Simple driver for the 12-bit DAC DAC7311 from TI
DAC7311.h@1:5497575badba, 2012-10-23 (annotated)
- Committer:
- macgyveremir
- Date:
- Tue Oct 23 19:07:26 2012 +0000
- Revision:
- 1:5497575badba
- Parent:
- 0:ca49770e05b5
Correct and working implementation. Can easily be generalized to family devices DACx311
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
macgyveremir | 0:ca49770e05b5 | 1 | #ifndef __DAC7311_H__ |
macgyveremir | 0:ca49770e05b5 | 2 | #define __DAC7311_H__ |
macgyveremir | 0:ca49770e05b5 | 3 | |
macgyveremir | 0:ca49770e05b5 | 4 | #include "mbed.h" |
macgyveremir | 0:ca49770e05b5 | 5 | |
macgyveremir | 0:ca49770e05b5 | 6 | #define DAC7311_SPI_MODE 1 |
macgyveremir | 0:ca49770e05b5 | 7 | |
macgyveremir | 0:ca49770e05b5 | 8 | // Bit masks and shifts |
macgyveremir | 0:ca49770e05b5 | 9 | #define PD0 (1<<14) |
macgyveremir | 0:ca49770e05b5 | 10 | #define PD1 (1<<15) |
macgyveremir | 0:ca49770e05b5 | 11 | #define conf_data_12(x) ((unsigned short)(x << 2) & 0x3FFC) |
macgyveremir | 0:ca49770e05b5 | 12 | |
macgyveremir | 0:ca49770e05b5 | 13 | // Operation modes |
macgyveremir | 0:ca49770e05b5 | 14 | #define DAC7311_OP_NORMAL 0 |
macgyveremir | 0:ca49770e05b5 | 15 | #define DAC7311_OP_SHUTDOWN_1K (PD0) |
macgyveremir | 0:ca49770e05b5 | 16 | #define DAC7311_OP_SHUTDOWN_100K (PD1) |
macgyveremir | 0:ca49770e05b5 | 17 | #define DAC7311_OP_SHUTDOWN_HIZ ( PD0 | PD1 ) |
macgyveremir | 0:ca49770e05b5 | 18 | |
macgyveremir | 0:ca49770e05b5 | 19 | union UI16toC_t |
macgyveremir | 0:ca49770e05b5 | 20 | { |
macgyveremir | 0:ca49770e05b5 | 21 | char bytes[sizeof(unsigned short)]; |
macgyveremir | 0:ca49770e05b5 | 22 | unsigned short value; |
macgyveremir | 0:ca49770e05b5 | 23 | }; |
macgyveremir | 0:ca49770e05b5 | 24 | |
macgyveremir | 0:ca49770e05b5 | 25 | class DAC7311 |
macgyveremir | 0:ca49770e05b5 | 26 | { |
macgyveremir | 0:ca49770e05b5 | 27 | SPI *spi; |
macgyveremir | 0:ca49770e05b5 | 28 | DigitalOut *sync; |
macgyveremir | 0:ca49770e05b5 | 29 | unsigned short value; |
macgyveremir | 0:ca49770e05b5 | 30 | unsigned short mode; |
macgyveremir | 0:ca49770e05b5 | 31 | |
macgyveremir | 0:ca49770e05b5 | 32 | public: |
macgyveremir | 0:ca49770e05b5 | 33 | |
macgyveremir | 0:ca49770e05b5 | 34 | DAC7311 (SPI *spi, DigitalOut *sync) : spi(spi), sync(sync), value(0), mode(DAC7311_OP_NORMAL) |
macgyveremir | 0:ca49770e05b5 | 35 | { *sync = 1; } |
macgyveremir | 0:ca49770e05b5 | 36 | |
macgyveremir | 0:ca49770e05b5 | 37 | void set_mode (unsigned short); |
macgyveremir | 0:ca49770e05b5 | 38 | void set_value (unsigned short); |
macgyveremir | 0:ca49770e05b5 | 39 | }; |
macgyveremir | 0:ca49770e05b5 | 40 | |
macgyveremir | 0:ca49770e05b5 | 41 | |
macgyveremir | 0:ca49770e05b5 | 42 | #endif /* __DAC7311_H__ */ |