diff --git a/examples/CC3200/ccs/MG_hello/main.c b/examples/CC3200/ccs/MG_hello/main.c
index 623082705801e097725a160b8062a87eccf0da6a..9d3df6fe32c2362a6037abc6f161d8b7920584a0 100644
--- a/examples/CC3200/ccs/MG_hello/main.c
+++ b/examples/CC3200/ccs/MG_hello/main.c
@@ -42,7 +42,8 @@
#include "wifi.h"
-static const char *upload_form = "\
+static const char *upload_form =
+ "\
<h1>Upload file</h1> \
<form action='/upload' method='POST' enctype='multipart/form-data'> \
<input type='file' name='file'> \
@@ -80,8 +81,7 @@ void mg_ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
("HTTP request from %s: %.*s %.*s", addr, (int) hm->method.len,
hm->method.p, (int) hm->uri.len, hm->uri.p));
if (mg_vcmp(&hm->uri, "/upload") == 0 ||
- (mg_vcmp(&hm->uri, "/") == 0 &&
- mg_stat("SL:index.html", &st) != 0)) {
+ (mg_vcmp(&hm->uri, "/") == 0 && mg_stat("SL:index.html", &st) != 0)) {
mg_send(nc, upload_form, strlen(upload_form));
nc->flags |= MG_F_SEND_AND_CLOSE;
break;
@@ -114,7 +114,14 @@ void mg_ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
static void mg_init(struct mg_mgr *mgr) {
LOG(LL_INFO, ("MG task running"));
- sl_Start(0, 0, 0);
+ stop_nwp(); /* See function description in wifi.c */
+ int role = sl_Start(0, 0, 0);
+ if (role < 0) {
+ LOG(LL_ERROR, ("Failed to start NWP"));
+ return;
+ }
+
+ LOG(LL_INFO, ("NWP started"));
sl_fs_init();
diff --git a/examples/CC3200/main.c b/examples/CC3200/main.c
index b44150e640a8a9a071b8047fa8fb7e450d9883ae..e071029c624abe47bc82f6d70fadfbff6a1fbdf0 100644
--- a/examples/CC3200/main.c
+++ b/examples/CC3200/main.c
@@ -50,7 +50,8 @@
#define BM222_ADDR 0x18
#define TMP006_ADDR 0x41
-static const char *upload_form = "\
+static const char *upload_form =
+ "\
<h1>Upload file</h1> \
<form action='/upload' method='POST' enctype='multipart/form-data'> \
<input type='file' name='file'> \
@@ -88,8 +89,7 @@ static void mg_ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
("HTTP request from %s: %.*s %.*s", addr, (int) hm->method.len,
hm->method.p, (int) hm->uri.len, hm->uri.p));
if (mg_vcmp(&hm->uri, "/upload") == 0 ||
- (mg_vcmp(&hm->uri, "/") == 0 &&
- mg_stat("SL:index.html", &st) != 0)) {
+ (mg_vcmp(&hm->uri, "/") == 0 && mg_stat("SL:index.html", &st) != 0)) {
mg_send(nc, upload_form, strlen(upload_form));
nc->flags |= MG_F_SEND_AND_CLOSE;
break;
@@ -131,14 +131,20 @@ static void mg_ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
static void mg_init(struct mg_mgr *mgr) {
LOG(LL_INFO, ("MG task running"));
+
+ stop_nwp(); /* See function description in wifi.c */
+ int role = sl_Start(0, 0, 0);
+ if (role < 0) {
+ LOG(LL_ERROR, ("Failed to start NWP"));
+ return;
+ }
+ LOG(LL_INFO, ("NWP started"));
GPIO_IF_LedToggle(MCU_RED_LED_GPIO);
data_init_sensors(TMP006_ADDR, BM222_ADDR);
sl_fs_init();
- sl_Start(NULL, NULL, NULL);
-
#if defined(WIFI_STA_SSID)
if (!wifi_setup_sta(WIFI_STA_SSID, WIFI_STA_PASS)) {
LOG(LL_ERROR, ("Error setting up WiFi station"));
diff --git a/examples/CC3200/wifi.c b/examples/CC3200/wifi.c
index f8bfa112d2dfeebf1a9a7fbfdcd39b97c0da3079..6c6d10812809823bab4d25b9ce05034f3680e344 100644
--- a/examples/CC3200/wifi.c
+++ b/examples/CC3200/wifi.c
@@ -2,11 +2,14 @@
#include "mongoose.h"
+#include <simplelink/cc_pal.h>
#include <simplelink/include/wlan.h>
#include <inc/hw_types.h>
#include <driverlib/gpio.h>
+#include <driverlib/utils.h>
+
#include <example/common/gpio_if.h>
void SimpleLinkWlanEventHandler(SlWlanEvent_t *e) {
@@ -113,3 +116,50 @@ bool wifi_setup_sta(const char *ssid, const char *pass) {
}
return true;
}
+
+/*
+ * In SDK 1.2.0 TI decided to stop resetting NWP before sl_Start, which in
+ * practice means that sl_start will hang on subsequent runs after the first.
+ *
+ * See this post for details and suggested solution:
+ * https://e2e.ti.com/support/wireless_connectivity/simplelink_wifi_cc31xx_cc32xx/f/968/p/499123/1806610#1806610
+ *
+ * However, since they don't provide OS_debug variant of simplelink.a and
+ * adding another project dependency will complicate our demo even more,
+ * we just take the required bit of code.
+ *
+ * This is a copy-paste of NwpPowerOnPreamble from cc_pal.c.
+ */
+void stop_nwp(void) {
+#define MAX_RETRY_COUNT 1000
+ unsigned int sl_stop_ind, apps_int_sts_raw, nwp_lpds_wake_cfg;
+ unsigned int retry_count;
+ /* Perform the sl_stop equivalent to ensure network services
+ are turned off if active */
+ HWREG(0x400F70B8) = 1; /* APPs to NWP interrupt */
+ UtilsDelay(800000 / 5);
+
+ retry_count = 0;
+ nwp_lpds_wake_cfg = HWREG(0x4402D404);
+ sl_stop_ind = HWREG(0x4402E16C);
+
+ if ((nwp_lpds_wake_cfg != 0x20) && /* Check for NWP POR condition */
+ !(sl_stop_ind & 0x2)) /* Check if sl_stop was executed */
+ {
+ /* Loop until APPs->NWP interrupt is cleared or timeout */
+ while (retry_count < MAX_RETRY_COUNT) {
+ apps_int_sts_raw = HWREG(0x400F70C0);
+ if (apps_int_sts_raw & 0x1) {
+ UtilsDelay(800000 / 5);
+ retry_count++;
+ } else {
+ break;
+ }
+ }
+ }
+ HWREG(0x400F70B0) = 1; /* Clear APPs to NWP interrupt */
+ UtilsDelay(800000 / 5);
+
+ /* Stop the networking services */
+ NwpPowerOff();
+}
diff --git a/examples/CC3200/wifi.h b/examples/CC3200/wifi.h
index e300cbf49389614f5ad2651ff24eb131107e6dad..982fa821ba64da1f160b0093cf417beebf1053b2 100644
--- a/examples/CC3200/wifi.h
+++ b/examples/CC3200/wifi.h
@@ -10,5 +10,6 @@
bool wifi_setup_ap(const char *ssid, const char *pass, int channel);
bool wifi_setup_sta(const char *ssid, const char *pass);
+void stop_nwp();
#endif /* CS_MONGOOSE_EXAMPLES_CC3200_WIFI_H_ */