Initial commit
mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/TARGET_UBLOX_C030/min_battery_voltage.c@0:bb348c97df44, 2020-09-16 (annotated)
- Committer:
- lypinator
- Date:
- Wed Sep 16 01:11:49 2020 +0000
- Revision:
- 0:bb348c97df44
Added PWM
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
lypinator | 0:bb348c97df44 | 1 | /* mbed Microcontroller Library |
lypinator | 0:bb348c97df44 | 2 | * Copyright (c) 2006-2017 ARM Limited |
lypinator | 0:bb348c97df44 | 3 | * |
lypinator | 0:bb348c97df44 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
lypinator | 0:bb348c97df44 | 5 | * you may not use this file except in compliance with the License. |
lypinator | 0:bb348c97df44 | 6 | * You may obtain a copy of the License at |
lypinator | 0:bb348c97df44 | 7 | * |
lypinator | 0:bb348c97df44 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
lypinator | 0:bb348c97df44 | 9 | * |
lypinator | 0:bb348c97df44 | 10 | * Unless required by applicable law or agreed to in writing, software |
lypinator | 0:bb348c97df44 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
lypinator | 0:bb348c97df44 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
lypinator | 0:bb348c97df44 | 13 | * See the License for the specific language governing permissions and |
lypinator | 0:bb348c97df44 | 14 | * limitations under the License. |
lypinator | 0:bb348c97df44 | 15 | */ |
lypinator | 0:bb348c97df44 | 16 | |
lypinator | 0:bb348c97df44 | 17 | #include "min_battery_voltage.h" |
lypinator | 0:bb348c97df44 | 18 | |
lypinator | 0:bb348c97df44 | 19 | /** Defining HAL_MspInit strong function |
lypinator | 0:bb348c97df44 | 20 | * in user defined file as described in documentation |
lypinator | 0:bb348c97df44 | 21 | */ |
lypinator | 0:bb348c97df44 | 22 | |
lypinator | 0:bb348c97df44 | 23 | void HAL_MspInit(void) |
lypinator | 0:bb348c97df44 | 24 | { |
lypinator | 0:bb348c97df44 | 25 | set_minimum_battery_voltage(); |
lypinator | 0:bb348c97df44 | 26 | } |
lypinator | 0:bb348c97df44 | 27 | |
lypinator | 0:bb348c97df44 | 28 | void set_minimum_battery_voltage() |
lypinator | 0:bb348c97df44 | 29 | { |
lypinator | 0:bb348c97df44 | 30 | i2c_t i2c_obj = {0}; |
lypinator | 0:bb348c97df44 | 31 | int data_read; |
lypinator | 0:bb348c97df44 | 32 | i2c_init(&i2c_obj, I2C_SDA_B, I2C_SCL_B); |
lypinator | 0:bb348c97df44 | 33 | i2c_frequency(&i2c_obj, I2C_FREQUENCY); |
lypinator | 0:bb348c97df44 | 34 | |
lypinator | 0:bb348c97df44 | 35 | if (read_from_i2c(BQ24295_I2C_ADDRESS, 0, &data_read, i2c_obj)) { |
lypinator | 0:bb348c97df44 | 36 | data_read = data_read & MIN_BATTERY_VOLTAGE_MASK; |
lypinator | 0:bb348c97df44 | 37 | write_to_i2c(BQ24295_I2C_ADDRESS, 0, data_read, i2c_obj); |
lypinator | 0:bb348c97df44 | 38 | //Battery Voltage is set to 3880mV |
lypinator | 0:bb348c97df44 | 39 | } else { |
lypinator | 0:bb348c97df44 | 40 | // Minimum battery voltage could not be set. This is not a critical error, no need to stop execution |
lypinator | 0:bb348c97df44 | 41 | // It simply means that longer cabling or USB ports with lower output voltages may cause problems. |
lypinator | 0:bb348c97df44 | 42 | } |
lypinator | 0:bb348c97df44 | 43 | } |
lypinator | 0:bb348c97df44 | 44 | |
lypinator | 0:bb348c97df44 | 45 | char write_to_i2c(int slave_addr, int reg_addr, int data_write, i2c_t i2c_obj) |
lypinator | 0:bb348c97df44 | 46 | { |
lypinator | 0:bb348c97df44 | 47 | char ret_code = 0; |
lypinator | 0:bb348c97df44 | 48 | if (!i2c_start(&i2c_obj)) { |
lypinator | 0:bb348c97df44 | 49 | if ((i2c_byte_write(&i2c_obj, slave_addr << 1) == 1) && |
lypinator | 0:bb348c97df44 | 50 | (i2c_byte_write(&i2c_obj, reg_addr) == 1) && |
lypinator | 0:bb348c97df44 | 51 | (i2c_byte_write(&i2c_obj,data_write) ==1)) { |
lypinator | 0:bb348c97df44 | 52 | ret_code = 1; |
lypinator | 0:bb348c97df44 | 53 | } |
lypinator | 0:bb348c97df44 | 54 | i2c_stop(&i2c_obj); |
lypinator | 0:bb348c97df44 | 55 | } |
lypinator | 0:bb348c97df44 | 56 | return ret_code; |
lypinator | 0:bb348c97df44 | 57 | } |
lypinator | 0:bb348c97df44 | 58 | |
lypinator | 0:bb348c97df44 | 59 | char read_from_i2c(int slave_addr, int reg_addr, int* data_read, i2c_t i2c_obj) |
lypinator | 0:bb348c97df44 | 60 | { |
lypinator | 0:bb348c97df44 | 61 | char ret_code = 0; |
lypinator | 0:bb348c97df44 | 62 | if (!i2c_start(&i2c_obj)) { |
lypinator | 0:bb348c97df44 | 63 | if ((i2c_byte_write(&i2c_obj,(slave_addr << 1))==1) && |
lypinator | 0:bb348c97df44 | 64 | (i2c_byte_write(&i2c_obj, reg_addr)==1) && |
lypinator | 0:bb348c97df44 | 65 | (!i2c_start(&i2c_obj)) && |
lypinator | 0:bb348c97df44 | 66 | (i2c_byte_write(&i2c_obj, ((slave_addr << 1) | 0x01)) == 1)) { |
lypinator | 0:bb348c97df44 | 67 | *data_read = i2c_byte_read(&i2c_obj,1); |
lypinator | 0:bb348c97df44 | 68 | ret_code = 1; |
lypinator | 0:bb348c97df44 | 69 | } |
lypinator | 0:bb348c97df44 | 70 | i2c_stop(&i2c_obj); |
lypinator | 0:bb348c97df44 | 71 | } |
lypinator | 0:bb348c97df44 | 72 | return ret_code; |
lypinator | 0:bb348c97df44 | 73 | } |