UART changes: timeout in secs, write bytes, etc.

2 files changed, 7 insertions, 0 deletions

diff --git a/py/stream.c b/py/stream.c
index 8cf375b16..aca9b8460 100644
--- a/py/stream.c
+++ b/py/stream.c
@@ -250,6 +250,9 @@ void mp_stream_write_adaptor(void *self, const char *buf, size_t len) {
 STATIC mp_obj_t stream_write_method(size_t n_args, const mp_obj_t *args) {
     mp_buffer_info_t bufinfo;
     mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_READ);
+    if (!mp_get_stream(args[0])->is_text && MP_OBJ_IS_STR(args[1])) {
+        mp_raise_ValueError(translate("string not supported; use bytes or bytearray"));
+    }
     size_t max_len = (size_t)-1;
     size_t off = 0;
     if (n_args == 3) {
@@ -282,6 +285,9 @@ STATIC mp_obj_t stream_readinto(size_t n_args, const mp_obj_t *args) {
     // https://docs.python.org/3/library/socket.html#socket.socket.recv_into
     mp_uint_t len = bufinfo.len;
     if (n_args > 2) {
+        if (mp_get_stream(args[0])->pyserial_compatibility) {
+            mp_raise_ValueError(translate("length argument not allowed for this type"));
+        }
         len = mp_obj_get_int(args[2]);
         if (len > bufinfo.len) {
             len = bufinfo.len;
diff --git a/py/stream.h b/py/stream.h
index 7b953138c..bcba4f234 100644
--- a/py/stream.h
+++ b/py/stream.h
@@ -70,6 +70,7 @@ typedef struct _mp_stream_p_t {
     mp_uint_t (*write)(mp_obj_t obj, const void *buf, mp_uint_t size, int *errcode);
     mp_uint_t (*ioctl)(mp_obj_t obj, mp_uint_t request, uintptr_t arg, int *errcode);
     mp_uint_t is_text : 1; // default is bytes, set this for text stream
+    bool pyserial_compatibility: 1;  // adjust API to match pyserial more closely
 } mp_stream_p_t;
 
 MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_read_obj);