将“龙芯1c库”中硬件定时器相关接口移植到RT-Thread

2 files changed, 269 insertions, 0 deletions

diff --git a/bsp/ls1cdev/libraries/ls1c_timer.c b/bsp/ls1cdev/libraries/ls1c_timer.c
new file mode 100644
index 0000000000..8c3b164121
--- /dev/null
+++ b/bsp/ls1cdev/libraries/ls1c_timer.c
@@ -0,0 +1,200 @@
+// Ӳ����ʱ��Դ��
+
+
+#include "ls1c_public.h"
+#include "ls1c_pin.h"
+#include "ls1c_clock.h"
+#include "ls1c_regs.h"
+#include "ls1c_pwm.h"
+#include "ls1c_timer.h"
+
+
+// ��ʱ���м�����(CNTR��HRC��LRC)�����ֵ
+#define TIMER_COUNTER_MAX               (0xffffff)
+
+
+
+/*
+ * ��ȡָ����ʱ���ļĴ�������ַ
+ * @timer Ӳ����ʱ��
+ * @ret ����ַ
+ */
+unsigned int timer_get_reg_base(ls1c_timer_t timer)
+{
+    unsigned int reg_base = 0;
+
+    switch (timer)
+    {
+        case TIMER_PWM0:
+            reg_base = LS1C_REG_BASE_PWM0;
+            break;
+
+        case TIMER_PWM1:
+            reg_base = LS1C_REG_BASE_PWM1;
+            break;
+
+        case TIMER_PWM2:
+            reg_base = LS1C_REG_BASE_PWM2;
+            break;
+
+        case TIMER_PWM3:
+            reg_base = LS1C_REG_BASE_PWM3;
+            break;
+    }
+
+    return reg_base;
+}
+
+
+/*
+ * ��ʼ����ʱ��������ʼ��ʱ
+ * @timer_info ��ʱ���Ͷ�ʱʱ����Ϣ
+ */
+void timer_init(timer_info_t *timer_info)
+{
+    unsigned int timer_reg_base = 0;        // �Ĵ�������ַ
+    unsigned long timer_clk = 0;            // Ӳ����ʱ����ʱ��
+    unsigned long tmp;
+    unsigned int ctrl = 0;                  // ���ƼĴ����еĿ�����Ϣ
+    
+    // ����
+    if (NULL == timer_info)
+    {
+        return ;
+    }
+
+    /*
+     * �Ѷ�ʱʱ�任��Ϊ��������ֵ
+     * ������ֵ = ��ʱ����ʱ�� * ��ʱʱ��(��λns) / 1000000000
+     * ��о1c�Ķ�ʱ��ʱ��ΪAPBʱ�ӣ��ﵽ126Mhz��
+     * Ϊ���������̷����������������ֶ��Ż�����ļ���ʽ��Ҳ���Բ��ø�������
+     */
+    timer_clk = clk_get_apb_rate();
+    tmp = (timer_clk / 1000000) * (timer_info->time_ns / 1000);     // ��1000000000���Ϊ1000000��1000
+    tmp = MIN(tmp, TIMER_COUNTER_MAX);
+
+    // ���ƼĴ�����Ϣ
+    ctrl = (1 << LS1C_PWM_INT_LRC_EN)
+           | (0 << 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);
+
+    // ���ø����Ĵ���
+    timer_reg_base = timer_get_reg_base(timer_info->timer);     // ��ȡ�Ĵ�������ַ
+    reg_write_32(0,                     (volatile unsigned int *)(timer_reg_base + LS1C_PWM_HRC));
+    reg_write_32(tmp--,                 (volatile unsigned int *)(timer_reg_base + LS1C_PWM_LRC));
+    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 ;
+}
+
+
+/*
+ * �ж�ָ����ʱ���Ƿ�ʱ(ʵ�ֶ�ʱ)
+ * @timer_info ��ʱ��
+ * @ret TRUE or FALSE
+ */
+BOOL timer_is_time_out(timer_info_t *timer_info)
+{
+    unsigned int timer_reg_base = 0;        // �Ĵ�������ַ
+    unsigned int ctrl;                      // ���ƼĴ�����ֵ
+    
+    // ����
+    if (NULL == timer_info)
+    {
+        return FALSE;
+    }
+
+    // ��ȡ���ƼĴ���
+    timer_reg_base = timer_get_reg_base(timer_info->timer);
+    ctrl = reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
+
+    // �ж��ж�״̬λ
+    if (ctrl & (1 << LS1C_PWM_INT_SR))
+    {
+        return TRUE;
+    }
+    else
+    {
+        return FALSE;
+    }
+}
+
+
+
+/*
+ * ֹͣ��ʱ��
+ * @timer_info ��ʱ��
+ */
+void timer_stop(timer_info_t *timer_info)
+{
+    unsigned int timer_reg_base = 0;
+    
+    // ����
+    if (NULL == timer_info)
+    {
+        return ;
+    }
+
+    timer_reg_base = timer_get_reg_base(timer_info->timer);
+    reg_write_32(0, (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
+
+    return ;
+}
+
+
+
+/*
+ * ��ȡ��ʱ���ӳ�ʼ�������ڵ�ʱ��(ʵ�ּ�ʱ����)����λns
+ * @timer_info Ӳ����ʱ��
+ * @ret ʱ�䣬��λns
+ */
+unsigned long timer_get_time_ns(timer_info_t *timer_info)
+{
+    unsigned int timer_reg_base = 0;
+    unsigned int cntr = 0;                  // �Ĵ���CNTR��ֵ
+    unsigned long time_ns = 0;              // ʱ�䣬��λns
+    unsigned long timer_clk = 0;            // ��ʱ��ʱ��
+
+    // ��ȡ�Ĵ���CNTR��ֵ
+    timer_reg_base = timer_get_reg_base(timer_info->timer);
+    cntr = reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CNTR));
+
+    /*
+     * ��CNTRֵ����Ϊʱ�䣬��λus
+     * ʱ�� = (������ֵCNTR * 1000000000) / ��ʱ��ʱ��Ƶ��
+     * Ϊ�������������ֶ��Ż���ʽΪ ʱ�� = (������ֵCNTR * 1000) / (��ʱ��ʱ��Ƶ�� / 1000000)
+     */
+    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);
+
+    return time_ns;
+}
+
+
+
+/*
+ * ��ӡtimer��ؼĴ�����ֵ
+ * @timer_info Ӳ����ʱ��
+ */
+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",
+              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)),
+              reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL)));
+
+    return ;
+}
+
+
diff --git a/bsp/ls1cdev/libraries/ls1c_timer.h b/bsp/ls1cdev/libraries/ls1c_timer.h
new file mode 100644
index 0000000000..df38c705f5
--- /dev/null
+++ b/bsp/ls1cdev/libraries/ls1c_timer.h
@@ -0,0 +1,69 @@
+// Ӳ����ʱ��ͷ�ļ�
+
+
+#ifndef __OPENLOONGSON_TIMER_H
+#define __OPENLOONGSON_TIMER_H
+
+
+#include "ls1c_public.h"
+
+
+// Ӳ����ʱ��
+typedef enum
+{
+    TIMER_PWM0,                     // PWM0����Ӳ����ʱ��
+    TIMER_PWM1,                     // PWM1����Ӳ����ʱ��
+    TIMER_PWM2,                     // PWM2����Ӳ����ʱ��
+    TIMER_PWM3                      // PWM3����Ӳ����ʱ��
+}ls1c_timer_t;
+
+
+// Ӳ����ʱ����Ϣ
+typedef struct
+{
+    ls1c_timer_t timer;                  // Ӳ����ʱ��
+    unsigned long time_ns;          // ��ʱʱ��
+}timer_info_t;
+
+
+
+/*
+ * ��ʼ����ʱ��������ʼ��ʱ
+ * @timer_info ��ʱ���Ͷ�ʱʱ����Ϣ
+ */
+void timer_init(timer_info_t *timer_info);
+
+
+/*
+ * �ж�ָ����ʱ���Ƿ�ʱ
+ * @timer_info ��ʱ��
+ * @ret TRUE or FALSE
+ */
+BOOL timer_is_time_out(timer_info_t *timer_info);
+
+
+/*
+ * ֹͣ��ʱ��
+ * @timer_info ��ʱ��
+ */
+void timer_stop(timer_info_t *timer_info);
+
+
+
+/*
+ * ��ȡ��ʱ���ӳ�ʼ�������ڵ�ʱ��(ʵ�ּ�ʱ����)����λns
+ * @timer_info Ӳ����ʱ��
+ * @ret ʱ�䣬��λns
+ */
+unsigned long timer_get_time_ns(timer_info_t *timer_info);
+
+
+/*
+ * ��ӡtimer��ؼĴ�����ֵ
+ * @timer_info Ӳ����ʱ��
+ */
+void timer_print_regs(timer_info_t *timer_info);
+
+
+#endif
+