把龙芯1c的SPI接口改为RTT统一的SPI接口
This commit is contained in:
勤为本
Bernard Xiong
parent
d6f80720b6
commit
1bbe09df94
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@ -0,0 +1,229 @@
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/*
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* File : drv_spi.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-11-02 勤为本 first version
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*/
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#include <rtthread.h>
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#include <drivers/spi.h>
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#include "drv_spi.h"
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//#define DEBUG
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#ifdef DEBUG
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#define DEBUG_PRINTF(...) rt_kprintf(__VA_ARGS__)
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#else
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#define DEBUG_PRINTF(...)
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#endif
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static rt_err_t configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
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static rt_uint32_t xfer(struct rt_spi_device *device, struct rt_spi_message *message);
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static struct rt_spi_ops ls1c_spi_ops =
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{
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.configure = configure,
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.xfer = xfer
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};
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static rt_err_t configure(struct rt_spi_device *device,
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struct rt_spi_configuration *configuration)
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{
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struct rt_spi_bus *spi_bus = NULL;
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struct ls1c_spi *ls1c_spi = NULL;
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unsigned char SPIx = 0;
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void *spi_base = NULL;
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unsigned char cpol = 0;
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unsigned char cpha = 0;
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unsigned char val = 0;
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RT_ASSERT(NULL != device);
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RT_ASSERT(NULL != configuration);
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spi_bus = device->bus;
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ls1c_spi = (struct ls1c_spi *)spi_bus->parent.user_data;
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SPIx = ls1c_spi->SPIx;
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spi_base = ls1c_spi_get_base(SPIx);
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{
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// 使能SPI控制器，master模式，关闭中断
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reg_write_8(0x53, spi_base + LS1C_SPI_SPCR_OFFSET);
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// 清空状态寄存器
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reg_write_8(0xc0, spi_base + LS1C_SPI_SPSR_OFFSET);
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// 1字节产生中断，采样(读)与发送(写)时机同时
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reg_write_8(0x03, spi_base + LS1C_SPI_SPER_OFFSET);
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// 关闭SPI flash
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val = reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
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val &= 0xfe;
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reg_write_8(val, spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
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// spi flash时序控制寄存器
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reg_write_8(0x05, spi_base + LS1C_SPI_SFC_TIMING_OFFSET);
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}
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// baudrate
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ls1c_spi_set_clock(spi_base, configuration->max_hz);
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// 设置通信模式(时钟极性和相位)
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if (configuration->mode & RT_SPI_CPOL) // cpol
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{
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cpol = SPI_CPOL_1;
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}
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else
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{
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cpol = SPI_CPOL_0;
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}
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if (configuration->mode & RT_SPI_CPHA) // cpha
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{
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cpha = SPI_CPHA_1;
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}
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else
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{
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cpha = SPI_CPHA_0;
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}
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ls1c_spi_set_mode(spi_base, cpol, cpha);
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DEBUG_PRINTF("ls1c spi%d configuration\n", SPIx);
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return RT_EOK;
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}
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static rt_uint32_t xfer(struct rt_spi_device *device,
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struct rt_spi_message *message)
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{
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struct rt_spi_bus *spi_bus = NULL;
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struct ls1c_spi *ls1c_spi = NULL;
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void *spi_base = NULL;
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unsigned char SPIx = 0;
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struct ls1c_spi_cs *ls1c_spi_cs = NULL;
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unsigned char cs = 0;
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rt_uint32_t size = 0;
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const rt_uint8_t *send_ptr = NULL;
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rt_uint8_t *recv_ptr = NULL;
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rt_uint8_t data = 0;
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RT_ASSERT(NULL != device);
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RT_ASSERT(NULL != message);
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spi_bus = device->bus;
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ls1c_spi = spi_bus->parent.user_data;
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SPIx = ls1c_spi->SPIx;
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spi_base = ls1c_spi_get_base(SPIx);
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ls1c_spi_cs = device->parent.user_data;
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cs = ls1c_spi_cs->cs;
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size = message->length;
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DEBUG_PRINTF("[%s] SPIx=%d, cs=%d\n", __FUNCTION__, SPIx, cs);
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// take cs
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if (message->cs_take)
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{
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ls1c_spi_set_cs(spi_base, cs, 0);
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}
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// 收发数据
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send_ptr = message->send_buf;
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recv_ptr = message->recv_buf;
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while (size--)
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{
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data = 0xFF;
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if (NULL != send_ptr)
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{
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data = *send_ptr++;
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}
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if (NULL != recv_ptr)
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{
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*recv_ptr++ = ls1c_spi_txrx_byte(spi_base, data);
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}
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else
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{
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ls1c_spi_txrx_byte(spi_base, data);
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}
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}
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// release cs
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if (message->cs_release)
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{
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ls1c_spi_set_cs(spi_base, cs, 1);
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}
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return message->length;
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}
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#ifdef RT_USING_SPI0
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struct ls1c_spi ls1c_spi0 =
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{
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.SPIx = LS1C_SPI_0,
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};
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static struct rt_spi_bus spi0_bus;
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#endif
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#ifdef RT_USING_SPI1
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struct ls1c_spi ls1c_spi1 =
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{
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.SPIx = LS1C_SPI_1,
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};
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static struct rt_spi_bus spi1_bus;
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#endif
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/*
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* 初始化并注册龙芯1c的spi总线
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* @SPI SPI总线，比如LS1C_SPI_0， LS1C_SPI_1
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* @spi_bus_name 总线名字
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* @ret
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*/
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rt_err_t ls1c_spi_bus_register(rt_uint8_t SPI, const char *spi_bus_name)
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{
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struct rt_spi_bus *spi_bus = NULL;
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#ifdef RT_USING_SPI0
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if (LS1C_SPI_0 == SPI)
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{
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spi_bus = &spi0_bus;
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spi_bus->parent.user_data = &ls1c_spi0;
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}
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#endif
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#ifdef RT_USING_SPI1
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if (LS1C_SPI_1 == SPI)
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{
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spi_bus = &spi1_bus;
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spi_bus->parent.user_data = &ls1c_spi1;
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}
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#endif
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return rt_spi_bus_register(spi_bus, spi_bus_name, &ls1c_spi_ops);
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}
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@ -0,0 +1,55 @@
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/*
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* File : drv_spi.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-11-02 勤为本 first version
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*/
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#ifndef LS1C_DRV_SPI_H
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#define LS1C_DRV_SPI_H
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#include "../libraries/ls1c_spi.h"
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struct ls1c_spi
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{
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unsigned char SPIx; // LS1C_SPI_0 or LS1C_SPI_1
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};
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struct ls1c_spi_cs
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{
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unsigned char cs; // LS1C_SPI_CS_0, LS1C_SPI_CS_1, LS1C_SPI_CS_2 or LS1C_SPI_CS_3
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};
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/*
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* 初始化并注册龙芯1c的spi总线
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* @SPI SPI总线，比如LS1C_SPI_0， LS1C_SPI_1
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* @spi_bus_name 总线名字
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* @ret
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*/
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rt_err_t ls1c_spi_bus_register(rt_uint8_t SPI, const char *spi_bus_name);
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#endif
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@ -1,40 +0,0 @@
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// led接口
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// 使用低电平点亮led，高电平熄灭led
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#include "ls1c_gpio.h"
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// 初始化led
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// @led_gpio led所在gpio引脚
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void led_init(unsigned int led_gpio)
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{
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gpio_init(led_gpio, gpio_mode_output);
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gpio_set(led_gpio, gpio_level_high); // 指示灯默认熄灭
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return ;
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}
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// 点亮led
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// @led_gpio led所在gpio引脚
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void led_on(unsigned int led_gpio)
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{
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gpio_set(led_gpio, gpio_level_low);
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return ;
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}
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// 熄灭led
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// @led_gpio
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void led_off(unsigned int led_gpio)
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{
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gpio_set(led_gpio, gpio_level_high);
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return ;
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}
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@ -1,27 +0,0 @@
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// led接口
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// 使用低电平点亮led，高电平熄灭led
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#ifndef __OPENLOONGSON_LED_H
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#define __OPENLOONGSON_LED_H
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// 初始化led
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// @led_gpio led所在gpio引脚
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void led_init(unsigned int led_gpio);
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// 点亮led
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// @led_gpio led所在gpio引脚
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void led_on(unsigned int led_gpio);
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// 熄灭led
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// @led_gpio
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void led_off(unsigned int led_gpio);
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#endif
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@ -32,53 +32,13 @@
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#include "ls1c_spi.h"
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// 寄存器偏移
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#define LS1C_SPI_SPCR_OFFSET (0) // 控制寄存器
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#define LS1C_SPI_SPSR_OFFSET (1) // 状态寄存器
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#define LS1C_SPI_TxFIFO_OFFSET (2) // 发送的数据寄存器，与接收数据寄存器的偏移相同
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#define LS1C_SPI_RxFIFO_OFFSET (2) // 接收的数据寄存器，与发送数据寄存器的偏移相同
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#define LS1C_SPI_SPER_OFFSET (3) // 外部寄存器
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#define LS1C_SPI_SFC_PARAM_OFFSET (4) // 参数控制寄存器
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#define LS1C_SPI_SFC_SOFTCS_OFFSET (5) // 片选控制寄存器
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#define LS1C_SPI_SFC_TIMING_OFFSET (6) // 时序控制寄存器
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// 寄存器SPCR中的位域
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#define LS1C_SPI_SPCR_SPIE_BIT (7)
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#define LS1C_SPI_SPCR_SPIE_MASK (0x01 << LS1C_SPI_SPCR_SPIE_BIT)
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#define LS1C_SPI_SPCR_SPE_BIT (6)
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#define LS1C_SPI_SPCR_SPE_MASK (0x01 << LS1C_SPI_SPCR_SPE_BIT)
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#define LS1C_SPI_SPCR_CPOL_BIT (3)
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#define LS1C_SPI_SPCR_CPOL_MASK (0x01 << LS1C_SPI_SPCR_CPOL_BIT)
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#define LS1C_SPI_SPCR_CPHA_BIT (2)
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#define LS1C_SPI_SPCR_CPHA_MASK (0x01 << LS1C_SPI_SPCR_CPHA_BIT)
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#define LS1C_SPI_SPCR_SPR_BIT (0)
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#define LS1C_SPI_SPCR_SPR_MASK (0x03 << LS1C_SPI_SPCR_SPR_BIT)
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// 寄存器SPSR中的位域
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#define LS1C_SPI_SPSR_SPIF_BIT (7)
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#define LS1C_SPI_SPSR_SPIF_MASK (0x01 << LS1C_SPI_SPSR_SPIF_BIT)
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#define LS1C_SPI_SPSR_WCOL_BIT (6)
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#define LS1C_SPI_SPSR_WCOL_MASK (0x01 << LS1C_SPI_SPSR_WCOL_BIT)
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// 寄存器SPER中的位域
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#define LS1C_SPI_SPER_SPRE_BIT (0)
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#define LS1C_SPI_SPER_SPRE_MASK (0x3 << LS1C_SPI_SPER_SPRE_BIT)
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// 寄存器SFC_SOFTCS的位域
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#define LS1C_SPI_SFC_SOFTCS_CSN_BIT (4)
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#define LS1C_SPI_SFC_SOFTCS_CSN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSN_BIT)
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#define LS1C_SPI_SFC_SOFTCS_CSEN_BIT (0)
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#define LS1C_SPI_SFC_SOFTCS_CSEN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSEN_BIT)
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// 发送超时的门限值
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#define LS1C_SPI_TX_TIMEOUT (20000)
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/*
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* 获取指定SPI模块的基地址
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* @SPIx SPI模块的编号
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*/
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inline void *spi_get_base(ls1c_spi_t SPIx)
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inline void *ls1c_spi_get_base(unsigned char SPIx)
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{
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void *base = NULL;
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@ -103,15 +63,12 @@ inline void *spi_get_base(ls1c_spi_t SPIx)
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/*
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* 打印指定SPI模块的所有寄存器的值
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* @spi_info_p SPI模块信息
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* @spi_base 基地址
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*/
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void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p)
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void ls1c_spi_print_all_regs_info(void *spi_base)
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{
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void *spi_base = spi_get_base(spi_info_p->SPIx);
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rt_kprintf("[%s] SPI%d's info:\r\n\
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SPCR=0x%x, SPSR=0x%x, SPER=0x%x, SFC_PARAM=0x%x, SFC_SOFTCS=0x%x, SFC_TIMING=0x%x\r\n",
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__FUNCTION__, spi_info_p->SPIx,
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rt_kprintf("[%s] SPCR=0x%x, SPSR=0x%x, SPER=0x%x, SFC_PARAM=0x%x, SFC_SOFTCS=0x%x, SFC_TIMING=0x%x\r\n",
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__FUNCTION__,
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reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET),
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reg_read_8(spi_base + LS1C_SPI_SPSR_OFFSET),
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reg_read_8(spi_base + LS1C_SPI_SPER_OFFSET),
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@ -128,7 +85,7 @@ void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p)
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* @max_speed_hz SPI最大通信速度
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* @ret 分频系数
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*/
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unsigned int spi_get_div(unsigned int max_speed_hz)
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unsigned int ls1c_spi_get_div(unsigned int max_speed_hz)
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{
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unsigned long clk = 0;
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unsigned int div = 0;
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@ -189,16 +146,16 @@ unsigned int spi_get_div(unsigned int max_speed_hz)
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/*
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* 设置时钟
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* @spi_info_p SPI模块信息
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* @spi_base 基地址
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* @max_hz 最大频率，单位hz
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*/
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void spi_set_clock(ls1c_spi_info_t *spi_info_p)
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void ls1c_spi_set_clock(void *spi_base, unsigned long max_hz)
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{
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void *spi_base = spi_get_base(spi_info_p->SPIx);
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unsigned int div = 0;
|
||||
unsigned char val = 0;
|
||||
|
||||
// 获取分频系数
|
||||
div = spi_get_div(spi_info_p->max_speed_hz);
|
||||
div = ls1c_spi_get_div(max_hz);
|
||||
|
||||
// 设置spr
|
||||
val = reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET);
|
||||
|
|
@ -218,22 +175,23 @@ void spi_set_clock(ls1c_spi_info_t *spi_info_p)
|
|||
|
||||
/*
|
||||
* 设置通信模式(时钟极性和相位)
|
||||
* @spi_info_p SPI模块信息
|
||||
* @spi_base 基地址
|
||||
* @cpol 时钟极性
|
||||
* @cpha 时钟相位
|
||||
*/
|
||||
void spi_set_mode(ls1c_spi_info_t *spi_info_p)
|
||||
void ls1c_spi_set_mode(void *spi_base, unsigned char cpol, unsigned char cpha)
|
||||
{
|
||||
void *spi_base = spi_get_base(spi_info_p->SPIx);
|
||||
unsigned char val = 0;
|
||||
|
||||
val = reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET);
|
||||
|
||||
// 设置时钟极性--cpol
|
||||
val &= (~LS1C_SPI_SPCR_CPOL_MASK); // cpol清0
|
||||
val |= (spi_info_p->cpol << LS1C_SPI_SPCR_CPOL_BIT); // 写入新的cpol
|
||||
val &= (~LS1C_SPI_SPCR_CPOL_MASK); // cpol清0
|
||||
val |= (cpol << LS1C_SPI_SPCR_CPOL_BIT); // 写入新的cpol
|
||||
|
||||
// 设置时钟相位--cpha
|
||||
val &= (~LS1C_SPI_SPCR_CPHA_MASK); // cpha清0
|
||||
val |= (spi_info_p->cpha << LS1C_SPI_SPCR_CPHA_BIT); // 写入新的cpha
|
||||
val &= (~LS1C_SPI_SPCR_CPHA_MASK); // cpha清0
|
||||
val |= (cpha << LS1C_SPI_SPCR_CPHA_BIT); // 写入新的cpha
|
||||
|
||||
reg_write_8(val, spi_base + LS1C_SPI_SPCR_OFFSET);
|
||||
|
||||
|
|
@ -243,13 +201,12 @@ void spi_set_mode(ls1c_spi_info_t *spi_info_p)
|
|||
|
||||
/*
|
||||
* 设置指定片选为指定状态
|
||||
* @spi_info_p SPI模块信息
|
||||
* @spi_base 基地址
|
||||
* @cs 片选
|
||||
* @new_status 片选引脚的新状态，取值为0或1，即高电平或低电平
|
||||
*/
|
||||
void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status)
|
||||
void ls1c_spi_set_cs(void *spi_base, unsigned char cs, int new_status)
|
||||
{
|
||||
void *spi_base = spi_get_base(spi_info_p->SPIx);
|
||||
unsigned char cs = spi_info_p->cs;
|
||||
unsigned char val = 0;
|
||||
|
||||
val = 0xf0 | (0x01 << cs); // 全部csn=1，指定的csen=1
|
||||
|
|
@ -267,51 +224,12 @@ void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status)
|
|||
}
|
||||
|
||||
|
||||
/*
|
||||
* 初始化指定SPI模块
|
||||
* @spi_info_p SPI模块信息
|
||||
*/
|
||||
void spi_init(ls1c_spi_info_t *spi_info_p)
|
||||
{
|
||||
void *spi_base = spi_get_base(spi_info_p->SPIx);
|
||||
unsigned char val = 0;
|
||||
|
||||
// 使能SPI控制器，master模式，关闭中断
|
||||
reg_write_8(0x53, spi_base + LS1C_SPI_SPCR_OFFSET);
|
||||
|
||||
// 清空状态寄存器
|
||||
reg_write_8(0xc0, spi_base + LS1C_SPI_SPSR_OFFSET);
|
||||
|
||||
// 1字节产生中断，采样(读)与发送(写)时机同时
|
||||
reg_write_8(0x03, spi_base + LS1C_SPI_SPER_OFFSET);
|
||||
|
||||
// 关闭SPI flash
|
||||
val = reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
|
||||
val &= 0xfe;
|
||||
reg_write_8(val, spi_base + LS1C_SPI_SFC_PARAM_OFFSET);
|
||||
|
||||
// spi flash时序控制寄存器
|
||||
reg_write_8(0x05, spi_base + LS1C_SPI_SFC_TIMING_OFFSET);
|
||||
|
||||
// 设置时钟
|
||||
spi_set_clock(spi_info_p);
|
||||
|
||||
// 设置通信模式(时钟极性和相位)
|
||||
spi_set_mode(spi_info_p);
|
||||
|
||||
// 打印寄存器信息(用于调试)
|
||||
// spi_print_all_regs_info(spi_info_p);
|
||||
|
||||
return ;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* 等待收发完成
|
||||
* @spi_base 基地址
|
||||
*/
|
||||
inline void spi_wait_txrx_done(ls1c_spi_info_t *spi_info_p)
|
||||
inline void ls1c_spi_wait_txrx_done(void *spi_base)
|
||||
{
|
||||
void *spi_base = spi_get_base(spi_info_p->SPIx);
|
||||
int timeout = LS1C_SPI_TX_TIMEOUT;
|
||||
|
||||
while (timeout--)
|
||||
|
|
@ -326,10 +244,10 @@ inline void spi_wait_txrx_done(ls1c_spi_info_t *spi_info_p)
|
|||
|
||||
/*
|
||||
* 清中断和标志位
|
||||
* @spi_base 基地址
|
||||
*/
|
||||
inline void spi_clear(ls1c_spi_info_t *spi_info_p)
|
||||
inline void ls1c_spi_clear(void *spi_base)
|
||||
{
|
||||
void *spi_base = spi_get_base(spi_info_p->SPIx);
|
||||
unsigned char val = 0;
|
||||
|
||||
// 清中断
|
||||
|
|
@ -356,20 +274,19 @@ inline void spi_clear(ls1c_spi_info_t *spi_info_p)
|
|||
* 注意，在多任务的系统中，此函数需要互斥。
|
||||
* 即保证在和某个从设备收发某个字节的过程中，不能被切换到其它任务同时与另外的在同一个SPI总线上的从设备通信
|
||||
* 因为龙芯1c的每路SPI上可能接有不同的从设备，通信频率、模式等可能不同
|
||||
* @spi_info_p SPI接口
|
||||
* @spi_base 基地址
|
||||
* @tx_ch 待发送的数据
|
||||
* @ret 收到的数据
|
||||
*/
|
||||
unsigned char spi_txrx_byte(ls1c_spi_info_t *spi_info_p, unsigned char tx_ch)
|
||||
unsigned char ls1c_spi_txrx_byte(void *spi_base, unsigned char tx_ch)
|
||||
{
|
||||
void *spi_base = spi_get_base(spi_info_p->SPIx);
|
||||
unsigned char rx_ch = 0;
|
||||
|
||||
// 收发数据
|
||||
reg_write_8(tx_ch, spi_base + LS1C_SPI_TxFIFO_OFFSET); // 开始发送
|
||||
spi_wait_txrx_done(spi_info_p); // 等待收发完成
|
||||
ls1c_spi_wait_txrx_done(spi_base); // 等待收发完成
|
||||
rx_ch = reg_read_8(spi_base + LS1C_SPI_RxFIFO_OFFSET); // 读取收到的数据
|
||||
spi_clear(spi_info_p); // 清中断和标志位
|
||||
ls1c_spi_clear(spi_base); // 清中断和标志位
|
||||
|
||||
return rx_ch;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -29,15 +29,10 @@
|
|||
|
||||
|
||||
// SPI模块编号
|
||||
typedef enum
|
||||
{
|
||||
LS1C_SPI_0 = 0,
|
||||
LS1C_SPI_1,
|
||||
}ls1c_spi_t;
|
||||
|
||||
#define LS1C_SPI_0 (0)
|
||||
#define LS1C_SPI_1 (1)
|
||||
|
||||
// 片选
|
||||
#define LS1C_SPI_INVALID_CS (-1)
|
||||
#define LS1C_SPI_CS_0 (0)
|
||||
#define LS1C_SPI_CS_1 (1)
|
||||
#define LS1C_SPI_CS_2 (2)
|
||||
|
|
@ -50,31 +45,80 @@ typedef enum
|
|||
#define SPI_CPHA_0 (0)
|
||||
|
||||
|
||||
// 硬件SPI信息
|
||||
typedef struct
|
||||
{
|
||||
ls1c_spi_t SPIx; // SPI模块编号
|
||||
unsigned long max_speed_hz; // 最大通信速度，单位hz
|
||||
unsigned char cs; // 片选
|
||||
unsigned char cpol; // 时钟极性
|
||||
unsigned char cpha; // 时钟相位
|
||||
}ls1c_spi_info_t;
|
||||
// 寄存器偏移
|
||||
#define LS1C_SPI_SPCR_OFFSET (0) // 控制寄存器
|
||||
#define LS1C_SPI_SPSR_OFFSET (1) // 状态寄存器
|
||||
#define LS1C_SPI_TxFIFO_OFFSET (2) // 发送的数据寄存器，与接收数据寄存器的偏移相同
|
||||
#define LS1C_SPI_RxFIFO_OFFSET (2) // 接收的数据寄存器，与发送数据寄存器的偏移相同
|
||||
#define LS1C_SPI_SPER_OFFSET (3) // 外部寄存器
|
||||
#define LS1C_SPI_SFC_PARAM_OFFSET (4) // 参数控制寄存器
|
||||
#define LS1C_SPI_SFC_SOFTCS_OFFSET (5) // 片选控制寄存器
|
||||
#define LS1C_SPI_SFC_TIMING_OFFSET (6) // 时序控制寄存器
|
||||
|
||||
// 寄存器SPCR中的位域
|
||||
#define LS1C_SPI_SPCR_SPIE_BIT (7)
|
||||
#define LS1C_SPI_SPCR_SPIE_MASK (0x01 << LS1C_SPI_SPCR_SPIE_BIT)
|
||||
#define LS1C_SPI_SPCR_SPE_BIT (6)
|
||||
#define LS1C_SPI_SPCR_SPE_MASK (0x01 << LS1C_SPI_SPCR_SPE_BIT)
|
||||
#define LS1C_SPI_SPCR_CPOL_BIT (3)
|
||||
#define LS1C_SPI_SPCR_CPOL_MASK (0x01 << LS1C_SPI_SPCR_CPOL_BIT)
|
||||
#define LS1C_SPI_SPCR_CPHA_BIT (2)
|
||||
#define LS1C_SPI_SPCR_CPHA_MASK (0x01 << LS1C_SPI_SPCR_CPHA_BIT)
|
||||
#define LS1C_SPI_SPCR_SPR_BIT (0)
|
||||
#define LS1C_SPI_SPCR_SPR_MASK (0x03 << LS1C_SPI_SPCR_SPR_BIT)
|
||||
|
||||
// 寄存器SPSR中的位域
|
||||
#define LS1C_SPI_SPSR_SPIF_BIT (7)
|
||||
#define LS1C_SPI_SPSR_SPIF_MASK (0x01 << LS1C_SPI_SPSR_SPIF_BIT)
|
||||
#define LS1C_SPI_SPSR_WCOL_BIT (6)
|
||||
#define LS1C_SPI_SPSR_WCOL_MASK (0x01 << LS1C_SPI_SPSR_WCOL_BIT)
|
||||
|
||||
// 寄存器SPER中的位域
|
||||
#define LS1C_SPI_SPER_SPRE_BIT (0)
|
||||
#define LS1C_SPI_SPER_SPRE_MASK (0x3 << LS1C_SPI_SPER_SPRE_BIT)
|
||||
|
||||
// 寄存器SFC_SOFTCS的位域
|
||||
#define LS1C_SPI_SFC_SOFTCS_CSN_BIT (4)
|
||||
#define LS1C_SPI_SFC_SOFTCS_CSN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSN_BIT)
|
||||
#define LS1C_SPI_SFC_SOFTCS_CSEN_BIT (0)
|
||||
#define LS1C_SPI_SFC_SOFTCS_CSEN_MASK (0x0f << LS1C_SPI_SFC_SOFTCS_CSEN_BIT)
|
||||
|
||||
// 发送超时的门限值
|
||||
#define LS1C_SPI_TX_TIMEOUT (20000)
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* 初始化指定SPI模块
|
||||
* @spi_info_p SPI模块信息
|
||||
* 获取指定SPI模块的基地址
|
||||
* @SPIx SPI模块的编号
|
||||
*/
|
||||
void spi_init(ls1c_spi_info_t *spi_info_p);
|
||||
inline void *ls1c_spi_get_base(unsigned char SPIx);
|
||||
|
||||
|
||||
/*
|
||||
* 设置时钟
|
||||
* @spi_base 基地址
|
||||
* @max_hz 最大频率，单位hz
|
||||
*/
|
||||
void ls1c_spi_set_clock(void *spi_base, unsigned long max_hz);
|
||||
|
||||
|
||||
/*
|
||||
* 设置通信模式(时钟极性和相位)
|
||||
* @spi_base 基地址
|
||||
* @cpol 时钟极性
|
||||
* @cpha 时钟相位
|
||||
*/
|
||||
void ls1c_spi_set_mode(void *spi_base, unsigned char cpol, unsigned char cpha);
|
||||
|
||||
|
||||
/*
|
||||
* 设置指定片选为指定状态
|
||||
* @spi_info_p SPI模块信息
|
||||
* @spi_base 基地址
|
||||
* @cs 片选
|
||||
* @new_status 片选引脚的新状态，取值为0或1，即高电平或低电平
|
||||
*/
|
||||
void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status);
|
||||
void ls1c_spi_set_cs(void *spi_base, unsigned char cs, int new_status);
|
||||
|
||||
|
||||
/*
|
||||
|
|
@ -82,18 +126,20 @@ void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status);
|
|||
* 注意，在多任务的系统中，此函数需要互斥。
|
||||
* 即保证在和某个从设备收发某个字节的过程中，不能被切换到其它任务同时与另外的在同一个SPI总线上的从设备通信
|
||||
* 因为龙芯1c的每路SPI上可能接有不同的从设备，通信频率、模式等可能不同
|
||||
* @spi_info_p SPI接口
|
||||
* @spi_base 基地址
|
||||
* @tx_ch 待发送的数据
|
||||
* @ret 收到的数据
|
||||
*/
|
||||
unsigned char spi_txrx_byte(ls1c_spi_info_t *spi_info_p, unsigned char tx_ch);
|
||||
unsigned char ls1c_spi_txrx_byte(void *spi_base, unsigned char tx_ch);
|
||||
|
||||
|
||||
/*
|
||||
* 打印指定SPI模块的所有寄存器的值
|
||||
* @spi_info_p SPI模块信息
|
||||
* @spi_base 基地址
|
||||
*/
|
||||
void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p);
|
||||
void ls1c_spi_print_all_regs_info(void *spi_base);
|
||||
|
||||
|
||||
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -227,6 +227,11 @@
|
|||
#define RTGUI_IMAGE_BMP
|
||||
// </section>
|
||||
|
||||
#define RT_USING_SPI
|
||||
#define RT_USING_SPI0
|
||||
#define RT_USING_SPI1
|
||||
|
||||
|
||||
// </RDTConfigurator>
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue