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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-02-14 supperthomas first version
*/
#include <stdint.h>
#include <string.h>
#include "board.h"
#include "drv_spi.h"
#define DBG_LEVEL DBG_LOG
#include <rtdbg.h>
#define LOG_TAG "drv.spi"
#ifdef BSP_USING_SPI
#if defined(BSP_USING_SPI0) || defined(BSP_USING_SPI1) || defined(BSP_USING_SPI2)
static struct mcu_drv_spi_config spi_config[] =
{
#ifdef BSP_USING_SPI0
MCU_SPI0_CONFIG,
#endif
#ifdef BSP_USING_SPI1
MCU_SPI1_CONFIG,
#endif
};
static struct mcu_drv_spi spi_bus_obj[sizeof(spi_config) / sizeof(spi_config[0])];
/**
* @brief This function config spi bus
* @param device
* @param configuration
* @retval RT_EOK / -RT_ERROR
*/
static rt_err_t spi_configure(struct rt_spi_device *device,
struct rt_spi_configuration *configuration)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(device->bus != RT_NULL);
RT_ASSERT(device->bus->parent.user_data != RT_NULL);
RT_ASSERT(configuration != RT_NULL);
struct mcu_drv_spi *tmp_spi;
tmp_spi = rt_container_of(device->bus, struct mcu_drv_spi, spi_bus);
int mode;
///init
switch (configuration->mode & RT_SPI_MODE_3)
{
case RT_SPI_MODE_0/* RT_SPI_CPOL:0 , RT_SPI_CPHA:0 */:
case RT_SPI_MODE_1/* RT_SPI_CPOL:0 , RT_SPI_CPHA:1 */:
case RT_SPI_MODE_2/* RT_SPI_CPOL:1 , RT_SPI_CPHA:0 */:
case RT_SPI_MODE_3/* RT_SPI_CPOL:1 , RT_SPI_CPHA:1 */:
mode = configuration->mode & RT_SPI_MODE_3;
break;
default:
LOG_E("spi_configure mode error %x\n", configuration->mode);
return -RT_ERROR;
}
tmp_spi->spixfer_req.width = SPI17Y_WIDTH_1;
tmp_spi->spixfer_req.bits = configuration->data_width;
tmp_spi->spixfer_req.ssel = 0;
tmp_spi->spixfer_req.deass = 1;
tmp_spi->spixfer_req.tx_num = 0;
tmp_spi->spixfer_req.rx_num = 0;
tmp_spi->spixfer_req.callback = NULL;
LOG_D("spi init mode:%d, rate:%d", mode, configuration->max_hz);
if (SPI_Init(tmp_spi->spi_instance, mode, configuration->max_hz) != 0)
{
LOG_E("Error configuring SPI\n");
while (1) {}
}
//init
return RT_EOK;
}
static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(device->bus != RT_NULL);
RT_ASSERT(device->bus->parent.user_data != RT_NULL);
int ret = 0;
struct mcu_drv_spi *tmp_spi;
tmp_spi = rt_container_of(device->bus, struct mcu_drv_spi, spi_bus);
tmp_spi->spixfer_req.tx_data = message->send_buf;
tmp_spi->spixfer_req.rx_data = message->recv_buf;
tmp_spi->spixfer_req.len = message->length;
ret = SPI_MasterTrans(tmp_spi->spi_instance, &tmp_spi->spixfer_req);
if (ret == E_NO_ERROR)
{
return message->length;
}
else
{
LOG_E("spixfer faild, ret %d", ret);
return 0;
}
}
/* spi bus callback function */
static const struct rt_spi_ops nrfx_spi_ops =
{
.configure = spi_configure,
.xfer = spixfer,
};
/*spi bus init*/
static int rt_hw_spi_bus_init(void)
{
rt_err_t result = -RT_ERROR;
for (int i = 0; i < sizeof(spi_config) / sizeof(spi_config[0]); i++)
{
spi_bus_obj[i].spi_instance = spi_config[i].spi_instance;
spi_bus_obj[i].spi_bus.parent.user_data = &spi_config[i]; //SPI INSTANCE
result = rt_spi_bus_register(&spi_bus_obj[i].spi_bus, spi_config[i].bus_name, &nrfx_spi_ops);
RT_ASSERT(result == RT_EOK);
}
return result;
}
int rt_hw_spi_init(void)
{
return rt_hw_spi_bus_init();
}
INIT_BOARD_EXPORT(rt_hw_spi_init);
/**
* Attach the spi device to SPI bus, this function must be used after initialization.
*/
rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint32_t cs_pin)
{
RT_ASSERT(bus_name != RT_NULL);
RT_ASSERT(device_name != RT_NULL);
RT_ASSERT(cs_pin != RT_NULL);
rt_err_t result;
struct rt_spi_device *spi_device;
/* attach the device to spi bus*/
spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
RT_ASSERT(spi_device != RT_NULL);
/* initialize the cs pin */
result = rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin);
if (result != RT_EOK)
{
LOG_E("%s attach to %s faild, %d", device_name, bus_name, result);
result = -RT_ERROR;
}
/* TODO: SET THE GPIO */
RT_ASSERT(result == RT_EOK);
return result;
}
#endif /* BSP_USING_SPI0 || BSP_USING_SPI1 || BSP_USING_SPI2 */
#endif /*BSP_USING_SPI*/
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