libs/rt-thread
libs
/
rt-thread
4
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
rt-thread/bsp/Infineon/libraries/HAL_Drivers/drv_spi.c

292 lines
8.4 KiB
C
Raw Blame History

/*
* 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
* 2023-03-30 Rbb666 update spi driver
*/
#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>
#ifdef BSP_USING_SPI0
static struct rt_spi_bus spi_bus0;
#endif
#ifdef BSP_USING_SPI3
static struct rt_spi_bus spi_bus3;
#endif
#ifdef BSP_USING_SPI6
static struct rt_spi_bus spi_bus6;
#endif
static struct ifx_spi_handle spi_bus_obj[] =
{
#if defined(BSP_USING_SPI0)
{
.bus_name = "spi0",
.sck_pin = GET_PIN(0, 4),
.miso_pin = GET_PIN(0, 3),
.mosi_pin = GET_PIN(0, 2),
},
#endif
#if defined(BSP_USING_SPI3)
{
.bus_name = "spi3",
.sck_pin = GET_PIN(6, 2),
.miso_pin = GET_PIN(6, 1),
.mosi_pin = GET_PIN(6, 0),
},
#endif
#if defined(BSP_USING_SPI6)
{
.bus_name = "spi6",
.sck_pin = GET_PIN(12, 2),
.miso_pin = GET_PIN(12, 1),
.mosi_pin = GET_PIN(12, 0),
},
#endif
};
static struct ifx_spi spi_config[sizeof(spi_bus_obj) / sizeof(spi_bus_obj[0])] = {0};
/* 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 ifx_spi_ops =
{
.configure = spi_configure,
.xfer = spixfer,
};
static void spi_interrupt_callback(void *arg, cyhal_spi_event_t event)
{
struct ifx_spi *spi_drv = (struct ifx_spi *)arg;
rt_interrupt_enter();
if ((event & CYHAL_SPI_IRQ_DONE) != 0u)
{
/* Transmission is complete. Handle Event */
rt_completion_done(&spi_drv->cpt);
}
rt_interrupt_leave();
}
static void ifx_spi_init(struct ifx_spi *spi_device)
{
RT_ASSERT(spi_device != RT_NULL);
rt_err_t result = RT_EOK;
static uint8_t init_flag = 1;
if (init_flag)
{
result = cyhal_spi_init(spi_device->spi_handle_t->spi_obj, spi_device->spi_handle_t->mosi_pin, spi_device->spi_handle_t->miso_pin,
spi_device->spi_handle_t->sck_pin, NC, NULL, spi_device->spi_handle_t->spi_obj->data_bits,
spi_device->spi_handle_t->spi_obj->mode, false);
if (result != RT_EOK)
{
LOG_E("spi%s init fail", spi_device->spi_handle_t->bus_name);
return;
}
result = cyhal_spi_set_frequency(spi_device->spi_handle_t->spi_obj, spi_device->spi_handle_t->freq);
if (result == CYHAL_SPI_RSLT_CLOCK_ERROR)
{
LOG_E("%s set frequency fail", spi_device->spi_handle_t->bus_name);
return;
}
LOG_I("[%s] freq:[%d]HZ\n", spi_device->spi_handle_t->bus_name, spi_device->spi_handle_t->freq);
/* Register a callback function to be called when the interrupt fires */
cyhal_spi_register_callback(spi_device->spi_handle_t->spi_obj, spi_interrupt_callback, spi_device);
/* Enable the events that will trigger the call back function */
cyhal_spi_enable_event(spi_device->spi_handle_t->spi_obj, CYHAL_SPI_IRQ_DONE, 4, true);
}
init_flag = 0;
}
static rt_err_t spi_configure(struct rt_spi_device *device,
struct rt_spi_configuration *configuration)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(configuration != RT_NULL);
struct ifx_spi *spi_device = rt_container_of(device->bus, struct ifx_spi, spi_bus);
/* data_width */
if (configuration->data_width <= 8)
{
spi_device->spi_handle_t->spi_obj->data_bits = 8;
}
else if (configuration->data_width <= 16)
{
spi_device->spi_handle_t->spi_obj->data_bits = 16;
}
else
{
return -RT_EIO;
}
uint32_t max_hz;
max_hz = configuration->max_hz;
spi_device->spi_handle_t->freq = max_hz;
/* MSB or LSB */
switch (configuration->mode & RT_SPI_MODE_3)
{
case RT_SPI_MODE_0:
spi_device->spi_handle_t->spi_obj->mode = CYHAL_SPI_MODE_00_MSB;
break;
case RT_SPI_MODE_1:
spi_device->spi_handle_t->spi_obj->mode = CYHAL_SPI_MODE_01_MSB;
break;
case RT_SPI_MODE_2:
spi_device->spi_handle_t->spi_obj->mode = CYHAL_SPI_MODE_10_MSB;
break;
case RT_SPI_MODE_3:
spi_device->spi_handle_t->spi_obj->mode = CYHAL_SPI_MODE_11_MSB;
break;
}
ifx_spi_init(spi_device);
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);
struct ifx_spi *spi_device = rt_container_of(device->bus, struct ifx_spi, spi_bus);
/* take CS */
if (message->cs_take && !(device->config.mode & RT_SPI_NO_CS) && (device->cs_pin != PIN_NONE))
{
if (device->config.mode & RT_SPI_CS_HIGH)
{
cyhal_gpio_write(device->cs_pin, PIN_HIGH);
}
else
{
cyhal_gpio_write(device->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_handle_t->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_handle_t->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_handle_t->spi_obj, message->send_buf, message->length, message->recv_buf, message->length, 0x00);
}
/* blocking the thread,and the other tasks can run */
rt_completion_wait(&spi_device->cpt, RT_WAITING_FOREVER);
}
if (message->cs_release && !(device->config.mode & RT_SPI_NO_CS) && (device->cs_pin != PIN_NONE))
{
if (device->config.mode & RT_SPI_CS_HIGH)
cyhal_gpio_write(device->cs_pin, PIN_LOW);
else
cyhal_gpio_write(device->cs_pin, PIN_HIGH);
}
return message->length;
}
/**
* 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;
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_cspin(spi_device, device_name, bus_name, cs_pin, RT_NULL);
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 = RT_EOK;
for (int spi_index = 0; spi_index < sizeof(spi_bus_obj) / sizeof(spi_bus_obj[0]); spi_index++)
{
spi_bus_obj[spi_index].spi_obj = rt_malloc(sizeof(cyhal_spi_t));
RT_ASSERT(spi_bus_obj[spi_index].spi_obj != RT_NULL);
spi_config[spi_index].spi_handle_t = &spi_bus_obj[spi_index];
rt_err_t err = rt_spi_bus_register(&spi_config[spi_index].spi_bus, spi_bus_obj[spi_index].bus_name, &ifx_spi_ops);
if (RT_EOK != err)
{
LOG_E("%s bus register failed.", spi_config[spi_index].spi_handle_t->bus_name);
return -RT_ERROR;
}
LOG_D("MOSI PIN:[%d], MISO PIN[%d], CLK PIN[%d]\n",
spi_bus_obj[spi_index].mosi_pin, spi_bus_obj[spi_index].miso_pin,
spi_bus_obj[spi_index].sck_pin);
/* initialize completion object */
rt_completion_init(&spi_config[spi_index].cpt);
}
return result;
}
INIT_BOARD_EXPORT(rt_hw_spi_init);
#endif /* RT_USING_SPI */
View Git Blame Copy Permalink