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/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-03-12 Wangyuqiang the first version
*/
#include <board.h>
#include <string.h>
#include "drv_soft_spi.h"
#include "drv_config.h"
#if defined BSP_USING_SOFT_SPI
//#define DRV_DEBUG
#define LOG_TAG "drv.soft_spi"
#include <drv_log.h>
static struct ra_soft_spi_config soft_spi_config[] =
{
#ifdef BSP_USING_SOFT_SPI1
SOFT_SPI1_BUS_CONFIG,
#endif
#ifdef BSP_USING_SOFT_SPI2
SOFT_SPI2_BUS_CONFIG,
#endif
};
static struct ra_soft_spi spi_obj[sizeof(soft_spi_config) / sizeof(soft_spi_config[0])];
/**
* Attach the spi device to soft SPI bus, this function must be used after initialization.
*/
rt_err_t rt_soft_spi_device_attach(const char *bus_name, const char *device_name, rt_base_t cs_pin)
{
rt_err_t result;
struct rt_spi_device *spi_device;
/* attach the device to soft spi bus*/
spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
RT_ASSERT(spi_device != RT_NULL);
result = rt_spi_bus_attach_device_cspin(spi_device, device_name, bus_name, cs_pin, RT_NULL);
return result;
}
static void ra_spi_gpio_init(struct ra_soft_spi *spi)
{
struct ra_soft_spi_config *cfg = (struct ra_soft_spi_config *)spi->cfg;
rt_pin_mode(cfg->sck, PIN_MODE_OUTPUT);
rt_pin_mode(cfg->miso, PIN_MODE_INPUT);
rt_pin_mode(cfg->mosi, PIN_MODE_OUTPUT);
rt_pin_write(cfg->miso, PIN_HIGH);
rt_pin_write(cfg->sck, PIN_HIGH);
rt_pin_write(cfg->mosi, PIN_HIGH);
}
static void ra_tog_sclk(void *data)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
if(rt_pin_read(cfg->sck) == PIN_HIGH)
{
rt_pin_write(cfg->sck, PIN_LOW);
}
else
{
rt_pin_write(cfg->sck, PIN_HIGH);
}
}
static void ra_set_sclk(void *data, rt_int32_t state)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->sck, PIN_HIGH);
}
else
{
rt_pin_write(cfg->sck, PIN_LOW);
}
}
static void ra_set_mosi(void *data, rt_int32_t state)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->mosi, PIN_HIGH);
}
else
{
rt_pin_write(cfg->mosi, PIN_LOW);
}
}
static void ra_set_miso(void *data, rt_int32_t state)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
if (state)
{
rt_pin_write(cfg->miso, PIN_HIGH);
}
else
{
rt_pin_write(cfg->miso, PIN_LOW);
}
}
static rt_int32_t ra_get_sclk(void *data)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
return rt_pin_read(cfg->sck);
}
static rt_int32_t ra_get_mosi(void *data)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
return rt_pin_read(cfg->mosi);
}
static rt_int32_t ra_get_miso(void *data)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
return rt_pin_read(cfg->miso);
}
static void ra_dir_mosi(void *data, rt_int32_t state)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
if (state)
{
rt_pin_mode(cfg->mosi, PIN_MODE_INPUT);
}
else
{
rt_pin_mode(cfg->mosi, PIN_MODE_OUTPUT);
}
}
static void ra_dir_miso(void *data, rt_int32_t state)
{
struct ra_soft_spi_config* cfg = (struct ra_soft_spi_config*)data;
if (state)
{
rt_pin_mode(cfg->miso, PIN_MODE_INPUT);
}
else
{
rt_pin_mode(cfg->miso, PIN_MODE_OUTPUT);
}
}
static void ra_udelay(rt_uint32_t us)
{
rt_uint32_t ticks;
rt_uint32_t told, tnow, tcnt = 0;
rt_uint32_t reload = SysTick->LOAD;
ticks = us * reload / (1000000UL / RT_TICK_PER_SECOND);
told = SysTick->VAL;
while (1)
{
tnow = SysTick->VAL;
if (tnow != told)
{
if (tnow < told)
{
tcnt += told - tnow;
}
else
{
tcnt += reload - tnow + told;
}
told = tnow;
if (tcnt >= ticks)
{
break;
}
}
}
}
static void ra_pin_init(void)
{
rt_size_t obj_num = sizeof(spi_obj) / sizeof(struct ra_soft_spi);
for(rt_size_t i = 0; i < obj_num; i++)
{
ra_spi_gpio_init(&spi_obj[i]);
}
}
static struct rt_spi_bit_ops ra_soft_spi_ops =
{
.data = RT_NULL,
.pin_init = ra_pin_init,
.tog_sclk = ra_tog_sclk,
.set_sclk = ra_set_sclk,
.set_mosi = ra_set_mosi,
.set_miso = ra_set_miso,
.get_sclk = ra_get_sclk,
.get_mosi = ra_get_mosi,
.get_miso = ra_get_miso,
.dir_mosi = ra_dir_mosi,
.dir_miso = ra_dir_miso,
.udelay = ra_udelay,
.delay_us = 1,
};
/* Soft SPI initialization function */
int rt_hw_softspi_init(void)
{
rt_size_t obj_num = sizeof(spi_obj) / sizeof(struct ra_soft_spi);
rt_err_t result;
for (rt_size_t i = 0; i < obj_num; i++)
{
memcpy(&spi_obj[i].ops, &ra_soft_spi_ops, sizeof(struct rt_spi_bit_ops));
spi_obj[i].ops.data = (void *)&soft_spi_config[i];
spi_obj[i].spi.ops = &ra_soft_spi_ops;
spi_obj[i].cfg = (void *)&soft_spi_config[i];
result = rt_spi_bit_add_bus(&spi_obj[i].spi, soft_spi_config[i].bus_name, &spi_obj[i].ops);
RT_ASSERT(result == RT_EOK);
}
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_softspi_init);
#endif /* BSP_USING_SOFT_SPI */
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