avr_libraries/zh_avr_pcf8574
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This commit is contained in:
Alexey Zholtikov
2025-09-02 17:37:51 +03:00
parent 196398ac6f
commit 8fa482771e
4 changed files with 122 additions and 68 deletions
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68
zh_avr_pcf8574.c
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@@ -1,8 +1,9 @@
#include "zh_avr_pcf8574.h"
static uint8_t _interrupt_gpio = 0xFF;
static uint8_t _interrupt_port = 0;
static SemaphoreHandle_t _interrupt_semaphore = NULL;
static uint8_t _gpio_matrix[8] = {AVR_BIT0, AVR_BIT1, AVR_BIT2, AVR_BIT3, AVR_BIT4, AVR_BIT5, AVR_BIT6, AVR_BIT7};
static const uint8_t _gpio_matrix[8] PROGMEM = {AVR_BIT0, AVR_BIT1, AVR_BIT2, AVR_BIT3, AVR_BIT4, AVR_BIT5, AVR_BIT6, AVR_BIT7};
static zh_avr_vector_t _vector = {0};
@@ -58,7 +59,7 @@ avr_err_t zh_avr_pcf8574_reset(zh_avr_pcf8574_handle_t *handle)
avr_err_t zh_avr_pcf8574_read_gpio(zh_avr_pcf8574_handle_t *handle, uint8_t gpio, bool *status)
{
ZH_ERROR_CHECK(gpio <= 7, AVR_FAIL);
uint8_t gpio_temp = _gpio_matrix[gpio];
uint8_t gpio_temp = pgm_read_byte(&_gpio_matrix[gpio]);
uint8_t reg_temp = 0;
avr_err_t err = _zh_avr_pcf8574_read_register(handle, &reg_temp);
*status = ((reg_temp & gpio_temp) ? 1 : 0);
@@ -68,7 +69,7 @@ avr_err_t zh_avr_pcf8574_read_gpio(zh_avr_pcf8574_handle_t *handle, uint8_t gpio
avr_err_t zh_avr_pcf8574_write_gpio(zh_avr_pcf8574_handle_t *handle, uint8_t gpio, bool status)
{
ZH_ERROR_CHECK(gpio <= 7, AVR_FAIL);
uint8_t gpio_temp = _gpio_matrix[gpio];
uint8_t gpio_temp = pgm_read_byte(&_gpio_matrix[gpio]);
if (status == true)
{
return _zh_avr_pcf8574_write_register(handle, handle->gpio_status | handle->gpio_work_mode | gpio_temp);
@@ -82,6 +83,11 @@ static avr_err_t _zh_avr_pcf8574_validate_config(const zh_avr_pcf8574_init_confi
ZH_ERROR_CHECK((config->i2c_address >= 0x20 && config->i2c_address <= 0x27) || (config->i2c_address >= 0x38 && config->i2c_address <= 0x3F), AVR_ERR_INVALID_ARG);
ZH_ERROR_CHECK(config->task_priority > tskIDLE_PRIORITY && config->stack_size >= 124, AVR_ERR_INVALID_ARG);
ZH_ERROR_CHECK(config->interrupt_gpio == 0xFF || (config->interrupt_gpio >= PORTD0 && config->interrupt_gpio <= PORTD7), AVR_ERR_INVALID_ARG);
if (config->interrupt_gpio != 0xFF)
{
ZH_ERROR_CHECK(config->interrupt_port >= AVR_PORTB && config->interrupt_port <= AVR_PORTD, AVR_ERR_INVALID_ARG);
_interrupt_port = config->interrupt_port;
}
return AVR_OK;
}
@@ -114,10 +120,29 @@ static avr_err_t _zh_avr_pcf8574_configure_interrupts(const zh_avr_pcf8574_init_
ZH_ERROR_CHECK(err == AVR_OK, err);
err = zh_avr_vector_push_back(&_vector, &handle);
ZH_ERROR_CHECK(err == AVR_OK, err);
DDRD &= ~(1 << _interrupt_gpio);
PORTD |= (1 << _interrupt_gpio);
PCICR |= (1 << PCIE2);
PCMSK2 |= (1 << _interrupt_gpio);
switch (_interrupt_port)
{
case AVR_PORTB:
DDRB &= ~(1 << _interrupt_gpio);
PORTB |= (1 << _interrupt_gpio);
PCICR |= (1 << PCIE0);
PCMSK0 |= (1 << _interrupt_gpio);
break;
case AVR_PORTC:
DDRC &= ~(1 << _interrupt_gpio);
PORTC |= (1 << _interrupt_gpio);
PCICR |= (1 << PCIE1);
PCMSK1 |= (1 << _interrupt_gpio);
break;
case AVR_PORTD:
DDRD &= ~(1 << _interrupt_gpio);
PORTD |= (1 << _interrupt_gpio);
PCICR |= (1 << PCIE2);
PCMSK2 |= (1 << _interrupt_gpio);
break;
default:
break;
}
_interrupt_semaphore = xSemaphoreCreateBinary();
ZH_ERROR_CHECK(_interrupt_semaphore != NULL, AVR_ERR_NO_MEM);
BaseType_t x_err = xTaskCreate(_zh_avr_pcf8574_isr_processing_task, NULL, config->stack_size, NULL, config->task_priority, NULL);
@@ -132,9 +157,28 @@ static avr_err_t _zh_avr_pcf8574_configure_interrupts(const zh_avr_pcf8574_init_
BaseType_t zh_avr_pcf8574_isr_handler(void)
{
BaseType_t xHigherPriorityTaskWoken = pdFALSE;
if ((PIND & (1 << _interrupt_gpio)) == 0)
switch (_interrupt_port)
{
xSemaphoreGiveFromISR(_interrupt_semaphore, &xHigherPriorityTaskWoken);
case AVR_PORTB:
if ((PINB & (1 << _interrupt_gpio)) == 0)
{
xSemaphoreGiveFromISR(_interrupt_semaphore, &xHigherPriorityTaskWoken);
}
break;
case AVR_PORTC:
if ((PINC & (1 << _interrupt_gpio)) == 0)
{
xSemaphoreGiveFromISR(_interrupt_semaphore, &xHigherPriorityTaskWoken);
}
break;
case AVR_PORTD:
if ((PIND & (1 << _interrupt_gpio)) == 0)
{
xSemaphoreGiveFromISR(_interrupt_semaphore, &xHigherPriorityTaskWoken);
}
break;
default:
break;
}
return xHigherPriorityTaskWoken;
}
@@ -163,12 +207,12 @@ static void _zh_avr_pcf8574_isr_processing_task(void *pvParameter)
}
for (uint8_t j = 0; j <= 7; ++j)
{
if ((handle->gpio_work_mode & _gpio_matrix[j]) != 0)
if ((handle->gpio_work_mode & pgm_read_byte(&_gpio_matrix[j])) != 0)
{
if ((old_reg & _gpio_matrix[j]) != (new_reg & _gpio_matrix[j]))
if ((old_reg & pgm_read_byte(&_gpio_matrix[j])) != (new_reg & pgm_read_byte(&_gpio_matrix[j])))
{
event.gpio_number = j;
event.gpio_level = new_reg & _gpio_matrix[j];
event.gpio_level = new_reg & pgm_read_byte(&_gpio_matrix[j]);
extern void zh_avr_pcf8574_event_handler(zh_avr_pcf8574_event_on_isr_t * event);
zh_avr_pcf8574_event_handler(&event);
}