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@ -28,8 +28,6 @@ |
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#include <stddef.h> |
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#include <string.h> |
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#include <stm32f4xx_hal.h> |
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#include "py/nlr.h" |
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#include "py/runtime.h" |
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#include "py/gc.h" |
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@ -101,13 +99,7 @@ typedef struct { |
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mp_int_t line; |
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} extint_obj_t; |
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typedef struct { |
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mp_obj_t callback_obj; |
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void *param; |
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uint32_t mode; |
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} extint_vector_t; |
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STATIC extint_vector_t extint_vector[EXTI_NUM_VECTORS]; |
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STATIC uint32_t pyb_extint_mode[EXTI_NUM_VECTORS]; |
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#if !defined(ETH) |
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#define ETH_WKUP_IRQn 62 // The 405 doesn't have ETH, but we want a value to put in our table
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@ -123,10 +115,7 @@ STATIC const uint8_t nvic_irq_channel[EXTI_NUM_VECTORS] = { |
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// Set override_callback_obj to true if you want to unconditionally set the
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// callback function.
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//
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// NOTE: param is for C callers. Python can use closure to get an object bound
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// with the function.
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uint extint_register(mp_obj_t pin_obj, uint32_t mode, uint32_t pull, mp_obj_t callback_obj, bool override_callback_obj, void *param) { |
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uint extint_register(mp_obj_t pin_obj, uint32_t mode, uint32_t pull, mp_obj_t callback_obj, bool override_callback_obj) { |
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const pin_obj_t *pin = NULL; |
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uint v_line; |
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@ -159,22 +148,21 @@ uint extint_register(mp_obj_t pin_obj, uint32_t mode, uint32_t pull, mp_obj_t ca |
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "invalid ExtInt Pull: %d", pull)); |
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} |
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extint_vector_t *v = &extint_vector[v_line]; |
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if (!override_callback_obj && v->callback_obj != mp_const_none && callback_obj != mp_const_none) { |
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mp_obj_t *cb = &MP_STATE_PORT(pyb_extint_callback)[v_line]; |
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if (!override_callback_obj && *cb != mp_const_none && callback_obj != mp_const_none) { |
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "ExtInt vector %d is already in use", v_line)); |
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} |
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// We need to update callback and param atomically, so we disable the line
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// We need to update callback atomically, so we disable the line
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// before we update anything.
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extint_disable(v_line); |
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v->callback_obj = callback_obj; |
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v->param = param; |
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v->mode = (mode & 0x00010000) ? // GPIO_MODE_IT == 0x00010000
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*cb = callback_obj; |
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pyb_extint_mode[v_line] = (mode & 0x00010000) ? // GPIO_MODE_IT == 0x00010000
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EXTI_Mode_Interrupt : EXTI_Mode_Event; |
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if (v->callback_obj != mp_const_none) { |
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if (*cb != mp_const_none) { |
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GPIO_InitTypeDef exti; |
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exti.Pin = pin->pin_mask; |
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@ -199,7 +187,7 @@ void extint_enable(uint line) { |
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// Since manipulating IMR/EMR is a read-modify-write, and we want this to
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// be atomic, we use the bit-band area to just affect the bit we're
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// interested in.
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EXTI_MODE_BB(extint_vector[line].mode, line) = 1; |
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EXTI_MODE_BB(pyb_extint_mode[line], line) = 1; |
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} |
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void extint_disable(uint line) { |
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@ -303,7 +291,7 @@ STATIC mp_obj_t extint_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_ |
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extint_obj_t *self = m_new_obj(extint_obj_t); |
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self->base.type = type_in; |
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self->line = extint_register(vals[0].u_obj, vals[1].u_int, vals[2].u_int, vals[3].u_obj, false, NULL); |
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self->line = extint_register(vals[0].u_obj, vals[1].u_int, vals[2].u_int, vals[3].u_obj, false); |
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return self; |
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} |
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@ -343,11 +331,10 @@ const mp_obj_type_t extint_type = { |
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}; |
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void extint_init0(void) { |
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for (extint_vector_t *v = extint_vector; v < &extint_vector[EXTI_NUM_VECTORS]; v++) { |
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v->callback_obj = mp_const_none; |
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v->param = NULL; |
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v->mode = EXTI_Mode_Interrupt; |
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} |
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for (int i = 0; i < PYB_EXTI_NUM_VECTORS; i++) { |
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MP_STATE_PORT(pyb_extint_callback)[i] = mp_const_none; |
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pyb_extint_mode[i] = EXTI_Mode_Interrupt; |
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} |
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} |
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// Interrupt handler
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@ -355,18 +342,18 @@ void Handle_EXTI_Irq(uint32_t line) { |
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if (__HAL_GPIO_EXTI_GET_FLAG(1 << line)) { |
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__HAL_GPIO_EXTI_CLEAR_FLAG(1 << line); |
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if (line < EXTI_NUM_VECTORS) { |
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extint_vector_t *v = &extint_vector[line]; |
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if (v->callback_obj != mp_const_none) { |
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mp_obj_t *cb = &MP_STATE_PORT(pyb_extint_callback)[line]; |
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if (*cb != mp_const_none) { |
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// When executing code within a handler we must lock the GC to prevent
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// any memory allocations. We must also catch any exceptions.
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gc_lock(); |
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nlr_buf_t nlr; |
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if (nlr_push(&nlr) == 0) { |
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mp_call_function_1(v->callback_obj, MP_OBJ_NEW_SMALL_INT(line)); |
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mp_call_function_1(*cb, MP_OBJ_NEW_SMALL_INT(line)); |
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nlr_pop(); |
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} else { |
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// Uncaught exception; disable the callback so it doesn't run again.
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v->callback_obj = mp_const_none; |
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*cb = mp_const_none; |
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extint_disable(line); |
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printf("Uncaught exception in ExtInt interrupt handler line %lu\n", line); |
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mp_obj_print_exception(printf_wrapper, NULL, (mp_obj_t)nlr.ret_val); |
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Damien George
10 years ago