From 7e1557557f1618ec5315981e00f9ed5396100597 Mon Sep 17 00:00:00 2001
From: Miller Puckette <msp@ucsd.edu>
Date: Mon, 12 Jul 2021 13:56:50 -0700
Subject: [PATCH] pd messages back over BT link

---
 main/espd.c   | 34 +++++++++++++++++++++++++++++++---
 main/pdmain.c |  8 ++++----
 2 files changed, 35 insertions(+), 7 deletions(-)

diff --git a/main/espd.c b/main/espd.c
index f60e26e..36bd19c 100644
--- a/main/espd.c
+++ b/main/espd.c
@@ -76,12 +76,15 @@ void senddacs( void)
         ESP_LOGE(TAG, "error writing");
 }
 
+void pd_bt_writeback(const unsigned char *s, int length);
+
 void pdmain_print( const char *s)
 {
     char y[80];
     strncpy(y, s, 79);
     y[79]=0;
     ESP_LOGI(TAG, "%s", y);
+    pd_bt_writeback((unsigned char *)y, strlen(y));
 }
 
 void trymem(int foo);
@@ -137,7 +140,21 @@ void app_main(void)
 
 /* -------------------- bluetooth and SD card ------------------ */
 
-void pd_dispatch_bt(char *data, size_t size);
+void pd_bt_dispatch(char *data, size_t size);
+
+static uint32_t pd_bt_writehandle;
+
+void pd_bt_writeback(const unsigned char *s, int length)
+{
+#if 1
+    if (pd_bt_writehandle)
+    {
+        if (esp_spp_write(pd_bt_writehandle, length, s) != ESP_OK)
+            ESP_LOGI(TAG, "bt writeback error");
+    }
+    else ESP_LOGI(TAG, "writeback: not open");
+#endif
+}
 
 static const esp_spp_mode_t esp_spp_mode = ESP_SPP_MODE_CB;
 static const esp_spp_sec_t sec_mask = ESP_SPP_SEC_AUTHENTICATE;
@@ -159,6 +176,7 @@ static void esp_spp_cb(esp_spp_cb_event_t event, esp_spp_cb_param_t *param)
         ESP_LOGI(TAG, "ESP_SPP_OPEN_EVT");
         break;
     case ESP_SPP_CLOSE_EVT:
+        pd_bt_writehandle = 0;
         ESP_LOGI(TAG, "ESP_SPP_CLOSE_EVT");
         break;
     case ESP_SPP_START_EVT:
@@ -172,8 +190,16 @@ static void esp_spp_cb(esp_spp_cb_event_t event, esp_spp_cb_param_t *param)
         if (param->data_ind.len > 2)
             ESP_LOGI(TAG, "ESP_SPP_DATA_IND_EVT len=%d handle=%d",
                  param->data_ind.len, param->data_ind.handle);
-
-        pd_dispatch_bt((char *)(param->data_ind.data), param->data_ind.len);
+#if 0
+        {
+            char foo[80];
+            int len = (param->data_ind.len > 79 ? 79 : param->data_ind.len);
+            memcpy(foo, param->data_ind.data, len);
+            foo[len] = 0;
+            ESP_LOGI(TAG, "message %s", foo);
+        }
+#endif
+        pd_bt_dispatch((char *)(param->data_ind.data), param->data_ind.len);
 
         break;
     case ESP_SPP_CONG_EVT:
@@ -183,6 +209,8 @@ static void esp_spp_cb(esp_spp_cb_event_t event, esp_spp_cb_param_t *param)
         ESP_LOGI(TAG, "ESP_SPP_WRITE_EVT");
         break;
     case ESP_SPP_SRV_OPEN_EVT:
+        pd_bt_writehandle = param->write.handle;
+            // ((struct spp_open_evt_param *)param)->handle;
         ESP_LOGI(TAG, "ESP_SPP_SRV_OPEN_EVT");
         break;
     default:
diff --git a/main/pdmain.c b/main/pdmain.c
index 446923f..cb360e9 100644
--- a/main/pdmain.c
+++ b/main/pdmain.c
@@ -51,7 +51,7 @@ void trymem(int foo)
             free(foo);
         else break;
     }
-    sprintf(msg, "%d max mem %dk", foo, i-1);
+    sprintf(msg, "%d max mem %dk\n", foo, i-1);
     pdmain_print(msg);
 #endif
 }
@@ -60,7 +60,7 @@ void trymem(int foo)
 static char *pd_bt_buf;
 static int pd_bt_size;
 
-void pd_dispatch_bt(char *data, size_t size)
+void pd_bt_dispatch(char *data, size_t size)
 {
     if (!pd_bt_buf)
         pd_bt_buf = getbytes(0);
@@ -69,7 +69,7 @@ void pd_dispatch_bt(char *data, size_t size)
     pd_bt_size += size;
 }
 
-void pd_poll_bt( void)
+void pd_bt_poll( void)
 {
     int lastchar;
     static t_binbuf *b;
@@ -122,7 +122,7 @@ void pdmain_init( void)
 void pdmain_tick( void)
 {
     memset(soundout, 0, 64*sizeof(float));
-    pd_poll_bt();
+    pd_bt_poll();
     sched_tick();
 }