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runtime: enable ad9914 matched latency

This commit is contained in:
Sebastien Bourdeauducq 2015-08-22 12:25:44 +08:00
parent 094fc1cfd1
commit fba05531f4
2 changed files with 8 additions and 14 deletions
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14
soc/runtime/dds.c
View File

@ -77,18 +77,12 @@ void dds_init(long long int timestamp, int channel)
#endif
#ifdef DDS_AD9914
/*
* Enable cosine output (to match AD9858 behavior)
* Enable DAC calibration
* Leave SYNCLK enabled and PLL/divider disabled
*/
DDS_WRITE(DDS_CFR1L, 0x0008);
DDS_WRITE(DDS_CFR1H, 0x0000);
DDS_WRITE(DDS_CFR4H, 0x0105);
DDS_WRITE(DDS_CFR1H, 0x0000); /* Enable cosine output */
DDS_WRITE(DDS_CFR2L, 0x8900); /* Enable matched latency */
DDS_WRITE(DDS_CFR4H, 0x0105); /* Enable DAC calibration */
DDS_WRITE(DDS_FUD, 0);
/* Disable DAC calibration */
now += DURATION_DAC_CAL;
DDS_WRITE(DDS_CFR4H, 0x0005);
DDS_WRITE(DDS_CFR4H, 0x0005); /* Disable DAC calibration */
DDS_WRITE(DDS_FUD, 0);
#endif
}

8
soc/runtime/test_mode.c
View File

@ -237,13 +237,13 @@ static void ddsinit(void)
long long int t;
brg_ddsreset();
brg_ddswrite(DDS_CFR1L, 0x0008);
brg_ddswrite(DDS_CFR1H, 0x0000);
brg_ddswrite(DDS_CFR4H, 0x0105);
brg_ddswrite(DDS_CFR1H, 0x0000); /* Enable cosine output */
brg_ddswrite(DDS_CFR2L, 0x8900); /* Enable matched latency */
brg_ddswrite(DDS_CFR4H, 0x0105); /* Enable DAC calibration */
brg_ddswrite(DDS_FUD, 0);
t = clock_get_ms();
while(clock_get_ms() < t + 2);
brg_ddswrite(DDS_CFR4H, 0x0005);
brg_ddswrite(DDS_CFR4H, 0x0005); /* Disable DAC calibration */
brg_ddsfud();
}
#endif