增加龙芯1c的硬件SPI相关接口

bsp/ls1cdev/libraries/ls1c_public.c

@@ -137,3 +137,46 @@ int ls1c_ffs(int x)
 }
 
 
+/*
+ * fls - find last (most-significant) bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+int ls1c_fls(int x)
+{
+    int r = 32;
+
+    if (!x)
+        return 0;
+    if (!(x & 0xffff0000u))
+    {
+        x <<= 16;
+        r -= 16;
+    }
+    if (!(x & 0xff000000u))
+    {
+        x <<= 8;
+        r -= 8;
+    }
+    if (!(x & 0xf0000000u))
+    {
+        x <<= 4;
+        r -= 4;
+    }
+    if (!(x & 0xc0000000u))
+    {
+        x <<= 2;
+        r -= 2;
+    }
+    if (!(x & 0x80000000u))
+    {
+        x <<= 1;
+        r -= 1;
+    }
+
+    return r;
+}
+
+

bsp/ls1cdev/libraries/ls1c_public.h

@@ -26,6 +26,8 @@ extern struct callvectors *callvec;
 #define MIN(a, b)           ((a) > (b) ? (b) : (a))
 #define MAX(a, b)           ((a) > (b) ? (a) : (b))
 
+#define DIV_ROUND_UP(n, d)      (((n) + (d) - 1) / (d))
+
 typedef enum
 {
     FALSE=0, 
@@ -95,6 +97,15 @@ unsigned int reg_read_32(volatile unsigned int *addr);
  */
 int ls1c_ffs(int x);
 
+/*
+ * fls - find last (most-significant) bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+int ls1c_fls(int x);
+
 
 #endif
 

bsp/ls1cdev/libraries/ls1c_regs.h

@@ -117,5 +117,16 @@
 #define LS1C_I2C2_BASE                      (0xbfe70000)
 
 
+// SPI寄存器
+#define LS1C_SPI0_BASE                      (0xbfe80000)
+#define LS1C_SPI1_BASE                      (0xbfec0000)
+
+
+// 串口寄存器
+#define LS1C_UART0_BASE                     (0xbfe40000)
+#define LS1C_UART1_BASE                     (0xbfe44000)
+#define LS1C_UART2_BASE                     (0xbfe48000)
+
+
 #endif
 

bsp/ls1cdev/libraries/ls1c_spi.h

@@ -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
+

bsp/ls1cdev/libraries/ls1c_timer.c

@@ -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)),

bsp/ls1cdev/rtconfig.py

@@ -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==========================='