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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-05-22 Sherman first version
* 2020-11-02 xckhmf fixed bug
*/
#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 nrfx_drv_spi_config spi_config[] =
{
#ifdef BSP_USING_SPI0
NRFX_SPI0_CONFIG,
#endif
#ifdef BSP_USING_SPI1
NRFX_SPI1_CONFIG,
#endif
#ifdef BSP_USING_SPI2
NRFX_SPI2_CONFIG,
#endif
};
static struct nrfx_drv_spi spi_bus_obj[sizeof(spi_config) / sizeof(spi_config[0])];
//Configure SPI bus pins using the menuconfig
static struct nrfx_drv_spi_pin_config bsp_spi_pin[] =
{
#ifdef BSP_USING_SPI0
{
.sck_pin = BSP_SPI0_SCK_PIN,
.mosi_pin = BSP_SPI0_MOSI_PIN,
.miso_pin = BSP_SPI0_MISO_PIN,
.ss_pin = BSP_SPI0_SS_PIN
},
#endif
#ifdef BSP_USING_SPI1
{
.sck_pin = BSP_SPI1_SCK_PIN,
.mosi_pin = BSP_SPI1_MOSI_PIN,
.miso_pin = BSP_SPI1_MISO_PIN,
.ss_pin = BSP_SPI1_SS_PIN
},
#endif
#ifdef BSP_USING_SPI2
{
.sck_pin = BSP_SPI2_SCK_PIN,
.mosi_pin = BSP_SPI2_MOSI_PIN,
.miso_pin = BSP_SPI2_MISO_PIN,
.ss_pin = BSP_SPI2_SS_PIN
},
#endif
};
static rt_uint8_t spi_index_find(struct rt_spi_bus *spi_bus)
{
for (int i = 0; i < sizeof(spi_config) / sizeof(spi_config[0]); i++)
{
if(spi_bus == &spi_bus_obj[i].spi_bus)
return i;
}
return 0xFF;
}
/**
* spi event handler function
*/
static void spi0_handler(const nrfx_spi_evt_t *p_event, void *p_context)
{
LOG_I("\nspi0_handler");
}
static void spi1_handler(const nrfx_spi_evt_t *p_event, void *p_context)
{
LOG_I("\nspi1_handler");
}
static void spi2_handler(const nrfx_spi_evt_t *p_event, void *p_context)
{
LOG_I("\nspi2_handler");
}
nrfx_spi_evt_handler_t spi_handler[] = {spi0_handler, spi1_handler, spi2_handler};
/**
* @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);
rt_uint8_t index = spi_index_find(device->bus);
RT_ASSERT(index != 0xFF);
nrfx_spi_t spi = spi_bus_obj[index].spi;
nrfx_spi_config_t config = NRFX_SPI_DEFAULT_CONFIG(bsp_spi_pin[index].sck_pin,
bsp_spi_pin[index].mosi_pin, bsp_spi_pin[index].miso_pin, NRFX_SPI_PIN_NOT_USED);
/* spi config ss pin */
if(device->parent.user_data != RT_NULL)
{
nrf_gpio_cfg_output((uint32_t)device->parent.user_data);
}
/* spi config bit order */
if(configuration->mode & RT_SPI_MSB)
{
config.bit_order = NRF_SPI_BIT_ORDER_MSB_FIRST;
}
else
{
config.bit_order = NRF_SPI_BIT_ORDER_LSB_FIRST;
}
/* spi mode config */
switch (configuration->mode & RT_SPI_MODE_3 )
{
case RT_SPI_MODE_0/* RT_SPI_CPOL:0 , RT_SPI_CPHA:0 */:
config.mode = NRF_SPI_MODE_0;
break;
case RT_SPI_MODE_1/* RT_SPI_CPOL:0 , RT_SPI_CPHA:1 */:
config.mode = NRF_SPI_MODE_1;
break;
case RT_SPI_MODE_2/* RT_SPI_CPOL:1 , RT_SPI_CPHA:0 */:
config.mode = NRF_SPI_MODE_2;
break;
case RT_SPI_MODE_3/* RT_SPI_CPOL:1 , RT_SPI_CPHA:1 */:
config.mode = NRF_SPI_MODE_3;
break;
default:
LOG_E("spi_configure mode error %x\n",configuration->mode);
return RT_ERROR;
}
/* spi frequency config */
switch (configuration->max_hz / 1000)
{
case 125:
config.frequency = NRF_SPI_FREQ_125K;
break;
case 250:
config.frequency = NRF_SPI_FREQ_250K;
break;
case 500:
config.frequency = NRF_SPI_FREQ_500K;
break;
case 1000:
config.frequency = NRF_SPI_FREQ_1M;
break;
case 2000:
config.frequency = NRF_SPI_FREQ_2M;
break;
case 4000:
config.frequency = NRF_SPI_FREQ_4M;
break;
case 8000:
config.frequency = NRF_SPI_FREQ_8M;
break;
default:
LOG_E("spi_configure rate error %d\n",configuration->max_hz);
break;
}
rt_memcpy((void*)&spi_bus_obj[index].spi_config, (void*)&config, sizeof(nrfx_spi_config_t));
nrfx_spi_evt_handler_t handler = RT_NULL; //spi send callback handler ,default NULL
void * context = RT_NULL;
nrfx_err_t nrf_ret = nrfx_spi_init(&spi, &config, handler, context);
if(NRFX_SUCCESS == nrf_ret)
return RT_EOK;
return RT_ERROR;
}
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);
rt_uint8_t index = spi_index_find(device->bus);
nrfx_err_t nrf_ret;
RT_ASSERT(index != 0xFF);
nrfx_spi_t * p_instance = &spi_bus_obj[index].spi;
nrfx_spi_xfer_desc_t p_xfer_desc;
if(message->cs_take == 1)
{
nrf_gpio_pin_clear((uint32_t)device->parent.user_data);
}
p_xfer_desc.p_rx_buffer = message->recv_buf;
p_xfer_desc.rx_length = message->length;
p_xfer_desc.p_tx_buffer = message->send_buf;
p_xfer_desc.tx_length = message->length ;
if(message->send_buf == RT_NULL)
{
p_xfer_desc.tx_length = 0;
}
if(message->recv_buf == RT_NULL)
{
p_xfer_desc.rx_length = 0;
}
nrf_ret = nrfx_spi_xfer(p_instance, &p_xfer_desc, 0);
if(message->cs_release == 1)
{
nrf_gpio_pin_set((uint32_t)device->parent.user_data);
}
if( NRFX_SUCCESS != nrf_ret)
{
return 0;
}
else
{
return message->length;
}
}
/* 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 = spi_config[i].spi;
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 ss_pin)
{
RT_ASSERT(bus_name != RT_NULL);
RT_ASSERT(device_name != RT_NULL);
RT_ASSERT(ss_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*)ss_pin);
if (result != RT_EOK)
{
LOG_E("%s attach to %s faild, %d", device_name, bus_name, result);
result = RT_ERROR;
}
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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