Friday, 2019-03-22

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emeb_mactnt: have you tried to use SB_SPI in up5k before? when I try I get the following error in nextpnr: ERROR: cell type 'SB_SPI' is unsupported (instantiated as 'uut.usysbus.spiInst0')01:51
emeb_macthis despite the fact that nextpnr reports SB_SPI as one of the available cells in the utilization report.01:52
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emeb_macdaveshah: is the SB_SPI cell supported in up5k? I'm getting an error that it's not when I try to use it.05:24
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tntemeb_mac: mmm, indeed looks like nextpnr is lacking support for it :/05:54
emeb_mactnt: weird05:57
emeb_macesp. since it's listed in the utilization report05:57
tntThe usage report is based on the chipdb, but you still need some code to support placing it. I'll see if I can add support for it.05:58
emeb_mac:)05:58
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Forty-Botis there a way to only preprocess?20:03
Forty-Bot...and I have discovered -ppdump20:04
cr1901_modernTIL20:05
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davoshey, I am using an ice40 ultra plus, trying to get the SPI IP block to work. I read through notes about ultra plus on the icestorm and it says there are 4 SPI_ENABLE_* signals. Wondering how to enable the SPI IP block in verilog? Is there an example anywhere for setting that type of signal?23:18
tntdavos: https://github.com/smunaut/nextpnr/commit/716b371ab92688993d0606e69b93030e0a3864fe23:19
tpbTitle: ice40: Add support for SB_I2C and SB_SPI · smunaut/[email protected] · GitHub (at github.com)23:19
tnt(not hw proven yet ... I wrote that like 1h ago)23:19
emebdavos: I'm trying tnt's patch for nextpnr right now - it seems to build OK but I need to test it further.23:38
emebhere's how I instantiated it -> https://pastebin.com/HWPTaQ7b23:39
tpbTitle: // system_bus.v - wrapper for wishbone master and system bus IP cores // 03-21- - Pastebin.com (at pastebin.com)23:39
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