micropython
diff --git a/‎extmod/machine_i2s.c‎
Lines changed: 10 additions & 20 deletions b/‎extmod/machine_i2s.c‎
Lines changed: 10 additions & 20 deletions
@@ -600,6 +600,7 @@ STATIC mp_uint_t machine_i2s_stream_write(mp_obj_t self_in, const void *buf_in,
 
         return size;
     } else { // blocking or asyncio mode
+
         mp_buffer_info_t appbuf;
         appbuf.buf = (void *)buf_in;
         appbuf.len = size;
@@ -608,6 +609,7 @@ STATIC mp_uint_t machine_i2s_stream_write(mp_obj_t self_in, const void *buf_in,
         #else
         uint32_t num_bytes_written = copy_appbuf_to_dma(self, &appbuf);
         #endif
+
         return num_bytes_written;
     }
 }
@@ -623,6 +625,7 @@ STATIC mp_uint_t machine_i2s_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_
 
         if (flags & MP_STREAM_POLL_RD) {
             if (self->mode != MICROPY_PY_MACHINE_I2S_CONSTANT_RX) {
+
                 *errcode = MP_EPERM;
                 return MP_STREAM_ERROR;
             }
@@ -632,21 +635,14 @@ STATIC mp_uint_t machine_i2s_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_
                 ret |= MP_STREAM_POLL_RD;
             }
             #else
-            // check event queue to determine if a DMA buffer has been filled
-            // (which is an indication that at least one DMA buffer is available to be read)
-            // note:  timeout = 0 so the call is non-blocking
-            i2s_event_t i2s_event;
-            if (xQueueReceive(self->i2s_event_queue, &i2s_event, 0)) {
-                if (i2s_event.type == I2S_EVENT_RX_DONE) {
-                    // getting here means that at least one DMA buffer is now full
-                    // indicating that audio samples can be read from the I2S object
-                    ret |= MP_STREAM_POLL_RD;
-                }
+            if (self->dma_buffer_status == DMA_MEMORY_NOT_EMPTY) {
+                ret |= MP_STREAM_POLL_RD;
             }
             #endif
         }
 
         if (flags & MP_STREAM_POLL_WR) {
+
             if (self->mode != MICROPY_PY_MACHINE_I2S_CONSTANT_TX) {
                 *errcode = MP_EPERM;
                 return MP_STREAM_ERROR;
@@ -657,20 +653,14 @@ STATIC mp_uint_t machine_i2s_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_
                 ret |= MP_STREAM_POLL_WR;
             }
             #else
-            // check event queue to determine if a DMA buffer has been emptied
-            // (which is an indication that at least one DMA buffer is available to be written)
-            // note:  timeout = 0 so the call is non-blocking
-            i2s_event_t i2s_event;
-            if (xQueueReceive(self->i2s_event_queue, &i2s_event, 0)) {
-                if (i2s_event.type == I2S_EVENT_TX_DONE) {
-                    // getting here means that at least one DMA buffer is now empty
-                    // indicating that audio samples can be written to the I2S object
-                    ret |= MP_STREAM_POLL_WR;
-                }
+
+            if (self->dma_buffer_status == DMA_MEMORY_NOT_FULL) {
+                ret |= MP_STREAM_POLL_WR;
             }
             #endif
         }
     } else {
+
         *errcode = MP_EINVAL;
         ret = MP_STREAM_ERROR;
     }