avr_libraries/zh_avr_pcf8574
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feat: added all gpio support

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This commit is contained in:
Alexey Zholtikov
2025-09-03 09:58:12 +03:00
parent 196398ac6f
commit 6b8b8c3314
4 changed files with 74 additions and 20 deletions
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16
README.md
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@@ -9,7 +9,7 @@
## Note
1. Enable interrupt support only if input GPIO's are used.
2. All the INT GPIO's on the extenders must be connected to the one GPIO on AVR. Only PORTD0 - PORTD7 are acceptable!
2. All the INT GPIO's on the extenders must be connected to the one GPIO on AVR.
3. The input GPIO's are always pullup to the power supply.
## Dependencies
@@ -78,8 +78,9 @@ void pcf8574_example_task(void *pvParameters)
zh_avr_i2c_master_init(false);
zh_avr_pcf8574_init_config_t pcf8574_init_config = ZH_AVR_PCF8574_INIT_CONFIG_DEFAULT();
pcf8574_init_config.i2c_address = 0x38;
pcf8574_init_config.p0_gpio_work_mode = true; // Required only for input GPIO.
pcf8574_init_config.interrupt_gpio = PORTD4; // Required only if used input GPIO interrupts.
pcf8574_init_config.p0_gpio_work_mode = true; // Required only for input GPIO.
pcf8574_init_config.interrupt_port = AVR_PORTD; // Required only if used input GPIO interrupts.
pcf8574_init_config.interrupt_gpio = PORTD4; // Required only if used input GPIO interrupts.
zh_avr_pcf8574_init(&pcf8574_init_config, &pcf8574_handle);
uint8_t reg = 0;
zh_avr_pcf8574_read(&pcf8574_handle, &reg);
@@ -124,8 +125,13 @@ void zh_avr_pcf8574_event_handler(zh_avr_pcf8574_event_on_isr_t *event) // Do no
printf("Interrupt Task Remaining Stack Size %d.\n", uxTaskGetStackHighWaterMark(NULL));
}
ISR(PCINT2_vect) // Required only if used input GPIO interrupts.
// ISR(PCINT0_vect) // For AVR_PORTB. Required only if used input GPIO interrupts.
// ISR(PCINT1_vect) // For AVR_PORTC. Required only if used input GPIO interrupts.
ISR(PCINT2_vect) // For AVR_PORTD. Required only if used input GPIO interrupts.
{
zh_avr_pcf8574_isr_handler();
if (zh_avr_pcf8574_isr_handler() == pdTRUE)
{
portYIELD();
}
}
```