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.
31 #if defined(STM32F1XX) || defined(STM32F1xx) || defined(STM32F2xx) || defined(STM32F4xx) || defined(STM32L0xx) || defined(STM32L1xx)
36 #define I2C1_SCL_BANK I2C1_BANK
37 #define I2C1_SDA_BANK I2C1_BANK
41 #define I2C1_SCL_BANK GPIOB
45 #define I2C1_SDA_BANK GPIOB
57 #define I2C1_OPMODE OPMODE_I2C
59 #ifndef I2C1_CLOCK_SPEED
60 #define I2C1_CLOCK_SPEED 100000 /* 400000 */
62 #ifndef I2C1_DUTY_CYCLE
63 #define I2C1_DUTY_CYCLE STD_DUTY_CYCLE /* FAST_DUTY_CYCLE_2 */
66 // The default PAL alternate modes are used to signal that the pins are used for I2C
67 #ifndef I2C1_SCL_PAL_MODE
68 #define I2C1_SCL_PAL_MODE 4
70 #ifndef I2C1_SDA_PAL_MODE
71 #define I2C1_SDA_PAL_MODE 4
74 // The default timing values below configures the I2C clock to 400khz assuming a 72Mhz clock
75 // For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
76 #ifndef I2C1_TIMINGR_PRESC
77 #define I2C1_TIMINGR_PRESC 15U
79 #ifndef I2C1_TIMINGR_SCLDEL
80 #define I2C1_TIMINGR_SCLDEL 4U
82 #ifndef I2C1_TIMINGR_SDADEL
83 #define I2C1_TIMINGR_SDADEL 2U
85 #ifndef I2C1_TIMINGR_SCLH
86 #define I2C1_TIMINGR_SCLH 15U
88 #ifndef I2C1_TIMINGR_SCLL
89 #define I2C1_TIMINGR_SCLL 21U
94 #define I2C_DRIVER I2CD1
97 typedef int16_t i2c_status_t;
99 #define I2C_STATUS_SUCCESS (0)
100 #define I2C_STATUS_ERROR (-1)
101 #define I2C_STATUS_TIMEOUT (-2)
104 i2c_status_t i2c_start(uint8_t address);
105 i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
106 i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
107 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);
108 i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
109 i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);