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TCP2UART/App/config.c
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/**
* @file config.c
* @brief Bare-metal final AT configuration module implementation.
*/
#include "config.h"
#include "flash_param.h"
#include "../Core/Inc/usart.h"
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define CONFIG_TX_BUFFER_SIZE 512u
#define CONFIG_CMD_MAX_LEN 160u
#define CONFIG_UART_HANDLE huart1
typedef struct {
uint32_t magic;
uint16_t version;
uint16_t reserved;
uint8_t mac[6];
uint8_t dhcp_enable;
uint8_t reserved2;
uint8_t ip[4];
uint8_t mask[4];
uint8_t gw[4];
uint16_t server_port;
uint16_t reserved3;
uint8_t remote_ip[4];
uint16_t remote_port;
uint16_t reconnect_interval;
uint32_t uart2_baudrate;
uint32_t uart3_baudrate;
uint8_t uart2_databits;
uint8_t uart2_stopbits;
uint8_t uart2_parity;
uint8_t uart3_databits;
uint8_t uart3_stopbits;
uint8_t uart3_parity;
uint16_t reserved4;
uint32_t crc;
} legacy_device_config_v2_t;
static device_config_t g_config;
static volatile bool g_reset_requested;
static uint8_t g_uart_cmd_buffer[CONFIG_CMD_MAX_LEN];
static uint16_t g_uart_cmd_len;
static bool g_uart_rx_seen_cr;
static char g_pending_cmd_buffer[CONFIG_CMD_MAX_LEN];
static volatile uint16_t g_pending_cmd_len;
static volatile bool g_pending_cmd_ready;
static char g_at_response_buffer[CONFIG_TX_BUFFER_SIZE];
static char g_cmd_parse_buffer[CONFIG_CMD_MAX_LEN];
static char g_cmd_work_buffer[CONFIG_CMD_MAX_LEN];
static uint32_t config_calc_crc(const device_config_t *cfg)
{
return flash_param_crc32(cfg, offsetof(device_config_t, crc));
}
static const char *skip_whitespace(const char *str)
{
while (*str == ' ' || *str == '\t') {
++str;
}
return str;
}
static void trim_trailing(char *str)
{
int len = (int)strlen(str);
while (len > 0 && (str[len - 1] == ' ' || str[len - 1] == '\t' || str[len - 1] == '\r' || str[len - 1] == '\n')) {
str[--len] = '\0';
}
}
static bool equals_ignore_case(const char *a, const char *b)
{
while (*a != '\0' && *b != '\0') {
char c1 = *a++;
char c2 = *b++;
if (c1 >= 'a' && c1 <= 'z') {
c1 -= 32;
}
if (c2 >= 'a' && c2 <= 'z') {
c2 -= 32;
}
if (c1 != c2) {
return false;
}
}
return (*a == '\0' && *b == '\0');
}
static int prefix_equals_ignore_case(const char *str, const char *prefix)
{
while (*prefix != '\0') {
char c1 = *str++;
char c2 = *prefix++;
if (c1 >= 'a' && c1 <= 'z') {
c1 -= 32;
}
if (c2 >= 'a' && c2 <= 'z') {
c2 -= 32;
}
if (c1 != c2) {
return 0;
}
}
return 1;
}
static int parse_u32_value(const char *value, uint32_t min_value, uint32_t max_value, uint32_t *parsed_value)
{
char *endptr;
unsigned long parsed;
if (value == NULL || parsed_value == NULL) {
return -1;
}
parsed = strtoul(value, &endptr, 10);
if (endptr == value || *skip_whitespace(endptr) != '\0') {
return -1;
}
if (parsed < min_value || parsed > max_value) {
return -1;
}
*parsed_value = (uint32_t)parsed;
return 0;
}
static int parse_link_uart(const char *value, uint8_t *uart)
{
if (equals_ignore_case(value, "U0")) {
*uart = LINK_UART_U0;
return 0;
}
if (equals_ignore_case(value, "U1")) {
*uart = LINK_UART_U1;
return 0;
}
return -1;
}
static const char *link_uart_to_str(uint8_t uart)
{
return (uart == LINK_UART_U1) ? "U1" : "U0";
}
static bool parse_command_with_value(const char *cmd, const char *name, const char **value)
{
size_t name_len;
if (cmd == NULL || name == NULL || value == NULL) {
return false;
}
name_len = strlen(name);
if (!prefix_equals_ignore_case(cmd, name)) {
return false;
}
if (cmd[name_len] != '=') {
return false;
}
*value = skip_whitespace(cmd + name_len + 1u);
return true;
}
static char *config_next_token(char **cursor)
{
char *start;
char *end;
if (cursor == NULL || *cursor == NULL) {
return NULL;
}
start = *cursor;
while (*start == ' ' || *start == '\t') {
++start;
}
if (*start == '\0') {
*cursor = NULL;
return NULL;
}
end = start;
while (*end != '\0' && *end != ',') {
++end;
}
if (*end == ',') {
*end = '\0';
*cursor = end + 1;
} else {
*cursor = NULL;
}
trim_trailing(start);
return start;
}
static void set_link_defaults(void)
{
static const uint8_t zero_ip[4] = {0u, 0u, 0u, 0u};
static const uint8_t c1_ip[4] = {192u, 168u, 1u, 200u};
static const uint8_t c2_ip[4] = {192u, 168u, 1u, 201u};
memset(g_config.links, 0, sizeof(g_config.links));
g_config.links[CONFIG_LINK_S1].enabled = 1u;
g_config.links[CONFIG_LINK_S1].uart = LINK_UART_U0;
g_config.links[CONFIG_LINK_S1].local_port = 8080u;
memcpy(g_config.links[CONFIG_LINK_S1].remote_ip, zero_ip, sizeof(zero_ip));
g_config.links[CONFIG_LINK_S2].enabled = 0u;
g_config.links[CONFIG_LINK_S2].uart = LINK_UART_U1;
g_config.links[CONFIG_LINK_S2].local_port = 8081u;
memcpy(g_config.links[CONFIG_LINK_S2].remote_ip, zero_ip, sizeof(zero_ip));
g_config.links[CONFIG_LINK_C1].enabled = 1u;
g_config.links[CONFIG_LINK_C1].uart = LINK_UART_U1;
g_config.links[CONFIG_LINK_C1].local_port = 9001u;
memcpy(g_config.links[CONFIG_LINK_C1].remote_ip, c1_ip, sizeof(c1_ip));
g_config.links[CONFIG_LINK_C1].remote_port = 9000u;
g_config.links[CONFIG_LINK_C2].enabled = 0u;
g_config.links[CONFIG_LINK_C2].uart = LINK_UART_U0;
g_config.links[CONFIG_LINK_C2].local_port = 9002u;
memcpy(g_config.links[CONFIG_LINK_C2].remote_ip, c2_ip, sizeof(c2_ip));
g_config.links[CONFIG_LINK_C2].remote_port = 9001u;
}
static void migrate_legacy_config(const legacy_device_config_v2_t *legacy)
{
config_set_defaults();
memcpy(g_config.net.mac, legacy->mac, sizeof(g_config.net.mac));
memcpy(g_config.net.ip, legacy->ip, sizeof(g_config.net.ip));
memcpy(g_config.net.mask, legacy->mask, sizeof(g_config.net.mask));
memcpy(g_config.net.gw, legacy->gw, sizeof(g_config.net.gw));
g_config.uart_baudrate[0] = legacy->uart2_baudrate;
g_config.uart_baudrate[1] = legacy->uart3_baudrate;
g_config.mux_mode = MUX_MODE_RAW;
g_config.links[CONFIG_LINK_S1].enabled = (legacy->server_port != 0u) ? 1u : 0u;
g_config.links[CONFIG_LINK_S1].uart = LINK_UART_U0;
g_config.links[CONFIG_LINK_S1].local_port = legacy->server_port;
memset(g_config.links[CONFIG_LINK_S1].remote_ip, 0, sizeof(g_config.links[CONFIG_LINK_S1].remote_ip));
g_config.links[CONFIG_LINK_S1].remote_port = 0u;
g_config.links[CONFIG_LINK_S2].enabled = 0u;
g_config.links[CONFIG_LINK_C1].enabled = (legacy->remote_port != 0u) ? 1u : 0u;
g_config.links[CONFIG_LINK_C1].uart = LINK_UART_U1;
g_config.links[CONFIG_LINK_C1].local_port = 8081u;
memcpy(g_config.links[CONFIG_LINK_C1].remote_ip, legacy->remote_ip, sizeof(g_config.links[CONFIG_LINK_C1].remote_ip));
g_config.links[CONFIG_LINK_C1].remote_port = legacy->remote_port;
g_config.links[CONFIG_LINK_C2].enabled = 0u;
g_config.crc = config_calc_crc(&g_config);
}
static bool try_load_legacy_config(void)
{
legacy_device_config_v2_t legacy;
uint32_t expected_crc;
if (flash_param_read(&legacy, sizeof(legacy)) != 0) {
return false;
}
expected_crc = flash_param_crc32(&legacy, offsetof(legacy_device_config_v2_t, crc));
if (legacy.magic != CONFIG_MAGIC || legacy.version != 0x0002u || legacy.crc != expected_crc) {
return false;
}
migrate_legacy_config(&legacy);
return true;
}
static at_result_t handle_summary_query(char *response, uint16_t max_len)
{
char ip_str[16];
char mask_str[16];
char gw_str[16];
char mac_str[18];
char rip_str[CONFIG_LINK_COUNT][16];
config_ip_to_str(g_config.net.ip, ip_str);
config_ip_to_str(g_config.net.mask, mask_str);
config_ip_to_str(g_config.net.gw, gw_str);
config_mac_to_str(g_config.net.mac, mac_str);
for (uint32_t i = 0; i < CONFIG_LINK_COUNT; ++i) {
config_ip_to_str(g_config.links[i].remote_ip, rip_str[i]);
}
snprintf(response, max_len,
"+NET:IP=%s,MASK=%s,GW=%s,MAC=%s\r\n"
"+LINK:0,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\n"
"+LINK:1,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\n"
"+LINK:2,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\n"
"+LINK:3,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\n"
"+MUX:%u\r\n"
"+MAP:UART2=0x04,UART3=0x08,C1=0x01,C2=0x02,S1=0x10,S2=0x20\r\n"
"+BAUD:U0=%lu,U1=%lu\r\n"
"OK\r\n",
ip_str, mask_str, gw_str, mac_str,
g_config.links[0].enabled, g_config.links[0].local_port, rip_str[0], g_config.links[0].remote_port, link_uart_to_str(g_config.links[0].uart),
g_config.links[1].enabled, g_config.links[1].local_port, rip_str[1], g_config.links[1].remote_port, link_uart_to_str(g_config.links[1].uart),
g_config.links[2].enabled, g_config.links[2].local_port, rip_str[2], g_config.links[2].remote_port, link_uart_to_str(g_config.links[2].uart),
g_config.links[3].enabled, g_config.links[3].local_port, rip_str[3], g_config.links[3].remote_port, link_uart_to_str(g_config.links[3].uart),
g_config.mux_mode,
g_config.uart_baudrate[0],
g_config.uart_baudrate[1]);
return AT_OK;
}
static at_result_t handle_net_query(char *response, uint16_t max_len)
{
char ip_str[16];
char mask_str[16];
char gw_str[16];
char mac_str[18];
config_ip_to_str(g_config.net.ip, ip_str);
config_ip_to_str(g_config.net.mask, mask_str);
config_ip_to_str(g_config.net.gw, gw_str);
config_mac_to_str(g_config.net.mac, mac_str);
snprintf(response, max_len, "+NET:IP=%s,MASK=%s,GW=%s,MAC=%s\r\nOK\r\n", ip_str, mask_str, gw_str, mac_str);
return AT_OK;
}
static at_result_t handle_link_query(uint32_t index, char *response, uint16_t max_len)
{
char rip_str[16];
if (index >= CONFIG_LINK_COUNT) {
snprintf(response, max_len, "ERROR: Invalid route field\r\n");
return AT_INVALID_PARAM;
}
config_ip_to_str(g_config.links[index].remote_ip, rip_str);
snprintf(response,
max_len,
"+LINK:%lu,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\nOK\r\n",
index,
g_config.links[index].enabled,
g_config.links[index].local_port,
rip_str,
g_config.links[index].remote_port,
link_uart_to_str(g_config.links[index].uart));
return AT_OK;
}
static at_result_t handle_all_link_query(char *response, uint16_t max_len)
{
char rip_str[CONFIG_LINK_COUNT][16];
for (uint32_t i = 0; i < CONFIG_LINK_COUNT; ++i) {
config_ip_to_str(g_config.links[i].remote_ip, rip_str[i]);
}
snprintf(response,
max_len,
"+LINK:0,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\n"
"+LINK:1,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\n"
"+LINK:2,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\n"
"+LINK:3,EN=%u,LPORT=%u,RIP=%s,RPORT=%u,UART=%s\r\n"
"OK\r\n",
g_config.links[0].enabled, g_config.links[0].local_port, rip_str[0], g_config.links[0].remote_port, link_uart_to_str(g_config.links[0].uart),
g_config.links[1].enabled, g_config.links[1].local_port, rip_str[1], g_config.links[1].remote_port, link_uart_to_str(g_config.links[1].uart),
g_config.links[2].enabled, g_config.links[2].local_port, rip_str[2], g_config.links[2].remote_port, link_uart_to_str(g_config.links[2].uart),
g_config.links[3].enabled, g_config.links[3].local_port, rip_str[3], g_config.links[3].remote_port, link_uart_to_str(g_config.links[3].uart));
return AT_OK;
}
int config_init(void)
{
flash_param_init();
return config_load();
}
int config_load(void)
{
if (flash_param_read(&g_config, sizeof(g_config)) == 0 &&
g_config.magic == CONFIG_MAGIC &&
g_config.version == CONFIG_VERSION &&
g_config.crc == config_calc_crc(&g_config)) {
return 0;
}
if (try_load_legacy_config()) {
return 0;
}
config_set_defaults();
return -1;
}
int config_save(void)
{
g_config.magic = CONFIG_MAGIC;
g_config.version = CONFIG_VERSION;
g_config.crc = config_calc_crc(&g_config);
return flash_param_write(&g_config, sizeof(g_config));
}
void config_set_defaults(void)
{
const uint8_t default_ip[] = DEFAULT_NET_IP;
const uint8_t default_mask[] = DEFAULT_NET_MASK;
const uint8_t default_gw[] = DEFAULT_NET_GW;
const uint8_t default_mac[] = DEFAULT_NET_MAC;
memset(&g_config, 0, sizeof(g_config));
g_config.magic = CONFIG_MAGIC;
g_config.version = CONFIG_VERSION;
g_config.mux_mode = MUX_MODE_RAW;
memcpy(g_config.net.ip, default_ip, sizeof(g_config.net.ip));
memcpy(g_config.net.mask, default_mask, sizeof(g_config.net.mask));
memcpy(g_config.net.gw, default_gw, sizeof(g_config.net.gw));
memcpy(g_config.net.mac, default_mac, sizeof(g_config.net.mac));
set_link_defaults();
g_config.uart_baudrate[0] = DEFAULT_UART_BAUDRATE;
g_config.uart_baudrate[1] = DEFAULT_UART_BAUDRATE;
g_config.crc = config_calc_crc(&g_config);
}
const device_config_t *config_get(void)
{
return &g_config;
}
device_config_t *config_get_mutable(void)
{
return &g_config;
}
at_result_t config_process_at_cmd(const char *cmd, char *response, uint16_t max_len)
{
const char *value;
const char *p;
if (cmd == NULL || response == NULL || max_len == 0u) {
return AT_ERROR;
}
strncpy(g_cmd_work_buffer, cmd, sizeof(g_cmd_work_buffer) - 1u);
g_cmd_work_buffer[sizeof(g_cmd_work_buffer) - 1u] = '\0';
trim_trailing(g_cmd_work_buffer);
p = skip_whitespace(g_cmd_work_buffer);
if ((p[0] != 'A' && p[0] != 'a') || (p[1] != 'T' && p[1] != 't')) {
snprintf(response, max_len, "ERROR: Unknown command\r\n");
return AT_UNKNOWN_CMD;
}
if (p[2] == '\0') {
snprintf(response, max_len, "OK\r\n");
return AT_OK;
}
if (p[2] != '+') {
snprintf(response, max_len, "ERROR: Unknown command\r\n");
return AT_UNKNOWN_CMD;
}
p += 3;
if ((equals_ignore_case(p, "?") || equals_ignore_case(p, "QUERY"))) {
return handle_summary_query(response, max_len);
}
if (equals_ignore_case(p, "SAVE")) {
if (config_save() != 0) {
snprintf(response, max_len, "ERROR: Save failed\r\n");
return AT_SAVE_FAILED;
}
snprintf(response, max_len, "OK: Configuration saved\r\n");
return AT_OK;
}
if (equals_ignore_case(p, "RESET")) {
g_reset_requested = true;
snprintf(response, max_len, "OK: Resetting...\r\n");
return AT_OK;
}
if (equals_ignore_case(p, "DEFAULT")) {
config_set_defaults();
snprintf(response, max_len, "OK: Defaults restored\r\n");
return AT_OK;
}
if (equals_ignore_case(p, "MUX?")) {
snprintf(response, max_len, "+MUX:%u\r\nOK\r\n", g_config.mux_mode);
return AT_OK;
}
if (parse_command_with_value(p, "MUX", &value)) {
uint32_t mux_value;
if (parse_u32_value(value, 0u, 1u, &mux_value) != 0) {
snprintf(response, max_len, "ERROR: Invalid value\r\n");
return AT_INVALID_PARAM;
}
g_config.mux_mode = (uint8_t)mux_value;
snprintf(response, max_len, "OK\r\n");
return AT_NEED_REBOOT;
}
if (equals_ignore_case(p, "NET?")) {
return handle_net_query(response, max_len);
}
if (parse_command_with_value(p, "NET", &value)) {
char value_copy[96];
char *token;
char *cursor;
uint8_t ip[4];
uint8_t mask[4];
uint8_t gw[4];
uint8_t mac[6];
strncpy(value_copy, value, sizeof(value_copy) - 1u);
value_copy[sizeof(value_copy) - 1u] = '\0';
cursor = value_copy;
token = config_next_token(&cursor);
if (token == NULL || config_str_to_ip(token, ip) != 0) {
snprintf(response, max_len, "ERROR: Invalid IP format\r\n");
return AT_INVALID_PARAM;
}
token = config_next_token(&cursor);
if (token == NULL || config_str_to_ip(token, mask) != 0) {
snprintf(response, max_len, "ERROR: Invalid mask format\r\n");
return AT_INVALID_PARAM;
}
token = config_next_token(&cursor);
if (token == NULL || config_str_to_ip(token, gw) != 0) {
snprintf(response, max_len, "ERROR: Invalid gateway format\r\n");
return AT_INVALID_PARAM;
}
token = config_next_token(&cursor);
if (token == NULL || config_str_to_mac(token, mac) != 0) {
snprintf(response, max_len, "ERROR: Invalid MAC format\r\n");
return AT_INVALID_PARAM;
}
if (config_next_token(&cursor) != NULL) {
snprintf(response, max_len, "ERROR: Invalid value\r\n");
return AT_INVALID_PARAM;
}
memcpy(g_config.net.ip, ip, sizeof(ip));
memcpy(g_config.net.mask, mask, sizeof(mask));
memcpy(g_config.net.gw, gw, sizeof(gw));
memcpy(g_config.net.mac, mac, sizeof(mac));
snprintf(response, max_len, "OK\r\n");
return AT_NEED_REBOOT;
}
if (equals_ignore_case(p, "LINK?")) {
return handle_all_link_query(response, max_len);
}
if (parse_command_with_value(p, "LINK", &value)) {
char value_copy[96];
char *cursor;
char *token;
uint32_t index;
uint32_t enabled;
uint32_t local_port;
uint32_t remote_port;
uint8_t rip[4];
uint8_t uart;
strncpy(value_copy, value, sizeof(value_copy) - 1u);
value_copy[sizeof(value_copy) - 1u] = '\0';
cursor = value_copy;
token = config_next_token(&cursor);
if (token == NULL || parse_u32_value(token, 0u, CONFIG_LINK_COUNT - 1u, &index) != 0) {
snprintf(response, max_len, "ERROR: Invalid route field\r\n");
return AT_INVALID_PARAM;
}
token = config_next_token(&cursor);
if (token == NULL) {
return handle_link_query(index, response, max_len);
}
if (parse_u32_value(token, 0u, 1u, &enabled) != 0) {
snprintf(response, max_len, "ERROR: Invalid value\r\n");
return AT_INVALID_PARAM;
}
token = config_next_token(&cursor);
if (token == NULL || parse_u32_value(token, 1u, 65535u, &local_port) != 0) {
snprintf(response, max_len, "ERROR: Invalid port\r\n");
return AT_INVALID_PARAM;
}
token = config_next_token(&cursor);
if (token == NULL || config_str_to_ip(token, rip) != 0) {
snprintf(response, max_len, "ERROR: Invalid remote IP format\r\n");
return AT_INVALID_PARAM;
}
token = config_next_token(&cursor);
if (token == NULL || parse_u32_value(token, 0u, 65535u, &remote_port) != 0) {
snprintf(response, max_len, "ERROR: Invalid port\r\n");
return AT_INVALID_PARAM;
}
token = config_next_token(&cursor);
if (token == NULL || parse_link_uart(token, &uart) != 0) {
snprintf(response, max_len, "ERROR: Invalid route field\r\n");
return AT_INVALID_PARAM;
}
if (config_next_token(&cursor) != NULL) {
snprintf(response, max_len, "ERROR: Invalid value\r\n");
return AT_INVALID_PARAM;
}
g_config.links[index].enabled = (uint8_t)enabled;
g_config.links[index].local_port = (uint16_t)local_port;
memcpy(g_config.links[index].remote_ip, rip, sizeof(rip));
g_config.links[index].remote_port = (uint16_t)remote_port;
g_config.links[index].uart = uart;
snprintf(response, max_len, "OK\r\n");
return AT_NEED_REBOOT;
}
snprintf(response, max_len, "ERROR: Unknown command\r\n");
return AT_UNKNOWN_CMD;
}
void config_ip_to_str(const uint8_t *ip, char *str)
{
sprintf(str, "%u.%u.%u.%u", ip[0], ip[1], ip[2], ip[3]);
}
int config_str_to_ip(const char *str, uint8_t *ip)
{
int a;
int b;
int c;
int d;
if (sscanf(str, "%d.%d.%d.%d", &a, &b, &c, &d) != 4) {
return -1;
}
if (a < 0 || a > 255 || b < 0 || b > 255 || c < 0 || c > 255 || d < 0 || d > 255) {
return -1;
}
ip[0] = (uint8_t)a;
ip[1] = (uint8_t)b;
ip[2] = (uint8_t)c;
ip[3] = (uint8_t)d;
return 0;
}
void config_mac_to_str(const uint8_t *mac, char *str)
{
sprintf(str, "%02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
}
int config_str_to_mac(const char *str, uint8_t *mac)
{
int a[6];
if (sscanf(str, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6 &&
sscanf(str, "%x-%x-%x-%x-%x-%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) {
return -1;
}
for (int i = 0; i < 6; ++i) {
if (a[i] < 0 || a[i] > 255) {
return -1;
}
mac[i] = (uint8_t)a[i];
}
return 0;
}
void config_poll(void)
{
if (g_pending_cmd_ready) {
uint16_t len = g_pending_cmd_len;
g_pending_cmd_ready = false;
g_pending_cmd_len = 0u;
(void)config_try_process_frame((const uint8_t *)g_pending_cmd_buffer, len);
}
}
void config_uart_rx_byte(uint8_t byte)
{
if (byte == '\r') {
g_uart_rx_seen_cr = true;
return;
}
if (byte == '\n') {
if (g_uart_rx_seen_cr && g_uart_cmd_len > 0u) {
if (!g_pending_cmd_ready) {
memcpy(g_pending_cmd_buffer, g_uart_cmd_buffer, g_uart_cmd_len);
g_pending_cmd_buffer[g_uart_cmd_len] = '\0';
g_pending_cmd_len = g_uart_cmd_len;
g_pending_cmd_ready = true;
}
g_uart_cmd_len = 0u;
}
g_uart_rx_seen_cr = false;
return;
}
if (g_uart_rx_seen_cr) {
g_uart_cmd_len = 0u;
g_uart_rx_seen_cr = false;
}
if (g_uart_cmd_len < (CONFIG_CMD_MAX_LEN - 1u)) {
g_uart_cmd_buffer[g_uart_cmd_len++] = byte;
g_uart_cmd_buffer[g_uart_cmd_len] = '\0';
} else {
g_uart_cmd_len = 0u;
}
}
bool config_build_response_frame(const uint8_t *data,
uint16_t len,
char *response,
uint16_t max_len,
at_result_t *result)
{
if (data == NULL || response == NULL || len < 2u || max_len == 0u) {
return false;
}
if (len >= CONFIG_CMD_MAX_LEN) {
return false;
}
memcpy(g_cmd_parse_buffer, data, len);
g_cmd_parse_buffer[len] = '\0';
if (((g_cmd_parse_buffer[0] != 'A') && (g_cmd_parse_buffer[0] != 'a')) ||
((g_cmd_parse_buffer[1] != 'T') && (g_cmd_parse_buffer[1] != 't'))) {
return false;
}
*result = config_process_at_cmd(g_cmd_parse_buffer, response, max_len);
return true;
}
bool config_try_process_frame(const uint8_t *data, uint16_t len)
{
at_result_t result = AT_ERROR;
if (!config_build_response_frame(data, len, g_at_response_buffer, sizeof(g_at_response_buffer), &result)) {
return false;
}
if (HAL_UART_Transmit(&CONFIG_UART_HANDLE,
(uint8_t *)g_at_response_buffer,
(uint16_t)strlen(g_at_response_buffer),
1000u) != HAL_OK) {
return false;
}
if (result == AT_NEED_REBOOT) {
static const char hint[] = "Note: Use AT+SAVE then AT+RESET to apply changes\r\n";
if (HAL_UART_Transmit(&CONFIG_UART_HANDLE,
(uint8_t *)hint,
sizeof(hint) - 1u,
1000u) != HAL_OK) {
return false;
}
}
return true;
}
bool config_is_reset_requested(void)
{
return g_reset_requested;
}
void config_clear_reset_requested(void)
{
g_reset_requested = false;
}
uint8_t config_link_index_to_endpoint(uint8_t index)
{
switch (index) {
case CONFIG_LINK_S1:
return ENDPOINT_S1;
case CONFIG_LINK_S2:
return ENDPOINT_S2;
case CONFIG_LINK_C1:
return ENDPOINT_C1;
case CONFIG_LINK_C2:
return ENDPOINT_C2;
default:
return 0u;
}
}
uint8_t config_uart_index_to_endpoint(uint8_t uart_index)
{
return (uart_index == LINK_UART_U1) ? ENDPOINT_UART3 : ENDPOINT_UART2;
}
bool config_endpoint_is_single(uint8_t endpoint)
{
return endpoint == ENDPOINT_C1 || endpoint == ENDPOINT_C2 ||
endpoint == ENDPOINT_UART2 || endpoint == ENDPOINT_UART3 ||
endpoint == ENDPOINT_S1 || endpoint == ENDPOINT_S2;
}
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