kopia lustrzana https://github.com/micropython/micropython
80 wiersze
2.6 KiB
C
80 wiersze
2.6 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2024 NXP
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "board.h"
|
|
|
|
/* SDK drivers */
|
|
#include "fsl_lpspi.h"
|
|
|
|
#include "drv_spi.h"
|
|
|
|
int drv_spi_init(drv_spi_t *spi, uint8_t id, drv_spi_config_t *cfg) {
|
|
spi->instance = MCX_BoardGetSPIInstance(id);
|
|
if (spi->instance == NULL) {
|
|
return -ENOENT;
|
|
}
|
|
|
|
spi->id = id;
|
|
|
|
int spi_inputfreq = MCX_BoardConfigureSPIClock(id);
|
|
if (spi_inputfreq <= 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
lpspi_master_config_t spi_cfg;
|
|
LPSPI_MasterGetDefaultConfig(&spi_cfg);
|
|
|
|
spi_cfg.baudRate = cfg->frequency;
|
|
spi_cfg.bitsPerFrame = cfg->frame_size;
|
|
spi_cfg.cpol = cfg->cpol ? kLPSPI_ClockPolarityActiveLow : kLPSPI_ClockPolarityActiveHigh;
|
|
spi_cfg.cpha = cfg->cpha ? kLPSPI_ClockPhaseSecondEdge : kLPSPI_ClockPhaseFirstEdge;
|
|
spi_cfg.direction = cfg->lsbfirst ? kLPSPI_LsbFirst : kLPSPI_MsbFirst;
|
|
|
|
LPSPI_Type *lpspi = spi->instance;
|
|
LPSPI_MasterInit(lpspi, &spi_cfg, spi_inputfreq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drv_spi_transfer(drv_spi_t *spi, drv_spi_transfer_t *transfer) {
|
|
LPSPI_Type *lpspi = spi->instance;
|
|
|
|
/* TODO: Ditch SDK drivers, prepare DMA transfer. */
|
|
|
|
lpspi_transfer_t xfer = {
|
|
.txData = (uint8_t *)transfer->tx_data, /* To SDK: Please do not touch that. */
|
|
.rxData = transfer->rx_data,
|
|
.dataSize = transfer->len,
|
|
};
|
|
|
|
status_t status = LPSPI_MasterTransferBlocking(lpspi, &xfer);
|
|
if (status != kStatus_Success) {
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|