Good day, I have Sipeed Tang Nano 1K (which is replacement for Tang Nano already s

From GW1NZ series of FPGA Products (look at LV - C6/I5) ( <a href="https://dl.sipeed.c

Sipeed Tang Nano 1k support about litex-boards HOT 2 OPEN

Podolyakofs commented on August 18, 2024

Sipeed Tang Nano 1k support

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Comments (2)

trabucayre commented on August 18, 2024

My first idea was to introduce a variant arg to select between original and new. But both seems really different for pinout/LCD/etc.
It make more sense to introduce a new platform/target called sipeed_tang_nano_1k.py.
Could you explain a bit more changes required to GW1NPLL ?

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Podolyakofs commented on August 18, 2024

From GW1NZ series of FPGA Products (look at LV - C6/I5) ( https://dl.sipeed.com/shareURL/TANG/Nano%201K/6_Chip_Manual/EN)

@staticmethod
    def get_vco_freq_range(device):
           vco_freq_range = None
           if device.startswith('GW1NZ'):  #Add this FPGA and its VCO (or change to startwith"GW1NZ-1")
                   if 'C6/I5' in device:
                          vco_freq_range = (400e6, 800e6)  # datasheet says (400, 800)

@staticmethod
    def get_pfd_freq_range(device):
        pfd_freq_range = None
        if device.startswith('GW1NZ'):            #Add this FPGA and its PFD (or change to startwith"GW1NZ-1")
            if 'C6/I5' in device:
                pfd_freq_range = (3e6, 400e6)  # datasheet says (3, 400)

But I'm not sure that this is enough
Device and part number is from https://github.com/sipeed/TangNano-1K-examples/blob/main/example_led/led_prj/src/led_prj.cst

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