Nick Ryder / MCP4822lib

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Dependents:   ADC2DAC

MCP4822.h@0:74353da3eacd, 2013-02-13 (annotated)

Committer:
NickRyder
Date:
Wed Feb 13 16:08:13 2013 +0000
Revision:
0:74353da3eacd
Child:
1:68b3a24fd2a4
Added documentation.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
NickRyder 0:74353da3eacd 1 #ifndef __MCP4822_H__
NickRyder 0:74353da3eacd 2 #define __MCP4822_H__
NickRyder 0:74353da3eacd 3
NickRyder 0:74353da3eacd 4 #include "mbed.h"
NickRyder 0:74353da3eacd 5
NickRyder 0:74353da3eacd 6 //! MCP4822 dual 12-bit DAC
NickRyder 0:74353da3eacd 7 class MCP4822 {
NickRyder 0:74353da3eacd 8 public:
NickRyder 0:74353da3eacd 9 /** Create an MCP4822 instance
NickRyder 0:74353da3eacd 10 * @param dataout SPI MOSI pin (should be p5 or p11)
NickRyder 0:74353da3eacd 11 * @param clock SPI clock pin (should be p7 or p13)
NickRyder 0:74353da3eacd 12 * @param chipselect SPI chip select pin (can be any)
NickRyder 0:74353da3eacd 13 * @param latch Latch pin updates the DAC out. Can be any pin or NC, if NC then the latch pin on the DAC chip should be held to GND.
NickRyder 0:74353da3eacd 14 */
NickRyder 0:74353da3eacd 15 MCP4822(PinName dataout, PinName clock, PinName chipselect, PinName latch);
NickRyder 0:74353da3eacd 16 //! Set output A to voltage
NickRyder 0:74353da3eacd 17 void setA(float voltage);
NickRyder 0:74353da3eacd 18 //! Set output B to voltage
NickRyder 0:74353da3eacd 19 void setB(float voltage);
NickRyder 0:74353da3eacd 20 //! Set both output A to voltageA and outputB to voltageB
NickRyder 0:74353da3eacd 21 void set(float voltageA, float voltageB);
NickRyder 0:74353da3eacd 22 //! Latch the stored values to the output pins
NickRyder 0:74353da3eacd 23 void latch();
NickRyder 0:74353da3eacd 24 //! shut down output from the DAC chip
NickRyder 0:74353da3eacd 25 void shutdown();
NickRyder 0:74353da3eacd 26 private:
NickRyder 0:74353da3eacd 27 DigitalOut cs, latchpin;
NickRyder 0:74353da3eacd 28 SPI spi;
NickRyder 0:74353da3eacd 29 void write(bool chanB, bool gain1, unsigned int voltage, bool shutdown = false);
NickRyder 0:74353da3eacd 30 void setvoltage(float voltage, bool chanB = false);
NickRyder 0:74353da3eacd 31 };
NickRyder 0:74353da3eacd 32
NickRyder 0:74353da3eacd 33
NickRyder 0:74353da3eacd 34 #endif