mirror of
https://github.com/betaflight/betaflight.git
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103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
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* This file is part of Cleanflight and Betaflight.
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*
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* Cleanflight and Betaflight are free software. You can redistribute
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* this software and/or modify this software under the terms of the
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* GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option)
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* any later version.
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*
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* Cleanflight and Betaflight are distributed in the hope that they
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software.
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*
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h>
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#include "platform.h"
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#if defined(USE_I2C)
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#include "drivers/bus.h"
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#include "drivers/bus_i2c.h"
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#include "drivers/bus_i2c_busdev.h"
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static uint8_t i2cRegisteredDeviceCount = 0;
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bool i2cBusWriteRegister(const extDevice_t *dev, uint8_t reg, uint8_t data)
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{
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return i2cWrite(dev->bus->busType_u.i2c.device, dev->busType_u.i2c.address, reg, data);
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}
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bool i2cBusWriteRegisterStart(const extDevice_t *dev, uint8_t reg, uint8_t data)
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{
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// Need a static value, not on the stack
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static uint8_t byte;
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if (i2cBusy(dev->bus->busType_u.i2c.device, NULL)) {
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return false;
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}
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byte = data;
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return i2cWriteBuffer(dev->bus->busType_u.i2c.device, dev->busType_u.i2c.address, reg, sizeof(byte), &byte);
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}
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bool i2cBusReadRegisterBuffer(const extDevice_t *dev, uint8_t reg, uint8_t *data, uint8_t length)
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{
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return i2cRead(dev->bus->busType_u.i2c.device, dev->busType_u.i2c.address, reg, length, data);
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}
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uint8_t i2cBusReadRegister(const extDevice_t *dev, uint8_t reg)
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{
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uint8_t data;
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i2cRead(dev->bus->busType_u.i2c.device, dev->busType_u.i2c.address, reg, 1, &data);
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return data;
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}
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bool i2cBusReadRegisterBufferStart(const extDevice_t *dev, uint8_t reg, uint8_t *data, uint8_t length)
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{
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return i2cReadBuffer(dev->bus->busType_u.i2c.device, dev->busType_u.i2c.address, reg, length, data);
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}
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bool i2cBusBusy(const extDevice_t *dev, bool *error)
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{
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return i2cBusy(dev->bus->busType_u.i2c.device, error);
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}
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bool i2cBusSetInstance(extDevice_t *dev, uint32_t device)
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{
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// I2C bus structures to associate with external devices
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static busDevice_t i2cBus[I2CDEV_COUNT];
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if ((device < 1) || (device > I2CDEV_COUNT)) {
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return false;
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}
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dev->bus = &i2cBus[I2C_CFG_TO_DEV(device)];
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dev->bus->busType = BUS_TYPE_I2C;
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dev->bus->busType_u.i2c.device = I2C_CFG_TO_DEV(device);
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return true;
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}
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void i2cBusDeviceRegister(const extDevice_t *dev)
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{
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UNUSED(dev);
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i2cRegisteredDeviceCount++;
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}
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uint8_t i2cGetRegisteredDeviceCount(void)
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{
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return i2cRegisteredDeviceCount;
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}
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#endif
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