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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-07-18 Rbb666 first version
*/
#include <drv_spi.h>
#ifdef RT_USING_SPI
//#define DRV_DEBUG
#define DBG_TAG "drv.spi"
#ifdef DRV_DEBUG
#define DBG_LVL DBG_LOG
#else
#define DBG_LVL DBG_INFO
#endif /* DRV_DEBUG */
#include <rtdbg.h>
struct ifx_sw_spi_cs
{
rt_uint32_t pin;
};
#ifdef BSP_USING_SPI3
static struct rt_spi_bus spi_bus3;
#endif
static struct ifx_spi spi_bus_obj[] =
{
#ifdef BSP_USING_SPI3
{
.bus_name = "spi3",
.spi_bus = &spi_bus3,
.sck_pin = GET_PIN(6, 2),
.miso_pin = GET_PIN(6, 1),
.mosi_pin = GET_PIN(6, 0),
},
#endif
};
/* private rt-thread spi ops function */
static rt_err_t spi_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message);
static struct rt_spi_ops ifx_spi_ops =
{
.configure = spi_configure,
.xfer = spixfer,
};
static void ifx_spi_init(struct ifx_spi *ifx_spi)
{
int result = RT_EOK;
result = cyhal_spi_init(ifx_spi->spi_obj, ifx_spi->mosi_pin, ifx_spi->miso_pin, ifx_spi->sck_pin,
NC, NULL, ifx_spi->spi_obj->data_bits, ifx_spi->spi_obj->mode, false);
RT_ASSERT(result != RT_ERROR);
rt_kprintf("[%s] Freq:[%d]HZ\n", ifx_spi->bus_name, ifx_spi->freq);
result = cyhal_spi_set_frequency(ifx_spi->spi_obj, ifx_spi->freq);
RT_ASSERT(result != CYHAL_SPI_RSLT_CLOCK_ERROR);
}
static rt_err_t spi_configure(struct rt_spi_device *device,
struct rt_spi_configuration *configuration)
{
struct rt_spi_bus *spi_bus = (struct rt_spi_bus *)device->bus;
struct ifx_spi *spi_device = (struct ifx_spi *)spi_bus->parent.user_data;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(configuration != RT_NULL);
/* data_width */
if (configuration->data_width <= 8)
{
spi_device->spi_obj->data_bits = 8;
}
else if (configuration->data_width <= 16)
{
spi_device->spi_obj->data_bits = 16;
}
else
{
return RT_EIO;
}
uint32_t max_hz;
max_hz = configuration->max_hz;
spi_device->freq = max_hz;
/* MSB or LSB */
switch (configuration->mode & RT_SPI_MODE_3)
{
case RT_SPI_MODE_0:
spi_device->spi_obj->mode = CYHAL_SPI_MODE_00_MSB;
break;
case RT_SPI_MODE_1:
spi_device->spi_obj->mode = CYHAL_SPI_MODE_01_MSB;
break;
case RT_SPI_MODE_2:
spi_device->spi_obj->mode = CYHAL_SPI_MODE_10_MSB;
break;
case RT_SPI_MODE_3:
spi_device->spi_obj->mode = CYHAL_SPI_MODE_11_MSB;
break;
}
ifx_spi_init(spi_device);
return RT_EOK;
}
static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
{
RT_ASSERT(device != NULL);
RT_ASSERT(message != NULL);
struct rt_spi_bus *spi_bus = (struct rt_spi_bus *)device->bus;
struct ifx_spi *spi_device = (struct ifx_spi *)spi_bus->parent.user_data;
struct rt_spi_configuration *config = &device->config;
struct ifx_sw_spi_cs *cs = device->parent.user_data;
/* take CS */
if (message->cs_take)
{
cyhal_gpio_write(cs->pin, PIN_LOW);
LOG_D("spi take cs\n");
}
int result = RT_EOK;
if (message->length > 0)
{
if (message->send_buf == RT_NULL && message->recv_buf != RT_NULL)
{
/**< receive message */
result = cyhal_spi_transfer(spi_device->spi_obj, RT_NULL, 0x00, message->recv_buf, message->length, 0x00);
}
else if (message->send_buf != RT_NULL && message->recv_buf == RT_NULL)
{
/**< send message */
result = cyhal_spi_transfer(spi_device->spi_obj, message->send_buf, message->length, RT_NULL, 0x00, 0x00);
}
else if (message->send_buf != RT_NULL && message->recv_buf != RT_NULL)
{
/**< send and receive message */
result = cyhal_spi_transfer(spi_device->spi_obj, message->send_buf, message->length, message->recv_buf, message->length, 0x00);
}
}
if (message->cs_release && !(device->config.mode & RT_SPI_NO_CS))
{
if (device->config.mode & RT_SPI_CS_HIGH)
cyhal_gpio_write(cs->pin, PIN_LOW);
else
cyhal_gpio_write(cs->pin, PIN_HIGH);
}
return message->length;
}
rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, uint16_t cs_gpio_pin)
{
RT_ASSERT(bus_name != RT_NULL);
RT_ASSERT(device_name != 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);
struct ifx_sw_spi_cs *cs_pin = (struct ifx_sw_spi_cs *)rt_malloc(sizeof(struct ifx_sw_spi_cs));
RT_ASSERT(cs_pin != RT_NULL);
cs_pin->pin = cs_gpio_pin;
if (cs_pin->pin != 0x00)
{
/* initialize the cs pin & select the slave*/
cyhal_gpio_init(cs_pin->pin, CYHAL_GPIO_DIR_OUTPUT, CYHAL_GPIO_DRIVE_STRONG, 1);
cyhal_gpio_write(cs_pin->pin, PIN_HIGH);
}
result = rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin);
RT_ASSERT(spi_device != RT_NULL);
return result;
}
int rt_hw_spi_init(void)
{
int result = RT_EOK;
for (int i = 0; i < sizeof(spi_bus_obj) / sizeof(spi_bus_obj[0]); i++)
{
spi_bus_obj[i].spi_obj = rt_malloc(sizeof(cyhal_spi_t));
RT_ASSERT(spi_bus_obj[i].spi_obj != RT_NULL);
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, &ifx_spi_ops);
RT_ASSERT(result == RT_EOK);
LOG_D("%s bus init done", spi_bus_obj[i].bus_name);
LOG_D("MOSI PIN:[%d], MISO PIN[%d], CLK PIN[%d]\n",
spi_bus_obj[i].mosi_pin, spi_bus_obj[i].miso_pin,
spi_bus_obj[i].sck_pin);
}
return result;
}
INIT_BOARD_EXPORT(rt_hw_spi_init);
#endif /* RT_USING_SPI */
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