samd/modmachine: Add machine.dht_readinto and enable on SAMD51.

ports/samd/mcu/samd51/mpconfigmcu.h

@@ -13,6 +13,7 @@
 #define MP_NEED_LOG2                    (1)
 #define MICROPY_PY_CMATH                (0)
 
+#define MICROPY_PY_MACHINE_DHT_READINTO (1)
 #define MICROPY_PY_UOS_URANDOM          (1)
 #define MICROPY_PY_URANDOM_SEED_INIT_FUNC (trng_random_u32())
 unsigned long trng_random_u32(void);

ports/samd/mcu/samd51/mpconfigmcu.mk

@@ -2,6 +2,8 @@ MICROPY_VFS_LFS2 ?= 1
 
 SRC_S += shared/runtime/gchelper_m3.s
 
+SRC_C += drivers/dht/dht.c \
+
 LIBM_SRC_C +=  $(addprefix lib/libm/,\
 	acoshf.c \
 	asinfacosf.c \

ports/samd/modmachine.c

@@ -30,6 +30,7 @@
 #include "extmod/machine_pulse.h"
 #include "extmod/machine_i2c.h"
 #include "extmod/machine_spi.h"
+#include "drivers/dht/dht.h"
 #include "modmachine.h"
 #include "samd_soc.h"
 
@@ -179,6 +180,9 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_reset_cause),         MP_ROM_PTR(&machine_reset_cause_obj) },
     { MP_ROM_QSTR(MP_QSTR_time_pulse_us),       MP_ROM_PTR(&machine_time_pulse_us_obj) },
     { MP_ROM_QSTR(MP_QSTR_bitstream),           MP_ROM_PTR(&machine_bitstream_obj) },
+    #if MICROPY_PY_MACHINE_DHT_READINTO
+    { MP_ROM_QSTR(MP_QSTR_dht_readinto),        MP_ROM_PTR(&dht_readinto_obj) },
+    #endif
 
     // Class constants.
     // Use numerical constants instead of the symbolic names,

ports/samd/mphalport.h

@@ -99,6 +99,9 @@ static inline uint64_t mp_hal_time_ns(void) {
 #define MP_HAL_PIN_FMT "%u"
 #define mp_hal_pin_obj_t uint
 
+#define mp_hal_quiet_timing_enter() MICROPY_BEGIN_ATOMIC_SECTION()
+#define mp_hal_quiet_timing_exit(irq_state) MICROPY_END_ATOMIC_SECTION(irq_state)
+
 extern uint32_t machine_pin_open_drain_mask[];
 
 mp_hal_pin_obj_t mp_hal_get_pin_obj(mp_obj_t pin_in);