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use return values in STM PWMOut constructor, not exceptions

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This commit is contained in:
Dan Halbert 2021-03-11 08:52:47 -05:00
parent 7029783985
commit 08c5dbb003
6 changed files with 56 additions and 31 deletions
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10
ports/esp32s2/boards/adafruit_funhouse/board.c
View File

@ -54,8 +54,8 @@ void board_init(void) {
// Debug UART
#ifdef DEBUG
common_hal_never_reset_pin(&pin_GPIO43);
common_hal_never_reset_pin(&pin_GPIO44);
common_hal_never_reset_pin(&pin_GPIO37);
common_hal_never_reset_pin(&pin_GPIO38);
#endif /* DEBUG */
busio_spi_obj_t* spi = &displays[0].fourwire_bus.inline_bus;
@ -73,9 +73,13 @@ void board_init(void) {
0, // Polarity
0); // Phase
// workaround as board_init() is called before reset_port() in main.c
pwmout_reset();
displayio_display_obj_t* display = &displays[0].display;
display->base.type = &displayio_display_type;
common_hal_displayio_display_construct(display,
common_hal_displayio_display_construct(
display,
bus,
240, // Width (after rotation)
240, // Height (after rotation)

2
ports/esp32s2/boards/adafruit_funhouse/pins.c
View File

@ -33,7 +33,7 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_LIGHT), MP_ROM_PTR(&pin_GPIO18) },
{ MP_ROM_QSTR(MP_QSTR_SPEAKER), MP_ROM_PTR(&pin_GPIO46) },
// { MP_ROM_QSTR(MP_QSTR_SPEAKER), MP_ROM_PTR(&pin_GPIO46) },
{ MP_ROM_QSTR(MP_QSTR_LED), MP_ROM_PTR(&pin_GPIO37) },

6
ports/esp32s2/common-hal/pwmio/PWMOut.c
View File

@ -93,7 +93,7 @@ pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,
}
if (timer_index == INDEX_EMPTY) {
// Running out of timers isn't pin related on ESP32S2 so we can't re-use error messages
mp_raise_ValueError(translate("No more timers available"));
return PWMOUT_ALL_TIMERS_IN_USE;
}
// Find a viable channel
@ -104,7 +104,7 @@ pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,
}
}
if (channel_index == INDEX_EMPTY) {
mp_raise_ValueError(translate("No more channels available"));
return PWMOUT_ALL_CHANNELS_IN_USE;
}
// Run configuration
@ -126,7 +126,7 @@ pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,
self->chan_handle.timer_sel = timer_index;
if (ledc_channel_config(&(self->chan_handle))) {
mp_raise_ValueError(translate("Could not initialize channel"));
return PWMOUT_INITIALIZATION_ERROR;
}
// Make reservations

29
ports/stm/common-hal/pwmio/PWMOut.c
View File

@ -48,7 +48,7 @@ STATIC uint32_t timer_get_internal_duty(uint16_t duty, uint32_t period) {
return (duty*period) / ((1 << 16) - 1);
}
STATIC void timer_get_optimal_divisors(uint32_t*period, uint32_t*prescaler,
STATIC bool timer_get_optimal_divisors(uint32_t*period, uint32_t*prescaler,
uint32_t frequency, uint32_t source_freq) {
//Find the largest possible period supported by this frequency
for (int i = 0; i < (1 << 16); i++) {
@ -58,9 +58,8 @@ STATIC void timer_get_optimal_divisors(uint32_t*period, uint32_t*prescaler,
break;
}
}
if (*prescaler == 0) {
mp_raise_ValueError(translate("Invalid frequency supplied"));
}
// Return successor failure.
return *prescaler != 0;
}
void pwmout_reset(void) {
@ -138,16 +137,14 @@ pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,
tim_frequencies[self->tim->tim_index - 1] = frequency;
stm_peripherals_timer_reserve(TIMx);
} else { //no match found
if (tim_chan_taken) {
mp_raise_ValueError(translate("No more timers available on this pin."));
} else if (tim_taken_internal) {
mp_raise_ValueError(translate("Timer was reserved for internal use - declare PWM pins earlier in the program"));
if (tim_chan_taken || tim_taken_internal) {
return PWMOUT_ALL_TIMERS_ON_PIN_IN_USE;
} else if (tim_taken_f_mismatch) {
mp_raise_ValueError(translate("Frequency must match existing PWMOut using this timer"));
return PWMOUT_INVALID_FREQUENCY_ON_PIN;
} else if (var_freq_mismatch) {
mp_raise_ValueError(translate("Cannot vary frequency on a timer that is already in use"));
return PWMOUT_VARIABLE_FREQUENCY_NOT_AVAILABLE;
} else {
mp_raise_ValueError(translate("Invalid pins for PWMOut"));
return PWMOUT_INVALID_PIN;
}
}
@ -167,7 +164,9 @@ pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,
uint32_t prescaler = 0; //prescaler is 15 bit
uint32_t period = 0; //period is 16 bit
uint32_t source_freq = stm_peripherals_timer_get_source_freq(TIMx);
timer_get_optimal_divisors(&period, &prescaler, frequency, source_freq);
if (!timer_get_optimal_divisors(&period, &prescaler, frequency, source_freq)) {
return PWMOUT_INVALID_FREQUENCY;
}
//Timer init
self->handle.Instance = TIMx;
@ -180,7 +179,7 @@ pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,
//only run init if this is the first instance of this timer
if (first_time_setup) {
if (HAL_TIM_PWM_Init(&self->handle) != HAL_OK) {
mp_raise_ValueError(translate("Could not initialize timer"));
return PWMOUT_INITIALIZATION_ERROR;
}
}
@ -190,10 +189,10 @@ pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,
self->chan_handle.OCPolarity = TIM_OCPOLARITY_HIGH;
self->chan_handle.OCFastMode = TIM_OCFAST_DISABLE;
if (HAL_TIM_PWM_ConfigChannel(&self->handle, &self->chan_handle, self->channel) != HAL_OK) {
mp_raise_ValueError(translate("Could not initialize channel"));
return PWMOUT_INITIALIZATION_ERROR;
}
if (HAL_TIM_PWM_Start(&self->handle, self->channel) != HAL_OK) {
mp_raise_ValueError(translate("Could not start PWM"));
return PWMOUT_INITIALIZATION_ERROR;
}
self->variable_frequency = variable_frequency;

26
shared-bindings/pwmio/PWMOut.c
View File

@ -102,14 +102,32 @@ STATIC mp_obj_t pwmio_pwmout_make_new(const mp_obj_type_t *type, size_t n_args,
pwmio_pwmout_obj_t *self = m_new_obj(pwmio_pwmout_obj_t);
self->base.type = &pwmio_pwmout_type;
pwmout_result_t result = common_hal_pwmio_pwmout_construct(self, pin, duty_cycle, frequency, variable_frequency);
if (result == PWMOUT_INVALID_PIN) {
switch (result) {
case PWMOUT_INVALID_PIN:
mp_raise_ValueError(translate("Invalid pin"));
} else if (result == PWMOUT_INVALID_FREQUENCY) {
break;
case PWMOUT_INVALID_FREQUENCY:
mp_raise_ValueError(translate("Invalid PWM frequency"));
} else if (result == PWMOUT_ALL_TIMERS_ON_PIN_IN_USE) {
break;
case PWMOUT_INVALID_FREQUENCY_ON_PIN:
mp_raise_ValueError(translate("Frequency must match existing PWMOut using this timer"));
break;
case PWMOUT_VARIABLE_FREQUENCY_NOT_AVAILABLE:
mp_raise_ValueError(translate("Cannot vary frequency on a timer that is already in use"));
break;
case PWMOUT_ALL_TIMERS_ON_PIN_IN_USE:
mp_raise_ValueError(translate("All timers for this pin are in use"));
} else if (result == PWMOUT_ALL_TIMERS_IN_USE) {
break;
case PWMOUT_ALL_TIMERS_IN_USE:
mp_raise_RuntimeError(translate("All timers in use"));
break;
case PWMOUT_ALL_CHANNELS_IN_USE:
mp_raise_RuntimeError(translate("All channels in use"));
break;
default:
case PWMOUT_INITIALIZATION_ERROR:
mp_raise_RuntimeError(translate("Could not start PWM"));
break;
}
return MP_OBJ_FROM_PTR(self);

6
shared-bindings/pwmio/PWMOut.h
View File

@ -36,8 +36,12 @@ typedef enum pwmout_result_t {
PWMOUT_OK,
PWMOUT_INVALID_PIN,
PWMOUT_INVALID_FREQUENCY,
PWMOUT_INVALID_FREQUENCY_ON_PIN,
PWMOUT_VARIABLE_FREQUENCY_NOT_AVAILABLE,
PWMOUT_ALL_TIMERS_ON_PIN_IN_USE,
PWMOUT_ALL_TIMERS_IN_USE
PWMOUT_ALL_TIMERS_IN_USE,
PWMOUT_ALL_CHANNELS_IN_USE,
PWMOUT_INITIALIZATION_ERROR,
} pwmout_result_t;
extern pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,