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sam: simplify I2C peripheral declarations

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This commit changes the I2C declarations so that the objects are
instantiated in each chip file (e.g. machine_atsamd21e18.go) and used to
define I2C0 (and similar) in the board file (e.g. board_qtpy.go). This
should make it easier to define new board files, and reduces the need
for separate *_baremetal.go files.

I have tested this the following way:

  - With the LIS3DH driver example on the Circuit Playground Express and
    the PyBadge.
  - With the LSM6DS3 driver example on the Arduino Nano 33 IoT.

They both still work fine.
This commit is contained in:
Ayke van Laethem
2021-10-15 22:52:34 +02:00
committed by Ron Evans
parent e50885a6f2
commit ae864bdf0c
42 changed files with 169 additions and 153 deletions
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src/machine/machine_generic_peripherals.go
+11
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// +build !baremetal,!arduino_mkr1000,!arduino_mkrwifi1010,!arduino_nano33,!arduino_zero,!circuitplay_express,!feather_m0,!feather_m4,!grandcentral_m4,!itsybitsy_m0,!itsybitsy_m4,!matrixportal_m4,!metro_m4_airlift,!p1am_100,!pybadge,!pygamer,!pyportal,!qtpy,!trinket_m0,!wioterminal,!xiao
package machine
// These peripherals are defined separately so that they can be excluded on
// boards that define their peripherals in the board file (e.g. board_qtpy.go).
var (
SPI0 = SPI{0}
I2C0 = &I2C{0}
)