diff --git a/.gitignore b/.gitignore
index 39e7ef2..9cd323e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 libwiringPiDev.so.2.0
 libwiringPi.so.2.0
 /test/
+nbproject
\ No newline at end of file
diff --git a/README.md b/README.md
index 0360683..a1b911e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # WiringNP
 This is a GPIO access library for NanoPI. It is based on the WiringOP for Orange PI which is based on original WiringPi for Raspberry Pi.
+
+Currently only NanoPi M1 board supported
\ No newline at end of file
diff --git a/gpio/gpio.c b/gpio/gpio.c
index 55b7630..14c5926 100644
--- a/gpio/gpio.c
+++ b/gpio/gpio.c
@@ -839,46 +839,8 @@ static void doPadDrive (int argc, char *argv [])
 
 static void doUsbP (int argc, char *argv [])
 {
-  int model, rev, mem, maker, overVolted ;
-
-  if (argc != 3)
-  {
-    fprintf (stderr, "Usage: %s usbp high|low\n", argv [0]) ;
-    exit (1) ;
-  }
-
-// Make sure we're on a B+
-
-  piBoardId (&model, &rev, &mem, &maker, &overVolted) ;
-
-  if (model != PI_MODEL_BP)
-  {
-    fprintf (stderr, "USB power contol is applicable to B+ boards only.\n") ;
-    exit (1) ;
-  }
-    
-// Need to force BCM_GPIO mode:
-
-  wiringPiSetupGpio () ;
-
-  if ((strcasecmp (argv [2], "high") == 0) || (strcasecmp (argv [2], "hi") == 0))
-  {
-    digitalWrite (PI_USB_POWER_CONTROL, 1) ;
-    pinMode (PI_USB_POWER_CONTROL, OUTPUT) ;
-    printf ("Switched to HIGH current USB (1.2A)\n") ;
-    return ;
-  }
-
-  if ((strcasecmp (argv [2], "low") == 0) || (strcasecmp (argv [2], "lo") == 0))
-  {
-    digitalWrite (PI_USB_POWER_CONTROL, 0) ;
-    pinMode (PI_USB_POWER_CONTROL, OUTPUT) ;
-    printf ("Switched to LOW current USB (600mA)\n") ;
-    return ;
-  }
-
-  fprintf (stderr, "Usage: %s usbp high|low\n", argv [0]) ;
-  exit (1) ;
+    fprintf (stderr, "USB power is not supported\n", argv [0]) ;
+    return;
 }
 
 
diff --git a/wiringPi/wiringPi.c b/wiringPi/wiringPi.c
index 4591df0..9357a86 100644
--- a/wiringPi/wiringPi.c
+++ b/wiringPi/wiringPi.c
@@ -204,7 +204,8 @@ static volatile uint32_t *timerIrqRaw;
 #define MAP_SIZE (4096*2)
 #define MAP_MASK (MAP_SIZE - 1)
 //sunxi_pwm
-#define SUNXI_PWM_BASE (0x01c20e00)
+//#define SUNXI_PWM_BASE (0x01c20e00)
+#define SUNXI_PWM_BASE (0x01c21400)
 #define SUNXI_PWM_CTRL_REG  (SUNXI_PWM_BASE)
 #define SUNXI_PWM_CH0_PERIOD  (SUNXI_PWM_BASE + 0x4)
 #define SUNXI_PWM_CH1_PERIOD  (SUNXI_PWM_BASE + 0x8)
@@ -239,7 +240,7 @@ static volatile uint32_t *timerIrqRaw;
 //	#define GPIO_BASE_BP		(SUNXI_GPIO_BASE)
 #define GPIO_BASE_BP  (0x01C20000)
 #define GPIO_TIMER_BP  (0x0000B000)
-#define GPIO_PWM_BP  (0x01c20000)  //need 4k*n
+#define GPIO_PWM_BP  (0x01C21000)  //need 4k*n
 
 static int wiringPinMode = WPI_MODE_UNINITIALISED;
 int wiringPiCodes = FALSE;
@@ -679,7 +680,7 @@ static int pwmmode = 0;
  *********************************************************************************
  */
 
-/*add for BananaPro by LeMaker team*/
+
 uint32_t readl(uint32_t addr) {
     uint32_t val = 0;
     uint32_t mmap_base = (addr & ~MAP_MASK);
@@ -731,9 +732,12 @@ void sunxi_pwm_set_mode(int mode) {
 
 void sunxi_pwm_set_clk(int clk) {
     int val = 0;
-
+    if (wiringPiDebug)
+        printf(">>function%s,no:%d\n", __func__, __LINE__);
     // sunxi_pwm_set_enable(0);
     val = readl(SUNXI_PWM_CTRL_REG);
+    if (wiringPiDebug)
+        printf("read reg val: 0x%x\n", val);
     //clear clk to 0
     val &= 0xf801f0;
     val |= ((clk & 0xf) << 15); //todo check wether clk is invalid or not
@@ -750,6 +754,7 @@ void sunxi_pwm_set_clk(int clk) {
 uint32_t sunxi_pwm_get_period(void) {
     uint32_t period_cys = 0;
     period_cys = readl(SUNXI_PWM_CH1_PERIOD); //get ch1 period_cys
+    printf("periodcys: %d\n", period_cys);
     period_cys &= 0xffff0000; //get period_cys
     period_cys = period_cys >> 16;
     if (wiringPiDebug)
@@ -776,10 +781,17 @@ void sunxi_pwm_set_period(int period_cys) {
     period_cys &= 0xffff; //set max period to 2^16
     period_cys = period_cys << 16;
     val = readl(SUNXI_PWM_CH1_PERIOD);
+    if (wiringPiDebug)
+        printf("read reg val: 0x%x\n", val);
     val &= 0x0000ffff;
     period_cys |= val;
+    if (wiringPiDebug)
+        printf("write reg val: 0x%x\n", period_cys);
     writel(period_cys, SUNXI_PWM_CH1_PERIOD);
     delay(1);
+    val = readl(SUNXI_PWM_CH1_PERIOD);
+    if (wiringPiDebug)
+        printf("readback reg val: 0x%x\n", val);
 
 }
 
@@ -789,9 +801,13 @@ void sunxi_pwm_set_act(int act_cys) {
     if (wiringPiDebug)
         printf(">>func:%s no:%d\n", __func__, __LINE__);
     per0 = readl(SUNXI_PWM_CH1_PERIOD);
+    if (wiringPiDebug)
+        printf("read reg val: 0x%x\n", per0);
     per0 &= 0xffff0000;
     act_cys &= 0xffff;
     act_cys |= per0;
+    if (wiringPiDebug)
+        printf("write reg val: 0x%x\n", act_cys);
     writel(act_cys, SUNXI_PWM_CH1_PERIOD);
     delay(1);
 }
@@ -851,7 +867,7 @@ void sunxi_set_gpio_mode(int pin, int mode) {
         else if (PWM_OUTPUT == mode) {
             // set pin PWMx to pwm mode
             regval &= ~(7 << offset);
-            regval |= (0x2 << offset);
+            regval |= (0x3 << offset);
             if (wiringPiDebug)
                 printf(">>>>>line:%d PWM mode ready to set val: 0x%x\n", __LINE__, regval);
             writel(regval, phyaddr);
@@ -1441,9 +1457,9 @@ void pinMode(int pin, int mode) {
             wiringPinMode = OUTPUT;
             return;
         } else if (mode == PWM_OUTPUT) {
-            if (pin != 259) {
+            if (pin != 6) {
                 printf("the pin you choose doesn't support hardware PWM\n");
-                printf("you can select PI3 for PWM pin\n");
+                printf("you can select wiringPi pin %d for PWM pin\n", 1);
                 printf("or you can use it in softPwm mode\n");
                 return;
             }
@@ -1649,7 +1665,7 @@ void pwmWrite(int pin, int value) {
             printf("[%s:L%d] the pin:%d is invaild,please check it over!\n", __func__, __LINE__, pin);
             return;
         }
-        if (pin != 259) {
+        if (pin != 6) {
             printf("please use soft pwmmode or choose PWM pin\n");
             return;
         }
@@ -2029,7 +2045,8 @@ int wiringPiSetup(void) {
 
 
     // GPIO:
-    gpio = (uint32_t *) mmap(0, BLOCK_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, GPIO_BASE_BP);
+    // BLOCK SIZE * 2 increases range to include pwm addresses
+    gpio = (uint32_t *) mmap(0, BLOCK_SIZE*10, PROT_READ | PROT_WRITE, MAP_SHARED, fd, GPIO_BASE_BP);
     if ((int32_t) gpio == -1)
         return wiringPiFailure(WPI_ALMOST, "wiringPiSetup: mmap (GPIO) failed: %s\n", strerror(errno));
 
diff --git a/wiringPi/wiringPi.h b/wiringPi/wiringPi.h
index 5eda29b..1f3045f 100644
--- a/wiringPi/wiringPi.h
+++ b/wiringPi/wiringPi.h
@@ -71,7 +71,8 @@
 // Pi model types and version numbers
 //	Intended for the GPIO program Use at your own risk.
 
-#define	PI_MODEL_M1	0
+#define PI_MODEL_UNKNOWN 0
+#define	PI_MODEL_M1	1
 
 #define	PI_VERSION_UNKNOWN	0
 #define	PI_VERSION_1		1