支持GPIO中断（外部中断）

bsp/ls1cdev/libraries/ls1c_gpio.c

@@ -204,4 +204,63 @@ unsigned int gpio_get(unsigned int gpio)
 }
 
 
+/**
+ * 设置中断类型
+ * @gpio gpio引脚
+ * @type 触发中断的条件。高电平触发、低电平触发、上升沿触发 or 下降沿触发
+ */
+void gpio_set_irq_type(unsigned int gpio, gpio_irq_type_t type)
+{
+    volatile unsigned int *int_pol;     // 中断极性选择寄存器
+    volatile unsigned int *int_edge;    // 中断边沿选择寄存器
+    unsigned int port = GPIO_GET_PORT(gpio);
+    unsigned int pin  = GPIO_GET_PIN(gpio);
+
+    // 获取寄存器地址
+    switch (port)
+    {
+        case 0:     // GPIO[31:0]
+            int_pol     = (volatile unsigned int *)LS1C_INT2_POL;
+            int_edge    = (volatile unsigned int *)LS1C_INT2_EDGE;
+            break;
+
+        case 1:     // GPIO[63:32]
+            int_pol     = (volatile unsigned int *)LS1C_INT3_POL;
+            int_edge    = (volatile unsigned int *)LS1C_INT3_EDGE;
+            break;
+
+        case 2:     // GPIO[95:64]
+            int_pol     = (volatile unsigned int *)LS1C_INT4_POL;
+            int_edge    = (volatile unsigned int *)LS1C_INT4_EDGE;
+            break;
+    }
+
+    // 设置中断类型
+    switch (type)
+    {
+        case IRQ_TYPE_EDGE_RISING:
+            *int_pol    |= (1 << pin);
+            *int_edge   |= (1 << pin);
+            break;
+
+        case IRQ_TYPE_EDGE_FALLING:
+            *int_pol    &= ~(1 << pin);
+            *int_edge   |= (1 << pin);
+            break;
+
+        case IRQ_TYPE_LEVEL_HIGH:
+            *int_pol    |= (1 << pin);
+            *int_edge   &= ~(1 << pin);
+            break;
+
+        case IRQ_TYPE_LEVEL_LOW:
+            *int_pol    &= ~(1 << pin);
+            *int_edge   &= ~(1 << pin);
+            break;
+    }
+
+    return ;
+}
+
+
     

bsp/ls1cdev/libraries/ls1c_gpio.h

@@ -29,6 +29,19 @@ typedef enum{
 }gpio_level_t;
 
 
+typedef enum {
+    // 上升沿触发
+	IRQ_TYPE_EDGE_RISING	= 0x00000001,
+	// 下降沿触发
+	IRQ_TYPE_EDGE_FALLING	= 0x00000002,
+	IRQ_TYPE_EDGE_BOTH	= (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING),
+	// 高电平触发
+	IRQ_TYPE_LEVEL_HIGH	= 0x00000004,
+	// 低电平触发
+	IRQ_TYPE_LEVEL_LOW	= 0x00000008,
+	IRQ_TYPE_LEVEL_MASK	= (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH),	
+}gpio_irq_type_t;
+
 
 
 /*
@@ -73,6 +86,13 @@ unsigned int gpio_get(unsigned int gpio);
 
 
 
+/**
+ * 设置中断类型
+ * @gpio gpio引脚
+ * @type 触发中断的条件。高电平触发、低电平触发、上升沿触发 or 下降沿触发
+ */
+void gpio_set_irq_type(unsigned int gpio, gpio_irq_type_t type);
+
 
 
 #endif

bsp/ls1cdev/libraries/ls1c_regs.h

@@ -74,13 +74,41 @@
 
 
 
-
-
-
-
-
-
-
+// 中断配置寄存器
+#define LS1C_INT0_SR                        (0xbfd01040)
+#define LS1C_INT0_EN                        (0xbfd01044)
+#define LS1C_INT0_SET                       (0xbfd01048)
+#define LS1C_INT0_CLR                       (0xbfd0104c)
+#define LS1C_INT0_POL                       (0xbfd01050)
+#define LS1C_INT0_EDGE                      (0xbfd01054)
+
+#define LS1c_INT1_SR                        (0xbfd01058)
+#define LS1C_INT1_EN                        (0xbfd0105c)
+#define LS1C_INT1_SET                       (0xbfd01060)
+#define LS1C_INT1_CLR                       (0xbfd01064)
+#define LS1C_INT1_POL                       (0xbfd01068)
+#define LS1C_INT1_EDGE                      (0xbfd0106c)
+
+#define LS1C_INT2_SR                        (0xbfd01070)
+#define LS1C_INT2_EN                        (0xbfd01074)
+#define LS1C_INT2_SET                       (0xbfd01078)
+#define LS1C_INT2_CLR                       (0xbfd0107c)
+#define LS1C_INT2_POL                       (0xbfd01080)
+#define LS1C_INT2_EDGE                      (0xbfd01084)
+
+#define LS1C_INT3_SR                        (0xbfd01088)
+#define LS1C_INT3_EN                        (0xbfd0108c)
+#define LS1C_INT3_SET                       (0xbfd01090)
+#define LS1C_INT3_CLR                       (0xbfd01094)
+#define LS1C_INT3_POL                       (0xbfd01098)
+#define LS1C_INT3_EDGE                      (0xbfd0109c)
+
+#define LS1C_INT4_SR                        (0xbfd010a0)
+#define LS1C_INT4_EN                        (0xbfd010a4)
+#define LS1C_INT4_SET                       (0xbfd010a8)
+#define LS1C_INT4_CLR                       (0xbfd010ac)
+#define LS1C_INT4_POL                       (0xbfd010b0)
+#define LS1C_INT4_EDGE                      (0xbfd010b4)
 
 
 

libcpu/mips/loongson_1c/ls1c.h

@@ -77,6 +77,11 @@
 #define LS1C_NR_IRQS    (32*5)
 
 
+// GPIO编号和中断号之间的互相转换
+#define LS1C_GPIO_TO_IRQ(GPIOn)     (LS1C_GPIO_FIRST_IRQ + (GPIOn))
+#define LS1C_IRQ_TO_GPIO(IRQn)      ((IRQn) - LS1C_GPIO_FIRST_IRQ)
+
+
 struct ls1c_intc_regs
 {
 	volatile unsigned int int_isr;