Can't set pins > 31 as GPIO

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[ ] BUG REPORT

BUG REPORT

Expected behavior

We should be able to use all physical pins as GPIOHS pins

Actual behavior

As it stands, only pins 0-31 can be used as GPIOHS. This is because, for whatever reason, in the following code:

fpioa_set_function(3, FUNC_GPIOHS3);
gpiohs_set_drive_mode(3, GPIO_DM_OUTPUT);
gpiohs_set_pin(3, GPIO_PV_HIGH);

the physical pin is identified by the enum FUNC_GPIOHS3 instead of the first argument to fpioa_set_function. That enum is limited to FUNC_GPIOHS0 - FUNC_GPIOHS31, so pins 32-35 are unusable.

My expectation for how this would work is that the following would turn on pin 35:

fpioa_set_function(35, FUNC_GPIOHS1);
gpiohs_set_drive_mode(35, GPIO_DM_OUTPUT);
gpiohs_set_pin(35, GPIO_PV_HIGH);

This behavior would allow setting any 32 hardware pins to GPIOHS at a time. Is there a hardware limitation as to why physical pins > 31 can't be used?

Document version

Standalone SDK version 0.5.6

Hardware

Sipeed MAiX BiT

System

What system do you use? Arch Linux, running PlatformIO 4.3.4 with the standalone SDK version 0.5.6

kendryte / kendryte-standalone-sdk