Initial commit
Diff: mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/TARGET_UBLOX_C030/min_battery_voltage.c
- Revision:
- 0:bb348c97df44
diff -r 000000000000 -r bb348c97df44 mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/TARGET_UBLOX_C030/min_battery_voltage.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/TARGET_UBLOX_C030/min_battery_voltage.c Wed Sep 16 01:11:49 2020 +0000 @@ -0,0 +1,73 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2017 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "min_battery_voltage.h" + +/** Defining HAL_MspInit strong function + * in user defined file as described in documentation + */ + +void HAL_MspInit(void) +{ + set_minimum_battery_voltage(); +} + +void set_minimum_battery_voltage() +{ + i2c_t i2c_obj = {0}; + int data_read; + i2c_init(&i2c_obj, I2C_SDA_B, I2C_SCL_B); + i2c_frequency(&i2c_obj, I2C_FREQUENCY); + + if (read_from_i2c(BQ24295_I2C_ADDRESS, 0, &data_read, i2c_obj)) { + data_read = data_read & MIN_BATTERY_VOLTAGE_MASK; + write_to_i2c(BQ24295_I2C_ADDRESS, 0, data_read, i2c_obj); + //Battery Voltage is set to 3880mV + } else { + // Minimum battery voltage could not be set. This is not a critical error, no need to stop execution + // It simply means that longer cabling or USB ports with lower output voltages may cause problems. + } +} + +char write_to_i2c(int slave_addr, int reg_addr, int data_write, i2c_t i2c_obj) +{ + char ret_code = 0; + if (!i2c_start(&i2c_obj)) { + if ((i2c_byte_write(&i2c_obj, slave_addr << 1) == 1) && + (i2c_byte_write(&i2c_obj, reg_addr) == 1) && + (i2c_byte_write(&i2c_obj,data_write) ==1)) { + ret_code = 1; + } + i2c_stop(&i2c_obj); + } + return ret_code; +} + +char read_from_i2c(int slave_addr, int reg_addr, int* data_read, i2c_t i2c_obj) +{ + char ret_code = 0; + if (!i2c_start(&i2c_obj)) { + if ((i2c_byte_write(&i2c_obj,(slave_addr << 1))==1) && + (i2c_byte_write(&i2c_obj, reg_addr)==1) && + (!i2c_start(&i2c_obj)) && + (i2c_byte_write(&i2c_obj, ((slave_addr << 1) | 0x01)) == 1)) { + *data_read = i2c_byte_read(&i2c_obj,1); + ret_code = 1; + } + i2c_stop(&i2c_obj); + } + return ret_code; +}