cc3200: Default peripheral ID support on I2C.

cc3200/mods/pybi2c.c

@@ -279,19 +279,7 @@ STATIC void pyb_i2c_print(const mp_print_t *print, mp_obj_t self_in, mp_print_ki
     }
 }
 
-/// \method init()
-STATIC const mp_arg_t pyb_i2c_init_args[] = {
-    { MP_QSTR_mode,                        MP_ARG_INT, {.u_int = PYBI2C_MASTER} },
-    { MP_QSTR_baudrate, MP_ARG_KW_ONLY   | MP_ARG_INT, {.u_int = 100000} },
-    { MP_QSTR_pins,     MP_ARG_KW_ONLY   | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
-};
-#define PYB_I2C_INIT_NUM_ARGS   MP_ARRAY_SIZE(pyb_i2c_init_args)
-
-STATIC mp_obj_t pyb_i2c_init_helper(pyb_i2c_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
-    // parse args
-    mp_arg_val_t args[PYB_I2C_INIT_NUM_ARGS];
-    mp_arg_parse_all(n_args, pos_args, kw_args, PYB_I2C_INIT_NUM_ARGS, pyb_i2c_init_args, args);
-
+STATIC mp_obj_t pyb_i2c_init_helper(pyb_i2c_obj_t *self, mp_arg_val_t *args) {
     // verify that mode is master
     if (args[0].u_int != PYBI2C_MASTER) {
         goto invalid_args;
@@ -329,32 +317,49 @@ invalid_args:
     nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
 }
 
-/// \classmethod \constructor(bus, ...)
-STATIC mp_obj_t pyb_i2c_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
-    // check arguments
-    mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
-
-    // setup the object
-    pyb_i2c_obj_t *self = &pyb_i2c_obj;
-    self->base.type = &pyb_i2c_type;
+STATIC const mp_arg_t pyb_i2c_init_args[] = {
+    { MP_QSTR_id,                          MP_ARG_OBJ, {.u_obj = mp_const_none} },
+    { MP_QSTR_mode,                        MP_ARG_INT, {.u_int = PYBI2C_MASTER} },
+    { MP_QSTR_baudrate, MP_ARG_KW_ONLY   | MP_ARG_INT, {.u_int = 100000} },
+    { MP_QSTR_pins,     MP_ARG_KW_ONLY   | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+};
+#define PYB_I2C_INIT_NUM_ARGS   MP_ARRAY_SIZE(pyb_i2c_init_args)
+STATIC mp_obj_t pyb_i2c_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *all_args) {
+    // parse args
+    mp_map_t kw_args;
+    mp_map_init_fixed_table(&kw_args, n_kw, all_args + n_args);
+    mp_arg_val_t args[MP_ARRAY_SIZE(pyb_i2c_init_args)];
+    mp_arg_parse_all(n_args, all_args, &kw_args, MP_ARRAY_SIZE(args), pyb_i2c_init_args, args);
+
+    // work out the uart id
+    uint8_t i2c_id;
+    if (args[0].u_obj == mp_const_none) {
+        // default id
+        i2c_id = 0;
+    } else {
+        i2c_id = mp_obj_get_int(args[0].u_obj);
+    }
 
     // check the peripheral id
-    if (mp_obj_get_int(args[0]) != 0) {
+    if (i2c_id != 0) {
         nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_resource_not_avaliable));
     }
 
-    if (n_args > 1 || n_kw > 0) {
+    // setup the object
+    pyb_i2c_obj_t *self = &pyb_i2c_obj;
+    self->base.type = &pyb_i2c_type;
+
     // start the peripheral
-        mp_map_t kw_args;
-        mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
-        pyb_i2c_init_helper(self, n_args - 1, args + 1, &kw_args);
-    }
+    pyb_i2c_init_helper(self, &args[1]);
 
     return (mp_obj_t)self;
 }
 
-STATIC mp_obj_t pyb_i2c_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
-    return pyb_i2c_init_helper(args[0], n_args - 1, args + 1, kw_args);
+STATIC mp_obj_t pyb_i2c_init(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    // parse args
+    mp_arg_val_t args[MP_ARRAY_SIZE(pyb_i2c_init_args) - 1];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), &pyb_i2c_init_args[1], args);
+    return pyb_i2c_init_helper(pos_args[0], args);
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_i2c_init_obj, 1, pyb_i2c_init);
 

cc3200/qstrdefsport.h

@@ -153,6 +153,7 @@ Q(RX_ANY)
 
 // for I2C class
 Q(I2C)
+Q(id)
 Q(mode)
 Q(baudrate)
 Q(pins)

tests/wipy/i2c.py

@@ -16,6 +16,13 @@ elif 'WiPy' in machine:
 else:
     raise Exception('Board not supported!')
 
+i2c = I2C(0, I2C.MASTER, baudrate=400000)
+# try initing without the peripheral id
+i2c = I2C()
+print(i2c)
+i2c = I2C(mode=I2C.MASTER, baudrate=50000, pins=i2c_pins)
+print(i2c)
+
 i2c = I2C(0, I2C.MASTER, baudrate=100000)
 print(i2c)
 i2c = I2C(0, mode=I2C.MASTER, baudrate=400000)

tests/wipy/i2c.py.exp

@@ -1,4 +1,6 @@
 I2C(0, I2C.MASTER, baudrate=100000)
+I2C(0, I2C.MASTER, baudrate=50000)
+I2C(0, I2C.MASTER, baudrate=100000)
 I2C(0, I2C.MASTER, baudrate=400000)
 I2C(0, I2C.MASTER, baudrate=400000)
 104

tests/wipy/uart.py

@@ -30,6 +30,7 @@ for uart_id in uart_id_range:
     uart = UART(baudrate=1000000)
     uart.sendbreak()
 
+uart = UART(baudrate=1000000)
 uart = UART()
 print(uart)
 uart = UART(baudrate=38400, pins=('GP12', 'GP13'))