promblem about GPS rx buffer libuartes

[Pham Tam]

Hi,
I'm developing an application using Libuartes to handle GPS data
1. According my knowledge about Libuartes, It will call the NRF_LIBUARTE_ASYNC_EVT_RX_DATA when the buffer is full (or the incoming data has "\r","\n" to indicate TX buffer was completed (please confirm this point for me.)

2.  But in fact, when I test with my terminal (Hercules), I send every string to my nrf then the NRF_LIBUARTE_ASYNC_EVT_RX_DATA event was call and RX buffer receive exactly what I sent (even the size of buffer I have sent is not equal with RX buffer and no  "\r""\n").
When I test with my GPS module. the NRF_LIBUARTE_ASYNC_EVT_RX_DATA was called when my RX buffer is full (but when I connect with my GPS with Hercules) GPS data has "\r"\n" at the last every data.
Ex:
a.  When I connect GPS directly with Hercules : every 1s I receive data one by one
"12345"
after 1s
"12345"
after 1s 
"12345"
b. When I connect GPS directly with NRF with Libuartes RX buffer configuration : 15
I wait 3s to received the whole data like above at 1 time. I need every 1s my debug will show "12345" not after 3s I receive 
"12345"
"12345" 
"12345" 

So what is the difference in here ?. The way of NRF handle RX data from incoming data (I send text by Hercules) and (GPS) not is the same  

[Pham Tam]

Hi I think I found the reason 

1. I use 2 libuarte with configurations
NRF_LIBUARTE_ASYNC_DEFINE(libuarte, 0, 1, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);
NRF_LIBUARTE_ASYNC_DEFINE(libuarte2, 1, 2, 3, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);

libuarte2 used to communicate with GPS and it get this problem

but I convert the libuarte configuration into ibuarte2, libuarte2 can receive data realtime

NRF_LIBUARTE_ASYNC_DEFINE(libuarte, 0, 2, 3, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);
NRF_LIBUARTE_ASYNC_DEFINE(libuarte2, 1, 1, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);

But I got the same  problem in libuarte. (It only call event NRF_LIBUARTE_ASYNC_EVT_RX_DATA when the buffer RX full). I apply these configuration for libuarte example and I got the same problem.

 nrf_libuarte_async_config_t nrf_libuarte_async_config = {
            .tx_pin     = TX_PIN_NUMBER1,
            .rx_pin     = RX_PIN_NUMBER1,
            .baudrate   = NRF_UARTE_BAUDRATE_115200,
            .parity     = NRF_UARTE_PARITY_EXCLUDED,
            .hwfc       = NRF_UARTE_HWFC_DISABLED,
            .timeout_us = 100,
            .int_prio   = APP_IRQ_PRIORITY_LOW_MID 

I don't know why when I change RTC and Timer 1,2 into 2,3 => I need to set  .int_prio = APP_IRQ_PRIORITY_LOW_MID. 

[ovrebekk]

Hi 

If you set _timer1_idx to NRF_LIBUARTE_PERIPHERAL_NOT_USED (the 5th parameter) then the timeout functionality will not be used, and the _rtc1_idx parameter will be ignored. 

In other words you need to provide a second timer to the interface in order to use timeout. 

Could you try this and see if it works better for the GPS sensor?

Best regards
Torbjørn

[Pham Tam]

During the time that I wait for response I set the 

NRF_LIBUARTE_ASYNC_DEFINE(libuarte, 0, 1, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);
NRF_LIBUARTE_ASYNC_DEFINE(libuarte2, 1, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3); 

And it work. But I dont understand clearly about that !

1. I find that when I set (the 5th parameters) is "1" or "3" I will got this problem ? so Why ?

2. And why I need to use NRF_LIBUARTE_PERIPHERAL_NOT_USED (app_timer) ? How it different from my mistake ?

ovrebekk said:

If you set _timer1_idx to NRF_LIBUARTE_PERIPHERAL_NOT_USED (the 5th parameter) then the timeout functionality will not be used, and the _rtc1_idx parameter will be ignored. 

Can you explain for me more clearly ?
I'm have many confusion about rtc and timer and NRF_LIBUARTE_PERIPHERAL_NOT_USED in libuartes.

Please give me as much information as possible, because waiting for reply is very long.

Thank you very much ! 

[ovrebekk]

Hi

It's important to be aware that when you are using the SoftDevice and app_timer modules only RTC2 is available for the application, or for the LIBUARTE module. The reason for this is that there are only three RTC modules in the nRF52 devices, and RTC0 is used by the SoftDevice while RTC1 is used by the app_timer. 

In terms of timers you have 5 in total, and only TIMER0 is used by the SoftDevice, so you should be able to use timers 1, 2, 3 and 4 for LIBUARTE. 

Your configuration works because you only use RTC2, TIMER1 and TIMER2, which means there is no conflict between peripherals. 

Pham Tam said:

1. I find that when I set (the 5th parameters) is "1" or "3" I will got this problem ? so Why ?

It is hard to say why this problem occurs. If you have set the timeout to 100us, then the libuarte driver should trigger the NRF_LIBUARTE_ASYNC_EVT_RX_DATA event approximately 100us after the last byte was received from the GPS module, and you should not need to wait for the buffer to fill up. 

Would you be able to share the source code for the code that configures and uses the libuarte driver when you get this issue so I can have a look at it? 

If you don't want to share your code in a public case just let me know, and I can make the case private. 

Best regards
Torbjørn

[Pham Tam]

Fullscreen main (2).txt Download

#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "ble_hci.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "app_timer.h"
#include "ble_nus.h"
#include "app_util_platform.h"
#include "bsp_btn_ble.h"
#include "nrf_pwr_mgmt.h"
#include "app_error.h"
#include "bsp.h"
#include "app_pwm.h"

#include "nrf_libuarte_async.h"

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_delay.h"
#include "nrf_gpio.h"


#define Button 18

#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */

// #define DEVICE_NAME                     "xFinder"                               /**< Name of device. Will be included in the advertising data. */
#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */

#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */

#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */

//#define APP_ADV_DURATION                6000                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
#define APP_ADV_DURATION 0

#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS)    /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS)    /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0                                      /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)     /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3                       /**< Number of attempts before giving up the connection parameter negotiation. */

#define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */

NRF_LIBUARTE_ASYNC_DEFINE(libuarte, 0, 1, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED,255, 3);
NRF_LIBUARTE_ASYNC_DEFINE(libuarte2, 1, 2, NRF_LIBUARTE_PERIPHERAL_NOT_USED, NRF_LIBUARTE_PERIPHERAL_NOT_USED, 255, 3);

BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT); /**< BLE NUS service instance. */
NRF_BLE_GATT_DEF(m_gatt);                  /**< GATT module instance. */
NRF_BLE_QWR_DEF(m_qwr);             /**< Context for the Queued Write module.*/
BLE_ADVERTISING_DEF(m_advertising); /**< Advertising module instance. */


bool checkPreviousBufferFull = false;
bool checkCurrentBufferFull = false;
uint8_t tempBuffer[100];

uint8_t GPS_RMC[] ="$PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29<CR><LF>";
uint8_t GPS_timeInterval[] ="$PMTK220,2000*1C<CR><LF>";

uint8_t coordinate[30];
uint8_t dataGPS[180];
char longitude[30];
char latitude[30];
uint8_t valuePWM = 0;
bool checkRec2 = false;
char valueText[50];

APP_PWM_INSTANCE(PWM1, 3);

bool checkBuzzer = false;
static volatile bool ready_flag; // A flag indicating PWM status.

void pwm_ready_callback(uint32_t pwm_id) // PWM callback function
{
  ready_flag = true;
}

static uint16_t m_conn_handle =
    BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
static uint16_t m_ble_nus_max_data_len =
    BLE_GATT_ATT_MTU_DEFAULT - 3; /**< Maximum length of data (in bytes) that
                                     can be transmitted to the peer by the
                                     Nordic UART service module. */
static ble_uuid_t m_adv_uuids[] =
    /**< Universally unique service identifier. */ {
        {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};

/**@brief Function for assert macro callback.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product.
 * You need to analyse
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in] line_num    Line number of the failing ASSERT call.
 * @param[in] p_file_name File name of the failing ASSERT call.
 */
void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name) {
  NRF_LOG_INFO("call assert_nrf_callback");
  app_error_handler(DEAD_BEEF, line_num, p_file_name);
}

/**@brief Function for initializing the timer module.
 */
static void timers_init(void) {
  ret_code_t err_code = app_timer_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for the GAP initialization.
 *
 * @details This function will set up all the necessary GAP (Generic Access
 * Profile) parameters of
 *          the device. It also sets the permissions and appearance.
 */
static void gap_params_init(void) {
  uint32_t err_code;
  ble_gap_conn_params_t gap_conn_params;
  ble_gap_conn_sec_mode_t sec_mode;
  char DEVICE_NAME[25];

  ble_gap_addr_t addr;
  sd_ble_gap_addr_get(&addr);
  NRF_LOG_RAW_INFO("\n%02X:%02X:%02X:%02X:%02X:%02X\n", addr.addr[0],
                   addr.addr[1], addr.addr[2], addr.addr[3], addr.addr[4],
                   addr.addr[5]);
  sprintf(DEVICE_NAME, "xFinder:%02X:%02X:%02X:%02X:%02X:%02X", addr.addr[5],
          addr.addr[4], addr.addr[3], addr.addr[2], addr.addr[1], addr.addr[0]);

  BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

  err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME,
                                        strlen(DEVICE_NAME));
  APP_ERROR_CHECK(err_code);

  memset(&gap_conn_params, 0, sizeof(gap_conn_params));

  gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
  gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
  gap_conn_params.slave_latency = SLAVE_LATENCY;
  gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

  err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling Queued Write Module errors.
 *
 * @details A pointer to this function will be passed to each service which may
 * need to inform the
 *          application about an error.
 *
 * @param[in]   nrf_error   Error code containing information about what went
 * wrong.
 */
static void nrf_qwr_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

/**@brief Function for handling the data from the Nordic UART Service.
 *
 * @details This function will process the data received from the Nordic UART
 * BLE Service and send
 *          it to the UART module.
 *
 * @param[in] p_evt       Nordic UART Service event.
 */
/**@snippet [Handling the data received over BLE] */
static void nus_data_handler(ble_nus_evt_t *p_evt) {
  ret_code_t ret;

  uint16_t index = 0;

  if (p_evt->type == BLE_NUS_EVT_RX_DATA) {
    uint32_t err_code;
    NRF_LOG_INFO("receieved data from mobile phone");
    NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
    NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data,
                          p_evt->params.rx_data.length);
    NRF_LOG_INFO("%s", p_evt->params.rx_data.p_data);

    uint8_t uart_string[BLE_NUS_MAX_DATA_LEN + 2] = "";
    memcpy(uart_string, p_evt->params.rx_data.p_data,
           p_evt->params.rx_data.length);
    uart_string[p_evt->params.rx_data.length] = '\r';
    uart_string[p_evt->params.rx_data.length + 1] = '\n';

    if (strcmp(uart_string, "1\r\n") == 0) {
      checkBuzzer = true;
    }
    if (strcmp(uart_string, "2\r\n") == 0) {
      checkBuzzer = false;
    }
    do {
      err_code = nrf_libuarte_async_tx(&libuarte, uart_string,
                                       p_evt->params.rx_data.length + 2);
      if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY)) {
        NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
        APP_ERROR_CHECK(err_code);
      }
    } while (err_code == NRF_ERROR_BUSY);
  }
}
/**@snippet [Handling the data received over BLE] */

/**@brief Function for initializing services that will be used by the
 * application.
 */
static void services_init(void) {
  NRF_LOG_INFO("call services_init");
  uint32_t err_code;
  ble_nus_init_t nus_init;
  nrf_ble_qwr_init_t qwr_init = {0};

  // Initialize Queued Write Module.
  qwr_init.error_handler = nrf_qwr_error_handler;

  err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
  APP_ERROR_CHECK(err_code);

  // Initialize NUS.
  memset(&nus_init, 0, sizeof(nus_init));

  nus_init.data_handler = nus_data_handler;

  err_code = ble_nus_init(&m_nus, &nus_init);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling an event from the Connection Parameters Module.
 *
 * @details This function will be called for all events in the Connection
 * Parameters Module
 *          which are passed to the application.
 *
 * @note All this function does is to disconnect. This could have been done by
 * simply setting
 *       the disconnect_on_fail config parameter, but instead we use the event
 * handler
 *       mechanism to demonstrate its use.
 *
 * @param[in] p_evt  Event received from the Connection Parameters Module.
 */
static void on_conn_params_evt(ble_conn_params_evt_t *p_evt) {
  NRF_LOG_INFO("call on_conn_params_evt");
  uint32_t err_code;

  if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED) {
    err_code = sd_ble_gap_disconnect(m_conn_handle,
                                     BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
    APP_ERROR_CHECK(err_code);
  }
}

/**@brief Function for handling errors from the Connection Parameters module.
 *
 * @param[in] nrf_error  Error code containing information about what went
 * wrong.
 */
static void conn_params_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

/**@brief Function for initializing the Connection Parameters module.
 */
static void conn_params_init(void) {
  uint32_t err_code;
  ble_conn_params_init_t cp_init;

  memset(&cp_init, 0, sizeof(cp_init));

  cp_init.p_conn_params = NULL;
  cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
  cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
  cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
  cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
  cp_init.disconnect_on_fail = false;
  cp_init.evt_handler = on_conn_params_evt;
  cp_init.error_handler = conn_params_error_handler;

  err_code = ble_conn_params_init(&cp_init);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for putting the chip into sleep mode.
 *
 * @note This function will not return.
 */
static void sleep_mode_enter(void) {
  NRF_LOG_INFO("call slepp_mode_enter");
  uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  // Prepare wakeup buttons.
  err_code = bsp_btn_ble_sleep_mode_prepare();
  APP_ERROR_CHECK(err_code);

  // Go to system-off mode (this function will not return; wakeup will cause a
  // reset).
  err_code = sd_power_system_off();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling advertising events.
 *
 * @details This function will be called for advertising events which are passed
 * to the application.
 *
 * @param[in] ble_adv_evt  Advertising event.
 */
static void on_adv_evt(ble_adv_evt_t ble_adv_evt) {
  uint32_t err_code;
  NRF_LOG_INFO("call on_adv_evt");
  switch (ble_adv_evt) {
  case BLE_ADV_EVT_FAST:
    NRF_LOG_INFO("call BLE_ADV_EVT_FAST");
    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
    break;
  case BLE_ADV_EVT_IDLE:
    NRF_LOG_INFO("call BLE_ADV_EVT_IDLE");
    // sleep_mode_enter();
    break;
  default:
    break;
  }
}

/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void ble_evt_handler(ble_evt_t const *p_ble_evt, void *p_context) {
  uint32_t err_code;

  switch (p_ble_evt->header.evt_id) {
  case BLE_GAP_EVT_CONNECTED:
    NRF_LOG_INFO("Connected");
    err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    APP_ERROR_CHECK(err_code);
    m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GAP_EVT_DISCONNECTED:
    NRF_LOG_INFO("Disconnected");
    // LED indication will be changed when advertising starts.
    m_conn_handle = BLE_CONN_HANDLE_INVALID;
    break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys = {
        .rx_phys = BLE_GAP_PHY_AUTO, .tx_phys = BLE_GAP_PHY_AUTO,
    };
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
    // Pairing not supported
    err_code = sd_ble_gap_sec_params_reply(
        m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_SYS_ATTR_MISSING:
    // No system attributes have been stored.
    err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
                                     BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
                                     BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;
  case BSP_EVENT_KEY_0:
    NRF_LOG_INFO("DA BAM NUT");
    break;

  default:
    // No implementation needed.
    break;
  }
}

/**@brief Function for the SoftDevice initialization.
 *
 * @details This function initializes the SoftDevice and the BLE event
 * interrupt.
 */
static void ble_stack_init(void) {
  NRF_LOG_INFO("call ble_stack_init");
  ret_code_t err_code;

  err_code = nrf_sdh_enable_request();
  APP_ERROR_CHECK(err_code);

  // Configure the BLE stack using the default settings.
  // Fetch the start address of the application RAM.
  uint32_t ram_start = 0;
  err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
  APP_ERROR_CHECK(err_code);

  // Enable BLE stack.
  err_code = nrf_sdh_ble_enable(&ram_start);
  APP_ERROR_CHECK(err_code);

  // Register a handler for BLE events.
  NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler,
                       NULL);
}

/**@brief Function for handling events from the GATT library. */
void gatt_evt_handler(nrf_ble_gatt_t *p_gatt, nrf_ble_gatt_evt_t const *p_evt) {
  if ((m_conn_handle == p_evt->conn_handle) &&
      (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)) {
    m_ble_nus_max_data_len =
        p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
    NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len,
                 m_ble_nus_max_data_len);
  }
  NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
                p_gatt->att_mtu_desired_central,
                p_gatt->att_mtu_desired_periph);
}

/**@brief Function for initializing the GATT library. */
void gatt_init(void) {
  ret_code_t err_code;

  err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
  APP_ERROR_CHECK(err_code);

  err_code =
      nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated by button press.
 */
void bsp_event_handler(bsp_event_t event) {
  uint32_t err_code;
  switch (event) {
  case BSP_EVENT_KEY_0:
    NRF_LOG_INFO("BSP_EVENT_KEY_0");
    // sleep_mode_enter();
    break;
  default:
    break;
  }
}

char *datavalue(char Data[], char characters, int num) {
  memset(valueText,0,sizeof(valueText));
  int found = 0;
  int strIndex[] = {0, -1};
  int maxIndex = strlen(Data) - 1;
  for (int i = 0; i <= maxIndex && found <= num; i++) {
    if (Data[i] == characters || i == maxIndex) {
      found++;
      strIndex[0] = strIndex[1] + 1;
      strIndex[1] = (i == maxIndex) ? i + 1 : i;
    }
  }
  if (found > num) {
    strncpy(valueText, Data + strIndex[0], strIndex[1] - strIndex[0]);
  } else
    strcpy(valueText, "");
  return valueText;
}

typedef struct {
  uint8_t *p_data;
  uint32_t length;
} buffer_t;

NRF_QUEUE_DEF(buffer_t, m_buf_queue, 10, NRF_QUEUE_MODE_NO_OVERFLOW);

void send_Uart1(char *sdata, int len) {
  ret_code_t ret;
  do {
    ret = nrf_libuarte_async_tx(&libuarte, sdata, len);
  } while (ret == NRF_ERROR_BUSY);
  APP_ERROR_CHECK(ret);
}

void send_Uart2(char *sdata, int len) {
  ret_code_t ret;
  do {
    ret = nrf_libuarte_async_tx(&libuarte2, sdata, len);
  } while (ret == NRF_ERROR_BUSY);
  APP_ERROR_CHECK(ret);
}

void handleBuffer() {
  if (checkPreviousBufferFull == true) {
    NRF_LOG_INFO("call handleBuffer");
    strcat(dataGPS, tempBuffer);
  } else {
    memset(dataGPS, 0, sizeof(dataGPS));
    memcpy(dataGPS, tempBuffer, sizeof(tempBuffer));
  }

  if (checkCurrentBufferFull == false) {
    //NRF_LOG_INFO("data = %s", dataGPS);
    stpcpy(longitude, datavalue(dataGPS, ',', 1));
    strcpy(latitude, datavalue(dataGPS, ',', 9));
    NRF_LOG_INFO("%s",longitude);
    NRF_LOG_INFO("%s",latitude);
    sprintf(coordinate, "%s;%s\r\n", longitude, latitude);
    send_Uart1(coordinate, sizeof(coordinate)); 
  }
  checkPreviousBufferFull = checkCurrentBufferFull;
  memset(tempBuffer, 0, sizeof(tempBuffer));
}

/**@brief   Function for handling app_uart events.
 *
 * @details This function will receive a single character from the app_uart
 * module and append it to
 *          a string. The string will be be sent over BLE when the last
 * character received was a
 *          'new line' '\n' (hex 0x0A) or if the string has reached the maximum
 * data length.
 */
/**@snippet [Handling the data received over UART] */

void uart_event_handler(void *context, nrf_libuarte_async_evt_t *p_evt) {
  nrf_libuarte_async_t *p_libuarte = (nrf_libuarte_async_t *)context;
  ret_code_t ret;
  uint16_t index = 0;
  switch (p_evt->type) {
  case NRF_LIBUARTE_ASYNC_EVT_OVERRUN_ERROR:
    break;
  case NRF_LIBUARTE_ASYNC_EVT_ERROR:
    break;
  case NRF_LIBUARTE_ASYNC_EVT_RX_DATA:
    //checkRec2 = true;
    //memcpy(tempBuffer, p_evt->data.rxtx.p_data, p_evt->data.rxtx.length);
    //if (p_evt->data.rxtx.src == 0) {
    //  NRF_LOG_INFO("XX FULL BUFFER XX");
    //  checkCurrentBufferFull = true;
    //} else {
    //  checkCurrentBufferFull = false;
    //}
    NRF_LOG_INFO("receive1");
    nrf_libuarte_async_rx_free(p_libuarte, p_evt->data.rxtx.p_data,
                               p_evt->data.rxtx.length);

    break;
  case NRF_LIBUARTE_ASYNC_EVT_TX_DONE:
    memset(coordinate,0, sizeof(coordinate));
    memset(longitude,0,sizeof(longitude));
    memset(latitude,0,sizeof(latitude));
    break;
  default:
    break;
  }
}

uint8_t data1[100];
uint8_t data2[100];
char *ptrRx2;

void uart_event_handler2(void *context, nrf_libuarte_async_evt_t *p_evt) {
  nrf_libuarte_async_t *p_libuarte = (nrf_libuarte_async_t *)context;
  ret_code_t ret;
  uint16_t index = 0;

  switch (p_evt->type) {
  case NRF_LIBUARTE_ASYNC_EVT_ERROR:
    break;
  case NRF_LIBUARTE_ASYNC_EVT_RX_DATA:
    checkRec2 = true;
    memcpy(tempBuffer, p_evt->data.rxtx.p_data, p_evt->data.rxtx.length);
    if (p_evt->data.rxtx.src == 0) {
      checkCurrentBufferFull = true;
    } else {
      checkCurrentBufferFull = false;
    }
    nrf_libuarte_async_rx_free(p_libuarte, p_evt->data.rxtx.p_data, p_evt->data.rxtx.length);
    break;
  case NRF_LIBUARTE_ASYNC_EVT_TX_DONE:
    break;
  default:
    break;
  }
}
/**@snippet [Handling the data received over UART] */

/**@brief  Function for initializing the UART module.
 */
/**@snippet [UART Initialization] */
static void uart1_init(void) {
  uint32_t err_code;
  nrf_libuarte_async_config_t nrf_libuarte_async_config = {
      .tx_pin = TX_PIN_NUMBER1,
      .rx_pin = RX_PIN_NUMBER1,
      .baudrate = NRF_UARTE_BAUDRATE_115200,
      .parity = NRF_UARTE_PARITY_EXCLUDED,
      .hwfc = NRF_UARTE_HWFC_DISABLED,
      .timeout_us = 100,
      .int_prio = APP_IRQ_PRIORITY_LOW_MID};
  
  err_code = nrf_libuarte_async_init(&libuarte, &nrf_libuarte_async_config,
                                     uart_event_handler, (void *)&libuarte);
  APP_ERROR_CHECK(err_code);
  nrf_libuarte_async_enable(&libuarte);
  //static uint8_t text[] = "ble_app_libUARTE example started.\r\n";
  //static uint8_t text_size = sizeof(text);
  //err_code = nrf_libuarte_async_tx(&libuarte, text, text_size);
  APP_ERROR_CHECK(err_code);
}

static void uart2_init(void) {
  uint32_t err_code;
  nrf_libuarte_async_config_t nrf_libuarte_async_config2 = {
      .tx_pin = TX_PIN_NUMBER2,
      .rx_pin = RX_PIN_NUMBER2,
      .baudrate = NRF_UARTE_BAUDRATE_115200,
      .parity = NRF_UARTE_PARITY_EXCLUDED,
      .hwfc = NRF_UARTE_HWFC_DISABLED,
      .timeout_us = 100,
      .int_prio = APP_IRQ_PRIORITY_LOW_MID};
  ret_code_t err_code2 =
      nrf_libuarte_async_init(&libuarte2, &nrf_libuarte_async_config2,
                              uart_event_handler2, (void *)&libuarte2);
  APP_ERROR_CHECK(err_code2);
  nrf_libuarte_async_enable(&libuarte2);
  //static uint8_t text[] = "ble_app_libUARTE example started.\r\n";
  //static uint8_t text_size = sizeof(text);
  //err_code2 = nrf_libuarte_async_tx(&libuarte2, text, text_size);
  APP_ERROR_CHECK(err_code2);
}

/**@snippet [UART Initialization] */

/**@brief Function for initializing the Advertising functionality.
 */
static void advertising_init(void) {
  uint32_t err_code;
  ble_advertising_init_t init;

  memset(&init, 0, sizeof(init));

  init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
  init.advdata.include_appearance = false;
  // init.advdata.flags              =
  // BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
  init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
  init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
  init.srdata.uuids_complete.p_uuids = m_adv_uuids;

  init.config.ble_adv_fast_enabled = true;
  init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
  init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
  init.evt_handler = on_adv_evt;

  err_code = ble_advertising_init(&m_advertising, &init);
  APP_ERROR_CHECK(err_code);

  ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}

/**@brief Function for initializing buttons and leds.
 *
 * @param[out] p_erase_bonds  Will be true if the clear bonding button was
 * pressed to wake the application up.
 */
static void buttons_leds_init(bool *p_erase_bonds) {
  bsp_event_t startup_event;

  uint32_t err_code =
      bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_btn_ble_init(NULL, &startup_event);
  APP_ERROR_CHECK(err_code);

  *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}

/**@brief Function for initializing the nrf log module.
 */
static void log_init(void) {
  ret_code_t err_code = NRF_LOG_INIT(NULL);
  APP_ERROR_CHECK(err_code);
  NRF_LOG_DEFAULT_BACKENDS_INIT();
}

/**@brief Function for initializing power management.
 */
static void power_management_init(void) {
  ret_code_t err_code;
  err_code = nrf_pwr_mgmt_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling the idle state (main loop).
 *
 * @details If there is no pending log operation, then sleep until next the next
 * event occurs.
 */
static void idle_state_handle(void) {
  if (NRF_LOG_PROCESS() == false) {
    nrf_pwr_mgmt_run();
  }
}

/**@brief Function for starting advertising.
 */
static void advertising_start(void) {
  NRF_LOG_INFO("call advertising start");
  uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
  APP_ERROR_CHECK(err_code);
}

/**@brief Application main function.
 */

   static void uart_init(void) {
    uint32_t err_code;

    nrf_libuarte_async_config_t nrf_libuarte_async_config = {
      .tx_pin = TX_PIN_NUMBER1,
      .rx_pin = RX_PIN_NUMBER1,
      .baudrate = NRF_UARTE_BAUDRATE_115200,
      .parity = NRF_UARTE_PARITY_EXCLUDED,
      .hwfc = NRF_UARTE_HWFC_DISABLED,
      .timeout_us = 100,
      .int_prio = APP_IRQ_PRIORITY_LOW_MID
    };
    nrf_libuarte_async_config_t nrf_libuarte_async_config2 = {
      .tx_pin = TX_PIN_NUMBER2,
      .rx_pin = RX_PIN_NUMBER2,
      .baudrate = NRF_UARTE_BAUDRATE_115200,
      .parity = NRF_UARTE_PARITY_EXCLUDED,
      .hwfc = NRF_UARTE_HWFC_DISABLED,
      .timeout_us = 100,
      .int_prio = APP_IRQ_PRIORITY_LOW_MID
    };

    err_code = nrf_libuarte_async_init( & libuarte, & nrf_libuarte_async_config, uart_event_handler, (void * ) & libuarte);
    ret_code_t err_code2 = nrf_libuarte_async_init( & libuarte2, & nrf_libuarte_async_config2, uart_event_handler2, (void * ) & libuarte2); //edited2

    APP_ERROR_CHECK(err_code);
    APP_ERROR_CHECK(err_code2); //edited2

    nrf_libuarte_async_enable( & libuarte);
    nrf_libuarte_async_enable( & libuarte2); //edited2

    static uint8_t text[] = "ble_app_libUARTE example started.\r\n";
    static uint8_t text_size = sizeof(text);

    err_code = nrf_libuarte_async_tx( & libuarte, text, text_size);
    err_code2 = nrf_libuarte_async_tx( & libuarte2, text, text_size); //edited2
    APP_ERROR_CHECK(err_code);
    APP_ERROR_CHECK(err_code2); //edited2
  }

bool checkConfig = true;

int main(void)

{
  bool erase_bonds;
  log_init();
  // Initialize.
  timers_init();
  //uart2_init();
  uart_init();
  checkConfig = true;
  NRF_LOG_INFO("1===");
  send_Uart2(GPS_RMC, sizeof(GPS_RMC));
  NRF_LOG_INFO("2===");
  send_Uart2(GPS_RMC, sizeof(GPS_RMC));
  NRF_LOG_INFO("3===");
  send_Uart2(GPS_timeInterval, sizeof(GPS_timeInterval));
  NRF_LOG_INFO("4===");
  send_Uart2(GPS_timeInterval, sizeof(GPS_timeInterval));
  NRF_LOG_INFO("5===");
  checkConfig = false;
  //uart1_init();

  buttons_leds_init(&erase_bonds);
  power_management_init();
  ble_stack_init();
  gap_params_init();
  gatt_init();
  services_init();
  advertising_init();
  conn_params_init();
  // Start execution.
  NRF_LOG_INFO("Debug logging for UART over RTT started.");
  advertising_start();

  ret_code_t err_code;
  app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_1CH(500, LED_2);
  pwm1_cfg.pin_polarity[1] = APP_PWM_POLARITY_ACTIVE_HIGH;
  err_code = app_pwm_init(&PWM1, &pwm1_cfg, pwm_ready_callback);
  APP_ERROR_CHECK(err_code);

  app_pwm_enable(&PWM1);

  // Enter main loop.
  for (;;) {
    idle_state_handle();

    if (checkRec2 && checkConfig == false) {
      handleBuffer();
      checkRec2 = false;
    }

    while (checkBuzzer == true) {
    //app_pwm_channel_duty_set(&PWM1, 0, 50);
    //nrf_delay_ms(25);
    //app_pwm_channel_duty_set(&PWM1, 0, 100);
    //nrf_delay_ms(25);


      for (uint8_t i = 0; i < 40; ++i) {
        valuePWM = (i < 20) ? (i * 5) : (100 - (i - 20) * 5);
        ready_flag = false;
        while (app_pwm_channel_duty_set(&PWM1, 0, valuePWM) == NRF_ERROR_BUSY);
        while (!ready_flag);
        APP_ERROR_CHECK(app_pwm_channel_duty_set(&PWM1, 0, valuePWM));
        nrf_delay_ms(25);
      }
    }
    if (checkBuzzer == false) {
      while (app_pwm_channel_duty_set(&PWM1, 0, 100) == NRF_ERROR_BUSY);
    }
  }
}

/**
 * @}
 */

015863.sdk_config.h

Hi, ovrebekk here is main.c (using 2 libuarte, ble, pwm)

[ovrebekk]

Hi 

Sorry for the slow response, I just got back from 2 weeks of vacation. 

Are you still having the same issue? 

If so I will set aside some time tomorrow to look into your code. 

Best regards
Torbjørn