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samd/machine_wdt: Add the machine.WDT class.

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robert-hh 2022-06-06 11:23:09 +02:00 committed by Damien George
parent 32c973d554
commit 7a2f2d88f7
4 changed files with 145 additions and 0 deletions
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2
ports/samd/Makefile
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@ -97,6 +97,7 @@ SRC_C = \
machine_spi.c \
machine_timer.c \
machine_uart.c \
machine_wdt.c \
main.c \
modutime.c \
modmachine.c \
@ -155,6 +156,7 @@ SRC_QSTR += \
machine_spi.c \
machine_timer.c \
machine_uart.c \
machine_wdt.c \
modutime.c \
modmachine.c \
modsamd.c \

141
ports/samd/machine_wdt.c Normal file
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@ -0,0 +1,141 @@
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020-2021 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/runtime.h"
#include "modmachine.h"
#include "sam.h"
#define MIN_TIMEOUT 512
#define MAX_TIMEOUT 16384
typedef struct _machine_wdt_obj_t {
mp_obj_base_t base;
} machine_wdt_obj_t;
extern mp_int_t log2i(mp_int_t num);
STATIC const machine_wdt_obj_t machine_wdt = {{&machine_wdt_type}};
STATIC void set_timeout(uint32_t timeout) {
// Set new timeout. Have to disable WDT first.
// Confine to the valid range
if (timeout < MIN_TIMEOUT) {
timeout = MIN_TIMEOUT;
} else if (timeout > MAX_TIMEOUT) {
timeout = MAX_TIMEOUT;
}
#if defined(MCU_SAMD21)
WDT->CTRL.reg = 0;
while (WDT->STATUS.reg & WDT_STATUS_SYNCBUSY) {
}
WDT->CONFIG.reg = log2i(timeout) - 3;
WDT->CTRL.reg = WDT_CTRL_ENABLE;
while (WDT->STATUS.reg & WDT_STATUS_SYNCBUSY) {
}
#elif defined(MCU_SAMD51)
WDT->CTRLA.reg = 0;
while (WDT->SYNCBUSY.reg & WDT_SYNCBUSY_ENABLE) {
}
WDT->CONFIG.reg = log2i(timeout) - 3;
WDT->CTRLA.reg = WDT_CTRLA_ENABLE;
while (WDT->SYNCBUSY.reg & WDT_SYNCBUSY_ENABLE) {
}
#endif
}
STATIC mp_obj_t machine_wdt_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
enum { ARG_id, ARG_timeout, ARG_lock };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_id, MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_timeout, MP_ARG_INT, {.u_int = 5000} },
};
// Parse the arguments.
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
#if defined(MCU_SAMD51)
// Verify the WDT id. SAMD51 only, saving a few bytes for SAMD21
mp_int_t id = args[ARG_id].u_int;
if (id != 0) {
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("WDT(%d) doesn't exist"), id);
}
#endif
// Start the watchdog (timeout is in milliseconds).
uint32_t timeout = args[ARG_timeout].u_int;
// Configure the WDT
#if defined(MCU_SAMD21)
// Enable APBx clocks and GCLK clock
PM->APBAMASK.reg |= PM_APBAMASK_WDT;
GCLK->CLKCTRL.reg = GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK8 | GCLK_CLKCTRL_ID_WDT;
#elif defined(MCU_SAMD51)
// Enable APBx clocks and 1kHz clock
MCLK->APBAMASK.reg |= MCLK_APBAMASK_WDT;
OSC32KCTRL->OSCULP32K.bit.EN1K = 1;
#endif
set_timeout(timeout);
return MP_OBJ_FROM_PTR(&machine_wdt);
}
STATIC mp_obj_t machine_wdt_feed(mp_obj_t self_in) {
(void)self_in;
WDT->CLEAR.reg = 0xa5;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_wdt_feed_obj, machine_wdt_feed);
STATIC mp_obj_t machine_wdt_timeout_ms(mp_obj_t self_in, mp_obj_t timout_in) {
uint32_t timeout = mp_obj_get_int(timout_in);
set_timeout(timeout);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_wdt_timeout_ms_obj, machine_wdt_timeout_ms);
STATIC const mp_rom_map_elem_t machine_wdt_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_feed), MP_ROM_PTR(&machine_wdt_feed_obj) },
{ MP_ROM_QSTR(MP_QSTR_timeout_ms), MP_ROM_PTR(&machine_wdt_timeout_ms_obj) },
};
STATIC MP_DEFINE_CONST_DICT(machine_wdt_locals_dict, machine_wdt_locals_dict_table);
MP_DEFINE_CONST_OBJ_TYPE(
machine_wdt_type,
MP_QSTR_WDT,
MP_TYPE_FLAG_NONE,
make_new, machine_wdt_make_new,
locals_dict, &machine_wdt_locals_dict
);

1
ports/samd/modmachine.c
View File

@ -159,6 +159,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&machine_spi_type) },
{ MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) },
{ MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&machine_uart_type) },
{ MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&machine_wdt_type) },
{ MP_ROM_QSTR(MP_QSTR_idle), MP_ROM_PTR(&machine_idle_obj) },
{ MP_ROM_QSTR(MP_QSTR_disable_irq), MP_ROM_PTR(&machine_disable_irq_obj) },

1
ports/samd/modmachine.h
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@ -36,5 +36,6 @@ extern const mp_obj_type_t machine_pwm_type;
extern const mp_obj_type_t machine_spi_type;
extern const mp_obj_type_t machine_timer_type;
extern const mp_obj_type_t machine_uart_type;
extern const mp_obj_type_t machine_wdt_type;
#endif // MICROPY_INCLUDED_SAMD_MODMACHINE_H