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annotate Small_CPU/Inc/pressure.h @ 328:4fe5400567e7 I2C_Improvment

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Set I2C speed to 88kHz, use digital filter only and reworked idle clock recovery The errata describes a possible problem in operation between 88kHz and 100kHz => Set speed as recommended as work around. Based on reference implementation only one filter should be use. Choice was digital because only drawback is lag of wakeup functionality which is not used I2C communication may be randomly interrupted e.g. by a RTE reset or firmware update => reworked recovery function to get I2C devices in idle state again (Clk and SDA HIGH)
author ideenmodellierer
date Wed, 17 Jul 2019 22:42:15 +0200
parents 8e9c502c0b06
children 37f45300bc2e
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1 /* Define to prevent recursive inclusion -------------------------------------*/
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2 #ifndef PRESSURE_H
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3 #define PRESSURE_H
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5 #include <stdint.h>
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7 uint8_t init_pressure(void);
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8 uint8_t pressure_update(void);
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9 void pressure_update_alternating(void);
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11 uint8_t is_init_pressure_done(void);
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13 HAL_StatusTypeDef pressure_sensor_get_pressure_raw(void);
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14 HAL_StatusTypeDef pressure_sensor_get_temperature_raw(void);
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15 void pressure_calculation(void);
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17 float get_temperature(void);
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18 float get_pressure_mbar(void);
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19 float get_surface_mbar(void);
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21 void init_surface_ring(void);
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22 void update_surface_pressure(uint8_t call_rhythm_seconds);
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24 uint32_t demo_modify_temperature_and_pressure(int32_t divetime_in_seconds, uint8_t subseconds, float ceiling_mbar);
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26 #endif /* PRESSURE_H */
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