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hmc830_7043: enable_fpga_ibuf -> unmute

This commit is contained in:
Sebastien Bourdeauducq 2019-10-06 18:13:59 +08:00
parent 5ad65b9d30
commit ad63908aff
1 changed files with 5 additions and 6 deletions
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11
artiq/firmware/libboard_artiq/hmc830_7043.rs
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@ -361,15 +361,14 @@ pub mod hmc7043 {
Ok(()) Ok(())
} }
pub fn enable_fpga_ibuf() { pub fn unmute() {
/* /*
* Never missing an opportunity to be awful, the HMC7043 produces broadband noise * Never missing an opportunity to be awful, the HMC7043 produces broadband noise
* prior to intialization, which can upset the FPGA. * prior to intialization, which can upset the AMC FPGA.
* One mitigation technique is to disable the input buffer until the HMC7043 is * External circuitry mutes it.
* slightly better behaved.
*/ */
unsafe { unsafe {
csr::ad9154_crg::ibuf_disable_write(0); csr::hmc7043_out_en::out_write(1);
} }
} }
@ -416,7 +415,7 @@ pub fn init() -> Result<(), &'static str> {
hmc7043::init(); hmc7043::init();
hmc7043::test_gpo()?; hmc7043::test_gpo()?;
hmc7043::check_phased()?; hmc7043::check_phased()?;
hmc7043::enable_fpga_ibuf(); hmc7043::unmute();
Ok(()) Ok(())
} }