kopia lustrzana https://github.com/micropython/micropython
97 wiersze
2.9 KiB
C
97 wiersze
2.9 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2024 NXP
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "board.h"
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/* SDK drivers */
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#include "fsl_lpi2c.h"
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#include "drv_i2c.h"
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int drv_i2c_init(drv_i2c_t *i2c, uint8_t id, drv_i2c_config_t *cfg) {
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i2c->instance = MCX_BoardGetI2CInstance(id);
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if (i2c->instance == NULL) {
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return -EINVAL;
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}
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i2c->id = id;
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int i2c_inputfreq = MCX_BoardConfigureI2CClock(id);
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if (i2c_inputfreq <= 0) {
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return -EINVAL;
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}
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lpi2c_master_config_t i2c_cfg;
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LPI2C_MasterGetDefaultConfig(&i2c_cfg);
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i2c_cfg.baudRate_Hz = cfg->frequency;
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LPI2C_Type *lpi2c = i2c->instance;
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LPI2C_MasterInit(lpi2c, &i2c_cfg, i2c_inputfreq);
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return 0;
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}
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int drv_i2c_write(drv_i2c_t *i2c, uint16_t addr, uint8_t *data, uint32_t len, uint32_t timeout, bool stop) {
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LPI2C_Type *lpi2c = i2c->instance;
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lpi2c_master_transfer_t xfer = {
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.direction = kLPI2C_Write,
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.slaveAddress = addr,
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.subaddress = 0,
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.subaddressSize = 0U,
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.data = data,
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.dataSize = len,
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.flags = stop ? kLPI2C_TransferDefaultFlag : kLPI2C_TransferNoStopFlag,
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};
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if (LPI2C_MasterTransferBlocking(lpi2c, &xfer) != kStatus_Success) {
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return -EIO;
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}
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return 0;
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}
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int drv_i2c_read(drv_i2c_t *i2c, uint16_t addr, uint8_t *data, uint32_t len, uint32_t timeout, bool stop) {
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LPI2C_Type *lpi2c = i2c->instance;
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lpi2c_master_transfer_t xfer = {
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.direction = kLPI2C_Read,
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.slaveAddress = addr,
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.subaddress = 0,
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.subaddressSize = 0U,
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.data = data,
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.dataSize = len,
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.flags = stop ? kLPI2C_TransferDefaultFlag : kLPI2C_TransferNoStopFlag,
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};
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if (LPI2C_MasterTransferBlocking(lpi2c, &xfer) != kStatus_Success) {
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return -EIO;
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}
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return 0;
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}
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