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samd_sercom: Specify the sercom explicitly in a config option

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Do not infer the sercom from the config section name, as that
prevents one from using SPI buses on multiple samd mcus.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2021-07-03 22:52:42 -04:00
parent df43c9e9bf
commit d1bdde56cc
3 changed files with 18 additions and 11 deletions
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14
docs/Config_Reference.md
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@ -3793,13 +3793,17 @@ i2c_address:
## [samd_sercom]
SAMD SERCOM configuration to specify which pins to use on a given
SERCOM. One may define one section with the "samd_sercom" prefix per
SERCOM available. Each SERCOM must be configured prior to using it as
SPI or I2C peripheral. Place this config section above any other
section that makes use of SPI or I2C buses.
SERCOM. One may define any number of sections with a "samd_sercom"
prefix. Each SERCOM must be configured prior to using it as SPI or I2C
peripheral. Place this config section above any other section that
makes use of SPI or I2C buses.
```
[samd_sercom sercom0]
[samd_sercom my_sercom]
sercom:
# The name of the sercom bus to configure in the micro-controller.
# Available names are "sercom0", "sercom1", etc.. This parameter
# must be provided.
tx_pin:
# MOSI pin for SPI communication, or SDA (data) pin for I2C
# communication. The pin must have a valid pinmux configuration