From 029e161f594ec46eb96ed878ea31f17037740848 Mon Sep 17 00:00:00 2001
From: sundm75 <sundm75@163.com>
Date: Mon, 24 Dec 2018 18:49:00 +0800
Subject: [BSP][all ls1c]change license to Apache-2.0 [BSP][ls1c] add rtc
 library [BSP][ls1c] add pwm ,touch , rtc driver

---
 bsp/ls1cdev/libraries/ls1c_timer.c | 115 ++++++++++++++++++++++++++++++++++---
 1 file changed, 108 insertions(+), 7 deletions(-)

(limited to 'bsp/ls1cdev/libraries/ls1c_timer.c')

diff --git a/bsp/ls1cdev/libraries/ls1c_timer.c b/bsp/ls1cdev/libraries/ls1c_timer.c
index 0075e6e3f6..11cadf18aa 100644
--- a/bsp/ls1cdev/libraries/ls1c_timer.c
+++ b/bsp/ls1cdev/libraries/ls1c_timer.c
@@ -1,6 +1,15 @@
+ /*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ *                             first version
+ */
 // 硬件定时器源码
 
-
+#include <ls1c.h>  
 #include "ls1c_public.h"
 #include "ls1c_pin.h"
 #include "ls1c_clock.h"
@@ -147,8 +156,6 @@ void timer_stop(timer_info_t *timer_info)
     return ;
 }
 
-
-
 /*
  * 获取定时器从初始化到现在的时间(实现计时功能)，单位ns
  * @timer_info 硬件定时器
@@ -172,13 +179,11 @@ unsigned long timer_get_time_ns(timer_info_t *timer_info)
      */
     timer_clk = clk_get_apb_rate();
     time_ns = (cntr * 1000 ) / (timer_clk /1000000);
-//    rt_kprintf("[%s] time_us=%lu, cntr=%d, timer_clk=%d\n", __FUNCTION__, time_ns, cntr, timer_clk);
+//    printf("[%s] time_us=%lu, cntr=%d, timer_clk=%d\n", __FUNCTION__, time_ns, cntr, timer_clk);
 
     return time_ns;
 }
 
-
-
 /*
  * 打印timer相关寄存器的值
  * @timer_info 硬件定时器
@@ -188,7 +193,7 @@ 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);
-    rt_kprintf("CNTR=0x%x, HRC=0x%x, LRC=0x%x, CTRL=0x%x\n",
+    printf("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)),
@@ -197,4 +202,100 @@ void timer_print_regs(timer_info_t *timer_info)
     return ;
 }
 
+/*
+ * 定时器中断清
+ * @timer_info 定时器信息
+ */
+void timer_int_clr(timer_info_t *timer_info)
+{
+    unsigned int timer_reg_base = 0;        // 寄存器基地址
+    unsigned int ctrl ;  
+    
+    // 判断入参
+    if (NULL == timer_info)
+    {
+        return ;
+    }
+    timer_reg_base = timer_get_reg_base(timer_info->timer);     // 获取寄存器基地址
+    ctrl = reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
+    ctrl = ctrl | (1<<LS1C_PWM_INT_SR) ;
+    reg_write_32(ctrl , (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
+    ctrl = ctrl & (~(1<<LS1C_PWM_INT_SR))  ;
+    reg_write_32(ctrl , (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
 
+    return ;
+}
+/*
+ * 定时器计数清
+ * @timer_info 定时器信息
+ */
+void timer_cnt_clr(timer_info_t *timer_info)
+{
+    unsigned int timer_reg_base = 0;        // 寄存器基地址
+    unsigned int ctrl ;  
+    
+    // 判断入参
+    if (NULL == timer_info)
+    {
+        return ;
+    }
+    timer_reg_base = timer_get_reg_base(timer_info->timer);     // 获取寄存器基地址
+    ctrl = reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
+    ctrl = ctrl | (1<<LS1C_PWM_CNTR_RST);
+    reg_write_32(ctrl , (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
+    ctrl = ctrl & (~(1<<LS1C_PWM_CNTR_RST)) ;
+    reg_write_32(ctrl , (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
+
+    return ;
+}
+
+/*
+ * 初始化定时器，并开始中断定时
+ * @timer_info 定时器和定时时间信息
+ * @hrc 高中断 lrc 低中断 为1打开，为0关闭
+*/
+void timer_int_init(timer_info_t *timer_info, int hrc, int lrc)
+{
+    unsigned int timer_reg_base = 0;        // 寄存器基地址
+    unsigned long timer_clk = 0;            // 硬件定时器的时钟
+    unsigned long h_value, l_value;
+    unsigned int ctrl = 0;                  // 控制寄存器中的控制信息
+    
+    // 判断入参
+    if (NULL == timer_info)
+    {
+        return ;
+    }
+
+    /*
+     * 把定时时间换算为计数器的值
+     * 计数器值 = 定时器的时钟 * 定时时间(单位ns) / 1000000000
+     * 龙芯1c的定时器时钟为APB时钟，达到126Mhz，
+     * 为避免计算过程发生溢出，这里采用手动优化上面的计算式，也可以采用浮点运算
+     */
+    timer_clk = clk_get_apb_rate();
+    l_value = (timer_clk / 1000000) * (timer_info->time_ns / 1000);     // 将1000000000拆分为1000000和1000
+    l_value = MIN(l_value, TIMER_COUNTER_MAX);
+    h_value = (timer_clk / 1000000) * (timer_info->time_h_ns / 1000);     // 将1000000000拆分为1000000和1000
+    h_value = MIN(h_value, l_value);
+
+    // 控制寄存器信息
+    ctrl = (lrc << LS1C_PWM_INT_LRC_EN)
+           | (hrc << LS1C_PWM_INT_HRC_EN)
+           | (0 << LS1C_PWM_CNTR_RST)
+           | (0 << LS1C_PWM_INT_SR)
+           | (1 << LS1C_PWM_INTEN)
+           | (1 << LS1C_PWM_SINGLE)
+           | (1 << LS1C_PWM_OE)
+           | (1 << LS1C_PWM_CNT_EN);
+
+    // 设置各个寄存器
+    timer_reg_base = timer_get_reg_base(timer_info->timer);     // 获取寄存器基地址
+    reg_write_32(0,                     (volatile unsigned int *)(timer_reg_base + LS1C_PWM_HRC));
+    reg_write_32(l_value--,                 (volatile unsigned int *)(timer_reg_base + LS1C_PWM_LRC));
+    reg_write_32(h_value--,                 (volatile unsigned int *)(timer_reg_base + LS1C_PWM_HRC));
+    reg_write_32(0,                     (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CNTR));
+    reg_write_32(ctrl,                  (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
+
+    return ;
+}
-- 
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