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annotate Small_CPU/Inc/i2c.h @ 319:d8e86af78474 fix-version

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bugfix: correct packed main version number in dive header This fixes a rather mysterious bug. Users report that up to 1.3.5 beta, a correct version number is shown in libdivecomputer based applications (like in Subsurface, in the extra data tab). Careful examining the code in both libdivecomputer and the firmware shows a subtle error in the bit mask and shift operation to pack a full X.Y.Z.beta version number in 2 bytes (as is available in the dive header) in the firmware end (as the libdivecomputer code looks sane, assuming this is the right way to pack things). Likely, this bug crept in in the conversion from the closed source Keil period into the open source GCC setup of the code base. So its impossible to document the exact history of this problem here. Further notice that the main version number is only 1 of 3 version numbers, denoting the full version of the firmware (besides Font and RTE). Finally notice that this way of packing is limited to 2^5 bits (decimal 32), so we could easily build a 1.4.21, but not a 1.4.55. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Wed, 19 Jun 2019 14:31:50 +0200
parents 9ecc2e60418d
children cb3870f79e9d
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1 /* Define to prevent recursive inclusion -------------------------------------*/
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2 #ifndef I2C_H
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3 #define I2C_H
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5 /* Pressure Sensor */
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6 #define DEVICE_PRESSURE 0xEE // 2019 hardware (gen 3) will use 0xEC (MS5837), all other use 0xEE (MS5803)
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8 /* Compass/Accelerometer */
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9 #define DEVICE_ACCELARATOR_MMA8452Q 0x38 // Hardware gen 1 (Two chip solution with MMA8452Q and HMC5883L)
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10 #define DEVICE_COMPASS_HMC5883L 0x3C // Hardware gen 1
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12 #define DEVICE_COMPASS_303D 0x3C // Hardware gen 2 (Single chip solution LSM303D)
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13 #define DEVICE_COMPASS_303AGR 0x3C // Hardware gen 3 (Single chip solution LSM303AGR)
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15 /* Battery Gas Gauge */
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16 #define DEVICE_BATTERYGAUGE 0xC8 // LTC2941 battery gauge
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19 /* Includes ------------------------------------------------------------------*/
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20 #include "stm32f4xx_hal.h"
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21
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22 HAL_StatusTypeDef I2C_Master_Transmit( uint16_t DevAddress, uint8_t *pData, uint16_t Size);
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23 HAL_StatusTypeDef I2C_Master_TransmitNoStop( uint16_t DevAddress, uint8_t *pData, uint16_t Size);
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24 HAL_StatusTypeDef I2C_Master_Receive( uint16_t DevAddress, uint8_t *pData, uint16_t Size);
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25 HAL_StatusTypeDef MX_I2C1_Init(void);
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26 void I2C_DeInit(void);
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27 HAL_StatusTypeDef I2C1_Status(void);
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29 GPIO_PinState MX_I2C1_TestAndClear(void);
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31 //void I2C_Error(void);
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34 #endif /* I2C_H */