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hmc830_7043: support 125MHz RTIO

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This commit is contained in:
Sebastien Bourdeauducq 2019-01-28 13:44:08 +08:00
parent bdd4e52a53
commit 2b0d63db23
1 changed files with 18 additions and 9 deletions
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27
artiq/firmware/libboard_artiq/hmc830_7043.rs
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@ -163,10 +163,10 @@ pub mod hmc7043 {
// Warning: dividers are not synchronized with HMC830 clock input!
// Set DAC_CLK_DIV to 1 or 0 for deterministic phase.
// (0 bypasses the divider and reduces noise)
pub const DAC_CLK_DIV: u16 = 0; // 2400MHz
pub const FPGA_CLK_DIV: u16 = 16; // 150MHz
pub const SYSREF_DIV: u16 = 256; // 9.375MHz
const HMC_SYSREF_DIV: u16 = SYSREF_DIV*8; // 1.171875MHz (must be <= 4MHz)
pub const DAC_CLK_DIV: u16 = 0;
pub const FPGA_CLK_DIV: u16 = 16;
pub const SYSREF_DIV: u16 = 256;
const HMC_SYSREF_DIV: u16 = SYSREF_DIV*8; // must be <= 4MHz
// enabled, divider, output config
const OUTPUT_CONFIG: [(bool, u16, u8); 14] = [
@ -413,17 +413,26 @@ pub mod hmc7043 {
}
pub fn init() -> Result<(), &'static str> {
// used by MasterDAC - HMC830 is clocked from 100MHz reference
#[cfg(all(hmc830_ref = "100", rtio_frequency = "125.0"))]
const DIV: (u32, u32, u32, u32) = (1, 20, 0, 1); // 100MHz -> 2.0GHz
#[cfg(all(hmc830_ref = "100", rtio_frequency = "150.0"))]
const DIV: (u32, u32, u32, u32) = (1, 24, 0, 1); // 100MHz -> 2.4GHz
// used by Satellite - HMC830 is clocked by recovered clock
// (or a clock of the same frequency derived from the same oscillator)
#[cfg(all(hmc830_ref = "125", rtio_frequency = "125.0"))]
const DIV: (u32, u32, u32, u32) = (2, 32, 0, 1); // 125MHz -> 2.0GHz
#[cfg(all(hmc830_ref = "150", rtio_frequency = "150.0"))]
const DIV: (u32, u32, u32, u32) = (2, 32, 0, 1); // 150MHz -> 2.4GHz
clock_mux::init();
/* do not use other SPI devices before HMC830 SPI mode selection */
hmc830::select_spi_mode();
hmc830::detect()?;
hmc830::init();
// 2.4GHz out
#[cfg(hmc830_ref = "100")]
hmc830::set_dividers(1, 24, 0, 1);
#[cfg(hmc830_ref = "150")]
hmc830::set_dividers(2, 32, 0, 1);
hmc830::set_dividers(DIV.0, DIV.1, DIV.2, DIV.3);
hmc830::check_locked()?;