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#include <stdio.h>
#include <string.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/queue.h>
#include <driver/uart.h>
#include <driver/gpio.h>
#include <esp_log.h>
#include "eos.h"
#include "fe310.h"
#define BUF_SIZE 1024
#define UART_GPIO_DTR 32
static QueueHandle_t uart_queue;
static void uart_event_task(void *pvParameters) {
uart_event_t event;
size_t len;
// Reserve a buffer and process incoming data
uint8_t *data = (uint8_t *) malloc(BUF_SIZE);
while (1) {
/* Waiting for UART event.
*/
if (xQueueReceive(uart_queue, (void * )&event, (portTickType)portMAX_DELAY)) {
switch (event.type) {
case UART_DATA:
/* Event of UART receiving data
*/
len = 0;
uart_get_buffered_data_len(UART_NUM_2, &len);
if (len) {
len = uart_read_bytes(UART_NUM_2, data, len, 100 / portTICK_RATE_MS);
eos_fe310_send(EOS_FE310_CMD_MODEM_DATA, data, len);
}
break;
default:
break;
}
}
}
free(data);
vTaskDelete(NULL);
}
void eos_modem_init(void) {
/* Configure parameters of an UART driver,
* communication pins and install the driver */
uart_config_t uart_config = {
.baud_rate = 115200,
.data_bits = UART_DATA_8_BITS,
.parity = UART_PARITY_DISABLE,
.stop_bits = UART_STOP_BITS_1,
.flow_ctrl = UART_HW_FLOWCTRL_DISABLE
};
uart_param_config(UART_NUM_2, &uart_config);
uart_set_pin(UART_NUM_2, 17, 16, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
uart_driver_install(UART_NUM_2, BUF_SIZE, BUF_SIZE, 10, &uart_queue, 0);
// Configuration for the DTR/RI lines
gpio_config_t io_conf;
io_conf.intr_type = GPIO_INTR_DISABLE;
io_conf.mode = GPIO_MODE_OUTPUT;
io_conf.pin_bit_mask = ((uint64_t)1 << UART_GPIO_DTR);
gpio_config(&io_conf);
gpio_set_level(UART_GPIO_DTR, 1);
// Create a task to handle uart event from ISR
xTaskCreate(uart_event_task, "uart_event_task", 2048, NULL, EOS_PRIORITY_MODEM, NULL);
}
ssize_t eos_modem_write(void *data, size_t size) {
return uart_write_bytes(UART_NUM_2, (const char *)data, size);
}
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