GPIO中断漏触发

srtan_mfp
Posts: 1
Joined: Fri Aug 26, 2022 2:39 am

GPIO中断漏触发

Postby srtan_mfp » Fri Aug 26, 2022 3:04 am

用ESP32通过SPI读取设备数据,采用GPIO中断方式触发读取,设备数据准备好后通过GPIO5上升沿触发。GPIO的配置完全按照例程设置,SPI的配置是在eeprom例程的基础上改的。
现象是运行程序可以进入中断读取设备数据,但读取一段时间后,中断不再触发。
中断不触发的原因是设备数据准备好发出上升沿后,如果没有通过SPI读取数据,则设备输出将保持高电平,不会在输出上升沿,直到读取数据后恢复正常。我这样判断的原因是在main_app()函数的循环中加入延时和读取数据的操作后,可以连续产生中断,不会停止。
我的问题是:如何保证每次上升沿中断都被触发并调用中断服务函数?设备正常输出上升沿触发中断的频次是3200次/秒。

IO配置程序如下:

#define GPIO_INPUT_IO_1 5
#define GPIO_INPUT_PIN_SEL (1ULL<<GPIO_INPUT_IO_1)
#define ESP_INTR_FLAG_DEFAULT 0

static xQueueHandle gpio_evt_queue = NULL;
eeprom_handle_t eeprom_handle;
short Accel_RAW[3] = {0,0,0};
void get_acc(void){
Accel_Device_Read_Accel_Raw(eeprom_handle, Accel_RAW);//读取设备数据
printf("x = %d, y = %d, z= %d.\r\n", Accel_RAW[0],Accel_RAW[1],Accel_RAW[2]);//输出
}

static void IRAM_ATTR gpio_isr_handler(void* arg)
{
uint32_t gpio_num = (uint32_t) arg;
xQueueSendFromISR(gpio_evt_queue, &gpio_num, NULL);
}

static void gpio_task_example(void* arg)
{
uint32_t io_num;
for(;;) {
if(xQueueReceive(gpio_evt_queue, &io_num, portMAX_DELAY)) {
printf("GPIO[%d] intr, val: %d\n", io_num, gpio_get_level(io_num));
get_acc();
}
vTaskDelay(10 / portTICK_RATE_MS);
}
}

void app_main(void)
{
ESP_ERROR_CHECK(init_services());

// Set UART log level
esp_log_level_set(TAG, ESP_LOG_INFO);

ESP_LOGI(TAG, "Initializing device...");

//zero-initialize the config structure.
gpio_config_t io_conf = {};
//interrupt of rising edge
io_conf.intr_type = GPIO_INTR_POSEDGE;
//bit mask of the pins, use GPIO4/5 here
io_conf.pin_bit_mask = GPIO_INPUT_PIN_SEL;
//set as input mode
io_conf.mode = GPIO_MODE_INPUT;
//enable pull-up mode
io_conf.pull_down_en = 1;
gpio_config(&io_conf);
//create a queue to handle gpio event from isr
gpio_evt_queue = xQueueCreate(10, sizeof(uint32_t));
//start gpio task
xTaskCreate(gpio_task_example, "gpio_task_example", 2048, NULL, 10, NULL);

//install gpio isr service
gpio_install_isr_service(ESP_INTR_FLAG_DEFAULT);

//hook isr handler for specific gpio pin
gpio_isr_handler_add(GPIO_INPUT_IO_1, gpio_isr_handler, (void*) GPIO_INPUT_IO_1);

Accel_Device_Read_Accel_Raw(eeprom_handle, Accel_RAW);// 读取设备数据

ESP_LOGI(TAG, "Initialization finished.");

while (1) {

ESP_LOGI(TAG, "In main\r\n");
vTaskDelay(1000 / portTICK_RATE_MS);
// Accel_Device_Read_Accel_Raw(eeprom_handle, Accel_RAW);//加入这句后中断可以连续触发,不会停止
}

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