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/*
* Copyright (c) 2006-2024 RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2024-10-08 wumingzi first implementation
* 2024-10-08 wumingzi add custom configuration and support muti spi obj
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <time.h>
#include "rtdef.h"
#include "rttypes.h"
#include "sdkconfig.h"
#include "hal/spi_hal.h" /*bsp/ESP32_C3/packages/ESP-IDF-latest/components/hal/include/hal/spi_types.h*/
#include "driver/gpio.h" /*bsp/ESP32_C3/packages/ESP-IDF-latest/components/driver/include/driver/gpio.h*/
#include "driver/spi_master.h"
#include "drv_spi.h"
#include "drivers/dev_spi.h"
#ifdef RT_USING_SPI
#ifdef BSP_USING_SPI2
#define LOG_TAG "drv.spi"
#include <rtdbg.h>
static struct rt_spi_bus spi_bus2;
static spi_device_handle_t spi;
static spi_bus_config_t buscfg;
static struct esp32_spi spi_bus_obj[] = {
#ifdef BSP_USING_SPI2
{
.bus_name = "spi2",
.spi_bus = &spi_bus2,
.esp32_spi_bus_cfg = &buscfg,
},
#endif /* BSP_USING_SPI2 */
};
/* private rt-thread spi ops function */
static rt_err_t spi_configure(struct rt_spi_device* device, struct rt_spi_configuration* configuration);
static rt_ssize_t spixfer(struct rt_spi_device* device, struct rt_spi_message* message);
static struct rt_spi_ops esp32_spi_ops =
{
.configure = spi_configure,
.xfer = spixfer,
};
/**
* @brief SPI Initialization
* @param esp32_spi: SPI BUS
* @retval None
*/
static void esp32_spi_init(struct esp32_spi *esp32_spi)
{
spi_configure(NULL,NULL);
}
static rt_err_t spi_configure(struct rt_spi_device* device,
struct rt_spi_configuration* configuration)
{
static spi_bus_config_t buscfg =
{
.miso_io_num=SPI2_IOMUX_PIN_NUM_MISO, /*MISO*/
.mosi_io_num=SPI2_IOMUX_PIN_NUM_MOSI, /*MOSI*/
.sclk_io_num=SPI2_IOMUX_PIN_NUM_CLK, /*CLK*/
.quadwp_io_num=-1, /*不使用*/
.quadhd_io_num=-1, /*不使用*/
.max_transfer_sz=4092 /*最大传送数据长度*/
};
esp_err_t err = spi_bus_initialize(SPI2_HOST, &buscfg, SPI_DMA_CH_AUTO);
ESP_ERROR_CHECK(err);
static spi_device_interface_config_t devcfg;
if(configuration->data_width == 8)
{
size_t length; /*/< Total data length, in bits*/
size_t rxlength; /*/< Total data length received, should be not greater than ``length`` in full-duplex mode (0 defaults this to the value of ``length``)*/
}
LOG_W("configuration->max_hz = %d \n",configuration->max_hz);
if(configuration->max_hz >= SPI_MASTER_FREQ_80M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_80M; /*/< 80MHz*/
}
else if(configuration->max_hz >= SPI_MASTER_FREQ_40M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_40M; /*/< 40MHz*/
}
else if(configuration->max_hz >= SPI_MASTER_FREQ_26M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_26M; /*/< 26.67MHz*/
}
else if(configuration->max_hz >= SPI_MASTER_FREQ_20M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_20M; /*/< 20MHz*/
}
else if(configuration->max_hz >= SPI_MASTER_FREQ_16M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_16M; /*/< 16MHz*/
}
else if(configuration->max_hz >= SPI_MASTER_FREQ_13M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_13M; /*/< 13.33MHz*/
}
else if(configuration->max_hz >= SPI_MASTER_FREQ_11M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_11M; /*/< 11.43MHz*/
}
else if(configuration->max_hz >= SPI_MASTER_FREQ_10M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_10M; /*/< 10MHz*/
}
else if(configuration->max_hz >= SPI_MASTER_FREQ_9M)
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_9M ; /*/< 8.89MHz*/
}
else
{
devcfg.clock_speed_hz = SPI_MASTER_FREQ_8M ;
}
switch (configuration->mode)
{
case RT_SPI_MODE_0: /*!< CPOL = 0, CPHA = 0 */
devcfg.mode = 0;
case RT_SPI_MODE_1: /*!< CPOL = 0, CPHA = 1 */
devcfg.mode = 1;
case RT_SPI_MODE_2: /*!< CPOL = 1, CPHA = 0 */
devcfg.mode = 2;
case RT_SPI_MODE_3: /*!< CPOL = 1, CPHA = 1 */
devcfg.mode = 3;
default:
devcfg.mode = 0;
}
/* todo: support changing cs_pin,queue_size or specifing spi_device_interface_config_t and
* spi_transaction_t by resever data.Meanwhile finish the initialization of interrupt
* callback function and dma.
*/
devcfg.spics_io_num = RT_BSP_SPI_CS_PIN;
devcfg.queue_size = 7;
err = spi_bus_add_device(SPI2_HOST, &devcfg, &spi);
ESP_ERROR_CHECK(err);
/* Although there is only one spi bus object, it will be a template for other bsps of ESP32 series */
for(int i = 0; i < sizeof(spi_bus_obj)/sizeof(spi_bus_obj[0]); i++)
{
spi_bus_obj[i].bus_name = "spi2";
spi_bus_obj[i].spi_bus = &spi_bus2;
spi_bus_obj[i].esp32_spi_bus_cfg = &buscfg;
}
return RT_EOK;
};
static rt_ssize_t spixfer(struct rt_spi_device* device, struct rt_spi_message* message)
{
RT_ASSERT(device != NULL);
RT_ASSERT(message != NULL);
static spi_transaction_t trans;
trans.tx_buffer = message->send_buf;
trans.rx_buffer = message->recv_buf;
trans.length = (message->length)*8;
trans.rxlength = (message->length)*8;
spi_device_acquire_bus(spi, portMAX_DELAY);
esp_err_t err = spi_device_polling_transmit(spi, &trans);
spi_device_release_bus(spi);
ESP_ERROR_CHECK(err);
return RT_EOK;
};
/**
* 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_base_t cs_pin)
{
RT_ASSERT(bus_name != RT_NULL);
RT_ASSERT(device_name != RT_NULL);
rt_err_t result;rt_device_t busp = RT_NULL;
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);
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\n", device_name, bus_name, result);
}
RT_ASSERT(result == RT_EOK);
LOG_D("%s attach to %s done", device_name, bus_name);
return result;
}
int rt_hw_spi_init(void)
{
int result = 0;
for(int i = 0; i < sizeof(spi_bus_obj)/sizeof(spi_bus_obj[0]); i++)
{
spi_bus_obj[i].spi_bus->parent.user_data = (void *)&spi_bus_obj[i];
result = rt_spi_bus_register(spi_bus_obj[i].spi_bus, spi_bus_obj[i].bus_name, &esp32_spi_ops);
RT_ASSERT(result == RT_EOK);
LOG_D("%s bus init done", spi_bus_obj[i].bus_name);
}
return result;
}
INIT_BOARD_EXPORT(rt_hw_spi_init);
#endif /* BSP_USING_SPI0 || BSP_USING_SPI1 || BSP_USING_SPI2 || BSP_USING_SPI3 || BSP_USING_SPI4*/
#endif /* RT_USING_SPI */
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