pico-micropython-examples/interp/interp.py

# demonstrate driving low level rp2040 functions from Python by
# direct register access - see datasheet at 
# https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf
# for details

from machine import mem32

# base address of SIO
SIO_BASE = 0xD0000000

# INTERP0 registers
INTERP0_ACCUM0 = SIO_BASE + 0x80
INTERP0_BASE0 = SIO_BASE + 0x88
INTERP0_POP_LANE0 = SIO_BASE + 0x94
INTERP0_CTRL_LANE0 = SIO_BASE + 0xAC

# initialise lane 0 on interp: set that we are using all 32 bits
mem32[INTERP0_CTRL_LANE0] = 0x1F << 10

# set up 9 x table example - write to accum[0] and base[0] registers
mem32[INTERP0_ACCUM0] = 0
mem32[INTERP0_BASE0] = 9

# read pop register 10 times
for j in range(10):
    print(mem32[INTERP0_POP_LANE0])
Alias registers with sensible names 2023-01-06 17:55:02 +00:00			`# demonstrate driving low level rp2040 functions from Python by`
			`# direct register access - see datasheet at`
			`# https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf`
			`# for details`

Convert hello_interp.c:times_table to µPython Not useful for efficient calculation of times-tables (it is not) but a nice way to show accessing hardware registers in the rp2040 from µPython 2023-01-06 14:01:06 +00:00			`from machine import mem32`

Alias registers with sensible names 2023-01-06 17:55:02 +00:00			`# base address of SIO`
			`SIO_BASE = 0xD0000000`

			`# INTERP0 registers`
Typo 2023-01-06 18:31:42 +00:00			`INTERP0_ACCUM0 = SIO_BASE + 0x80`
			`INTERP0_BASE0 = SIO_BASE + 0x88`
			`INTERP0_POP_LANE0 = SIO_BASE + 0x94`
			`INTERP0_CTRL_LANE0 = SIO_BASE + 0xAC`
Alias registers with sensible names 2023-01-06 17:55:02 +00:00
Convert hello_interp.c:times_table to µPython Not useful for efficient calculation of times-tables (it is not) but a nice way to show accessing hardware registers in the rp2040 from µPython 2023-01-06 14:01:06 +00:00			`# initialise lane 0 on interp: set that we are using all 32 bits`
Alias registers with sensible names 2023-01-06 17:55:02 +00:00			`mem32[INTERP0_CTRL_LANE0] = 0x1F << 10`
Convert hello_interp.c:times_table to µPython Not useful for efficient calculation of times-tables (it is not) but a nice way to show accessing hardware registers in the rp2040 from µPython 2023-01-06 14:01:06 +00:00
			`# set up 9 x table example - write to accum[0] and base[0] registers`
Alias registers with sensible names 2023-01-06 17:55:02 +00:00			`mem32[INTERP0_ACCUM0] = 0`
			`mem32[INTERP0_BASE0] = 9`
Convert hello_interp.c:times_table to µPython Not useful for efficient calculation of times-tables (it is not) but a nice way to show accessing hardware registers in the rp2040 from µPython 2023-01-06 14:01:06 +00:00
			`# read pop register 10 times`
			`for j in range(10):`
Alias registers with sensible names 2023-01-06 17:55:02 +00:00			`print(mem32[INTERP0_POP_LANE0])`