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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_atsamd21e18.go
+5
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@@ -17,6 +17,11 @@ var (
sercomUSART1 = UART{Buffer: NewRingBuffer(), Bus: sam.SERCOM1_USART, SERCOM: 1}
sercomUSART2 = UART{Buffer: NewRingBuffer(), Bus: sam.SERCOM2_USART, SERCOM: 2}
sercomUSART3 = UART{Buffer: NewRingBuffer(), Bus: sam.SERCOM3_USART, SERCOM: 3}
sercomI2CM0 = &I2C{Bus: sam.SERCOM0_I2CM, SERCOM: 0}
sercomI2CM1 = &I2C{Bus: sam.SERCOM1_I2CM, SERCOM: 1}
sercomI2CM2 = &I2C{Bus: sam.SERCOM2_I2CM, SERCOM: 2}
sercomI2CM3 = &I2C{Bus: sam.SERCOM3_I2CM, SERCOM: 3}
)
func init() {