1 /* Copyright 2018 Jack Humbert
2 * Copyright 2018 Yiancar
4 * This program is free sofare: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Sofare Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /* This library follows the convention of the AVR i2c_master library.
19 * As a result addresses are expected to be already shifted (addr << 1).
20 * I2CD1 is the default driver which corresponds to pins B6 and B7. This
22 * Please ensure that HAL_USE_I2C is TRUE in the halconf.h file and that
23 * STM32_I2C_USE_I2C1 is TRUE in the mcuconf.h file.
30 #define I2C1_SCL_BANK I2C1_BANK
31 #define I2C1_SDA_BANK I2C1_BANK
35 #define I2C1_SCL_BANK GPIOB
39 #define I2C1_SDA_BANK GPIOB
49 // The default PAL alternate modes are used to signal that the pins are used for I2C
50 #ifndef I2C1_SCL_PAL_MODE
51 #define I2C1_SCL_PAL_MODE 4
53 #ifndef I2C1_SDA_PAL_MODE
54 #define I2C1_SDA_PAL_MODE 4
57 // The default timing values below configures the I2C clock to 400khz assuming a 72Mhz clock
58 // For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
59 #ifndef I2C1_TIMINGR_PRESC
60 #define I2C1_TIMINGR_PRESC 15U
62 #ifndef I2C1_TIMINGR_SCLDEL
63 #define I2C1_TIMINGR_SCLDEL 4U
65 #ifndef I2C1_TIMINGR_SDADEL
66 #define I2C1_TIMINGR_SDADEL 2U
68 #ifndef I2C1_TIMINGR_SCLH
69 #define I2C1_TIMINGR_SCLH 15U
71 #ifndef I2C1_TIMINGR_SCLL
72 #define I2C1_TIMINGR_SCLL 21U
76 #define I2C_DRIVER I2CD1
79 typedef int16_t i2c_status_t;
81 #define I2C_STATUS_SUCCESS (0)
82 #define I2C_STATUS_ERROR (-1)
83 #define I2C_STATUS_TIMEOUT (-2)
86 i2c_status_t i2c_start(uint8_t address);
87 i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
88 i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
89 i2c_status_t i2c_transmit_receive(uint8_t address, uint8_t * tx_body, uint16_t tx_length, uint8_t * rx_body, uint16_t rx_length);
90 i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
91 i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t* regaddr, uint8_t* data, uint16_t length, uint16_t timeout);