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add raspberry 4 support #58

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add raspberry 4 support #58

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4 changes: 4 additions & 0 deletions cnc/hal_raspberry/rpgpio_private.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,12 +11,14 @@
# https://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf
RPI1_PERI_BASE = 0x20000000
RPI2_3_PERI_BASE = 0x3F000000
RPI4_PERI_BASE = 0xFE000000
# detect board version
try:
with open("/proc/cpuinfo", "r") as f:
d = f.read()
r = re.search("^Revision\s+:\s+(.+)$", d, flags=re.MULTILINE)
h = re.search("^Hardware\s+:\s+(.+)$", d, flags=re.MULTILINE)
m = re.search("^Model\s+:\s+(.+)$", d, flags=re.MULTILINE)
RPI_1_REVISIONS = ['0002', '0003', '0004', '0005', '0006', '0007',
'0008', '0009', '000d', '000e', '000f', '0010',
'0011', '0012', '0013', '0014', '0015', '900021',
Expand All @@ -25,6 +27,8 @@
raise ImportError("This is not raspberry pi board.")
elif r.group(1) in RPI_1_REVISIONS:
PERI_BASE = RPI1_PERI_BASE
elif "Pi 4" in m.group(1):
PERI_BASE = RPI4_PERI_BASE
elif "BCM2" in h.group(1):
PERI_BASE = RPI2_3_PERI_BASE
else:
Expand Down