samd/mpconfigport: Restructure to use ROM feature levels.

Changes are:
- Set the feature level for each MCU: CORE features for SAMD21, and EXTRA
  features for SAMD51.
- Remove all definitions that are included in the core feature level.
- Keep the default settings for feature level and float, to make the choice
  obvious.

ports/samd/Makefile

@@ -161,6 +161,7 @@ SRC_QSTR += \
 	shared/readline/readline.c \
 	extmod/uos_dupterm.c \
 	shared/runtime/mpirq.c \
+	shared/runtime/sys_stdio_mphal.c \
 
 SRC_QSTR += $(SRC_MOD) $(SRC_CXX)
 

ports/samd/mcu/samd21/mpconfigmcu.h

@@ -1,16 +1,24 @@
 // Deinitions common to all SAMD21 boards
 #include "samd21.h"
 
-#define MICROPY_HW_FLASH_STORAGE_BASE       (0x30000)
-#define MICROPY_HW_FLASH_STORAGE_BYTES      (0xFFFF)
-#define VFS_BLOCK_SIZE_BYTES                (1536) // 24x 64B flash pages;
+#define MICROPY_CONFIG_ROM_LEVEL        (MICROPY_CONFIG_ROM_LEVEL_CORE_FEATURES)
 
-#define MICROPY_HW_UART_TXBUF               (1)
+// MicroPython emitters
+#define MICROPY_EMIT_THUMB              (0)
+#define MICROPY_EMIT_INLINE_THUMB       (0)
 
-#define CPU_FREQ            (48000000)
-#define APB_FREQ            (48000000)
+#define MICROPY_FLOAT_IMPL              (MICROPY_FLOAT_IMPL_NONE)
 
-#define IRQ_PRI_PENDSV          ((1 << __NVIC_PRIO_BITS) - 1)
+#define MICROPY_HW_FLASH_STORAGE_BASE   (0x30000)
+#define MICROPY_HW_FLASH_STORAGE_BYTES  (0xFFFF)
+#define VFS_BLOCK_SIZE_BYTES            (1536) // 24x 64B flash pages;
+
+#define MICROPY_HW_UART_TXBUF           (1)
+
+#define CPU_FREQ                        (48000000)
+#define APB_FREQ                        (48000000)
+
+#define IRQ_PRI_PENDSV                  ((1 << __NVIC_PRIO_BITS) - 1)
 
 static inline uint32_t raise_irq_pri(uint32_t pri) {
     (void)pri;

ports/samd/mcu/samd51/mpconfigmcu.h

@@ -1,10 +1,17 @@
 // Deinitions common to all SAMD51 boards
 #include "samd51.h"
 
+#define MICROPY_CONFIG_ROM_LEVEL        (MICROPY_CONFIG_ROM_LEVEL_FULL_FEATURES)
+
+// MicroPython emitters
+#define MICROPY_EMIT_THUMB              (1)
+#define MICROPY_EMIT_INLINE_THUMB       (1)
+
 #define MICROPY_FLOAT_IMPL              (MICROPY_FLOAT_IMPL_FLOAT)
 #define MICROPY_PY_BUILTINS_COMPLEX     (0)
 #define MICROPY_PY_MATH                 (0)
 #define MICROPY_PY_CMATH                (0)
+
 #define MICROPY_PY_UOS_URANDOM          (1)
 #define MICROPY_PY_URANDOM_SEED_INIT_FUNC (trng_random_u32())
 unsigned long trng_random_u32(void);
@@ -15,18 +22,18 @@ unsigned long trng_random_u32(void);
 // samd_flash.c flash parameters
 // Build a 128k Flash storage at top. 512k-128k=384k=0x60000
 // 512*1024= 0x80000 minus 128*1024= 0x20000 =  0x60000
-#define MICROPY_HW_FLASH_STORAGE_BASE       (0x60000)
-#define MICROPY_HW_FLASH_STORAGE_BYTES      (0x1FFFF)
-#define VFS_BLOCK_SIZE_BYTES                (1536) //
+#define MICROPY_HW_FLASH_STORAGE_BASE   (0x60000)
+#define MICROPY_HW_FLASH_STORAGE_BYTES  (0x1FFFF)
+#define VFS_BLOCK_SIZE_BYTES            (1536) //
 
-#define MICROPY_HW_UART_TXBUF               (1)
+#define MICROPY_HW_UART_TXBUF           (1)
 
-#define CPU_FREQ            (120000000)
-#define APB_FREQ            (48000000)
-#define DPLLx_REF_FREQ      (32768)
+#define CPU_FREQ                        (120000000)
+#define APB_FREQ                        (48000000)
+#define DPLLx_REF_FREQ                  (32768)
 
-#define NVIC_PRIORITYGROUP_4    ((uint32_t)0x00000003)
-#define IRQ_PRI_PENDSV          NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 7, 0)
+#define NVIC_PRIORITYGROUP_4            ((uint32_t)0x00000003)
+#define IRQ_PRI_PENDSV                  NVIC_EncodePriority(NVIC_PRIORITYGROUP_4, 7, 0)
 
 static inline uint32_t raise_irq_pri(uint32_t pri) {
     uint32_t basepri = __get_BASEPRI();

ports/samd/mpconfigport.h

@@ -40,8 +40,6 @@
 
 // MicroPython emitters
 #define MICROPY_PERSISTENT_CODE_LOAD        (1)
-#define MICROPY_EMIT_THUMB                  (0)
-#define MICROPY_EMIT_INLINE_THUMB           (0)
 
 // Compiler configuration
 #define MICROPY_COMP_CONST                  (1)
@@ -56,33 +54,18 @@
 #define MICROPY_ENABLE_SOURCE_LINE          (1)
 #define MICROPY_STREAMS_NON_BLOCK           (1)
 #define MICROPY_ERROR_REPORTING             (MICROPY_ERROR_REPORTING_TERSE)
-#define MICROPY_CPYTHON_COMPAT              (0)
-#define MICROPY_CAN_OVERRIDE_BUILTINS       (1)
 #define MICROPY_PY_BUILTINS_HELP            (1)
 #define MICROPY_PY_BUILTINS_HELP_TEXT       samd_help_text
 #define MICROPY_PY_BUILTINS_HELP_MODULES    (1)
 #define MICROPY_ENABLE_SCHEDULER            (1)
-// fixes sys/usys import issue
 #define MICROPY_MODULE_WEAK_LINKS           (1)
+
 // Control over Python builtins
-#define MICROPY_PY_ASYNC_AWAIT              (0)
 #define MICROPY_PY_BUILTINS_BYTES_HEX       (1)
-#define MICROPY_PY_BUILTINS_STR_COUNT       (0)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW      (1)
-#define MICROPY_PY_BUILTINS_SET             (0)
-#define MICROPY_PY_BUILTINS_FROZENSET       (0)
-#define MICROPY_PY_BUILTINS_PROPERTY        (0)
-#define MICROPY_PY_BUILTINS_ENUMERATE       (1)
-#define MICROPY_PY_BUILTINS_FILTER          (0)
-#define MICROPY_PY_BUILTINS_REVERSED        (0)
-#define MICROPY_PY_BUILTINS_NOTIMPLEMENTED  (1)
-#define MICROPY_PY_BUILTINS_MIN_MAX         (1)
 #define MICROPY_PY_BUILTINS_INPUT           (1)
-#define MICROPY_PY___FILE__                 (0)
 #define MICROPY_PY_MICROPYTHON_MEM_INFO     (1)
 #define MICROPY_PY_ARRAY_SLICE_ASSIGN       (1)
-#define MICROPY_PY_ATTRTUPLE                (1)
-#define MICROPY_PY_COLLECTIONS              (0)
 #define MICROPY_PY_SYS                      (1)
 #define MICROPY_PY_SYS_PLATFORM             "samd"
 #define MICROPY_PY_SYS_EXIT                 (1)
@@ -118,10 +101,6 @@
 #define MICROPY_PY_MACHINE_PWM_DUTY_U16_NS  (1)
 #define MICROPY_PY_MACHINE_PWM_INCLUDEFILE  "ports/samd/machine_pwm.c"
 
-// Use VfsLfs's types for fileio/textio
-#define mp_type_fileio mp_type_vfs_lfs1_fileio
-#define mp_type_textio mp_type_vfs_lfs1_textio
-
 #define MP_STATE_PORT MP_STATE_VM
 
 // Miscellaneous settings