Wednesday, February 15, 2017

Conversion between RSSI and LQI in Z-Stack

Z-Stack uses the following formula to convert RSSI and LQI.

LinkQuality = [255* (RSSI-MIN_ED)]/[MAX_ED-MIN_ED]

Therefore with simple algebra

RSSI = MIN_ED+LinkQuality*( MAX_ED-MIN_ED)/255

Default values for MIN_ED and MAX_ED are -87 and 10 respectively.

Then, maybe you can convert RSSI to distance...

Friday, February 10, 2017

Use ZTool + Z-Stack 3.0 ZNP to set up a basic Zigbee 3.0 network

The following steps show you how to use ZTool + Z-Stack 3.0 ZNP to set up Zigbee 3.0 network:

1. You have to prepare two CC253x EVBs (CC2530DK, CC2531EMK, or CC2538EM) and run Z-Stack ZNP 3.0 FW on it.

2. You can run the following MT commands (TX in red) to setup Zigbee 3.0 coordinator.

10:36:58.53 COM1 SYS_OSAL_NV_WRITE (0x2109) --> Write startup option to clear NV when reset
    Id: 0x0003
    Offset: 0x00
    Len: 0x01
    Value: . (0x03)

10:36:58.55 COM1 SYS_OSAL_NV_WRITE_SRSP (0x6109)
    Status: SUCCESS (0x0)

10:37:06.11 COM1 SYS_RESET (0x4100) --> Do reset to clear NV
    Type: 0x00 (HARD RESET) (0x0)

10:37:08.18 COM1 SYS_RESET_RESPONSE (0x4180)
    Reason: 0x02
    TransportRev: 0x02
    Product: 0x00
    MajorRel: 0x02
    MinorRel: 0x07
    HwRev: 0x00

10:37:42.94 COM1 SYS_OSAL_NV_WRITE (0x2109) --> Write ZCD_NV_LOGICAL_TYPE to 0 which means coordinator
    Id: 0x0087
    Offset: 0x00
    Len: 0x01
    Value: . (0x00)

10:37:42.97 COM1 SYS_OSAL_NV_WRITE_SRSP (0x6109)
    Status: SUCCESS (0x0)



10:38:32.55 COM1 APP_CNF_BDB_SET_CHANNEL (0x2F08) --> Set Primary channel mask to channel 13 only
    isPrimary: TRUE (0x1)
    Channel: CHNL_0x00002000 (0x2000)

1
0:38:32.55 COM1 APP_CNF_BDB_SET_CHANNEL_SRSP (0x6F08)
    Status: SUCCESS (0x0)

10:38:34.43 COM1 APP_CNF_BDB_SET_CHANNEL (0x2F08) --> Set Secondary channel to 0x0 to disable secondary channel mask
    isPrimary: FALSE (0x0)
    Channel: NONE (0x0)

10:49:01.44 COM1 APP_CNF_BDB_SET_CHANNEL_SRSP (0x6F08)
    Status: SUCCESS (0x0)

10:38:45.58 COM1 APP_CNF_BDB_START_COMMISSIONING (0x2F05)
--> Start commissioning using network formation as parameter to start coordinator
    CommissioningMode: (0x04) Network Formation (0x4)

10:38:47.35 COM1 APP_CNF_BDB_START_COMMISSIONING_SRSP (0x6F05)
    Status: SUCCESS (0x0)

10:38:47.35 COM1 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 8 (0x8)

10:38:47.36 COM1 APP_CNF_BDB_COMMISSIONING_NOTIFICATION (0x4F80)
    Status: 1 (0x1)
    Commissioning Mode: 0x02 (Formation) (0x2)
    Commissioning Mode: 254 (0xFE)

10:38:47.62 COM1 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 8 (0x8)

10:38:47.88 COM1 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 8 (0x8)

10:38:48.15 COM1 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 8 (0x8)

10:38:48.41 COM1 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 8 (0x8)

10:38:48.68 COM1 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 8 (0x8)

10:38:48.94 COM1 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 8 (0x8)

10:38:49.49 COM1 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 9 (0x9)

10:38:49.49 COM1 APP_CNF_BDB_COMMISSIONING_NOTIFICATION (0x4F80)
    Status: 0x00 (Success) (0x0)
    Commissioning Mode: 0x02 (Formation) (0x2)
    Commissioning Mode: 69 (0x45)

10:39:11.49 COM1 UTIL_GET_DEVICE_INFO (0x2700) --> Get device info to confirm coordinator is setup correctly

10:39:11.5 COM1 UTIL_GET_DEVICE_INFO_RESPONSE (0x6700)
    Status: SUCCESS (0x0)
    IEEEAddr: 0x00124B0001025822
    ShortAddress: 0x0000
    DeviceType: COORDINATOR, ROUTER, END_DEVICE (0x7)
    DeviceState: DEV_ZB_COORD (0x9)
    NumAssocDevices: 0x00
    AssocDevicesList

10:39:26.7 COM1 SYS_OSAL_NV_WRITE (0x2109) --> Write ZCD_NV_ZDO_DIRECT_CB to 1 to receive ZDO related messages
    Id: 0x008F
    Offset: 0x00
    Len: 0x01
    Value: . (0x01)

10:39:26.71 COM1 SYS_OSAL_NV_WRITE_SRSP (0x6109)
    Status: SUCCESS (0x0) 


10:44:16.54 COM1 APP_CNF_BDB_START_COMMISSIONING (0x2F05) --> Start commissioning using network steering as parameter to be ready for device to join
    CommissioningMode: (0x02) Network Steering (0x2)

10:44:16.55 COM1 APP_CNF_BDB_START_COMMISSIONING_SRSP (0x6F05)
    Status: SUCCESS (0x0)

10:44:16.56 COM1 ZDO_MGMT_PERMIT_JOIN_RSP (0x45B6)
    SrcAddr: 0x0000
    Status: ZDP_SUCCESS (0x0)

10:44:16.57 COM1 APP_CNF_BDB_COMMISSIONING_NOTIFICATION (0x4F80)
    Status: 0x00 (Success) (0x0)
    Commissioning Mode: 0x01 (Network Steering) (0x1)
    Commissioning Mode: 67 (0x43)


3. You can run the following MT commands to setup Zigbee 3.0 router.

10:43:43.75 COM99 SYS_OSAL_NV_WRITE (0x2109) --> Write ZCD_NV_LOGICAL_TYPE to 1 which means router
    Id: 0x0087
    Offset: 0x00
    Len: 0x01
    Value: . (0x01)

10:43:59.35 COM1 APP_CNF_BDB_SET_CHANNEL (0x2F08) --> Set Primary channel mask to channel 13 only
    isPrimary: TRUE (0x1)
    Channel: CHNL_0x00002000 (0x2000)
10:43:59.35 COM1 APP_CNF_BDB_SET_CHANNEL_SRSP (0x6F08)
    Status: SUCCESS (0x0)

10:44:11.43 COM1 APP_CNF_BDB_SET_CHANNEL (0x2F08) --> Set Secondary channel to 0x0 to disable secondary channel mask
    isPrimary: FALSE (0x0)
    Channel: NONE (0x0)
10:44:11.45 COM1 APP_CNF_BDB_SET_CHANNEL_SRSP (0x6F08)
    Status: SUCCESS (0x0)

10:44:26.46 COM99 APP_CNF_BDB_START_COMMISSIONING (0x2F05) --> Start commissioning using network steering as parameter to make device to start scan Zigbee network to join
    CommissioningMode: (0x02) Network Steering (0x2)

10:44:26.46 COM99 APP_CNF_BDB_START_COMMISSIONING_SRSP (0x6F05)
    Status: SUCCESS (0x0)

10:44:26.56 COM99 APP_CNF_BDB_COMMISSIONING_NOTIFICATION (0x4F80)
    Status: 1 (0x1)
    Commissioning Mode: 0x01 (Network Steering) (0x1)
    Commissioning Mode: 0 (0x0)

10:44:26.8 COM99 ZDO_STATE_CHANGE_IND (0x45C0)
    State: INVALID_PARAMETER (0x2)

10:44:27.11 COM99 ZDO_STATE_CHANGE_IND (0x45C0)
    State: INVALID_PARAMETER (0x2)

10:44:27.37 COM99 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 3 (0x3)

10:44:27.88 COM99 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 5 (0x5)

10:44:28.24 COM99 ZDO_STATE_CHANGE_IND (0x45C0)
    State: 7 (0x7)

10:44:28.9 COM99 APP_CNF_BDB_COMMISSIONING_NOTIFICATION (0x4F80)
    Status: 0x00 (Success) (0x0)
--> Router joins coordinator successfully
    Commissioning Mode: 0x01 (Network Steering) (0x1)
    Commissioning Mode: 0 (0x0)

11:03:22.81 COM99 UTIL_GET_DEVICE_INFO (0x2700)--> Get device info to confirm router is setup correctly

11:03:22.81 COM99 UTIL_GET_DEVICE_INFO_RESPONSE (0x6700)
    Status: SUCCESS (0x0)
    IEEEAddr: 0x00124B0000E50127
    ShortAddress: 0x4EE6
    DeviceType: COORDINATOR, ROUTER, END_DEVICE (0x7)
    DeviceState: DEV_ROUTER (0x7)
    NumAssocDevices: 0x00
    AssocDevicesList
 

4. On Ztool of coordinator, you should see ZDO_END_DEVICE_ANNCE_IND pops when router joins coordinator.

10:44:28.84 COM1 ZDO_END_DEVICE_ANNCE_IND (0x45C1)
    SrcAddr: 0x4EE6
    NwkAddr: 0x4EE6
    IEEEAddr: 0x00124B0000E50127
    Capabilities: 0x8E

Thursday, February 9, 2017

How to add a COAP resource to read ADC input from DIO23 in Contiki cc26xx-web-demo on CC2650 LaunchPad.

To add a COAP resource to read ADC input from DIO23 in Contiki cc26xx-web-demo on CC2650 LaunchPad, you have to add the following code with "+" into your cc26xx-web-demo.c, cc26xx-web-demo.h, coap-server.c, and res-sensors.c.

1. /examples/cc26xx/cc26xx-web-demo/cc26xx-web-demo.c
@@ -55,9 +55,15 @@
 #include
 #include
 #include
+
+#include "ti-lib.h"
+#include "driverlib/aux_adc.h"
+#include "driverlib/aux_wuc.h"
+

 /*---------------------------------------------------------------------------*/
 PROCESS_NAME(cetic_6lbr_client_process);
 PROCESS(cc26xx_web_demo_process, "CC26XX Web Demo");
+PROCESS(adc_process, "ADC process");
 /*---------------------------------------------------------------------------*/
 /*
  * Update sensor readings in a staggered fashion every SENSOR_READING_PERIOD
@@ -84,6 +90,9 @@ static struct uip_icmp6_echo_reply_notification echo_reply_notification;
 static struct etimer echo_request_timer;
 int def_rt_rssi = 0;
 #endif
+
+uint16_t singleSample;
+

 /*---------------------------------------------------------------------------*/
 process_event_t cc26xx_web_demo_publish_event;
 process_event_t cc26xx_web_demo_config_loaded_event;
@@ -110,6 +119,9 @@ DEMO_SENSOR(batmon_temp, CC26XX_WEB_DEMO_SENSOR_BATMON_TEMP,
 DEMO_SENSOR(batmon_volt, CC26XX_WEB_DEMO_SENSOR_BATMON_VOLT,
             "Battery Volt", "battery-volt", "batmon_volt",
             CC26XX_WEB_DEMO_UNIT_VOLT);
+DEMO_SENSOR(adc_dio23, CC26XX_WEB_DEMO_SENSOR_ADC_DIO23,
+            "ADC DIO23", "adc-dio23", "adc_dio23",
+            CC26XX_WEB_DEMO_UNIT_VOLT);

 /* Sensortag sensors */
 #if BOARD_SENSORTAG
@@ -464,6 +476,14 @@ get_batmon_reading(void *data)
     }
   }

+  if(adc_dio23_reading.publish) {
+    if(1) {
+      buf = adc_dio23_reading.converted;
+      memset(buf, 0, CC26XX_WEB_DEMO_CONVERTED_LEN);
+      snprintf(buf, CC26XX_WEB_DEMO_CONVERTED_LEN, "%d", singleSample);
+    }
+  }
+

   ctimer_set(&batmon_timer, next, get_batmon_reading, NULL);
 }
 /*---------------------------------------------------------------------------*/
@@ -825,6 +845,7 @@ init_sensors(void)

   list_add(sensor_list, &batmon_temp_reading);
   list_add(sensor_list, &batmon_volt_reading);
+  list_add(sensor_list, &adc_dio23_reading);
   SENSORS_ACTIVATE(batmon_sensor);

 #if BOARD_SENSORTAG
@@ -864,6 +885,7 @@ PROCESS_THREAD(cc26xx_web_demo_process, ev, data)

   /* Start all other (enabled) processes first */
   process_start(&httpd_simple_process, NULL);
+  process_start(&adc_process, NULL);
 #if CC26XX_WEB_DEMO_COAP_SERVER
   process_start(&coap_server_process, NULL);
 #endif
@@ -966,6 +988,56 @@ PROCESS_THREAD(cc26xx_web_demo_process, ev, data)

   PROCESS_END();
 }
+
+PROCESS_THREAD(adc_process, ev, data)
+{
+  PROCESS_BEGIN();
+  static struct etimer et_adc;
+  while(1)
+  {
+         etimer_set(&et_adc, CLOCK_SECOND*5);
+         PROCESS_WAIT_EVENT();
+         if(etimer_expired(&et_adc)) {
+               //intialisation of ADC
+               ti_lib_aon_wuc_aux_wakeup_event(AONWUC_AUX_WAKEUP);
+               while(!(ti_lib_aon_wuc_power_status_get() & AONWUC_AUX_POWER_ON))
+               { }
+
+               // Enable clock for ADC digital and analog interface (not currently enabled in driver)
+               // Enable clocks
+               ti_lib_aux_wuc_clock_enable(AUX_WUC_ADI_CLOCK | AUX_WUC_ANAIF_CLOCK | AUX_WUC_SMPH_CLOCK);
+               while(ti_lib_aux_wuc_clock_status(AUX_WUC_ADI_CLOCK | AUX_WUC_ANAIF_CLOCK | AUX_WUC_SMPH_CLOCK) != AUX_WUC_CLOCK_READY)
+               { }
+               //printf("clock selected\r\n");
+
+               // Connect AUX IO7 (DIO23, but also DP2 on XDS110) as analog input.
+               AUXADCSelectInput(ADC_COMPB_IN_AUXIO7);
+               //printf("input selected\r\n");
+
+               // Set up ADC range
+               // AUXADC_REF_FIXED = nominally 4.3 V
+               AUXADCEnableSync(AUXADC_REF_FIXED,  AUXADC_SAMPLE_TIME_2P7_US, AUXADC_TRIGGER_MANUAL);
+               //printf("init adc --- OK\r\n");
+
+               //Trigger ADC converting
+               AUXADCGenManualTrigger();
+               //printf("trigger --- OK\r\n");
+
+               //reading adc value
+               singleSample = AUXADCReadFifo();
+
+               printf("%d mv on ADC\r\n",singleSample);
+
+               //shut the adc down
+               AUXADCDisable();
+               //printf("disable --- OK\r\n");
+               get_batmon_reading(NULL);
+
+               etimer_reset(&et_adc);
+               }
+  }
+  PROCESS_END();
+}

 

2./examples/cc26xx/cc26xx-web-demo/cc26xx-web-demo.h
@@ -146,6 +146,7 @@
 #define CC26XX_WEB_DEMO_SENSOR_MPU_GYRO_X    12
 #define CC26XX_WEB_DEMO_SENSOR_MPU_GYRO_Y    13
 #define CC26XX_WEB_DEMO_SENSOR_MPU_GYRO_Z    14
+#define CC26XX_WEB_DEMO_SENSOR_ADC_DIO23     15
 /*---------------------------------------------------------------------------*/
 extern process_event_t cc26xx_web_demo_publish_event;
 extern process_event_t cc26xx_web_demo_config_loaded_event;

3. /examples/cc26xx/cc26xx-web-demo/coap-server.c
@@ -50,6 +50,7 @@ extern resource_t res_leds;

 extern resource_t res_batmon_temp;
 extern resource_t res_batmon_volt;
+extern resource_t res_adc_dio23;

 extern resource_t res_device_sw;
 extern resource_t res_device_hw;
@@ -133,6 +134,7 @@ PROCESS_THREAD(coap_server_process, ev, data)

   rest_activate_resource(&res_batmon_temp, "sen/batmon/temp");
   rest_activate_resource(&res_batmon_volt, "sen/batmon/voltage");
+  rest_activate_resource(&res_adc_dio23, "adc/dio23");

   rest_activate_resource(&res_device_hw, "dev/mdl/hw");
   rest_activate_resource(&res_device_sw, "dev/mdl/sw");

4. examples/cc26xx/cc26xx-web-demo/resources/res-sensors.c
@@ -111,12 +111,24 @@ res_get_handler_batmon_volt(void *request, void *response, uint8_t *buffer,
                       buffer, preferred_size, offset);
 }
 /*---------------------------------------------------------------------------*/
+static void
+res_get_handler_adc_dio23(void *request, void *response, uint8_t *buffer,
+                            uint16_t preferred_size, int32_t *offset)
+{
+  res_get_handler_all(CC26XX_WEB_DEMO_SENSOR_ADC_DIO23, request, response,
+                      buffer, preferred_size, offset);
+}
+/*---------------------------------------------------------------------------*/

 RESOURCE(res_batmon_temp, "title=\"Battery Temp\";rt=\"C\"",
          res_get_handler_batmon_temp, NULL, NULL, NULL);
 /*---------------------------------------------------------------------------*/
 RESOURCE(res_batmon_volt, "title=\"Battery Voltage\";rt=\"mV\"",
          res_get_handler_batmon_volt, NULL, NULL, NULL);
 /*---------------------------------------------------------------------------*/
+/*---------------------------------------------------------------------------*/
+RESOURCE(res_adc_dio23, "title=\"ADC DIO23\";rt=\"mV\"",
+         res_get_handler_adc_dio23, NULL, NULL, NULL);
+/*---------------------------------------------------------------------------*/

 #if BOARD_SENSORTAG
 /*---------------------------------------------------------------------------*/
 /* MPU resources and handler: Accelerometer and Gyro */

Build cc26xx-web-demo for CC2650 LaunchPad by "make TARGET=srf06-cc26xx BOARD=launchpad/cc2650 cc26xx-web-demo.bin" and download cc26xx-web-demo.bin to your CC2650 LaunchPad. Let it join 6lbr and you should see resource adc/dio23 on COAP interface. You can press Get button to get the ADC reading from DIO23. Try to connect different voltage (0-3.6V) to test.