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Diffstat (limited to 'bsps/include/libchip/i2c-ds1621.h')
| -rw-r--r-- | bsps/include/libchip/i2c-ds1621.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/bsps/include/libchip/i2c-ds1621.h b/bsps/include/libchip/i2c-ds1621.h new file mode 100644 index 0000000000..64df69f465 --- /dev/null +++ b/bsps/include/libchip/i2c-ds1621.h @@ -0,0 +1,81 @@ +#ifndef I2C_DS_1621_DRIVER_H +#define I2C_DS_1621_DRIVER_H + +/* Trivial i2c driver for the maxim DS1621 temperature sensor; + * just implements reading constant conversions with 8-bit + * resolution. + * Demonstrates the implementation of a i2c high-level driver. + */ + +/* + * Authorship + * ---------- + * This software was created by + * Till Straumann <strauman@slac.stanford.edu>, 2005, + * Stanford Linear Accelerator Center, Stanford University. + * + * Acknowledgement of sponsorship + * ------------------------------ + * This software was produced by + * the Stanford Linear Accelerator Center, Stanford University, + * under Contract DE-AC03-76SFO0515 with the Department of Energy. + * + * Government disclaimer of liability + * ---------------------------------- + * Neither the United States nor the United States Department of Energy, + * nor any of their employees, makes any warranty, express or implied, or + * assumes any legal liability or responsibility for the accuracy, + * completeness, or usefulness of any data, apparatus, product, or process + * disclosed, or represents that its use would not infringe privately owned + * rights. + * + * Stanford disclaimer of liability + * -------------------------------- + * Stanford University makes no representations or warranties, express or + * implied, nor assumes any liability for the use of this software. + * + * Stanford disclaimer of copyright + * -------------------------------- + * Stanford University, owner of the copyright, hereby disclaims its + * copyright and all other rights in this software. Hence, anyone may + * freely use it for any purpose without restriction. + * + * Maintenance of notices + * ---------------------- + * In the interest of clarity regarding the origin and status of this + * SLAC software, this and all the preceding Stanford University notices + * are to remain affixed to any copy or derivative of this software made + * or distributed by the recipient and are to be affixed to any copy of + * software made or distributed by the recipient that contains a copy or + * derivative of this software. + * + * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 + */ + +#define DS1621_CMD_READ_TEMP 0xaa +#define DS1621_CMD_CSR_ACCESS 0xac +#define DS1621_CMD_START_CONV 0xee + +/* CSR bits */ +#define DS1621_CSR_DONE (1<<7) +#define DS1621_CSR_TEMP_HI (1<<6) /* T >= hi register */ +#define DS1621_CSR_TEMP_LO (1<<5) /* T <= lo register */ +#define DS1621_CSR_NVMEM_BSY (1<<4) /* non-volatile memory busy */ +#define DS1621_CSR_OUT_POL (1<<1) /* Thermostat output active polarity */ +#define DS1621_CSR_1SHOT (1<<0) /* Oneshot mode */ + +#include <rtems.h> +#include <rtems/libi2c.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/* for registration with libi2c */ +extern rtems_libi2c_drv_t *i2c_ds1621_driver_descriptor; + +#ifdef __cplusplus +} +#endif + +#endif |