Hi Kevin,
On Mon, Jul 16, 2018 at 10:57:32PM +0200, Kevin Townsend wrote:
> I'm trying to add I2C support to the existing (SPI only) BME280 driver,
> but I'm not sure how to enforce the following conditional restrictions
> in the syscfg.yml file(s):
>
> * If BME280_SHELL_ITF_TYPE == 1, I2C_0 must be set
> * If BME280_SHELL_ITF_TYPE == 0, SPI_0_MASTER must be set
It's a bit ugly, but this should do the trick:
BME280_SHELL_ITF_TYPE:
description: 'Shell interface type for the BME280'
value: 0
restrictions:
- '(BME280_SHELL_ITF_TYPE && I2C_0) ||
(!BME280_SHELL_ITF_TYPE && SPI_0_MASTER)'
(I think we should add support for an `I2C_0 if 0` notation here).
> How would you check the contents of a field, rather than simply testing
> 'on' or 'off', and verify the appropriate transport is enabled?
You can use the <, <=, >=, >, and == operators to check contents. The
first four operators coerce the setting value to an integer. The `==`
operator converts a setting value to the same type as the other operand.
Examples:
- BME280_LOG_MODULE # True if not "", 0, or false.
- BME280_LOG_MODULE < 100
- CONSOLE_UART_BAUD == "UART_FLOW_CTL_NONE"
Chris
