Cannot see any data in Serial software from nrf51822?

[nar0909]

enter code hereHi guys I have managed to program an example BLE_Serial program into the nrf51822 but I cannot see anything coming out from the TX and RX ? Please guide me on what I might be doing wrong. I have loaded the s130 v1.0 softdevice and then this sample program using BMProbe. I'm using a real term serial software. baud rate is 9600/no parity/8 bits/1bit- stop bit/none for hardware flow control. Here's the sample program I've used. BLE_Serial.inoWhen I sniff the BLE it's named TXRX. When I connect to the nrf_connect its BLE_Serial.

But I don't see anything coming out from serial port in my computer? Please help on what can be done? nrf51822 - P3 - RXD and P4 - TXD.

Please let me know for any mods that needs to be done over the above program to see any data coming out of serial port in my real term software?

Many thanks naren0909

P.S I have also tried using a logic analyser to see if there's anything but I see nothing. =( Please check the attachments. thx

/*
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 * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 * 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.
 */
#include <BLE_API.h>

#define DEVICE_NAME                       "BLE Serial"
#define TXRX_BUF_LEN                      20

BLE                                       ble;
Timeout                                   timeout;

static uint8_t rx_buf[TXRX_BUF_LEN];
static uint8_t rx_buf_num;
static uint8_t rx_state=0;

// The uuid of service and characteristics
static const uint8_t service1_uuid[]        = {0x71, 0x3D, 0, 0, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
static const uint8_t service1_tx_uuid[]     = {0x71, 0x3D, 0, 3, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
static const uint8_t service1_rx_uuid[]     = {0x71, 0x3D, 0, 2, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
static const uint8_t uart_base_uuid_rev[]   = {0x1E, 0x94, 0x8D, 0xF1, 0x48, 0x31, 0x94, 0xBA, 0x75, 0x4C, 0x3E, 0x50, 0, 0, 0x3D, 0x71};

uint8_t tx_value[TXRX_BUF_LEN] = {0,};
uint8_t rx_value[TXRX_BUF_LEN] = {0,};

// Create characteristic and service
GattCharacteristic  characteristic1(service1_tx_uuid, tx_value, 1, TXRX_BUF_LEN, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE );
GattCharacteristic  characteristic2(service1_rx_uuid, rx_value, 1, TXRX_BUF_LEN, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
GattCharacteristic *uartChars[] = {&characteristic1, &characteristic2};
GattService         uartService(service1_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *));


void disconnectionCallBack(const Gap::DisconnectionCallbackParams_t *params) {
  ble.startAdvertising();
}

void gattServerWriteCallBack(const GattWriteCallbackParams *Handler) {
  uint8_t buf[TXRX_BUF_LEN];
  uint16_t bytesRead, index;

  if (Handler->handle == characteristic1.getValueAttribute().getHandle()) {
    ble.readCharacteristicValue(characteristic1.getValueAttribute().getHandle(), buf, &bytesRead);
    for(index=0; index<bytesRead; index++) {
      Serial.write(buf[index]);
    }
  }
}

void m_uart_rx_handle() {
  //update characteristic data
  ble.updateCharacteristicValue(characteristic2.getValueAttribute().getHandle(), rx_buf, rx_buf_num);
  memset(rx_buf, 0x00,20);
  rx_state = 0;
}

void uart_handle(uint32_t id, SerialIrq event) {
  // Serial rx IRQ
  if(event == RxIrq) {
    if (rx_state == 0) {
      rx_state = 1;
      timeout.attach_us(m_uart_rx_handle, 100000);
      rx_buf_num=0;
    }
    while(Serial.available()) {
      if(rx_buf_num < 20) {
        rx_buf[rx_buf_num] = Serial.read();
        rx_buf_num++;
      }
      else
        Serial.read();
    }
  }
}

void setup() {
  // put your setup code here, to run once
  Serial.begin(9600);
  Serial.attach(uart_handle);

  ble.init();
  ble.onDisconnection(disconnectionCallBack);
  ble.onDataWritten(gattServerWriteCallBack);

  // setup adv_data and srp_data
  ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
  ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
                                   (const uint8_t *)"TXRX", sizeof("TXRX") - 1);
  ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
                                   (const uint8_t *)uart_base_uuid_rev, sizeof(uart_base_uuid_rev));
  // set adv_type
  ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
  // add service
  ble.addService(uartService);
  // set device name
  ble.setDeviceName((const uint8_t *)DEVICE_NAME);
  // set tx power,valid values are -40, -20, -16, -12, -8, -4, 0, 4
  ble.setTxPower(4);
  // set adv_interval, 100ms in multiples of 0.625ms.
  ble.setAdvertisingInterval(160);
  // set adv_timeout, in seconds
  ble.setAdvertisingTimeout(0);
  // start advertising
  ble.startAdvertising();
}

void loop() {
  // put your main code here, to run repeatedly:
  ble.waitForEvent();
}

[RK]

Look at your message - do you think anyone can read that jumble? Please edit the question, use the 'preformatted text' button to format the code so it actually looks readable and then someone may be able to help you.

[nar0909]

Please consider the above question now...I have edited it accordingly. I apologise for the gobbledy gook looking code earlier. =)

[Hung Bui]

@naren: You should try to test if serial working properly or not. Maybe start with smth like this:

  void setup() {
    Serial.begin(9600);

    Serial.println("HelloWorld");
    }
  void loop() {}

Why did you monitor on P3 - RXD and P4 - TXD ? Which board are you testing ? According to this, it should be P09 and P11.

[nar0909]

@Hung Bui Thanks for the reply mate but I have tried a few serial examples but they didn't seem to work for me apparently. I have used an FTDI based mini board with FT232RL micro and it has a TX RX GND VCC (3.3V) and few other pins like RTS TXD RXD 5v and stuff but it should work as it supposed to be as a simple serial interface like sending text to the ble should display data on the serial software. It works fine with the other nrf51822 s110 version I tried but does it make a difference on the s130? And is there anything I'm missing out? Please help Many thx

[nar0909]

Also how could you be specific about the P09 and P11 ?? Because I don't see any code related to the PINS ? And what board does those pins point out to? I've used arduino sketch to upload the application into the nrf51822 using black magic probe ( using roger clarke repos) . The applications work just fine like Central, peripheral and both central/peripheral and collecting HRM value from slave. But I can't see data coming from the TXD & RXD pins from the nrf51822 when I hook up with a logic analyser?