adds spi polarity, phase, mode converter functions to lcd_utils

Author: kdschlosser

ext_mod/lcd_utils/src/lcd_utils.c

@@ -5,10 +5,38 @@
 #include "py/runtime.h"
 
 
+static mp_obj_t spi_mode_to_polarity_phase(mp_obj_t mode)
+{
+    uint8_t spi_mode = (uint8_t)mp_obj_get_int_truncated(mode);
+    uint8_t polarity = (spi_mode >> 1) & 0x1;
+    uint8_t phase = spi_mode & 0x01;
+    mp_obj_t tuple[2] = {
+        mp_obj_new_int_from_uint(polarity),
+        mp_obj_new_int_from_uint(phase),
+    };
+    return mp_obj_new_tuple(2, tuple);
+}
+
+static MP_DEFINE_CONST_FUN_OBJ_1(spi_mode_to_polarity_phase_obj, spi_mode_to_polarity_phase);
+
+
+static mp_obj_t spi_polarity_phase_to_mode(mp_obj_t polarity, mp_obj_t phase)
+{
+    uint8_t spi_polarity = (uint8_t)mp_obj_get_int_truncated(polarity);
+    uint8_t spi_phase = (uint8_t)mp_obj_get_int_truncated(phase);
+    return mp_obj_new_int_from_uint(spi_mode);
+}
+
+static MP_DEFINE_CONST_FUN_OBJ_2(spi_polarity_phase_to_mode_obj, spi_polarity_phase_to_mode);
+
+
 static const mp_rom_map_elem_t mp_lcd_utils_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__),           MP_OBJ_NEW_QSTR(MP_QSTR_lcd_utils)  },
     { MP_ROM_QSTR(MP_QSTR_remap),              MP_ROM_PTR(&mp_lcd_utils_remap_obj) },
     { MP_ROM_QSTR(MP_QSTR_int_float_converter),    MP_ROM_PTR(&mp_lcd_utils_int_float_converter_obj) },
+    { MP_ROM_QSTR(MP_QSTR_spi_mode_to_polarity_phase),    MP_ROM_PTR(&spi_mode_to_polarity_phase_obj) },
+    { MP_ROM_QSTR(MP_QSTR_spi_polarity_phase_to_mode),    MP_ROM_PTR(&spi_polarity_phase_to_mode_obj) },
+
 };
 
 static MP_DEFINE_CONST_DICT(mp_lcd_utils_module_globals, mp_lcd_utils_module_globals_table);

lcd_utils.pyi

@@ -25,3 +25,26 @@ def remap(
 
 def int_float_converter(value: Union[float, int], /) -> Union[float, int]:
     ...
+
+
+def spi_mode_to_polarity_phase(mode: int, /) -> tuple[int]:
+    """
+
+    :param mode: spi mode, can be 0, 1, 2 or 3
+    :type mode: `int`
+
+    :returns: the 2 integer values as `(polarity, phase)`
+    :rtype: `tuple`
+    """
+
+def spi_polarity_phase_to_mode(polarity: int, phase: int, /) -> int:
+    """
+    :param polarity: 1 or 0
+    :type polarity: `int`
+
+    :param phase: 1 or 0
+    :type phase: `int`
+
+    :returns: 0, 1, 2 or 3
+    :rtype: `int`
+    """

micropy_updates/esp32/machine_i2c.c

@@ -417,7 +417,7 @@
         if (ret < 0) {
             mp_raise_OSError(-ret);
         }
-        
+
         return mp_const_none;
     }