From d4c980ca86e49c1dd00e991935d7f6dccb695584 Mon Sep 17 00:00:00 2001
From: Gordon Williams <gw@pur3.co.uk>
Date: Thu, 4 Aug 2016 17:44:34 +0100
Subject: [PATCH] unsuccessful tweaks to use IRQs for BLE TX

---
 libs/bluetooth/jswrap_bluetooth.c | 38 ++++++++++++++++++++++++++++---
 targets/nrf5x/jshardware.c        |  9 --------
 2 files changed, 35 insertions(+), 12 deletions(-)

diff --git a/libs/bluetooth/jswrap_bluetooth.c b/libs/bluetooth/jswrap_bluetooth.c
index 2a56f638c..c0af7f98f 100644
--- a/libs/bluetooth/jswrap_bluetooth.c
+++ b/libs/bluetooth/jswrap_bluetooth.c
@@ -134,7 +134,7 @@ bool jswrap_nrf_transmit_string();
   "generate" : "jswrap_nrf_idle"
 }*/
 bool jswrap_nrf_idle() {
-  return jswrap_nrf_transmit_string()>0; // return true if we sent anything
+  return false;
 }
 
 /*JSON{
@@ -439,7 +439,36 @@ bool jswrap_nrf_transmit_string() {
   }
   return idx>0;
 }
-/**@snippet [Handling the data received over BLE] */
+
+uint32_t radio_notification_init(uint32_t irq_priority, uint8_t notification_type, uint8_t notification_distance)
+{
+    uint32_t err_code;
+
+    err_code = sd_nvic_ClearPendingIRQ(SWI1_IRQn);
+    if (err_code != NRF_SUCCESS)
+    {
+        return err_code;
+    }
+
+    err_code = sd_nvic_SetPriority(SWI1_IRQn, irq_priority);
+    if (err_code != NRF_SUCCESS)
+    {
+        return err_code;
+    }
+
+    err_code = sd_nvic_EnableIRQ(SWI1_IRQn);
+    if (err_code != NRF_SUCCESS)
+    {
+        return err_code;
+    }
+
+    // Configure the event
+    return sd_radio_notification_cfg_set(notification_type, notification_distance);
+}
+
+void SWI1_IRQHandler(bool radio_evt) {
+  jswrap_nrf_transmit_string();
+}
 
 
 /**@brief Function for initializing services that will be used by the application.
@@ -693,7 +722,6 @@ static void on_ble_evt(ble_evt_t * p_ble_evt)
       case BLE_EVT_TX_COMPLETE:
         // UART Transmit finished - we can try and send more data
         bleStatus &= ~BLE_IS_SENDING;
-        jswrap_nrf_transmit_string();
         break;
 
       case BLE_GAP_EVT_ADV_REPORT: {
@@ -1047,6 +1075,10 @@ void jswrap_nrf_bluetooth_init(void) {
   conn_params_init();
 
   jswrap_nrf_bluetooth_wake();
+
+  radio_notification_init(3,
+                          NRF_RADIO_NOTIFICATION_TYPE_INT_ON_INACTIVE,
+                          NRF_RADIO_NOTIFICATION_DISTANCE_5500US);
 }
 
 /*JSON{
diff --git a/targets/nrf5x/jshardware.c b/targets/nrf5x/jshardware.c
index 47b9c6078..070b746de 100644
--- a/targets/nrf5x/jshardware.c
+++ b/targets/nrf5x/jshardware.c
@@ -680,15 +680,6 @@ void jshUSARTSetup(IOEventFlags device, JshUSARTInfo *inf) {
 
 /** Kick a device into action (if required). For instance we may need to set up interrupts */
 void jshUSARTKick(IOEventFlags device) {
-
-  if (device == EV_BLUETOOTH) {
-    /* For bluetooth, start transmit after one character.
-      The BLE_EVT_TX_COMPLETE event will get triggered and
-      will auto-reload whatever needs sending. */
-    bool jswrap_nrf_transmit_string();
-    jswrap_nrf_transmit_string();
-  }
-  
   if (device == EV_SERIAL1) {
     if (uartInitialised) {
       if (!uartIsSending) {