1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
#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 "net.h"
#include "cell.h"
#define MIN(X, Y) (((X) < (Y)) ? (X) : (Y))
#define MAX(X, Y) (((X) > (Y)) ? (X) : (Y))
#define UART_BUF_SIZE 1024
#define UART_GPIO_TXD 16
#define UART_GPIO_RXD 17
#define UART_GPIO_DTR 32
#define UART_GPIO_RI 35
#define UART_EVENT_MODE_NONE 0
#define UART_EVENT_MODE_PPP 1
#define UART_EVENT_MODE_RELAY 2
static QueueHandle_t uart_queue;
// static uint8_t *uart_data[UART_BUF_SIZE];
static const char *TAG = "EOS MODEM";
static void uart_event_task(void *pvParameters) {
char mode = 0;
uart_event_t event;
size_t len;
unsigned char *buf;
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
*/
switch (mode) {
case UART_EVENT_MODE_PPP:
break;
case UART_EVENT_MODE_RELAY:
buf = eos_net_alloc();
buf[0] = EOS_CELL_MTYPE_DATA;
len = uart_read_bytes(UART_NUM_2, buf+1, MIN(event.size, EOS_NET_SIZE_BUF-1), 100 / portTICK_RATE_MS);
eos_net_send(EOS_NET_MTYPE_CELL, buf, len, 0);
break;
default:
break;
}
break;
case UART_EVENT_MAX:
/* Mode change
*/
mode = (char)event.size;
break;
default:
break;
}
}
}
vTaskDelete(NULL);
}
static void modem_handler(unsigned char _mtype, unsigned char *buffer, uint16_t size) {
uint8_t mtype = buffer[0];
switch (mtype) {
case EOS_CELL_MTYPE_DATA:
eos_modem_write(buffer+1, size-1);
break;
case EOS_CELL_MTYPE_DATA_START:
eos_modem_set_mode(UART_EVENT_MODE_RELAY);
break;
case EOS_CELL_MTYPE_DATA_STOP:
eos_modem_set_mode(0);
break;
}
}
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, UART_GPIO_TXD, UART_GPIO_RXD, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
uart_driver_install(UART_NUM_2, UART_BUF_SIZE, UART_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", EOS_TASK_SSIZE_UART, NULL, EOS_TASK_PRIORITY_UART, NULL);
eos_net_set_handler(EOS_NET_MTYPE_CELL, modem_handler);
ESP_LOGI(TAG, "INIT");
}
ssize_t eos_modem_write(void *data, size_t size) {
return uart_write_bytes(UART_NUM_2, (const char *)data, size);
}
void eos_modem_set_mode(char mode) {
uart_event_t evt;
evt.type = UART_EVENT_MAX; /* my type */
evt.size = mode;
xQueueSend(uart_queue, (void *)&evt, portMAX_DELAY);
}
|
