David Giles
This software drives a PCA9675 device via an I2C bus. Included functions allow you to read the device ID, set the IO direction, and read and write from the device.
Diff: Header/PCA9675.h
- Revision:
- 0:3331b5950572
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Header/PCA9675.h Tue Nov 23 10:59:14 2010 +0000
@@ -0,0 +1,46 @@
+#include "mbed.h"
+
+#ifndef PCA9675__
+#define PCA9675__
+#endif
+
+/* Define a class for PCA9675 */
+class PCA9675
+ {
+ /* Private members first */
+ private:
+ uint8_t My_Lcoal_Slave_Address;
+ uint8_t My_Local_Port0_Direction;
+ uint8_t My_Local_Port1_Direction;
+ sint32_t reset(); /* Reset the device using a general call */
+ I2C *My_Local_I2C; /* make use of the existing I2C class for i2C calls */
+
+ /* Public members next */
+ public:
+ PCA9675(I2C *Selected_I2C_Channel, uint8_t Slave_Address); /* Constructor - create with the slave address */
+ ~PCA9675(); /* Destructor */
+ sint32_t init(uint8_t port0_Direction, uint8_t port1_Direction); /* Reset the device and setup the IO direction */
+ sint32_t write_data(uint8_t port0_payload, uint8_t port1_payload); /* Write two bytes of data to the device */
+ sint32_t read_data(uint8_t *read_port0, uint8_t *read_port1); /* Read two bytes from the device */
+ sint32_t read_device_ID(uint8_t *manufacturer, uint16_t *part_ident, uint8_t *die_revision);
+ uint8_t read_slave_address(); /* Read the configured slave address */
+
+
+ enum PCA9675_Defines
+ {
+ eI2C_ACK = 0,
+ ePCA9675_RESET_COMMAND = 6,
+ ePCA9675_RESET_ADDRESS = 0,
+ ePCA9675_PORT0 = 0,
+ ePCA9675_PORT1 = 1,
+ eI2C_REPEATED_START = 1,
+ eI2C_NO_REPEATED_START = 0
+ };
+
+
+ };
+
+
+
+
+