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From: Sylvia Else <sylvia@email.invalid>
Newsgroups: sci.electronics.design
Subject: Re: Raspberry Pi pico2 launches with an ARM and a Risc V processor
 core
Date: Wed, 14 Aug 2024 18:56:49 +0800
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On 12-Aug-24 8:03 am, Jan Panteltje wrote:
> On a sunny day (Sun, 11 Aug 2024 12:02:20 -0700) it happened John Larkin
> <jjlarkin@highlandtechnology.com> wrote in
> <8c2ibjh8e5ob06n15fu8hf1oh1hec9505d@4ax.com>:
> 
>> On Sun, 11 Aug 2024 05:53:49 GMT, Jan Panteltje <alien@comet.invalid>
>> wrote:
>>
>>> On a sunny day (Sat, 10 Aug 2024 09:45:36 -0700) it happened John Larkin
>>> <jjlarkin@highlandtechnology.com> wrote in
>>> <5q5fbjpr8210i0man2rqe2349g24uaohct@4ax.com>:
>>>
>>>> On Sat, 10 Aug 2024 09:09:22 GMT, Jan Panteltje <alien@comet.invalid>
>>>> wrote:
>>>>
>>>>> Raspberry Pi Pico 2 Launches with Arm + Risc V Cores: hands-on with the new, $5 microcontroller
>>>>>
>>>>>
>>>>> https://www.tomshardware.com/raspberry-pi/raspberry-pi-pico/raspberry-pi-pico-2-launches-with-arm-risc-v-cores-hands-on-with-the-new-dollar5-microcontroller#main
>>>>>
>>>>> So 2 processors for 5 $
>>>>>
>>>>> Comparing some features
>>>>>
>>>>>   Raspberry Pi Pico
>>>>> SoC:  RP2040, Dual Core Arm Cortex M0+ running at up to 133 MH
>>>>> SRAM: 264 K
>>>>> Flash Storage: 2MB QSPI
>>>>> 3 x 12 bit ADC
>>>>> sleep mode < 100 uA
>>>>>
>>>>>   Raspberry Pi Pico 2
>>>>> SoC:        RP2350, Dual Core Arm Cortex M33 or Dual Core RISC-V Hazard3 running at up to 150 MHz
>>>>> SRAM: 520 KB
>>>>> Flash Storage: 4MB QSPI
>>>>> Security: Arm TrustZone, 8KB OTP, Secure Boot
>>>>> 4 x 12 bit ADC
>>>>> sleep mode < 10 uA
>>>>>
>>>>> More in the above link.
>>>>
>>>> That's amazing. The Pi stuff is incredible.
>>>>
>>>> We're designing around the RP2040 chip now. Dual-core ARM for 70
>>>> cents. It's rated at 133 MHz max, but overclocks to about 400. Some
>>>> lunatic froze one and ran the core voltage up and got it to work at 1
>>>> GHz.
>>>>
>>>> We're now designing an interposer board, to connect to a Pi 400 on one
>>>> end and to a 20-pin ribbon cable, to our DUTs, on the other, for
>>>> development and for production test both. I can post the schematic if
>>>> anyone is interested.
>>>
>>>
>>> I am curious to the performance of that RISC-V processor core.
>>> I may order a Pico 2 if I see it in the webshops here (not yet it seems, just checked).
>>>
>>
>> It is strange to get a choice of CPU!
>>
>> I'd expect that at the bit-bang level, performance will be about the
>> same. On a 2040 ARM chip, we can bit-bang a gpio port and make a train
>> of 7 ns pulses, which is single cycles with a 133 Mhz clock. RiscV
>> can't do better than that.
>>
>> It would be cool if the floating point ops were faster, in either
>> mode. On a 2040, the usual single-precision things take ballpark 600
>> ns.
>>
> 
> C compiler may make a difference, need GCC with output for that processor.
> I have no idea, likely will get some development package with the right gcc.
> 

https://wiki.riscv.org/display/HOME/Toolchain+Projects