1 files changed, 53 insertions, 12 deletions

diff --git a/docs/i2c_driver.md b/docs/i2c_driver.md
index 3ec34a0f8..95c588af4 100644
--- a/docs/i2c_driver.md
+++ b/docs/i2c_driver.md
@@ -62,16 +62,13 @@ Then, modify your board's `mcuconf.h` to enable the peripheral you've chosen, fo
 
 Configuration-wise, you'll need to set up the peripheral as per your MCU's datasheet -- the defaults match the pins for a Proton-C, i.e. STM32F303.
 
-|`config.h` Overrride    |Description                                                                                |Default|
-|------------------------|-------------------------------------------------------------------------------------------|-------|
-|`I2C_DRIVER`            |I2C peripheral to use - I2C1 -> `I2CD1`, I2C2 -> `I2CD2` etc.                              |`I2CD1`|
-|`I2C1_BANK` (deprecated)|The bank of pins (`GPIOA`, `GPIOB`, `GPIOC`), superseded by `I2C1_SCL_BANK`/`I2C1_SDA_BANK`|`GPIOB`|
-|`I2C1_SCL_BANK`         |The bank of pins (`GPIOA`, `GPIOB`, `GPIOC`) to use for SCL                                |`GPIOB`|
-|`I2C1_SCL`              |The pin number for SCL (0-15)                                                              |`6`    |
-|`I2C1_SCL_PAL_MODE`     |The alternate function mode for SCL                                                        |`4`    |
-|`I2C1_SDA_BANK`         |The bank of pins (`GPIOA`, `GPIOB`, `GPIOC`) to use for SDA                                |`GPIOB`|
-|`I2C1_SDA`              |The pin number for SDA (0-15)                                                              |`7`    |
-|`I2C1_SDA_PAL_MODE`     |The alternate function mode for SDA                                                        |`4`    |
+|`config.h` Overrride    |Description                                                   |Default|
+|------------------------|--------------------------------------------------------------|-------|
+|`I2C_DRIVER`            |I2C peripheral to use - I2C1 -> `I2CD1`, I2C2 -> `I2CD2` etc. |`I2CD1`|
+|`I2C1_SCL_PIN`          |The pin definition for SCL                                    |`B6`   |
+|`I2C1_SCL_PAL_MODE`     |The alternate function mode for SCL                           |`4`    |
+|`I2C1_SDA_PIN`          |The pin definition for SDA                                    |`B7`   |
+|`I2C1_SDA_PAL_MODE`     |The alternate function mode for SDA                           |`4`    |
 
 The following configuration values depend on the specific MCU in use.
 
@@ -190,7 +187,7 @@ Receive multiple bytes from the selected SPI device.
 
 ### `i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)`
 
-Writes to a register on the I2C device.
+Writes to a register with an 8-bit address on the I2C device.
 
 #### Arguments
 
@@ -211,9 +208,32 @@ Writes to a register on the I2C device.
 
 ---
 
+### `i2c_status_t i2c_writeReg16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)`
+
+Writes to a register with a 16-bit address (big endian) on the I2C device.
+
+#### Arguments
+
+ - `uint8_t devaddr`  
+   The 7-bit I2C address of the device.
+ - `uint16_t regaddr`  
+   The register address to write to.
+ - `uint8_t *data`  
+   A pointer to the data to transmit.
+ - `uint16_t length`  
+ The number of bytes to write. Take care not to overrun the length of `data`.
+ - `uint16_t timeout`  
+   The time in milliseconds to wait for a response from the target device.
+
+#### Return Value
+
+`I2C_STATUS_TIMEOUT` if the timeout period elapses, `I2C_STATUS_ERROR` if some other error occurs, otherwise `I2C_STATUS_SUCCESS`.
+
+---
+
 ### `i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)`
 
-Reads from a register on the I2C device.
+Reads from a register with an 8-bit address on the I2C device.
 
 #### Arguments
 
@@ -232,6 +252,27 @@ Reads from a register on the I2C device.
 
 ---
 
+### `i2c_status_t i2c_readReg16(uint8_t devaddr, uint16_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout)`
+
+Reads from a register with a 16-bit address (big endian) on the I2C device.
+
+#### Arguments
+
+ - `uint8_t devaddr`  
+   The 7-bit I2C address of the device.
+ - `uint16_t regaddr`  
+   The register address to read from.
+ - `uint16_t length`  
+ The number of bytes to read. Take care not to overrun the length of `data`.
+ - `uint16_t timeout`  
+   The time in milliseconds to wait for a response from the target device.
+
+#### Return Value
+
+`I2C_STATUS_TIMEOUT` if the timeout period elapses, `I2C_STATUS_ERROR` if some other error occurs, otherwise `I2C_STATUS_SUCCESS`.
+
+---
+
 ### `i2c_status_t i2c_stop(void)`
 
 Stop the current I2C transaction.