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hmc7043: do not configure phases during initial init 

They are determined later on.
This commit is contained in:
Sebastien Bourdeauducq 2018-06-21 10:11:52 +08:00
parent 7cc3da4faf
commit 45e8263208
2 changed files with 19 additions and 20 deletions
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36
artiq/firmware/libboard_artiq/hmc830_7043.rs
View File

@ -163,22 +163,22 @@ pub mod hmc7043 {
const SYSREF_DIV: u32 = 128; // 9.375MHz
const HMC_SYSREF_DIV: u32 = SYSREF_DIV*8; // 1.171875MHz (must be <= 4MHz)
// enabled, divider, analog phase shift, digital phase shift, output config
const OUTPUT_CONFIG: [(bool, u32, u8, u8, u8); 14] = [
(true, DAC_CLK_DIV, 0x0, 0x0, 0x08), // 0: DAC2_CLK
(true, SYSREF_DIV, 0x0, 0x0, 0x08), // 1: DAC2_SYSREF
(true, DAC_CLK_DIV, 0x0, 0x0, 0x08), // 2: DAC1_CLK
(true, SYSREF_DIV, 0x0, 0x0, 0x08), // 3: DAC1_SYSREF
(false, 0, 0x0, 0x0, 0x08), // 4: ADC2_CLK
(false, 0, 0x0, 0x0, 0x08), // 5: ADC2_SYSREF
(false, 0, 0x0, 0x0, 0x08), // 6: GTP_CLK2
(true, SYSREF_DIV, 0x0, 0x2, 0x10), // 7: FPGA_DAC_SYSREF, LVDS
(true, FPGA_CLK_DIV, 0x0, 0x0, 0x08), // 8: GTP_CLK1
(false, 0, 0x0, 0x0, 0x10), // 9: AMC_MASTER_AUX_CLK
(false, 0, 0x0, 0x0, 0x10), // 10: RTM_MASTER_AUX_CLK
(false, 0, 0x0, 0x0, 0x10), // 11: FPGA_ADC_SYSREF, LVDS
(false, 0, 0x0, 0x0, 0x08), // 12: ADC1_CLK
(false, 0, 0x0, 0x0, 0x08), // 13: ADC1_SYSREF
// enabled, divider, output config
const OUTPUT_CONFIG: [(bool, u32, u8); 14] = [
(true, DAC_CLK_DIV, 0x08), // 0: DAC2_CLK
(true, SYSREF_DIV, 0x08), // 1: DAC2_SYSREF
(true, DAC_CLK_DIV, 0x08), // 2: DAC1_CLK
(true, SYSREF_DIV, 0x08), // 3: DAC1_SYSREF
(false, 0, 0x08), // 4: ADC2_CLK
(false, 0, 0x08), // 5: ADC2_SYSREF
(false, 0, 0x08), // 6: GTP_CLK2
(true, SYSREF_DIV, 0x10), // 7: FPGA_DAC_SYSREF, LVDS
(true, FPGA_CLK_DIV, 0x08), // 8: GTP_CLK1
(false, 0, 0x10), // 9: AMC_MASTER_AUX_CLK
(false, 0, 0x10), // 10: RTM_MASTER_AUX_CLK
(false, 0, 0x10), // 11: FPGA_ADC_SYSREF, LVDS
(false, 0, 0x08), // 12: ADC1_CLK
(false, 0, 0x08), // 13: ADC1_SYSREF
];
@ -281,7 +281,7 @@ pub mod hmc7043 {
for channel in 0..14 {
let channel_base = 0xc8 + 0x0a*(channel as u16);
let (enabled, divider, aphase, dphase, outcfg) = OUTPUT_CONFIG[channel];
let (enabled, divider, outcfg) = OUTPUT_CONFIG[channel];
if enabled {
// Only clock channels need to be high-performance
@ -291,8 +291,6 @@ pub mod hmc7043 {
else { write(channel_base, 0x10); }
write(channel_base + 0x1, (divider & 0xff) as u8);
write(channel_base + 0x2, ((divider & 0x0f) >> 8) as u8);
write(channel_base + 0x3, aphase & 0x1f);
write(channel_base + 0x4, dphase & 0x1f);
// bypass analog phase shift on clock channels to reduce noise
if (channel % 2) == 0 {

3
artiq/gateware/jesd204_tools.py
View File

@ -49,7 +49,8 @@ class UltrascaleCRG(Module, AutoCSR):
i_I=jref.p, i_IB=jref.n,
o_O=jref_se),
# SYSREF normally meets s/h at the FPGA, except during margin
# scan. Be paranoid and use a double-register anyway.
# scan and before full initialization.
# Be paranoid and use a double-register anyway.
MultiReg(jref_se, self.jref, "jesd")
]