micropython · dpgeorge · Oct 17, 2023 · Aug 22, 2023 · Aug 10, 2023 · Aug 10, 2023
diff --git a/ports/mimxrt/Makefile b/ports/mimxrt/Makefile
@@ -128,6 +128,7 @@ SRC_HAL_IMX_C += \
 	$(MCU_DIR)/drivers/fsl_edma.c \
 	$(MCU_DIR)/drivers/fsl_flexram.c \
 	$(MCU_DIR)/drivers/fsl_flexspi.c \
+	$(MCU_DIR)/drivers/fsl_gpc.c \
 	$(MCU_DIR)/drivers/fsl_gpio.c \
 	$(MCU_DIR)/drivers/fsl_gpt.c \
 	$(MCU_DIR)/drivers/fsl_lpi2c.c \

diff --git a/ports/mimxrt/boards/MIMXRT1011_af.csv b/ports/mimxrt/boards/MIMXRT1011_af.csv
@@ -42,3 +42,4 @@ GPIO_SD_10,FLEXSPI_A_SCLK,LPSPI2_SDO,LPUART2_TXD,,FLEXIO1_IO16,GPIO2_IO10,,,,,,,
 GPIO_SD_11,FLEXSPI_A_DATA3,LPSPI2_SCK,LPUART1_RXD,,FLEXIO1_IO17,GPIO2_IO11,WDOG1_RST_B_DEB,,,,,,ALT5
 GPIO_SD_12,FLEXSPI_A_DQS,LPSPI2_PCS0,LPUART1_TXD,,FLEXIO1_IO18,GPIO2_IO12,WDOG2_RST_B_DEB,,,,,,ALT5
 GPIO_SD_13,FLEXSPI_B_SCLK,SAI3_RX_BCLK,ARM_CM7_TXEV,CCM_PMIC_RDY,FLEXIO1_IO19,GPIO2_IO13,SRC_BT_CFG3,,,,,,ALT5
+PMIC_ON_REQ,SNVS_LP_PMIC_ON_REQ,,,,,GPIO5_IO00,,,,,,,ALT0
diff --git a/ports/mimxrt/boards/MIMXRT1015_af.csv b/ports/mimxrt/boards/MIMXRT1015_af.csv
@@ -55,3 +55,4 @@ GPIO_SD_B1_08,,FLEXSPI_A_DATA0,,SAI3_TX_DATA,LPSPI2_SDO,GPIO3_IO28,,,,,,,ALT5
 GPIO_SD_B1_09,,FLEXSPI_A_DATA2,,SAI3_RX_BCLK,LPSPI2_SDI,GPIO3_IO29,CCM_REF_EN_B,,,,,,ALT5
 GPIO_SD_B1_10,,FLEXSPI_A_DATA1,,SAI3_RX_SYNC,LPSPI2_PCS2,GPIO3_IO30,SRC_SYSTEM_RESET,,,,,,ALT5
 GPIO_SD_B1_11,,FLEXSPI_A_SS0_B,,SAI3_RX_DATA,LPSPI2_PCS3,GPIO3_IO31,SRC_EARLY_RESET,,,,,,ALT5
+PMIC_ON_REQ,SNVS_LP_PMIC_ON_REQ,,,,,GPIO5_IO01,,,,,,,ALT0
diff --git a/ports/mimxrt/boards/MIMXRT1021_af.csv b/ports/mimxrt/boards/MIMXRT1021_af.csv
@@ -92,3 +92,4 @@ GPIO_SD_B1_08,USDHC2_DATA4,FLEXSPI_A_DATA0,ENET_RX_ER,SAI3_TX_DATA,LPSPI2_SDO,GP
 GPIO_SD_B1_09,USDHC2_DATA5,FLEXSPI_A_DATA2,ENET_TX_EN,SAI3_RX_BCLK,LPSPI2_SDI,GPIO3_IO29,CCM_REF_EN_B,,,,,,ALT5
 GPIO_SD_B1_10,USDHC2_DATA6,FLEXSPI_A_DATA1,ENET_TX_DATA0,SAI3_RX_SYNC,LPSPI2_PCS2,GPIO3_IO30,SRC_SYSTEM_RESET,,,,,,ALT5
 GPIO_SD_B1_11,USDHC2_DATA7,FLEXSPI_A_SS0_B,ENET_TX_DATA1,SAI3_RX_DATA,LPSPI2_PCS3,GPIO3_IO31,SRC_EARLY_RESET,,,,,,ALT5
+PMIC_ON_REQ,SNVS_LP_PMIC_ON_REQ,,,,,GPIO5_IO01,,,,,,,ALT0
diff --git a/ports/mimxrt/boards/MIMXRT1052_af.csv b/ports/mimxrt/boards/MIMXRT1052_af.csv
@@ -123,3 +123,6 @@ GPIO_SD_B1_08,USDHC2_DATA4,FLEXSPI_A_DATA0,LPUART7_TXD,SAI1_TX_BCLK,LPSPI2_SOUT,
 GPIO_SD_B1_09,USDHC2_DATA5,FLEXSPI_A_DATA1,LPUART7_RXD,SAI1_TX_SYNC,LPSPI2_SIN,GPIO3_IO09,,,,,,,ALT5
 GPIO_SD_B1_10,USDHC2_DATA6,FLEXSPI_A_DATA2,LPUART2_RXD,LPI2C2_SDA,LPSPI2_PCS2,GPIO3_IO10,,,,,,,ALT5
 GPIO_SD_B1_11,USDHC2_DATA7,FLEXSPI_A_DATA3,LPUART2_TXD,LPI2C2_SCL,LPSPI2_PCS3,GPIO3_IO11,,,,,,,ALT5
+WAKEUP,,,,,,GPIO5_IO00,,NMI_GLUE_NMI,,,,,ALT5
+PMIC_ON_REQ,SNVS_LP_PMIC_ON_REQ,,,,,GPIO5_IO01,,,,,,,ALT0
+PMIC_STBY_REQ,CCM_PMIC_VSTBY_REQ,,,,,GPIO5_IO02,,,,,,,ALT0
diff --git a/ports/mimxrt/boards/MIMXRT1062_af.csv b/ports/mimxrt/boards/MIMXRT1062_af.csv
@@ -123,6 +123,6 @@ GPIO_SD_B1_08,USDHC2_DATA4,FLEXSPI_A_DATA0,LPUART7_TXD,SAI1_TX_BCLK,LPSPI2_SOUT,
 GPIO_SD_B1_09,USDHC2_DATA5,FLEXSPI_A_DATA1,LPUART7_RXD,SAI1_TX_SYNC,LPSPI2_SIN,GPIO3_IO09,,,,,,,ALT5
 GPIO_SD_B1_10,USDHC2_DATA6,FLEXSPI_A_DATA2,LPUART2_RXD,LPI2C2_SDA,LPSPI2_PCS2,GPIO3_IO10,,,,,,,ALT5
 GPIO_SD_B1_11,USDHC2_DATA7,FLEXSPI_A_DATA3,LPUART2_TXD,LPI2C2_SCL,LPSPI2_PCS3,GPIO3_IO11,,,,,,,ALT5
-WAKEUP,,,,,,GPIO5_IO00,,NMI,,,,,ALT5
-PMIC_ON_REQ,SNVS_PMIC_ON_REQ,,,,,GPIO5_IO01,,,,,,,ALT0
-PMIC_STBY_REQ,CCM_PMIC_STBY_REQ,,,,,GPIO5_IO02,,,,,,,ALT0
+WAKEUP,,,,,,GPIO5_IO00,,NMI_GLUE_NMI,,,,,ALT5
+PMIC_ON_REQ,SNVS_LP_PMIC_ON_REQ,,,,,GPIO5_IO01,,,,,,,ALT0
+PMIC_STBY_REQ,CCM_PMIC_VSTBY_REQ,,,,,GPIO5_IO02,,,,,,,ALT0
diff --git a/ports/mimxrt/boards/MIMXRT1064_af.csv b/ports/mimxrt/boards/MIMXRT1064_af.csv
@@ -123,3 +123,6 @@ GPIO_SD_B1_08,USDHC2_DATA4,FLEXSPI_A_DATA0,LPUART7_TXD,SAI1_TX_BCLK,LPSPI2_SOUT,
 GPIO_SD_B1_09,USDHC2_DATA5,FLEXSPI_A_DATA1,LPUART7_RXD,SAI1_TX_SYNC,LPSPI2_SIN,GPIO3_IO09,,,,,,,ALT5
 GPIO_SD_B1_10,USDHC2_DATA6,FLEXSPI_A_DATA2,LPUART2_RXD,LPI2C2_SDA,LPSPI2_PCS2,GPIO3_IO10,,,,,,,ALT5
 GPIO_SD_B1_11,USDHC2_DATA7,FLEXSPI_A_DATA3,LPUART2_TXD,LPI2C2_SCL,LPSPI2_PCS3,GPIO3_IO11,,,,,,,ALT5
+WAKEUP,,,,,,GPIO5_IO00,,NMI_GLUE_NMI,,,,,ALT5
+PMIC_ON_REQ,SNVS_LP_PMIC_ON_REQ,,,,,GPIO5_IO01,,,,,,,ALT0
+PMIC_STBY_REQ,CCM_PMIC_VSTBY_REQ,,,,,GPIO5_IO02,,,,,,,ALT0
diff --git a/ports/mimxrt/boards/MIMXRT1176_af.csv b/ports/mimxrt/boards/MIMXRT1176_af.csv
@@ -107,6 +107,8 @@ GPIO_LPSR_13,JTAG_MUX_MOD,MIC_BITSTREAM1,PIT2_TRIGGER1,,,GPIO6_IO13,,SAI4_RX_DAT
 GPIO_LPSR_14,JTAG_MUX_TCK,MIC_BITSTREAM2,PIT2_TRIGGER2,,,GPIO6_IO14,,SAI4_RX_BCLK,LPSPI5_SOUT,,GPIO12_IO14,,,
 GPIO_LPSR_15,JTAG_MUX_TMS,MIC_BITSTREAM3,PIT2_TRIGGER3,,,GPIO6_IO15,,SAI4_RX_SYNC,LPSPI5_SIN,,GPIO12_IO15,,,
 WAKEUP_DIG,,,,,,GPIO13_IO00,,NMI_GLUE_NMI,,,,,,
+PMIC_ON_REQ_DIG,SNVS_LP_PMIC_ON_REQ,,,,,GPIO13_IO01,,,,,,,,
+PMIC_STBY_REQ_DIG,CCM_PMIC_VSTBY_REQ,,,,,GPIO13_IO02,,,,,,,,
 GPIO_DISP_B1_00,VIDEO_MUX_LCDIF_CLK,ENET_1G_RX_EN,,TMR1_TIMER0,XBAR1_INOUT26,GPIO4_IO21,,,ENET_QOS_RX_EN,,GPIO10_IO21,,,
 GPIO_DISP_B1_01,VIDEO_MUX_LCDIF_ENABLE,ENET_1G_RX_CLK,ENET_1G_RX_ER,TMR1_TIMER1,XBAR1_INOUT27,GPIO4_IO22,,,ENET_QOS_RX_CLK,ENET_QOS_RX_ER,GPIO10_IO22,,,
 GPIO_DISP_B1_02,VIDEO_MUX_LCDIF_HSYNC,ENET_1G_RX_DATA00,LPI2C3_SCL,TMR1_TIMER2,XBAR1_INOUT28,GPIO4_IO23,,,ENET_QOS_RX_DATA00,LPUART1_TXD,GPIO10_IO23,,,

diff --git a/ports/mimxrt/boards/make-pins.py b/ports/mimxrt/boards/make-pins.py
@@ -25,8 +25,8 @@
     r"IOMUXC_(?P<pin>GPIO_DISP_B\d_\d\d)_(?P<function>\w+) (?P<muxRegister>\w+), (?P<muxMode>\w+), (?P<inputRegister>\w+), (?P<inputDaisy>\w+), (?P<configRegister>\w+)",
     r"IOMUXC_(?P<pin>GPIO_LPSR_\d\d)_(?P<function>\w+) (?P<muxRegister>\w+), (?P<muxMode>\w+), (?P<inputRegister>\w+), (?P<inputDaisy>\w+), (?P<configRegister>\w+)",
     r"IOMUXC_[SNVS_]*(?P<pin>WAKEUP[_DIG]*)_(?P<function>\w+) (?P<muxRegister>\w+), (?P<muxMode>\w+), (?P<inputRegister>\w+), (?P<inputDaisy>\w+), (?P<configRegister>\w+)",
-    r"IOMUXC_SNVS_(?P<pin>PMIC_ON_REQ)_(?P<function>\w+) (?P<muxRegister>\w+), (?P<muxMode>\w+), (?P<inputRegister>\w+), (?P<inputDaisy>\w+), (?P<configRegister>\w+)",
-    r"IOMUXC_SNVS_(?P<pin>PMIC_STBY_REQ)_(?P<function>\w+) (?P<muxRegister>\w+), (?P<muxMode>\w+), (?P<inputRegister>\w+), (?P<inputDaisy>\w+), (?P<configRegister>\w+)",
+    r"IOMUXC_[SNVS_]*(?P<pin>PMIC_ON_REQ[_DIG]*)_(?P<function>\w+) (?P<muxRegister>\w+), (?P<muxMode>\w+), (?P<inputRegister>\w+), (?P<inputDaisy>\w+), (?P<configRegister>\w+)",
+    r"IOMUXC_[SNVS_]*(?P<pin>PMIC_STBY_REQ[_DIG]*)_(?P<function>\w+) (?P<muxRegister>\w+), (?P<muxMode>\w+), (?P<inputRegister>\w+), (?P<inputDaisy>\w+), (?P<configRegister>\w+)",
     r"IOMUXC_(?P<pin>GPIO_SNVS_\d\d_DIG)_(?P<function>\w+) (?P<muxRegister>\w+), (?P<muxMode>\w+), (?P<inputRegister>\w+), (?P<inputDaisy>\w+), (?P<configRegister>\w+)",
 ]
 
@@ -152,7 +152,9 @@ def print(self):
                 "WAKEUP": "PIN_SNVS",
                 "WAKEUP_DIG": "PIN_SNVS",
                 "PMIC_ON_REQ": "PIN_SNVS",
+                "PMIC_ON_REQ_DIG": "PIN_SNVS",
                 "PMIC_STBY_REQ": "PIN_SNVS",
+                "PMIC_STBY_REQ_DIG": "PIN_SNVS",
             }
 
             print(

diff --git a/ports/mimxrt/machine_rtc.c b/ports/mimxrt/machine_rtc.c
@@ -25,16 +25,125 @@
  * THE SOFTWARE.
  */
 
+#include "py/mperrno.h"
 #include "py/runtime.h"
+#include "shared/runtime/mpirq.h"
 #include "shared/timeutils/timeutils.h"
 #include "modmachine.h"
 #include "ticks.h"
 #include "fsl_snvs_lp.h"
 #include "fsl_snvs_hp.h"
 
+STATIC mp_int_t timeout = 0;
+
+void machine_rtc_alarm_clear_en(void) {
+    SNVS_LP_SRTC_DisableInterrupts(SNVS, SNVS_LPCR_LPTA_EN_MASK);
+    while (SNVS->LPCR & SNVS_LPCR_LPTA_EN_MASK) {
+    }
+}
+
+void machine_rtc_alarm_set_en() {
+    SNVS_LP_SRTC_EnableInterrupts(SNVS, SNVS_LPCR_LPTA_EN_MASK);
+    while (!(SNVS->LPCR & SNVS_LPCR_LPTA_EN_MASK)) {
+    }
+}
+
+void machine_rtc_alarm_off(bool clear) {
+    machine_rtc_alarm_clear_en();
+    #ifdef MIMXRT117x_SERIES
+    DisableIRQ(SNVS_HP_NON_TZ_IRQn);
+    #else
+    DisableIRQ(SNVS_HP_WRAPPER_IRQn);
+    #endif
+
+    if (clear) {
+        SNVS->LPTAR = 0;
+        timeout = 0;
+        SNVS->LPSR = SNVS_LPSR_LPTA_MASK;
+    }
+}
+
+void machine_rtc_alarm_on() {
+    #ifdef MIMXRT117x_SERIES
+    EnableIRQ(SNVS_HP_NON_TZ_IRQn);
+    #else
+    EnableIRQ(SNVS_HP_WRAPPER_IRQn);
+    #endif
+    machine_rtc_alarm_set_en();
+}
+
+uint32_t machine_rtc_get_seconds() {
+    uint32_t seconds = 0;
+    uint32_t tmp = 0;
+
+    // Do consecutive reads until value is correct
+    do {
+        seconds = tmp;
+        tmp = (SNVS->LPSRTCMR << 17U);
+        tmp |= (SNVS->LPSRTCLR >> 15U);
+    } while (tmp != seconds);
+
+    return seconds;
+}
+
+void machine_rtc_alarm_helper(int seconds, bool repeat) {
+    machine_rtc_alarm_off(true);
+
+    SNVS->LPTAR = machine_rtc_get_seconds() + seconds;
+
+    if (repeat) {
+        timeout = seconds;
+    }
+
+    machine_rtc_alarm_on();
+}
+
+typedef struct _machine_rtc_irq_obj_t {
+    mp_irq_obj_t base;
+} machine_rtc_irq_obj_t;
+
+STATIC mp_uint_t machine_rtc_irq_trigger(mp_obj_t self_in, mp_uint_t new_trigger) {
+    new_trigger /= 1000;
+    if (!new_trigger) {
+        machine_rtc_alarm_off(true);
+    } else {
+        machine_rtc_alarm_helper(new_trigger, true);
+    }
+    return 0;
+}
+
+STATIC mp_uint_t machine_rtc_irq_info(mp_obj_t self_in, mp_uint_t info_type) {
+    return 0;
+}
+
+STATIC const mp_irq_methods_t machine_rtc_irq_methods = {
+    .trigger = machine_rtc_irq_trigger,
+    .info = machine_rtc_irq_info,
+};
+
+void SNVS_HP_WRAPPER_IRQHandler(void) {
+    if (SNVS->LPSR & SNVS_LPSR_LPTA_MASK) {
+        SNVS->LPSR = SNVS_LPSR_LPTA_MASK;
+        machine_rtc_irq_obj_t *irq = MP_STATE_PORT(machine_rtc_irq_object);
+        if (irq != NULL) {
+            mp_irq_handler(&irq->base);
+        }
+        if (timeout > 0) {
+            machine_rtc_alarm_clear_en();
+            SNVS->LPTAR += timeout;
+            machine_rtc_alarm_set_en();
+        }
+    }
+}
+
+// Deinit rtc IRQ handler.
+void machine_rtc_irq_deinit(void) {
+    machine_rtc_alarm_off(true);
+    MP_STATE_PORT(machine_rtc_irq_object) = NULL;
+}
+
 typedef struct _machine_rtc_obj_t {
     mp_obj_base_t base;
-    mp_obj_t callback;
 } machine_rtc_obj_t;
 
 // Singleton RTC object.
@@ -163,11 +272,130 @@ STATIC mp_obj_t machine_rtc_calibration(mp_obj_t self_in, mp_obj_t cal_in) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_rtc_calibration_obj, machine_rtc_calibration);
 
+STATIC mp_obj_t machine_rtc_alarm(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    STATIC const mp_arg_t allowed_args[] = {
+        { MP_QSTR_id,                            MP_ARG_INT,  {.u_int = 0} },
+        { MP_QSTR_time,                          MP_ARG_OBJ,  {.u_obj = mp_const_none} },
+        { MP_QSTR_repeat,     MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), allowed_args, args);
+
+    // check the alarm id
+    if (args[0].u_int != 0) {
+        mp_raise_OSError(MP_ENODEV);
+    }
+
+    mp_int_t seconds = 0;
+    snvs_lp_srtc_datetime_t srtc_date;
+    bool repeat = args[2].u_bool;
+    if (mp_obj_is_type(args[1].u_obj, &mp_type_tuple)) { // datetime tuple given
+        // repeat cannot be used with a datetime tuple
+        if (repeat) {
+            mp_raise_ValueError(MP_ERROR_TEXT("invalid argument(s) value"));
+        }
+        // Set date and time.
+        mp_obj_t *items;
+        mp_int_t year;
+        mp_obj_get_array_fixed_n(args[1].u_obj, 8, &items);
+
+        year = mp_obj_get_int(items[0]);
+        srtc_date.year = year >= 100 ? year : year + 2000; // allow 21 for 2021
+        srtc_date.month = mp_obj_get_int(items[1]);
+        srtc_date.day = mp_obj_get_int(items[2]);
+        // Ignore weekday at items[3]
+        srtc_date.hour = mp_obj_get_int(items[4]);
+        srtc_date.minute = mp_obj_get_int(items[5]);
+        srtc_date.second = mp_obj_get_int(items[6]);
+        machine_rtc_alarm_off(true);
+        if (SNVS_LP_SRTC_SetAlarm(SNVS, &srtc_date) != kStatus_Success) {
+            mp_raise_ValueError(NULL);
+        }
+        machine_rtc_alarm_on();
+    } else { // then it must be an integer
+        seconds = (args[1].u_obj == mp_const_none) ? 0 : (mp_obj_get_int(args[1].u_obj) / 1000);
+        machine_rtc_alarm_helper(seconds, repeat);
+    }
+
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_rtc_alarm_obj, 1, machine_rtc_alarm);
+
+STATIC mp_obj_t machine_rtc_alarm_left(size_t n_args, const mp_obj_t *args) {
+    // only alarm id 0 is available
+    if (n_args > 1 && mp_obj_get_int(args[1]) != 0) {
+        mp_raise_OSError(MP_ENODEV);
+    }
+    uint32_t seconds = machine_rtc_get_seconds();
+    uint32_t alarmSeconds = SNVS->LPTAR;
+    return mp_obj_new_int((alarmSeconds >= seconds) ? ((alarmSeconds - seconds) * 1000) : 0);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_rtc_alarm_left_obj, 1, 2, machine_rtc_alarm_left);
+
+STATIC mp_obj_t machine_rtc_alarm_cancel(size_t n_args, const mp_obj_t *args) {
+    // only alarm id 0 is available
+    if (n_args > 1 && mp_obj_get_int(args[1]) != 0) {
+        mp_raise_OSError(MP_ENODEV);
+    }
+    machine_rtc_alarm_off(true);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_rtc_alarm_cancel_obj, 1, 2, machine_rtc_alarm_cancel);
+
+STATIC mp_obj_t machine_rtc_irq(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_trigger, ARG_handler, ARG_wake, ARG_hard };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_trigger, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_handler, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+        { MP_QSTR_wake, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_hard, MP_ARG_BOOL, {.u_bool = false} },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    // check we want alarm0
+    if (args[ARG_trigger].u_int != 0) {
+        mp_raise_OSError(MP_ENODEV);
+    }
+
+    machine_rtc_irq_obj_t *irq = MP_STATE_PORT(machine_rtc_irq_object);
+
+    // Allocate the IRQ object if it doesn't already exist.
+    if (irq == NULL) {
+        irq = m_new_obj(machine_rtc_irq_obj_t);
+        irq->base.base.type = &mp_irq_type;
+        irq->base.methods = (mp_irq_methods_t *)&machine_rtc_irq_methods;
+        irq->base.parent = MP_OBJ_FROM_PTR(pos_args[0]);
+        irq->base.handler = mp_const_none;
+        irq->base.ishard = args[ARG_hard].u_bool;
+        MP_STATE_PORT(machine_rtc_irq_object) = irq;
+    }
+
+    machine_rtc_alarm_off(false);
+
+    irq->base.handler = args[ARG_handler].u_obj;
+
+    if (SNVS->LPTAR) {
+        machine_rtc_alarm_on();
+    }
+
+    return MP_OBJ_FROM_PTR(irq);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_rtc_irq_obj, 1, machine_rtc_irq);
+
 STATIC const mp_rom_map_elem_t machine_rtc_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_rtc_init_obj) },
     { MP_ROM_QSTR(MP_QSTR_datetime), MP_ROM_PTR(&machine_rtc_datetime_obj) },
     { MP_ROM_QSTR(MP_QSTR_now), MP_ROM_PTR(&machine_rtc_now_obj) },
     { MP_ROM_QSTR(MP_QSTR_calibration), MP_ROM_PTR(&machine_rtc_calibration_obj) },
+    { MP_ROM_QSTR(MP_QSTR_alarm), MP_ROM_PTR(&machine_rtc_alarm_obj) },
+    { MP_ROM_QSTR(MP_QSTR_alarm_left), MP_ROM_PTR(&machine_rtc_alarm_left_obj) },
+    { MP_ROM_QSTR(MP_QSTR_alarm_cancel), MP_ROM_PTR(&machine_rtc_alarm_cancel_obj) },
+    { MP_ROM_QSTR(MP_QSTR_cancel), MP_ROM_PTR(&machine_rtc_alarm_cancel_obj) },
+    { MP_ROM_QSTR(MP_QSTR_irq), MP_ROM_PTR(&machine_rtc_irq_obj) },
+    { MP_ROM_QSTR(MP_QSTR_ALARM0), MP_ROM_INT(0) },
 };
 STATIC MP_DEFINE_CONST_DICT(machine_rtc_locals_dict, machine_rtc_locals_dict_table);
 
@@ -178,3 +406,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     make_new, machine_rtc_make_new,
     locals_dict, &machine_rtc_locals_dict
     );
+
+MP_REGISTER_ROOT_POINTER(void *machine_rtc_irq_object);
diff --git a/ports/mimxrt/main.c b/ports/mimxrt/main.c
@@ -141,6 +141,7 @@ int main(void) {
     soft_reset_exit:
         mp_printf(MP_PYTHON_PRINTER, "MPY: soft reboot\n");
         machine_pin_irq_deinit();
+        machine_rtc_irq_deinit();
         #if MICROPY_PY_MACHINE_I2S
         machine_i2s_deinit_all();
         #endif