stmhal: Initial implementation of cc3k module and driver.

Pulled in and modified work done by mux/iabdalkader on cc3k driver, from
iabdalkader-cc3k-update branch.  That branch was terribly messy and had
too many conflicts to merge neatly.

stmhal/Makefile

@@ -22,7 +22,6 @@ HAL_DIR=hal
 USBDEV_DIR=usbdev
 #USBHOST_DIR=usbhost
 FATFS_DIR=fatfs
-CC3K_DIR=cc3k
 DFU=../tools/dfu.py
 # may need to prefix dfu-util with sudo
 DFU_UTIL ?= dfu-util
@@ -39,7 +38,6 @@ INC += -I$(HAL_DIR)/inc
 INC += -I$(USBDEV_DIR)/core/inc -I$(USBDEV_DIR)/class/cdc_msc_hid/inc
 #INC += -I$(USBHOST_DIR)
 INC += -I$(FATFS_DIR)/src
-INC += -I$(CC3K_DIR)
 
 CFLAGS_CORTEX_M4 = -mthumb -mtune=cortex-m4 -mabi=aapcs-linux -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -fsingle-precision-constant -Wdouble-promotion
 CFLAGS = $(INC) -Wall -Werror -ansi -std=gnu99 -nostdlib $(CFLAGS_MOD) $(CFLAGS_CORTEX_M4) $(COPT)
@@ -187,19 +185,6 @@ SRC_FATFS = $(addprefix $(FATFS_DIR)/src/,\
 	option/ccsbcs.c \
 	)
 
-SRC_CC3K = $(addprefix $(CC3K_DIR)/,\
-	cc3000_common.c \
-	evnt_handler.c \
-	hci.c \
-	netapp.c \
-	nvmem.c \
-	security.c \
-	socket.c \
-	wlan.c \
-	ccspi.c \
-	pybcc3k.c \
-	)
-
 ifeq ($(MICROPY_PY_WIZNET5K),1)
 WIZNET5K_DIR=drivers/wiznet5k
 INC += -I$(TOP)/$(WIZNET5K_DIR)
@@ -213,6 +198,30 @@ SRC_MOD += $(addprefix $(WIZNET5K_DIR)/,\
 	)
 endif
 
+# for CC3000 module
+ifeq ($(MICROPY_PY_CC3K),1)
+CC3000_DIR=drivers/cc3000
+INC += -I$(TOP)/$(CC3000_DIR)/inc
+CFLAGS_MOD += -DMICROPY_PY_CC3K=1
+SRC_MOD += modcc3k.c
+SRC_MOD += $(addprefix $(CC3000_DIR)/src/,\
+	cc3000_common.c \
+	evnt_handler.c \
+	hci.c \
+	netapp.c \
+	nvmem.c \
+	security.c \
+	socket.c \
+	wlan.c \
+	ccspi.c \
+	inet_ntop.c \
+	inet_pton.c \
+	)
+#	patch.c \
+#	patch_prog.c \
+	)
+endif
+
 OBJ =
 OBJ += $(PY_O)
 OBJ += $(addprefix $(BUILD)/, $(SRC_LIB:.c=.o))
@@ -221,7 +230,6 @@ OBJ += $(addprefix $(BUILD)/, $(SRC_S:.s=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_HAL:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_USBDEV:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_FATFS:.c=.o))
-OBJ += $(addprefix $(BUILD)/, $(SRC_CC3K:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_MOD:.c=.o))
 OBJ += $(BUILD)/pins_$(BOARD).o
 

stmhal/boards/HYDRABUS/mpconfigboard.h

@@ -16,7 +16,6 @@
 #define MICROPY_HW_ENABLE_I2C1      (1)
 #define MICROPY_HW_ENABLE_SPI1      (1)
 #define MICROPY_HW_ENABLE_SPI3      (1)
-#define MICROPY_HW_ENABLE_CC3K      (0)
 
 // USRSW/UBTN (Needs Jumper UBTN) is pulled low. Pressing the button makes the input go high.
 #define MICROPY_HW_USRSW_PIN        (pin_A0)

stmhal/boards/NETDUINO_PLUS_2/mpconfigboard.h

@@ -20,7 +20,6 @@
 #define MICROPY_HW_ENABLE_I2C1      (0)
 #define MICROPY_HW_ENABLE_SPI1      (0)
 #define MICROPY_HW_ENABLE_SPI3      (0)
-#define MICROPY_HW_ENABLE_CC3K      (0)
 
 // USRSW is pulled low. Pressing the button makes the input go high.
 #define MICROPY_HW_USRSW_PIN        (pin_B11)

stmhal/boards/PYBV10/mpconfigboard.h

@@ -17,7 +17,6 @@
 #define MICROPY_HW_ENABLE_I2C1      (1)
 #define MICROPY_HW_ENABLE_SPI1      (1)
 #define MICROPY_HW_ENABLE_SPI3      (0)
-#define MICROPY_HW_ENABLE_CC3K      (0)
 
 // USRSW has no pullup or pulldown, and pressing the switch makes the input go low
 #define MICROPY_HW_USRSW_PIN        (pin_B3)

stmhal/boards/PYBV3/mpconfigboard.h

@@ -16,7 +16,6 @@
 #define MICROPY_HW_ENABLE_I2C1      (1)
 #define MICROPY_HW_ENABLE_SPI1      (1)
 #define MICROPY_HW_ENABLE_SPI3      (0)
-#define MICROPY_HW_ENABLE_CC3K      (0)
 
 // USRSW has no pullup or pulldown, and pressing the switch makes the input go low
 #define MICROPY_HW_USRSW_PIN        (pin_A13)

stmhal/boards/PYBV4/mpconfigboard.h

@@ -16,7 +16,6 @@
 #define MICROPY_HW_ENABLE_I2C1      (1)
 #define MICROPY_HW_ENABLE_SPI1      (1)
 #define MICROPY_HW_ENABLE_SPI3      (0)
-#define MICROPY_HW_ENABLE_CC3K      (0)
 
 // USRSW has no pullup or pulldown, and pressing the switch makes the input go low
 #define MICROPY_HW_USRSW_PIN        (pin_B3)

stmhal/boards/STM32F4DISC/mpconfigboard.h

@@ -16,7 +16,6 @@
 #define MICROPY_HW_ENABLE_I2C1      (1)
 #define MICROPY_HW_ENABLE_SPI1      (1)
 #define MICROPY_HW_ENABLE_SPI3      (0)
-#define MICROPY_HW_ENABLE_CC3K      (0)
 
 // USRSW is pulled low. Pressing the button makes the input go high.
 #define MICROPY_HW_USRSW_PIN        (pin_A0)

stmhal/modcc3k.c

+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// We can't include stdio.h because it defines _types_fd_set, but we
+// need to use the CC3000 version of this type.
+
+// We can't include errno.h because CC3000 defines its own errnos.
+// (And they are different to the standard ones!)
+
+#include <std.h>
+#include <string.h>
+
+#include "stm32f4xx_hal.h"
+#include "mpconfig.h"
+#include "nlr.h"
+#include "misc.h"
+#include "qstr.h"
+#include "obj.h"
+#include "objtuple.h"
+#include "stream.h"
+#include "runtime.h"
+#include "pin.h"
+#include "genhdr/pins.h"
+#include "spi.h"
+
+#include "hci.h"
+#include "socket.h"
+#include "inet_ntop.h"
+#include "inet_pton.h"
+#include "ccspi.h"
+#include "wlan.h"
+#include "nvmem.h"
+#include "netapp.h"
+#include "patch_prog.h"
+
+STATIC const mp_obj_type_t cc3k_type;
+STATIC const mp_obj_type_t cc3k_socket_type;
+
+STATIC mp_obj_t cc3k_socket_new(mp_uint_t family, mp_uint_t type, mp_uint_t protocol);
+
+STATIC volatile uint32_t fd_state = 0;
+STATIC volatile bool wlan_connected = false;
+STATIC volatile bool ip_obtained = false;
+
+STATIC int cc3k_get_fd_state(int fd) {
+    return (fd_state & (1<<fd));
+}
+
+STATIC void cc3k_clear_fd_state(int fd) {
+    // reset socket state
+    fd_state &= ~(1<<fd);
+}
+
+STATIC void cc3k_callback(long event_type, char *data, unsigned char length) {
+    switch (event_type) {
+        case HCI_EVNT_WLAN_UNSOL_CONNECT:
+            wlan_connected = true;
+            break;
+        case HCI_EVNT_WLAN_UNSOL_DISCONNECT:
+            // link down
+            wlan_connected = false;
+            ip_obtained = false;
+            break;
+        case HCI_EVNT_WLAN_UNSOL_DHCP:
+            ip_obtained = true;
+            break;
+        case HCI_EVNT_BSD_TCP_CLOSE_WAIT:
+            // mark socket for closure
+            fd_state |= (1<<((uint8_t)data[0]));
+            break;
+    }
+}
+
+/******************************************************************************/
+// Micro Python bindings; CC3k class
+
+typedef struct _cc3k_obj_t {
+    mp_obj_base_t base;
+} cc3k_obj_t;
+
+/// \classmethod \constructor(spi, pin_cs, pin_en, pin_irq)
+/// Initialise the CC3000 using the given SPI bus and pins and return a CC3k object.
+//
+// Note: pins were originally hard-coded to:
+//      PYBv1.0: init(pyb.SPI(2), pyb.Pin.board.Y5, pyb.Pin.board.Y4, pyb.Pin.board.Y3)
+//        [SPI on Y position; Y6=B13=SCK, Y7=B14=MISO, Y8=B15=MOSI]
+//
+//      STM32F4DISC: init(pyb.SPI(2), pyb.Pin.cpu.A15, pyb.Pin.cpu.B10, pyb.Pin.cpu.B11)
+STATIC mp_obj_t cc3k_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
+    // check arguments
+    mp_arg_check_num(n_args, n_kw, 4, 4, false);
+
+    // set the pins to use
+    SpiInit(
+        spi_get_handle(args[0]),
+        pin_find(args[1]),
+        pin_find(args[2]),
+        pin_find(args[3])
+    );
+
+    // initialize and start the module
+    wlan_init(cc3k_callback, NULL, NULL, NULL,
+            ReadWlanInterruptPin, SpiResumeSpi, SpiPauseSpi, WriteWlanPin);
+
+    if (wlan_start(0) != 0) {
+        nlr_raise(mp_obj_new_exception_msg(
+                    &mp_type_OSError, "Failed to init wlan module"));
+    }
+
+    // set connection policy. this should be called explicitly by the user
+    // wlan_ioctl_set_connection_policy(0, 0, 0);
+
+    // Mask out all non-required events from the CC3000
+    wlan_set_event_mask(HCI_EVNT_WLAN_KEEPALIVE|
+                        HCI_EVNT_WLAN_UNSOL_INIT|
+                        HCI_EVNT_WLAN_ASYNC_PING_REPORT|
+                        HCI_EVNT_WLAN_ASYNC_SIMPLE_CONFIG_DONE);
+
+    cc3k_obj_t *cc3k = m_new_obj(cc3k_obj_t);
+    cc3k->base.type = &cc3k_type;
+
+    return cc3k;
+}
+
+STATIC mp_obj_t cc3k_connect(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
+    int ssid_len =0;
+    const char *ssid = NULL;
+    const char *bssid = NULL;
+
+    int key_len =0;
+    int sec = WLAN_SEC_UNSEC;
+    const char *key = NULL;
+
+    mp_map_elem_t *kw_key, *kw_sec, *kw_bssid;
+
+    ssid = mp_obj_str_get_str(args[1]);
+    ssid_len = strlen(ssid);
+
+    // get KW args
+    kw_key = mp_map_lookup(kw_args, MP_OBJ_NEW_QSTR(qstr_from_str("key")), MP_MAP_LOOKUP);
+    kw_sec = mp_map_lookup(kw_args, MP_OBJ_NEW_QSTR(qstr_from_str("sec")), MP_MAP_LOOKUP);
+    kw_bssid = mp_map_lookup(kw_args, MP_OBJ_NEW_QSTR(qstr_from_str("bssid")), MP_MAP_LOOKUP);
+
+    // get key and sec
+    if (kw_key && kw_sec) {
+        key = mp_obj_str_get_str(kw_key->value);
+        key_len = strlen(key);
+
+        sec = mp_obj_get_int(kw_sec->value);
+        if (!(WLAN_SEC_UNSEC < sec && sec <= WLAN_SEC_WPA2)) {
+            nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "invalid security mode"));
+        }
+    }
+
+    // get bssid
+    if (kw_bssid != NULL) {
+        bssid = mp_obj_str_get_str(kw_bssid->value);
+    }
+
+    // connect to AP
+    if (wlan_connect(sec, (char*) ssid, ssid_len, (uint8_t*)bssid, (uint8_t*)key, key_len) != 0) {
+        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "could not connect to ssid=%s, sec=%d, key=%s\n", ssid, sec, key));
+    }
+
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(cc3k_connect_obj, 2, cc3k_connect);
+
+STATIC mp_obj_t cc3k_disconnect(mp_obj_t self_in) {
+    int ret = wlan_disconnect();
+    return mp_obj_new_int(ret);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(cc3k_disconnect_obj, cc3k_disconnect);
+
+STATIC mp_obj_t cc3k_is_connected(mp_obj_t self_in) {
+    if (wlan_connected && ip_obtained) {
+        return mp_const_true;
+    }
+    return mp_const_false;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(cc3k_is_connected_obj, cc3k_is_connected);
+
+STATIC mp_obj_t cc3k_ifconfig(mp_obj_t self_in) {
+    tNetappIpconfigRetArgs ipconfig={{0}};
+
+    uint8_t *ip = &ipconfig.aucIP[0];
+    uint8_t *mask= &ipconfig.aucSubnetMask[0];
+    uint8_t *gw= &ipconfig.aucDefaultGateway[0];
+    uint8_t *dhcp= &ipconfig.aucDHCPServer[0];
+    uint8_t *dns= &ipconfig.aucDNSServer[0];
+    uint8_t *mac= &ipconfig.uaMacAddr[0];
+    uint8_t *ssid= &ipconfig.uaSSID[0];
+
+    netapp_ipconfig(&ipconfig);
+
+    printf ("IP:%d.%d.%d.%d\n"  \
+            "Mask:%d.%d.%d.%d\n"\
+            "GW:%d.%d.%d.%d\n"  \
+            "DHCP:%d.%d.%d.%d\n"\
+            "DNS:%d.%d.%d.%d\n" \
+            "MAC:%02X:%02X:%02X:%02X:%02X:%02X\n"\
+            "SSID: %s\n",
+            ip[3], ip[2], ip[1], ip[0],
+            mask[3], mask[2], mask[1], mask[0],
+            gw[3], gw[2], gw[1], gw[0],
+            dhcp[3], dhcp[2], dhcp[1], dhcp[0],
+            dns[3], dns[2], dns[1], dns[0],
+            mac[5], mac[4], mac[3], mac[2], mac[1], mac[0], ssid);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(cc3k_ifconfig_obj, cc3k_ifconfig);
+
+STATIC mp_obj_t cc3k_patch_version(mp_obj_t self_in) {
+    uint8_t pver[2];
+    mp_obj_tuple_t *t_pver;
+
+    nvmem_read_sp_version(pver);
+    t_pver = mp_obj_new_tuple(2, NULL);
+    t_pver->items[0] = mp_obj_new_int(pver[0]);
+    t_pver->items[1] = mp_obj_new_int(pver[1]);
+    return t_pver;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(cc3k_patch_version_obj, cc3k_patch_version);
+
+STATIC mp_obj_t cc3k_patch_program(mp_obj_t self_in) {
+    //patch_prog_start();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(cc3k_patch_program_obj, cc3k_patch_program);
+
+/// \method socket(family=AF_INET, type=SOCK_STREAM, fileno=-1)
+/// Create a socket.
+STATIC const mp_arg_t cc3k_socket_args[] = {
+    { MP_QSTR_family, MP_ARG_INT, {.u_int = AF_INET} },
+    { MP_QSTR_type,   MP_ARG_INT, {.u_int = SOCK_STREAM} },
+};
+#define PYB_CC3K_SOCKET_NUM_ARGS MP_ARRAY_SIZE(cc3k_socket_args)
+STATIC mp_obj_t cc3k_socket(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
+    // parse args
+    mp_arg_val_t vals[PYB_CC3K_SOCKET_NUM_ARGS];
+    mp_arg_parse_all(n_args - 1, args + 1, kw_args, PYB_CC3K_SOCKET_NUM_ARGS, cc3k_socket_args, vals);
+
+    return cc3k_socket_new(vals[0].u_int, vals[1].u_int, 0);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(cc3k_socket_obj, 1, cc3k_socket);
+
+STATIC mp_obj_t cc3k_gethostbyname(mp_obj_t self_in, mp_obj_t hostname) {
+    mp_uint_t len;
+    const char *host = mp_obj_str_get_data(hostname, &len);
+    uint32_t ip;
+
+    if (gethostbyname((char*)host, len, &ip) < 0) {
+        // TODO raise appropriate exception
+        printf("gethostbyname failed\n");
+        return mp_const_none;
+    }
+
+    if (ip == 0) {
+        // unknown host
+        // TODO CPython raises: socket.gaierror: [Errno -2] Name or service not known
+        printf("Name or service not known\n");
+        return mp_const_none;
+    }
+
+    // turn the ip address into a string (could use inet_ntop, but this here is much more efficient)
+    VSTR_FIXED(ip_str, 16);
+    vstr_printf(&ip_str, "%u.%u.%u.%u", (ip >> 24) & 0xff, (ip >> 16) & 0xff, (ip >> 8) & 0xff, ip & 0xff);
+    mp_obj_t ret = mp_obj_new_str(ip_str.buf, ip_str.len, false);
+
+    return ret;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(cc3k_gethostbyname_obj, cc3k_gethostbyname);
+
+STATIC const mp_map_elem_t cc3k_locals_dict_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR_connect), (mp_obj_t)&cc3k_connect_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_disconnect), (mp_obj_t)&cc3k_disconnect_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_is_connected), (mp_obj_t)&cc3k_is_connected_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ifconfig), (mp_obj_t)&cc3k_ifconfig_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_patch_version), (mp_obj_t)&cc3k_patch_version_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_patch_program), (mp_obj_t)&cc3k_patch_program_obj },
+
+    { MP_OBJ_NEW_QSTR(MP_QSTR_socket), (mp_obj_t)&cc3k_socket_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_gethostbyname), (mp_obj_t)&cc3k_gethostbyname_obj },
+
+    // class constants
+
+    { MP_OBJ_NEW_QSTR(MP_QSTR_WEP), MP_OBJ_NEW_SMALL_INT(WLAN_SEC_WEP) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_WPA), MP_OBJ_NEW_SMALL_INT(WLAN_SEC_WPA) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_WPA2), MP_OBJ_NEW_SMALL_INT(WLAN_SEC_WPA2) },
+
+    { MP_OBJ_NEW_QSTR(MP_QSTR_AF_INET), MP_OBJ_NEW_SMALL_INT(AF_INET) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_AF_INET6), MP_OBJ_NEW_SMALL_INT(AF_INET6) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_STREAM), MP_OBJ_NEW_SMALL_INT(SOCK_STREAM) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_DGRAM), MP_OBJ_NEW_SMALL_INT(SOCK_DGRAM) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_SOCK_RAW), MP_OBJ_NEW_SMALL_INT(SOCK_RAW) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_IP), MP_OBJ_NEW_SMALL_INT(IPPROTO_IP) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_ICMP), MP_OBJ_NEW_SMALL_INT(IPPROTO_ICMP) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_IPV4), MP_OBJ_NEW_SMALL_INT(IPPROTO_IPV4) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_TCP), MP_OBJ_NEW_SMALL_INT(IPPROTO_TCP) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_UDP), MP_OBJ_NEW_SMALL_INT(IPPROTO_UDP) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_IPV6), MP_OBJ_NEW_SMALL_INT(IPPROTO_IPV6) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_IPPROTO_RAW), MP_OBJ_NEW_SMALL_INT(IPPROTO_RAW) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(cc3k_locals_dict, cc3k_locals_dict_table);
+
+STATIC const mp_obj_type_t cc3k_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_CC3k,
+    //.print = cc3k_print,
+    .make_new = cc3k_make_new,
+    .locals_dict = (mp_obj_t)&cc3k_locals_dict,
+};
+
+/******************************************************************************/
+// Micro Python bindings; CC3k socket class
+
+#define EPIPE               (32)
+//#define MAX_FD              (8)
+#define MAX_ADDRSTRLEN      (128)
+#define MAX_RX_PACKET       (CC3000_RX_BUFFER_SIZE-CC3000_MINIMAL_RX_SIZE-1)
+#define MAX_TX_PACKET       (CC3000_TX_BUFFER_SIZE-CC3000_MINIMAL_TX_SIZE-1)
+
+typedef struct _cc3k_socket_obj_t {
+    mp_obj_base_t base;
+    int fd;
+} cc3k_socket_obj_t;
+
+STATIC mp_obj_t cc3k_socket_new(mp_uint_t family, mp_uint_t type, mp_uint_t protocol) {
+    // create socket object
+    cc3k_socket_obj_t *s = m_new_obj_with_finaliser(cc3k_socket_obj_t);
+    s->base.type = (mp_obj_t)&cc3k_socket_type;
+
+    // open socket
+    s->fd = socket(family, type, protocol);
+    if (s->fd < 0) {
+        m_del_obj(cc3k_socket_obj_t, s);
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "socket failed"));
+    }
+
+    // clear socket state
+    cc3k_clear_fd_state(s->fd);
+
+    return s;
+}
+
+STATIC void cc3k_socket_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
+    cc3k_socket_obj_t *self = self_in;
+    printf("<CC3k.socket fd=%d>", self->fd);
+}
+
+STATIC mp_uint_t cc3k_socket_send(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {
+    cc3k_socket_obj_t *self = self_in;
+
+    if (cc3k_get_fd_state(self->fd)) {
+        closesocket(self->fd);
+        *errcode = EPIPE;
+        return 0;
+    }
+
+    // CC3K does not handle fragmentation, and will overflow,
+    // split the packet into smaller ones and send them out.
+    int bytes = 0;
+    while (bytes < size) {
+        int n = MIN((size-bytes), MAX_TX_PACKET);
+        n = send(self->fd, buf+bytes, n, 0);
+        if (n <= 0) {
+            bytes = n;
+            *errcode = errno;
+            break;
+        }
+        bytes += n;
+    }
+
+    return bytes;
+}
+
+STATIC mp_uint_t cc3k_socket_recv(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
+    cc3k_socket_obj_t *self = self_in;
+
+    if (cc3k_get_fd_state(self->fd)) {
+        closesocket(self->fd);
+        return 0;
+    }
+
+    // recv MAX_RX_PACKET
+    int bytes = 0;
+    while (bytes < size) {
+        int n = MIN((size-bytes), MAX_RX_PACKET);
+        n = recv(self->fd, buf+bytes, n, 0);
+        if (n == 0) {
+            break;
+        } else if (n < 0) {
+            bytes = n;
+            *errcode = errno;
+            break;
+        }
+        bytes += n;
+    }
+
+    return bytes;
+}
+
+STATIC mp_obj_t cc3k_socket_bind(mp_obj_t self_in, mp_obj_t addr_obj) {
+    cc3k_socket_obj_t *self = self_in;
+
+    mp_obj_t *addr;
+    mp_obj_get_array_fixed_n(addr_obj, 2, &addr);
+
+    // fill sockaddr struct
+    int port = mp_obj_get_int(addr[1]);
+    sockaddr_in addr_in = {
+        .sin_family = AF_INET,
+        .sin_port   = htons(port),
+        .sin_addr.s_addr = 0,// INADDR_ANY
+        .sin_zero   = {0}
+    };
+
+    const char *host = mp_obj_str_get_str(addr[0]);
+    if (strlen(host) && !inet_pton(AF_INET, host, &addr_in.sin_addr.s_addr)) {
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "invalid IP address"));
+    }
+
+    // bind socket
+    if (bind(self->fd, (sockaddr*) &addr_in, sizeof(sockaddr_in)) < 0) {
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "bind failed"));
+    }
+    return mp_const_true;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(cc3k_socket_bind_obj, cc3k_socket_bind);
+
+STATIC mp_obj_t cc3k_socket_listen(mp_obj_t self_in, mp_obj_t backlog) {
+    cc3k_socket_obj_t *self = self_in;
+    if (listen(self->fd, mp_obj_get_int(backlog)) < 0) {
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "listen failed"));
+    }
+
+    return mp_const_true;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(cc3k_socket_listen_obj, cc3k_socket_listen);
+
+STATIC mp_obj_t cc3k_socket_accept(mp_obj_t self_in) {
+    cc3k_socket_obj_t *self = self_in;
+    int fd;
+
+    sockaddr addr;
+    socklen_t addr_len = sizeof(sockaddr);
+
+    // accept incoming connection
+    if ((fd = accept(self->fd, &addr, &addr_len)) < 0) {
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "accept failed"));
+    }
+
+    // clear socket state
+    cc3k_clear_fd_state(fd);
+
+    // create new socket object
+    cc3k_socket_obj_t *socket_obj = m_new_obj_with_finaliser(cc3k_socket_obj_t);
+    socket_obj->base.type = (mp_obj_t)&cc3k_socket_type;
+    socket_obj->fd  = fd;
+
+    char buf[MAX_ADDRSTRLEN]={0};
+    if (inet_ntop(addr.sa_family,
+        &(((sockaddr_in*)&addr)->sin_addr), buf, MAX_ADDRSTRLEN) == NULL) {
+        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "invalid IP address"));
+    }
+
+    mp_obj_tuple_t *cli = mp_obj_new_tuple(2, NULL);
+    mp_obj_tuple_t *cli_addr = mp_obj_new_tuple(2, NULL);
+
+    cli->items[0] = socket_obj;