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16f859dafd
This makes life easier when calling e.g. `saul_reg_write()` with data stored in flash. As now the signatures for reading and writing differ (in that `const` qualifier only), `saul_notsup()` is split into `saul_write_notsup()` and `saul_read_notsup()`. However, one is implemented as a symbol alias of the other, so that ROM consumption remains unchanged.
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/*
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* Copyright 2019 Otto-von-Guericke-Universität Magdeburg
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup drivers_ltc4150
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* @{
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*
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* @file
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* @brief SAUL adaption for LTC4150 devices
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*
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* @author Marian Buschsieweke <marian.buschsieweke@ovgu.de>
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*
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* @}
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include "phydat.h"
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#include "saul.h"
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#include "ltc4150.h"
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static int read_charge(const void *_dev, phydat_t *res)
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{
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ltc4150_dev_t *dev = (ltc4150_dev_t *)_dev;
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int32_t temp[3];
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if (ltc4150_charge(dev, (uint32_t *)&temp[1], (uint32_t *)&temp[2]) == 0) {
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res->scale = -3;
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res->unit = UNIT_COULOMB;
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temp[0] = temp[2] - temp[1];
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int dim = (gpio_is_valid(dev->params.polarity)) ? 3 : 1;
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phydat_fit(res, temp, (unsigned)dim);
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return dim;
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}
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return -ECANCELED;
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}
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static int read_current(const void *dev, phydat_t *res)
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{
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if (ltc4150_avg_current((ltc4150_dev_t *)dev, res->val) == 0) {
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res->unit = UNIT_A;
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res->scale = -4;
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return 1;
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}
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return -ECANCELED;
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}
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const saul_driver_t ltc4150_saul_charge_driver = {
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.read = read_charge,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_CHARGE
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};
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const saul_driver_t ltc4150_saul_current_driver = {
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.read = read_current,
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.write = saul_write_notsup,
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.type = SAUL_SENSE_CURRENT
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};
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