123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/*
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* Copyright (c) 2006-2024 RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2024-09-04 Yilin Sun Initial version
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*/
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#include <rtdevice.h>
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#include "fsl_spi.h"
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#include "drv_spi.h"
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#define BSP_DEFAULT_SPI_FREQUENCY (500000U)
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typedef struct
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{
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struct rt_spi_bus parent;
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SPI_Type *instance;
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uint32_t input_frequency;
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} mcx_spi_obj_t;
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typedef struct
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{
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SPI_Type *instance;
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uint8_t id;
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} mcx_spi_instance_t;
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static const mcx_spi_instance_t mcx_spi_instances[] =
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{
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#ifdef BSP_USING_SPI0
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{SPI0, 0},
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#endif
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#ifdef BSP_USING_SPI1
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{SPI1, 1},
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#endif
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};
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static mcx_spi_obj_t mcx_spi_list[ARRAY_SIZE(mcx_spi_instances)];
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static rt_ssize_t mcx_spi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
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{
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spi_transfer_t xfer =
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{
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.txData = message->send_buf,
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.rxData = message->recv_buf,
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.dataSize = message->length,
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.flags = 0UL,
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};
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mcx_spi_obj_t *spi = device->bus->parent.user_data;
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if (message->cs_take)
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{
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rt_pin_write(device->cs_pin, PIN_LOW);
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}
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SPI_MasterTransferBlocking(spi->instance, &xfer);
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if (message->cs_release)
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{
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rt_pin_write(device->cs_pin, PIN_HIGH);
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}
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return message->length;
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}
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static rt_err_t mcx_spi_configure(struct rt_spi_device *device, struct rt_spi_configuration *cfg)
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{
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mcx_spi_obj_t *spi = device->bus->parent.user_data;
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SPI_MasterSetBaudRate(spi->instance, cfg->max_hz, spi->input_frequency);
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return RT_EOK;
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}
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static struct rt_spi_ops mcx_spi_ops =
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{
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.configure = mcx_spi_configure,
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.xfer = mcx_spi_xfer,
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};
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rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint32_t pin)
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{
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struct rt_spi_device *spi_device = rt_malloc(sizeof(struct rt_spi_device));
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if (!spi_device)
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{
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return -RT_ENOMEM;
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}
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return rt_spi_bus_attach_device_cspin(spi_device, device_name, bus_name, pin, NULL);
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}
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int rt_hw_spi_init(void)
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{
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for (size_t i = 0; i < ARRAY_SIZE(mcx_spi_instances); i++)
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{
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char name_buf[16];
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/* TODO: Initialize SPI interface here. */
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mcx_spi_list[i].instance = mcx_spi_instances[i].instance;
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mcx_spi_list[i].input_frequency = CLOCK_GetCoreSysClkFreq();
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mcx_spi_list[i].parent.parent.user_data = &mcx_spi_list[i];
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spi_master_config_t cfg;
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SPI_MasterGetDefaultConfig(&cfg);
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SPI_MasterInit(mcx_spi_list[i].instance, &cfg, mcx_spi_list[i].input_frequency);
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rt_snprintf(name_buf, sizeof(name_buf), "spi%d", mcx_spi_instances[i].id);
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rt_spi_bus_register(&mcx_spi_list[i].parent, name_buf, &mcx_spi_ops);
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}
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return 0;
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}
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INIT_DEVICE_EXPORT(rt_hw_spi_init);
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