cc3200: New WDT API.
This commit is contained in:
Daniel Campora
parent
8332044f75
commit
41f6948545
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@ -88,48 +88,52 @@ void pybwdt_sl_alive (void) {
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/******************************************************************************/
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// Micro Python bindings
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/// \function constructor('msec')
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/// Enables the watchdog timer with msec timeout value
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STATIC mp_obj_t pyb_wdt_make_new (mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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STATIC const mp_arg_t pyb_wdt_init_args[] = {
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{ MP_QSTR_id, MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_timeout, MP_ARG_INT, {.u_int = 5000} }, // 5 s
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};
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STATIC mp_obj_t pyb_wdt_make_new (mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *all_args) {
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// check the arguments
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mp_arg_check_num(n_args, n_kw, 0, 1, false);
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw, all_args + n_args);
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mp_arg_val_t args[MP_ARRAY_SIZE(pyb_wdt_init_args)];
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mp_arg_parse_all(n_args, all_args, &kw_args, MP_ARRAY_SIZE(args), pyb_wdt_init_args, args);
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if (n_args > 0) {
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mp_int_t msec = mp_obj_get_int(args[0]);
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if (msec < PYBWDT_MIN_TIMEOUT_MS) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
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}
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if (pybwdt_data.running) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
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}
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// Enable the WDT peripheral clock
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MAP_PRCMPeripheralClkEnable(PRCM_WDT, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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// Unlock to be able to configure the registers
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MAP_WatchdogUnlock(WDT_BASE);
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#ifdef DEBUG
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// make the WDT stall when the debugger stops on a breakpoint
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MAP_WatchdogStallEnable (WDT_BASE);
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#endif
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// set the watchdog timer reload value
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// the WDT trigger a system reset after the second timeout
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// so, divide by 2 the timeout value received
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MAP_WatchdogReloadSet(WDT_BASE, PYBWDT_MILLISECONDS_TO_TICKS(msec / 2));
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// start the timer. Once it's started, it cannot be disabled.
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MAP_WatchdogEnable(WDT_BASE);
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pybwdt_data.running = true;
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if (args[0].u_obj != mp_const_none && mp_obj_get_int(args[0].u_obj) > 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_resource_not_avaliable));
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}
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uint timeout_ms = args[1].u_int;
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if (timeout_ms < PYBWDT_MIN_TIMEOUT_MS) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
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}
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if (pybwdt_data.running) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
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}
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// Enable the WDT peripheral clock
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MAP_PRCMPeripheralClkEnable(PRCM_WDT, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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// Unlock to be able to configure the registers
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MAP_WatchdogUnlock(WDT_BASE);
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#ifdef DEBUG
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// make the WDT stall when the debugger stops on a breakpoint
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MAP_WatchdogStallEnable (WDT_BASE);
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#endif
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// set the watchdog timer reload value
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// the WDT trigger a system reset after the second timeout
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// so, divide by 2 the timeout value received
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MAP_WatchdogReloadSet(WDT_BASE, PYBWDT_MILLISECONDS_TO_TICKS(timeout_ms / 2));
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// start the timer. Once it's started, it cannot be disabled.
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MAP_WatchdogEnable(WDT_BASE);
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pybwdt_data.running = true;
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return (mp_obj_t)&pyb_wdt_obj;
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}
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/// \function wdt.kick()
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/// Kicks the watchdog timer
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STATIC mp_obj_t pyb_wdt_kick(mp_obj_t self) {
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STATIC mp_obj_t pyb_wdt_feed(mp_obj_t self) {
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if ((pybwdt_data.servers || pybwdt_data.servers_sleeping) && pybwdt_data.simplelink && pybwdt_data.running) {
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pybwdt_data.servers = false;
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pybwdt_data.simplelink = false;
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@ -137,10 +141,10 @@ STATIC mp_obj_t pyb_wdt_kick(mp_obj_t self) {
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_wdt_kick_obj, pyb_wdt_kick);
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_wdt_feed_obj, pyb_wdt_feed);
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STATIC const mp_map_elem_t pybwdt_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_kick), (mp_obj_t)&pyb_wdt_kick_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_feed), (mp_obj_t)&pyb_wdt_feed_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(pybwdt_locals_dict, pybwdt_locals_dict_table);
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@ -299,7 +299,8 @@ Q(EXTERNAL)
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// for WDT class
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Q(WDT)
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Q(kick)
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Q(feed)
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Q(timeout)
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// for HeartBeat class
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Q(HeartBeat)
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@ -10,24 +10,23 @@ watchdog periodically to prevent it from expiring and resetting the system.
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Example usage::
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wdt = pyb.WDT(5000) # enable with a timeout of 5s
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wdt.kick()
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wdt = pyb.WDT(timeout=2000) # enable with a timeout of 2s
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wdt.feed()
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Constructors
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------------
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.. class:: pyb.WDT([timeout])
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.. class:: pyb.WDT(id=0, timeout=5000)
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Create a WDT object. If the timeout is specified the WDT is started.
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The timeout must be given in seconds and 1s the minimum value that
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is accepted. Once it is running the timeout cannot be changed and
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the WDT cannot be stopped either.
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Create a WDT object and start it. The timeout must be given in seconds and
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the minimum value that is accepted is 1 second. Once it is running the timeout
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cannot be changed and the WDT cannot be stopped either.
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Methods
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-------
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.. method:: wdt.kick()
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.. method:: wdt.feed()
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Kick the WDT to prevent it from resetting the system. The application
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Feed the WDT to prevent it from resetting the system. The application
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should place this call in a sensible place ensuring that the WDT is
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only kicked after verifying that everything is functioning correctly.
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only fed after verifying that everything is functioning correctly.
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@ -0,0 +1,37 @@
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'''
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WDT test for the CC3200 based boards
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'''
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from pyb import WDT
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# test the invalid cases first
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try:
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wdt = WDT(1)
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except Exception:
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print("Exception")
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try:
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wdt = WDT(0, 500)
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except Exception:
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print("Exception")
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try:
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wdt = WDT(1, timeout=2000)
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except Exception:
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print("Exception")
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wdt = WDT(timeout=1000)
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print(wdt)
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try:
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wdt = WDT(0, timeout=2000)
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except Exception:
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print("Exception")
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pyb.delay(500)
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wdt.feed()
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print(wdt)
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pyb.delay(900)
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wdt.feed()
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print(wdt)
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pyb.delay(950)
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@ -0,0 +1,7 @@
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Exception
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Exception
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Exception
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<WDT>
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Exception
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<WDT>
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<WDT>
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