fix support for recent pi models (Zero W etc)

documentation/source/rpio_py.rst

@@ -218,8 +218,8 @@ Additions to RPi.GPIO
 
 Additional Constants
 
-* ``RPIO.RPI_REVISION`` - the current board's revision (either ``1`` or ``2``)
-* ``RPIO.RPI_REVISION_HEX`` - the cpu hex revision code (``0002`` .. ``000f``)
+* ``RPIO.RPI_REVISION`` - the current board's revision and CPU model (either ``1``, ``2``, ``3`` or ``0x103``, with 0x103 identifying BCM2709 chips on revision 3 boards)
+* ``RPIO.RPI_REVISION_HEX`` - the cpu hex revision code (``0002`` .. ``000f``) for Pi 2 (``a01041``..``a21041``) for Pi 3 (``a02082``..``a22082``)
 
 Additional Methods
 

setup.py

@@ -13,10 +13,10 @@ def read(fname):
     packages=['RPIO', 'RPIO.PWM'],
     ext_modules=[
             Extension('RPIO._GPIO', ['source/c_gpio/py_gpio.c',
-                'source/c_gpio/c_gpio.c', 'source/c_gpio/cpuinfo.c'],
+                'source/c_gpio/c_gpio.c', 'source/c_common/cpuinfo.c'],
                 extra_compile_args=["-Wno-error=declaration-after-statement"]),
             Extension('RPIO.PWM._PWM', ['source/c_pwm/pwm.c', 'source/c_pwm/mailbox.c',
-                'source/c_pwm/pwm_py.c'],
+                'source/c_pwm/pwm_py.c', 'source/c_common/cpuinfo.c'],
                 extra_compile_args=["-Wno-error=declaration-after-statement"])],
     scripts=["source/scripts/rpio", "source/scripts/rpio-curses"],
 

source/RPIO/__init__.py

@@ -159,7 +159,26 @@ def socket_callback(socket, val):
     'd': ('B', '2.0', 512, 'Egoman'),
     'e': ('B', '2.0', 512, 'Sony'),
     'f': ('B', '2.0', 512, 'Qisda'),
-    '10': ('B+', '1.0', 512, 'Sony')
+    '10': ('B+', '1.0', 512, 'Sony'),
+    '11': ('CM1', '1.0', 512, 'Sony'),
+    '12': ('A+', '1.1', 256, 'Sony'),
+    '13': ('B+', '1.2', 512, '?'),
+    '14': ('CM1', '1.0', 512, 'EMBEST'),
+    '15': ('A+', '1.1', 256, 'EMBEST'),
+    'a01040': ('2B', '1.0', 1024, '?'),
+    'a01041': ('2B', '1.1', 1024, 'Sony'),
+    'a21041': ('2B', '1.1', 1024, 'EMBEST'),
+    'a22042': ('2B', '1.2', 1024, 'EMBEST'),
+    '900021': ('A+', '1.1', 512, 'Sony'),
+    '900032': ('B+', '1.2', 512, 'Sony'),
+    '900092': ('Zero', '1.2', 512, 'Sony'),
+    '900093': ('Zero', '1.3', 512, 'Sony'),
+    '920093': ('Zero', '1.3', 512, 'Embest'),
+    '9000c1': ('Zero W', '1.1', 512, 'Sony'),
+    'a02082': ('3B', '1.2', 1024, 'Sony'),
+    'a020a0': ('CM3', '1.0', 1024, 'Sony'),
+    'a22082': ('3B', '1.0', 1024, 'EMBEST'),
+    'a32082': ('3B', '1.0', 1024, 'Sony Japan'),
 }
 
 # List of valid bcm gpio ids for raspberry rev1, rev2 and rev3. Used for inspect-all.

source/c_gpio/cpuinfo.c → source/c_common/cpuinfo.c

@@ -42,6 +42,8 @@ get_cpuinfo_revision(char *revision_hex)
     char buffer[1024];
     char hardware[1024];
     int  rpi_found = 0;
+	int  bcm2709 = 0;
+	int board_rev = 3;
 
     if ((fp = fopen("/proc/cpuinfo", "r")) == NULL)
         return -1;
@@ -52,9 +54,11 @@ get_cpuinfo_revision(char *revision_hex)
         if (strcmp(hardware, "BCM2708") == 0||
             strcmp(hardware, "BCM2709") == 0||
             strcmp(hardware, "BCM2835") == 0||
-            strcmp(hardware, "BCM2836") == 0
-           )
+            strcmp(hardware, "BCM2836") == 0)
             rpi_found = 1;
+
+        if (strcmp(hardware, "BCM2709") == 0)
+            bcm2709 = 1;
         sscanf(buffer, "Revision	: %s", revision_hex);
     }
     fclose(fp);
@@ -72,15 +76,54 @@ get_cpuinfo_revision(char *revision_hex)
 
     // Returns revision
     if ((strcmp(revision_hex, "0002") == 0) ||
-        (strcmp(revision_hex, "0003") == 0)) {
-        return 1;
-    } else if ((strcmp(revision_hex, "0010") == 0)) {
-        // We'll call Model B+ (0010) rev3
-        return 3;
-    } else {
-        // assume rev 2 (0004 0005 0006 ...)
-        return 2;
-    }
+        (strcmp(revision_hex, "0003") == 0))
+        board_rev = 1;
+    else if ((strcmp(revision_hex, "0004") == 0)
+        || (strcmp(revision_hex, "0005") == 0)
+        || (strcmp(revision_hex, "0006") == 0)
+        || (strcmp(revision_hex, "0007") == 0)
+        || (strcmp(revision_hex, "0008") == 0)
+        || (strcmp(revision_hex, "0009") == 0)
+        || (strcmp(revision_hex, "000d") == 0)
+        || (strcmp(revision_hex, "000e") == 0)
+        || (strcmp(revision_hex, "000f") == 0))
+        board_rev = 2;
+    else   // We'll call Model A+, B+, Pi2, Pi3 and Zero rev3
+        board_rev = 3;
 
-    return -1;
+    return (bcm2709 << 8) | board_rev;
 }
+
+uint32_t get_peri_base(void){
+	uint32_t base = 0x20000000;
+	FILE * filp;
+	char buf[512];
+
+	filp = fopen ("/proc/cpuinfo", "r");
+
+	if (filp != NULL)
+	{
+		while (fgets(buf, sizeof(buf), filp) != NULL)
+		{
+			if (!strncasecmp("model name", buf, 10))
+			{
+				if (strstr (buf, "ARMv6") != NULL)
+				{
+					base = 0x20000000;
+					break;
+				}
+				else if ((strstr (buf, "ARMv7") != NULL) | //
+						(strstr (buf, "ARMv8") != NULL) | 
+						(strstr (buf, "CPU architecture: 7") != NULL) | // aarch64 kernel may report this way
+						(strstr (buf, "CPU architecture: 8") != NULL)) // aarch64 kernel may report this way
+				{
+					base = 0x3F000000;
+					break;
+				}
+			}
+		}
+
+		fclose(filp);
+	}
+	return base;
+}

source/c_gpio/cpuinfo.h → source/c_common/cpuinfo.h

@@ -22,4 +22,9 @@
  *
  *     http://pythonhosted.org/RPIO
  */
-int get_cpuinfo_revision(char *revision_hex);
+
+#include <stdint.h>
+
+int get_cpuinfo_revision(char *revision_hex);
+
+uint32_t get_peri_base(void);

source/c_gpio/Makefile

@@ -1,4 +1,4 @@
-all: gpio2.6 gpio2.7 gpio3.2
+all: gpio2.6 gpio2.7 gpio3.2 gpio3.3 gpio3.4
 
 gpio2.6:
 	mkdir -p build
@@ -21,5 +21,33 @@ gpio3.2:
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.2mu -c cpuinfo.c -o build/cpuinfo.o
 	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/py_gpio.o build/c_gpio.o build/cpuinfo.o -o build/_GPIO.so
 
+gpio3.3:
+	mkdir -p build
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3mu -c py_gpio.c -o build/py_gpio.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3mu -c c_gpio.c -o build/c_gpio.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/py_gpio.o build/c_gpio.o build/cpuinfo.o -o build/_GPIO.so
+
+gpio3.4:
+	mkdir -p build
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.4mu -c py_gpio.c -o build/py_gpio.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.4mu -c c_gpio.c -o build/c_gpio.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.4mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/py_gpio.o build/c_gpio.o build/cpuinfo.o -o build/_GPIO.so
+
+gpio3.5:
+	mkdir -p build
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.5mu -c py_gpio.c -o build/py_gpio.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.5mu -c c_gpio.c -o build/c_gpio.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.5mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/py_gpio.o build/c_gpio.o build/cpuinfo.o -o build/_GPIO.so
+
+gpio3.6:
+	mkdir -p build
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.6mu -c py_gpio.c -o build/py_gpio.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.6mu -c c_gpio.c -o build/c_gpio.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.6mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/py_gpio.o build/c_gpio.o build/cpuinfo.o -o build/_GPIO.so
+
 clean:
 	rm -rf build

source/c_gpio/c_gpio.c

@@ -31,9 +31,11 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 #include "c_gpio.h"
+#include "../c_common/cpuinfo.h"
 
-#define BCM2708_PERI_BASE   0x20000000
-#define GPIO_BASE           (BCM2708_PERI_BASE + 0x200000)
+//#define BCM2708_PERI_BASE   0x20000000
+//#define BCM2709_PERI_BASE   0x3f000000
+#define GPIO_BASE           (peri_base + 0x200000)
 #define OFFSET_FSEL         0   // 0x0000
 #define OFFSET_SET          7   // 0x001c / 4
 #define OFFSET_CLR          10  // 0x0028 / 4
@@ -52,6 +54,7 @@
 #define BLOCK_SIZE (4*1024)
 
 static volatile uint32_t *gpio_map;
+static uint32_t peri_base;
 
 // `short_wait` waits 150 cycles
 void
@@ -67,7 +70,8 @@ short_wait(void)
 int
 setup(void)
 {
-    int mem_fd;
+    int mem_fd, type;
+    char revision_hex[1024];
     uint8_t *gpio_mem;
 
     if ((mem_fd = open("/dev/mem", O_RDWR|O_SYNC) ) < 0)
@@ -79,6 +83,13 @@ setup(void)
     if ((uint32_t)gpio_mem % PAGE_SIZE)
         gpio_mem += PAGE_SIZE - ((uint32_t)gpio_mem % PAGE_SIZE);
 
+//    type = get_cpuinfo_revision(revision_hex);
+	peri_base = get_peri_base();
+//    if ((type & 0x100) == 0)
+//        peri_base = BCM2708_PERI_BASE;
+//    else
+//        peri_base = BCM2709_PERI_BASE;
+
     gpio_map = (uint32_t *)mmap( (caddr_t)gpio_mem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, mem_fd, GPIO_BASE);
 
     if ((uint32_t)gpio_map < 0)

source/c_gpio/py_gpio.c

@@ -27,7 +27,7 @@
  */
 #include "Python.h"
 #include "c_gpio.h"
-#include "cpuinfo.h"
+#include "../c_common/cpuinfo.h"
 
 // All these will get exposed via the Python module
 static PyObject *WrongDirectionException;
@@ -54,7 +54,7 @@ static PyObject *version;
 // eg. gpio_id = *(*pin_to_gpio_rev2 + board_pin_id);
 static const int pin_to_gpio_rev1[41] = {-1, -1, -1, 0, -1, 1, -1, 4, 14, -1, 15, 17, 18, 21, -1, 22, 23, -1, 24, 10, -1, 9, 25, 11, 8, -1, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
 static const int pin_to_gpio_rev2[41] = {-1, -1, -1, 2, -1, 3, -1, 4, 14, -1, 15, 17, 18, 27, -1, 22, 23, -1, 24, 10, -1, 9, 25, 11, 8, -1, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
-static const int pin_to_gpio_rev3[41] = {-1, -1, -1, 2, -1, 3, -1, 4, 14, -1, 15, 17, 18, 27, -1, 22, 23, -1, 24, 10, -1, 9, 24, 11, 7, -1, 7, -1, -1, 5, -1, 6, 12, 13, -1, 19, 16, 26, 20, -1, 21};
+static const int pin_to_gpio_rev3[41] = {-1, -1, -1, 2, -1, 3, -1, 4, 14, -1, 15, 17, 18, 27, -1, 22, 23, -1, 24, 10, -1, 9, 25, 11, 8, -1, 7, -1, -1, 5, -1, 6, 12, 13, -1, 19, 16, 26, 20, -1, 21};
 static const int (*pin_to_gpio)[41];
 
 // Board header info is shifted left 8 bits (leaves space for up to 255 channel ids per header)
@@ -519,7 +519,7 @@ PyMODINIT_FUNC init_GPIO(void)
 
     // detect board revision and set up accordingly
     cache_rpi_revision();
-    switch (revision_int) {
+    switch (revision_int & 0xff) {
     case 1:
         pin_to_gpio = &pin_to_gpio_rev1;
         gpio_to_pin = &gpio_to_pin_rev1;

source/c_pwm/Makefile

@@ -1,4 +1,4 @@
-all: pwm py
+all: pwm py2.6 py2.7 py3.2 py3.3 py3.4 py3.5 py3.6
 
 pwm:
 	gcc -Wall -g -O2 -o pwm pwm.c
@@ -8,21 +8,60 @@ py2.6:
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c mailbox.c -o build/mailbox.o
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c pwm.c -o build/pwm.o
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c pwm_py.c -o build/pwm_py.o
-	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/pwm.o build/pwm_py.o -o _PWM.so
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/cpuinfo.o build/pwm.o build/pwm_py.o -o _PWM.so
 	rm -rf build
 
 py2.7:
 	mkdir -p build
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c mailbox.c -o build/mailbox.o
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c pwm.c -o build/pwm.o
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c pwm_py.c -o build/pwm_py.o
-	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/pwm.o build/pwm_py.o -o _PWM.so
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/cpuinfo.o build/pwm.o build/pwm_py.o -o _PWM.so
 	rm -rf build
 
 py3.2:
 	mkdir -p build
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.2mu -c mailbox.c -o build/mailbox.o
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.2mu -c pwm.c -o build/pwm.o
 	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.2mu -c pwm_py.c -o build/pwm_py.o
-	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/pwm.o build/pwm_py.o -o _PWM.so
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.2mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/cpuinfo.o build/pwm.o build/pwm_py.o -o _PWM.so
 	rm -rf build
+
+py3.3:
+	mkdir -p build
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3mu -c mailbox.c -o build/mailbox.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3mu -c pwm.c -o build/pwm.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3mu -c pwm_py.c -o build/pwm_py.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/cpuinfo.o build/pwm.o build/pwm_py.o -o _PWM.so
+	rm -rf build
+
+py3.4:
+	mkdir -p build
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.4mu -c mailbox.c -o build/mailbox.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.4mu -c pwm.c -o build/pwm.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.4mu -c pwm_py.c -o build/pwm_py.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.4mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/cpuinfo.o build/pwm.o build/pwm_py.o -o _PWM.so
+	rm -rf build
+
+py3.5:
+	mkdir -p build
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.5mu -c mailbox.c -o build/mailbox.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.5mu -c pwm.c -o build/pwm.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.5mu -c pwm_py.c -o build/pwm_py.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.5mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/cpuinfo.o build/pwm.o build/pwm_py.o -o _PWM.so
+	rm -rf build
+
+py3.6:
+	mkdir -p build
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.6mu -c mailbox.c -o build/mailbox.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.6mu -c pwm.c -o build/pwm.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.6mu -c pwm_py.c -o build/pwm_py.o
+	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.6mu -c cpuinfo.c -o build/cpuinfo.o
+	gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro build/mailbox.o build/cpuinfo.o build/pwm.o build/pwm_py.o -o _PWM.so
+	rm -rf build

source/c_pwm/mailbox.c

@@ -34,6 +34,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <stdint.h>
 #include <sys/mman.h>
 #include <sys/ioctl.h>
+#include <sys/stat.h>
 
 #include "mailbox.h"
 
@@ -249,9 +250,17 @@ int mbox_open() {
    // open a char device file used for communicating with kernel mbox driver
    file_desc = open(DEVICE_FILE_NAME, 0);
    if (file_desc < 0) {
-      printf("Can't open device file: %s\n", DEVICE_FILE_NAME);
-      printf("Try creating a device file with: sudo mknod %s c %d 0\n", DEVICE_FILE_NAME, MAJOR_NUM);
-      exit(-1);
+      unlink(DEVICE_FILE_NAME);
+      if (mknod(DEVICE_FILE_NAME, S_IFCHR|0600, makedev(MAJOR_NUM, 0)) < 0) {
+         printf("Failed to create mailbox device\n");
+         exit(-1);
+      }
+      file_desc = open(DEVICE_FILE_NAME, 0);
+      if (file_desc < 0) {
+         printf("Can't open device file: %s\n", DEVICE_FILE_NAME);
+         printf("Try creating a device file with: sudo mknod %s c %d 0\n", DEVICE_FILE_NAME, MAJOR_NUM);
+         exit(-1);
+      }
    }
    return file_desc;
 }

source/c_pwm/mailbox.h

@@ -29,9 +29,9 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #define MAJOR_NUM 100
 #define IOCTL_MBOX_PROPERTY _IOWR(MAJOR_NUM, 0, char *)
-#define DEVICE_FILE_NAME "/dev/vcio-mb"
+#define DEVICE_FILE_NAME "/dev/vcio"
 
-int mbox_open();
+int mbox_open(void);
 void mbox_close(int file_desc);
 
 unsigned get_version(int file_desc);