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rt-thread-official/bsp/essemi/es32f0334/drivers/drv_spi.c

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/*
* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-03-19 wangyq the first version
* 2019-11-01 wangyq update libraries
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <string.h>
#include <rthw.h>
#include "board.h"
#include "drv_spi.h"
#include <ald_spi.h>
#include <ald_gpio.h>
#include <ald_cmu.h>
#ifdef RT_USING_SPI
#define SPITIMEOUT 0x0FFF
rt_err_t spi_configure(struct rt_spi_device *device,
struct rt_spi_configuration *cfg)
{
spi_handle_t *hspi;
hspi = (spi_handle_t *)device->bus->parent.user_data;
/* config spi mode */
if (cfg->mode & RT_SPI_SLAVE)
{
hspi->init.mode = SPI_MODE_SLAVER;
}
else
{
hspi->init.mode = SPI_MODE_MASTER;
}
if (cfg->mode & RT_SPI_3WIRE)
{
hspi->init.dir = SPI_DIRECTION_1LINE;
}
else
{
hspi->init.dir = SPI_DIRECTION_2LINES;
}
if (cfg->data_width == 8)
{
hspi->init.data_size = SPI_DATA_SIZE_8;
}
else if (cfg->data_width == 16)
{
hspi->init.data_size = SPI_DATA_SIZE_16;
}
if (cfg->mode & RT_SPI_CPHA)
{
hspi->init.phase = SPI_CPHA_SECOND;
}
else
{
hspi->init.phase = SPI_CPHA_FIRST;
}
if (cfg->mode & RT_SPI_CPOL)
{
hspi->init.polarity = SPI_CPOL_HIGH;
}
else
{
hspi->init.polarity = SPI_CPOL_LOW;
}
if (cfg->mode & RT_SPI_NO_CS)
{
hspi->init.ss_en = DISABLE;
}
else
{
hspi->init.ss_en = ENABLE;
}
/* config spi clock */
if (cfg->max_hz >= ald_cmu_get_pclk1_clock() / 2)
{
/* pclk1 max speed 48MHz, spi master max speed 10MHz */
if (ald_cmu_get_pclk1_clock() / 2 <= 10000000)
{
hspi->init.baud = SPI_BAUD_2;
}
else if (ald_cmu_get_pclk1_clock() / 4 <= 10000000)
{
hspi->init.baud = SPI_BAUD_4;
}
else
{
hspi->init.baud = SPI_BAUD_8;
}
}
else if (cfg->max_hz >= ald_cmu_get_pclk1_clock() / 4)
{
/* pclk1 max speed 48MHz, spi master max speed 10MHz */
if (ald_cmu_get_pclk1_clock() / 4 <= 10000000)
{
hspi->init.baud = SPI_BAUD_4;
}
else
{
hspi->init.baud = SPI_BAUD_8;
}
}
else if (cfg->max_hz >= ald_cmu_get_pclk1_clock() / 8)
{
hspi->init.baud = SPI_BAUD_8;
}
else if (cfg->max_hz >= ald_cmu_get_pclk1_clock() / 16)
{
hspi->init.baud = SPI_BAUD_16;
}
else if (cfg->max_hz >= ald_cmu_get_pclk1_clock() / 32)
{
hspi->init.baud = SPI_BAUD_32;
}
else if (cfg->max_hz >= ald_cmu_get_pclk1_clock() / 64)
{
hspi->init.baud = SPI_BAUD_64;
}
else if (cfg->max_hz >= ald_cmu_get_pclk1_clock() / 128)
{
hspi->init.baud = SPI_BAUD_128;
}
else
{
hspi->init.baud = SPI_BAUD_256;
}
ald_spi_init(hspi);
return RT_EOK;
}
static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
{
rt_err_t res;
spi_handle_t *hspi;
struct es32f0_hw_spi_cs *cs;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(device->bus != RT_NULL);
RT_ASSERT(device->bus->parent.user_data != RT_NULL);
RT_ASSERT(message->send_buf != RT_NULL || message->recv_buf != RT_NULL);
hspi = (spi_handle_t *)device->bus->parent.user_data;
cs = device->parent.user_data;
/* only send data */
if (message->recv_buf == RT_NULL)
{
if (message->cs_take)
{
rt_pin_write(cs->pin, 0);
}
res = ald_spi_send(hspi, (rt_uint8_t *)message->send_buf, (rt_int32_t)message->length, SPITIMEOUT);
if (message->cs_release)
{
rt_pin_write(cs->pin, 1);
}
if (res != RT_EOK)
return RT_ERROR;
}
/* only receive data */
if (message->send_buf == RT_NULL)
{
if (message->cs_take)
{
rt_pin_write(cs->pin, 0);
}
res = ald_spi_recv(hspi, (rt_uint8_t *)message->recv_buf, (rt_int32_t)message->length, SPITIMEOUT);
if (message->cs_release)
{
rt_pin_write(cs->pin, 1);
}
if (res != RT_EOK)
return RT_ERROR;
}
/* send & receive */
else
{
if (message->cs_take)
{
rt_pin_write(cs->pin, 0);
}
res = ald_spi_send_recv(hspi, (rt_uint8_t *)message->send_buf, (rt_uint8_t *)message->recv_buf,
(rt_int32_t)message->length, SPITIMEOUT);
if (message->cs_release)
{
rt_pin_write(cs->pin, 1);
}
if (res != RT_EOK)
return RT_ERROR;
}
return message->length;
}
const struct rt_spi_ops es32f0_spi_ops =
{
spi_configure,
spixfer,
};
static struct rt_spi_bus _spi_bus0, _spi_bus1;
static spi_handle_t _spi0, _spi1;
int es32f0_spi_register_bus(SPI_TypeDef *SPIx, const char *name)
{
struct rt_spi_bus *spi_bus;
spi_handle_t *spi;
gpio_init_t gpio_instruct;
if (SPIx == SPI0)
{
_spi0.perh = SPI0;
spi_bus = &_spi_bus0;
spi = &_spi0;
/* SPI0 gpio init */
gpio_instruct.mode = GPIO_MODE_OUTPUT;
gpio_instruct.odos = GPIO_PUSH_PULL;
gpio_instruct.func = GPIO_FUNC_4;
gpio_instruct.type = GPIO_TYPE_CMOS;
gpio_instruct.flt = GPIO_FILTER_DISABLE;
/* PB3->SPI0_SCK, PB5->SPI0_MOSI */
ald_gpio_init(GPIOB, GPIO_PIN_3 | GPIO_PIN_5, &gpio_instruct);
/* PB4->SPI0_MISO */
gpio_instruct.mode = GPIO_MODE_INPUT;
ald_gpio_init(GPIOB, GPIO_PIN_4, &gpio_instruct);
}
else if (SPIx == SPI1)
{
_spi1.perh = SPI1;
spi_bus = &_spi_bus1;
spi = &_spi1;
/* SPI1 gpio init */
gpio_instruct.mode = GPIO_MODE_OUTPUT;
gpio_instruct.odos = GPIO_PUSH_PULL;
gpio_instruct.func = GPIO_FUNC_4;
gpio_instruct.type = GPIO_TYPE_CMOS;
gpio_instruct.flt = GPIO_FILTER_DISABLE;
/* PB13->SPI1_SCK, PB15->SPI1_MOSI */
ald_gpio_init(GPIOB, GPIO_PIN_13 | GPIO_PIN_15, &gpio_instruct);
/* PB14->SPI1_MISO */
gpio_instruct.mode = GPIO_MODE_INPUT;
ald_gpio_init(GPIOB, GPIO_PIN_14, &gpio_instruct);
}
else
{
return -1;
}
spi_bus->parent.user_data = spi;
return rt_spi_bus_register(spi_bus, name, &es32f0_spi_ops);
}
rt_err_t es32f0_spi_device_attach(rt_uint32_t pin, const char *bus_name, const char *device_name)
{
/* define spi Instance */
struct rt_spi_device *spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
RT_ASSERT(spi_device != RT_NULL);
struct es32f0_hw_spi_cs *cs_pin = (struct es32f0_hw_spi_cs *)rt_malloc(sizeof(struct es32f0_hw_spi_cs));
RT_ASSERT(cs_pin != RT_NULL);
cs_pin->pin = pin;
rt_pin_mode(pin, PIN_MODE_OUTPUT);
rt_pin_write(pin, 1);
return rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin);
}
int rt_hw_spi_init(void)
{
int result = 0;
#ifdef BSP_USING_SPI0
result = es32f0_spi_register_bus(SPI0, "spi0");
#endif
#ifdef BSP_USING_SPI1
result = es32f0_spi_register_bus(SPI1, "spi1");
#endif
return result;
}
INIT_BOARD_EXPORT(rt_hw_spi_init);
#endif
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