diff options
Diffstat (limited to 'driver_fw/ina226.h')
| -rw-r--r-- | driver_fw/ina226.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/driver_fw/ina226.h b/driver_fw/ina226.h new file mode 100644 index 0000000..405be48 --- /dev/null +++ b/driver_fw/ina226.h @@ -0,0 +1,84 @@ +#ifndef __INA226_H__ +#define __INA226_H__ + +#include <stdint.h> + +#define INA226_I2C_PERIPH I2C1 +#define INA226_I2C_ADDR 0x80 + +#define INA226_I_LSB_uA 2000 +#define INA226_RSHUNT_uOhm 2000 +/* FIXME validate this */ +#define INA226_CAL (5120000 / INA226_I_LSB_uA * 1000 / INA226_RSHUNT_uOhm) + +enum ina226_reg { + INA226_REG_CONFIG = 0x00, + INA226_REG_VS = 0x01, + INA226_REG_VB = 0x02, + INA226_REG_P = 0x03, + INA226_REG_I = 0x04, + INA226_REG_CAL = 0x05, + INA226_REG_MASK_EN = 0x06, + INA226_REG_ALERT = 0x07, + INA226_REG_MFGID = 0xfe, + INA226_REG_DIEID = 0xff +}; + +enum ina226_config { + INA226_CONFIG_RST = 1<<15, + + INA226_CONFIG_AVG_Pos = 9, + INA226_CONFIG_AVG_Msk = 3<<9, + INA226_CONFIG_AVG_1 = 0<<9, + INA226_CONFIG_AVG_4 = 1<<9, + INA226_CONFIG_AVG_16 = 2<<9, + INA226_CONFIG_AVG_64 = 3<<9, + INA226_CONFIG_AVG_128 = 4<<9, + INA226_CONFIG_AVG_256 = 5<<9, + INA226_CONFIG_AVG_512 = 6<<9, + INA226_CONFIG_AVG_1024 = 7<<9, + + INA226_CONFIG_VBUSCT_Pos = 6, + INA226_CONFIG_VBUSCT_Msk = 7<<6, + INA226_CONFIG_VBUSCT_140u = 0<<6, + INA226_CONFIG_VBUSCT_204u = 1<<6, + INA226_CONFIG_VBUSCT_332u = 2<<6, + INA226_CONFIG_VBUSCT_588u = 3<<6, + INA226_CONFIG_VBUSCT_1m1 = 4<<6, + INA226_CONFIG_VBUSCT_2m116 = 5<<6, + INA226_CONFIG_VBUSCT_4m156 = 6<<6, + INA226_CONFIG_VBUSCT_8m244 = 7<<6, + + INA226_CONFIG_VSHCT_Pos = 3, + INA226_CONFIG_VSHCT_Msk = 7<<3, + INA226_CONFIG_VSHCT_140u = 0<<3, + INA226_CONFIG_VSHCT_204u = 1<<3, + INA226_CONFIG_VSHCT_332u = 2<<3, + INA226_CONFIG_VSHCT_588u = 3<<3, + INA226_CONFIG_VSHCT_1m1 = 4<<3, + INA226_CONFIG_VSHCT_2m116 = 5<<3, + INA226_CONFIG_VSHCT_4m156 = 6<<3, + INA226_CONFIG_VSHCT_8m244 = 7<<3, + + INA226_CONFIG_MODE_Pos = 0, + INA226_CONFIG_MODE_Msk = 7, + INA226_CONFIG_MODE_POWERDOWN = 0, + + INA226_CONFIG_MODE_SHUNT = 1, + + INA226_CONFIG_MODE_BUS = 2, + + INA226_CONFIG_MODE_TRIG = 0, + INA226_CONFIG_MODE_CONT = 4 +}; + +void ina226_init(void); +void ina226_write_reg(uint8_t reg, uint16_t val); +uint16_t ina226_read_reg(uint8_t reg); + +static inline int16_t ina226_read_i(void) { return (int16_t)ina226_read_reg(INA226_REG_I); } +static inline int16_t ina226_read_v(void) { return (int16_t)ina226_read_reg(INA226_REG_VB); } +static inline uint16_t ina226_read_p(void) { return ina226_read_reg(INA226_REG_P); } +static inline int16_t ina226_read_vs(void) { return (int16_t)ina226_read_reg(INA226_REG_VS); } + +#endif /* __INA226_H__ */ |