)
{ {
/* In the first iteration read leveling and DQ-DQS training may not be done optimally */
const int n_iter = 2;
int i; int i;
int show;
int module; int module;
for (i = 0; i < n_iter; ++i) { for(module=0; module<SDRAM_PHY_MODULES; module++) {
show = i == n_iter - 1; /* Find best bitslip */
for(module=0; module<SDRAM_PHY_MODULES; module++) { sdram_read_leveling_best_bitslip(module);
/* Find best bitslip */ /* Center DQ-DQS window */
sdram_read_leveling_best_bitslip(module); sdram_leveling_center_module(module, 1, 1,
/* Center DQ-DQS window */ sdram_write_dq_dqs_training_rst_delay, sdram_write_dq_dqs_training_inc_delay);
sdram_leveling_center_module(module, show, show, }
sdram_write_dq_dqs_training_rst_delay, sdram_write_dq_dqs_training_inc_delay);
}
}
} }
#endif /* SDRAM_PHY_WRITE_DQ_DQS_TRAINING_CAPABLE */ #endif /* SDRAM_PHY_WRITE_DQ_DQS_TRAINING_CAPABLE */