增加龙芯1c的硬件SPI相关接口
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勤为本
parent
b2fbe4df01
commit
51d02f98d6
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@ -137,3 +137,46 @@ int ls1c_ffs(int x)
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}
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/*
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* fls - find last (most-significant) bit set
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* @x: the word to search
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*
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* This is defined the same way as ffs.
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* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
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*/
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int ls1c_fls(int x)
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{
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int r = 32;
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if (!x)
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return 0;
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if (!(x & 0xffff0000u))
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{
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x <<= 16;
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r -= 16;
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}
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if (!(x & 0xff000000u))
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{
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x <<= 8;
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r -= 8;
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}
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if (!(x & 0xf0000000u))
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{
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x <<= 4;
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r -= 4;
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}
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if (!(x & 0xc0000000u))
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{
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x <<= 2;
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r -= 2;
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}
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if (!(x & 0x80000000u))
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{
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x <<= 1;
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r -= 1;
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}
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return r;
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}
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@ -26,6 +26,8 @@ extern struct callvectors *callvec;
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#define MIN(a, b) ((a) > (b) ? (b) : (a))
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
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typedef enum
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{
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FALSE=0,
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@ -95,6 +97,15 @@ unsigned int reg_read_32(volatile unsigned int *addr);
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*/
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int ls1c_ffs(int x);
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/*
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* fls - find last (most-significant) bit set
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* @x: the word to search
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*
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* This is defined the same way as ffs.
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* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
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*/
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int ls1c_fls(int x);
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#endif
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@ -117,5 +117,16 @@
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#define LS1C_I2C2_BASE (0xbfe70000)
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// SPI寄存器
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#define LS1C_SPI0_BASE (0xbfe80000)
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#define LS1C_SPI1_BASE (0xbfec0000)
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// 串口寄存器
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#define LS1C_UART0_BASE (0xbfe40000)
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#define LS1C_UART1_BASE (0xbfe44000)
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#define LS1C_UART2_BASE (0xbfe48000)
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#endif
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@ -0,0 +1,378 @@
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/*
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* File : ls1c_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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* 2017-10-23 勤为本 first version
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*/
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// 硬件spi接口源文件
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#include <string.h>
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#include "ls1c_public.h"
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#include "ls1c_regs.h"
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#include "ls1c_clock.h"
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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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{
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void *base = NULL;
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switch (SPIx)
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{
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case LS1C_SPI_0:
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base = (void *)LS1C_SPI0_BASE;
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break;
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case LS1C_SPI_1:
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base = (void *)LS1C_SPI1_BASE;
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break;
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default:
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base = NULL;
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break;
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}
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return base;
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}
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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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*/
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void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p)
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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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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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reg_read_8(spi_base + LS1C_SPI_SFC_PARAM_OFFSET),
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reg_read_8(spi_base + LS1C_SPI_SFC_SOFTCS_OFFSET),
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reg_read_8(spi_base + LS1C_SPI_SFC_TIMING_OFFSET));
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return ;
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}
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/*
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* 根据SPI时钟频率计算分频系数
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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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{
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unsigned long clk = 0;
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unsigned int div = 0;
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unsigned int div_tmp = 0;
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unsigned int bit = 0;
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clk = clk_get_apb_rate();
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div = DIV_ROUND_UP(clk, max_speed_hz);
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if (div < 2)
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div = 2;
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if (div > 4096)
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div = 4096;
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bit = ls1c_fls(div) - 1;
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switch (1 << bit)
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{
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case 16:
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div_tmp = 2;
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if (div > (1 << bit))
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{
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div_tmp++;
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}
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break;
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case 32:
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div_tmp = 3;
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if (div > (1 << bit))
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{
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div_tmp += 2;
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}
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break;
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case 8:
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div_tmp = 4;
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if (div > (1 << bit))
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{
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div_tmp -= 2;
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}
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break;
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default:
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div_tmp = bit - 1;
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if (div > (1 << bit))
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{
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div_tmp++;
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}
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break;
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}
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/*
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rt_kprintf("[%s] clk=%ld, max_speed_hz=%d, div_tmp=%d, bit=%d\r\n",
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__FUNCTION__, clk, max_speed_hz, div_tmp, bit);
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*/
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return div_tmp;
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}
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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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*/
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void spi_set_clock(ls1c_spi_info_t *spi_info_p)
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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;
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unsigned char val = 0;
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// 获取分频系数
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div = spi_get_div(spi_info_p->max_speed_hz);
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// 设置spr
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val = reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET);
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val &= (~LS1C_SPI_SPCR_SPR_MASK); // spr清零
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val |= (div & LS1C_SPI_SPCR_SPR_MASK); // 设置新的spr
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reg_write_8(val, spi_base + LS1C_SPI_SPCR_OFFSET);
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// 设置spre
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val = reg_read_8(spi_base + LS1C_SPI_SPER_OFFSET);
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val &= (~LS1C_SPI_SPER_SPRE_MASK); // spre清零
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val |= ((div >> 2) & LS1C_SPI_SPER_SPRE_MASK); // 设置新的spre
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reg_write_8(val, spi_base + LS1C_SPI_SPER_OFFSET);
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return ;
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}
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/*
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* 设置通信模式(时钟极性和相位)
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* @spi_info_p SPI模块信息
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*/
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void spi_set_mode(ls1c_spi_info_t *spi_info_p)
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{
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void *spi_base = spi_get_base(spi_info_p->SPIx);
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unsigned char val = 0;
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val = reg_read_8(spi_base + LS1C_SPI_SPCR_OFFSET);
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// 设置时钟极性--cpol
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val &= (~LS1C_SPI_SPCR_CPOL_MASK); // cpol清0
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val |= (spi_info_p->cpol << LS1C_SPI_SPCR_CPOL_BIT); // 写入新的cpol
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// 设置时钟相位--cpha
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val &= (~LS1C_SPI_SPCR_CPHA_MASK); // cpha清0
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val |= (spi_info_p->cpha << LS1C_SPI_SPCR_CPHA_BIT); // 写入新的cpha
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reg_write_8(val, spi_base + LS1C_SPI_SPCR_OFFSET);
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return ;
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}
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/*
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* 设置指定片选为指定状态
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* @spi_info_p SPI模块信息
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* @new_status 片选引脚的新状态，取值为0或1，即高电平或低电平
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*/
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void spi_set_cs(ls1c_spi_info_t *spi_info_p, int new_status)
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{
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void *spi_base = spi_get_base(spi_info_p->SPIx);
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unsigned char cs = spi_info_p->cs;
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unsigned char val = 0;
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val = 0xf0 | (0x01 << cs); // 全部csn=1，指定的csen=1
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if (new_status) // cs = 1
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{
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val |= (0x10 << cs); // 指定csn=1
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}
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else // cs = 0
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{
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val &= ~(0x10 << cs); // 指定csn=0
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}
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reg_write_8(val, spi_base + LS1C_SPI_SFC_SOFTCS_OFFSET);
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return ;
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}
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/*
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* 初始化指定SPI模块
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* @spi_info_p SPI模块信息
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*/
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void spi_init(ls1c_spi_info_t *spi_info_p)
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{
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void *spi_base = spi_get_base(spi_info_p->SPIx);
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unsigned char val = 0;
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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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// 设置时钟
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spi_set_clock(spi_info_p);
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// 设置通信模式(时钟极性和相位)
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spi_set_mode(spi_info_p);
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// 打印寄存器信息(用于调试)
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// spi_print_all_regs_info(spi_info_p);
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return ;
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}
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/*
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* 等待收发完成
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*/
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inline void spi_wait_txrx_done(ls1c_spi_info_t *spi_info_p)
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{
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void *spi_base = spi_get_base(spi_info_p->SPIx);
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int timeout = LS1C_SPI_TX_TIMEOUT;
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while (timeout--)
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{
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if (LS1C_SPI_SPSR_SPIF_MASK & reg_read_8(spi_base + LS1C_SPI_SPSR_OFFSET))
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break;
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}
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return ;
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}
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/*
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* 清中断和标志位
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*/
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inline void spi_clear(ls1c_spi_info_t *spi_info_p)
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{
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void *spi_base = spi_get_base(spi_info_p->SPIx);
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unsigned char val = 0;
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// 清中断
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val = reg_read_8(spi_base + LS1C_SPI_SPSR_OFFSET);
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val |= LS1C_SPI_SPSR_SPIF_MASK;
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reg_write_8(val, spi_base + LS1C_SPI_SPSR_OFFSET);
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// 清溢出标志位(Write-Collision Clear)
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val = reg_read_8(spi_base + LS1C_SPI_SPSR_OFFSET);
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if (LS1C_SPI_SPSR_WCOL_MASK & val)
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{
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rt_kprintf("[%s] clear register SPSR's wcol!\r\n"); // 手册和linux源码中不一样，加个打印看看
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reg_write_8(val & ~LS1C_SPI_SPSR_WCOL_MASK, spi_base + LS1C_SPI_SPSR_OFFSET); // 写0，linux源码中是写0
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// reg_write_8(val | LS1C_SPI_SPSR_WCOL_MASK, spi_base + LS1C_SPI_SPSR_OFFSET); // 写1，按照1c手册，应该写1
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}
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||||
return ;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* 通过指定SPI发送接收一个字节
|
||||
* 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
|
||||
* @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)
|
||||
{
|
||||
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
|
||||
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
|
||||
|
||||
return rx_ch;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,100 @@
|
|||
/*
|
||||
* File : ls1c_spi.h
|
||||
* This file is part of RT-Thread RTOS
|
||||
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License along
|
||||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*
|
||||
* Change Logs:
|
||||
* Date Author Notes
|
||||
* 2017-10-23 勤为本 first version
|
||||
*/
|
||||
|
||||
// 硬件spi接口的头文件
|
||||
|
||||
#ifndef __OPENLOONGSON_SPI_H
|
||||
#define __OPENLOONGSON_SPI_H
|
||||
|
||||
|
||||
// SPI模块编号
|
||||
typedef enum
|
||||
{
|
||||
LS1C_SPI_0 = 0,
|
||||
LS1C_SPI_1,
|
||||
}ls1c_spi_t;
|
||||
|
||||
|
||||
// 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)
|
||||
#define LS1C_SPI_CS_3 (3)
|
||||
|
||||
// 时钟极性和相位
|
||||
#define SPI_CPOL_1 (1)
|
||||
#define SPI_CPOL_0 (0)
|
||||
#define SPI_CPHA_1 (1)
|
||||
#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;
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* 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);
|
||||
|
||||
|
||||
/*
|
||||
* 设置指定片选为指定状态
|
||||
* @spi_info_p SPI模块信息
|
||||
* @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);
|
||||
|
||||
|
||||
/*
|
||||
* 通过指定SPI发送接收一个字节
|
||||
* 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
|
||||
* @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);
|
||||
|
||||
|
||||
/*
|
||||
* 打印指定SPI模块的所有寄存器的值
|
||||
* @spi_info_p SPI模块信息
|
||||
*/
|
||||
void spi_print_all_regs_info(ls1c_spi_info_t *spi_info_p);
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
|
|
@ -172,7 +172,7 @@ unsigned long timer_get_time_ns(timer_info_t *timer_info)
|
|||
*/
|
||||
timer_clk = clk_get_apb_rate();
|
||||
time_ns = (cntr * 1000 ) / (timer_clk /1000000);
|
||||
// myprintf("[%s] time_us=%lu, cntr=%d, timer_clk=%d\n", __FUNCTION__, time_ns, cntr, timer_clk);
|
||||
// rt_kprintf("[%s] time_us=%lu, cntr=%d, timer_clk=%d\n", __FUNCTION__, time_ns, cntr, timer_clk);
|
||||
|
||||
return time_ns;
|
||||
}
|
||||
|
|
@ -188,7 +188,7 @@ void timer_print_regs(timer_info_t *timer_info)
|
|||
unsigned int timer_reg_base = 0;
|
||||
|
||||
timer_reg_base = timer_get_reg_base(timer_info->timer);
|
||||
myprintf("CNTR=0x%x, HRC=0x%x, LRC=0x%x, CTRL=0x%x\n",
|
||||
rt_kprintf("CNTR=0x%x, HRC=0x%x, LRC=0x%x, CTRL=0x%x\n",
|
||||
reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CNTR)),
|
||||
reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_HRC)),
|
||||
reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_LRC)),
|
||||
|
|
|
|||
|
|
@ -12,6 +12,7 @@ if os.getenv('RTT_CC'):
|
|||
|
||||
if CROSS_TOOL == 'gcc':
|
||||
PLATFORM = 'gcc'
|
||||
# EXEC_PATH = "/opt/mips-2015.05/bin"
|
||||
EXEC_PATH = r'D:\mgc\embedded\codebench\bin'
|
||||
else:
|
||||
print '================ERROR==========================='
|
||||
|
|
|
|||
Loading…
Reference in New Issue