Configures the I²C clock speed and enables the port
Device
| Name | Type | Description |
|---|---|---|
| clockSpeed | Constant |
The preferred I²C clock speed
|
Nothing
This method enables the specified I²C port and sets its clock speed. Only certain clock speeds are available; select the one you require by consulting the datasheet of the peripheral you are connecting to the imp and passing one of the following constants into i2c.configure()’s only parameter:
| Clock Speed Constant | Value | Description |
|---|---|---|
| CLOCK_SPEED_10_KHZ | 10000 | Clock speed of 10kHz |
| CLOCK_SPEED_50_KHZ | 50000 | Clock speed of 50kHz |
| CLOCK_SPEED_100_KHZ | 100000 | Clock speed of 100kHz |
| CLOCK_SPEED_400_KHZ | 400000 | Clock speed of 400kHz |
The values assigned to the constants may change in a future impOS™ release.
The code below provides an example of using an I²C device. It configures an SA56004X temperature sensor — as found on the Hannah R2 reference design, for example — by requesting the CLOCK_SPEED_400_KHZ clocking rate.
The following code snippet shows how a you might support multiple versions of a product, each based on a different imp type, in the same application code by aliasing I²C peripherals to imp-specific objects.