forked from M-Labs/artiq
wrpll: fix Si549 initialization delays
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2b5213b013
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439576f59d
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@ -230,7 +230,7 @@ mod si549 {
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write(dcxo, 255, 0x00)?; // PAGE
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write_no_ack_value(dcxo, 7, 0x80)?; // RESET
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clock::spin_us(50_000); // required? not specified in datasheet.
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clock::spin_us(100_000); // required? not specified in datasheet.
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write(dcxo, 255, 0x00)?; // PAGE
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write(dcxo, 69, 0x00)?; // Disable FCAL override.
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@ -287,7 +287,9 @@ pub fn init() {
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si549::program(i2c::Dcxo::Helper, h_hsdiv, h_lsdiv, h_fbdiv)
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.expect("cannot initialize helper Si549");
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clock::spin_us(10_000); // Settling Time after FS Change
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// Si549 Settling Time for Large Frequency Change.
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// Datasheet said 10ms but it lied.
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clock::spin_us(50_000);
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unsafe { csr::wrpll::helper_reset_write(0); }
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clock::spin_us(1);
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