195 lines
6.0 KiB
C
195 lines
6.0 KiB
C
/* ble_at.c - HLK-B40 蓝牙透传模块 AT 配置
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*
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* 接线：模块 PC5(功能按键输入) 接单片机 PB0。
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* 进 AT 模式：PB0 拉低 1s 后释放（手册要求 0.5~3s）；
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* 回透传模式：AT 模式下发送 AT+TS=1。
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* 上电默认透传模式。
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*/
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#include "ble_at.h"
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#include "uart.h"
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#include "log.h"
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#include "main.h"
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#include "system.h"
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#include "24c02.h"
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#include "stdio.h"
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#include "string.h"
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#define BLE_PC5_PORT GPIOB
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#define BLE_PC5_PIN GPIO_PIN_0
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#define BLE_PC5_LOW() HAL_GPIO_WritePin(BLE_PC5_PORT, BLE_PC5_PIN, GPIO_PIN_RESET)
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#define BLE_PC5_HIGH() HAL_GPIO_WritePin(BLE_PC5_PORT, BLE_PC5_PIN, GPIO_PIN_SET)
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/* EEPROM 缓存区：已配置好的蓝牙名（132~157，26B，避开其它占用） */
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#define BLE_CACHE_ADDR 132
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#define BLE_POWER_ADDR 158 /* EEPROM：已配置的发射功率（132~157 名称缓存, 160 日志等级） */
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#define BLE_CACHE_LEN 26
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/* PB0 开漏输出：释放时由模块 PC5 内部上拉保持高电平 */
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void ble_at_init(void)
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{
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GPIO_InitTypeDef g = {0};
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__HAL_RCC_GPIOB_CLK_ENABLE();
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BLE_PC5_HIGH();
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g.Pin = BLE_PC5_PIN;
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g.Mode = GPIO_MODE_OUTPUT_OD;
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g.Pull = GPIO_NOPULL;
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g.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(BLE_PC5_PORT, &g);
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BLE_PC5_HIGH();
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}
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static void ble_delay(uint32_t ms)
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{
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while (ms >= 100) {
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HAL_Delay(100);
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IWDG_Feed();
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ms -= 100;
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}
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if (ms) HAL_Delay(ms);
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}
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/* 清空 USART1 待处理行 */
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static void ble_flush_rx(void)
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{
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while (USART1_GetCommand() != NULL) { }
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}
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/* 发送 AT 命令并等待期望应答（按行匹配子串），0=成功 */
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static int ble_at_cmd(const char *cmd, const char *expect, int timeout_ms)
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{
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char line[64];
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int n = snprintf(line, sizeof(line), "%s\r\n", cmd);
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ble_flush_rx();
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HAL_UART_Transmit(&huart1, (uint8_t *)line, n, 500);
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int t = timeout_ms / 50;
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while (t-- > 0) {
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ble_delay(50);
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const char *resp = USART1_GetCommand();
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if (resp) {
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if (strstr(resp, expect)) {
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log_info("> BLE AT: %s", resp);
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return 0;
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}
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if (strstr(resp, "ERROR")) {
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log_warn("> BLE AT 应答错误: %s", resp);
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return -1;
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}
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}
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}
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log_warn("> BLE AT 超时: %s", cmd);
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return -1;
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}
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/* 上电执行一次：进 AT 模式 → 蓝牙名称查询/设置为 BLE_NAME → 需要时重启模块生效。
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* 先查询后设置：名字已正确则整个流程跳过（不留 AT 窗口，避免 APP 数据撞进 AT 命令） */
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void ble_setup_name(void)
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{
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char cmd[48];
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/* EEPROM 缓存命中（名称+功率都对）则跳过整个 AT 流程（零窗口，蓝牙 APP 不断联） */
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char cache[BLE_CACHE_LEN] = {0};
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eepromReadData(BLE_CACHE_ADDR, cache, BLE_CACHE_LEN);
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cache[BLE_CACHE_LEN - 1] = 0;
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uint8_t pwr_cache = 0xFF;
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eepromReadData(BLE_POWER_ADDR, &pwr_cache, 1);
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if (strcmp(cache, BLE_NAME) == 0 && pwr_cache == BLE_TX_POWER) {
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log_info("> BLE: 配置已缓存(%s/功率%d)，跳过设置", BLE_NAME, BLE_TX_POWER);
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return;
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}
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/* AT 窗口内静音日志：UART1 与模块共用，日志字节会污染模块的 AT 命令解析 */
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log_mute(1);
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/* 进 AT 模式并查询当前名称：无应答则重新拉 PC5 再试，最多 3 轮 */
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const char *cur = NULL;
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for (int round = 0; round < 3 && !cur; round++) {
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BLE_PC5_LOW();
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ble_delay(1100); /* 拉低 1s 进 AT 模式 */
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BLE_PC5_HIGH();
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ble_delay(600); /* 等模块切换到 AT 模式 */
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ble_flush_rx();
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HAL_UART_Transmit(&huart1, (uint8_t *)"AT+NAME=?\r\n", 12, 500);
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int t = 30;
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while (t-- > 0 && !cur) {
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ble_delay(50);
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cur = USART1_GetCommand();
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}
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}
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if (!cur) {
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log_mute(0);
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log_warn("> BLE: 3 轮 AT 均无应答（模块未接/被手机占用/PC5 未拉低）");
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return;
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}
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if (strstr(cur, BLE_NAME) && pwr_cache == BLE_TX_POWER) {
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/* 名称与功率都正确：直接回透传，不动任何设置 */
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ble_at_cmd("AT+TS=1", "OK", 1500);
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log_mute(0);
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log_info("> BLE: 名称已是 %s，无需设置", BLE_NAME);
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return;
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}
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if (strstr(cur, BLE_NAME)) {
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/* 名称对但功率变了：只重设发射功率 */
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snprintf(cmd, sizeof(cmd), "AT+RFPOWER=%d", BLE_TX_POWER);
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ble_at_cmd(cmd, "OK", 1500);
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ble_at_cmd("AT+REBOOT=1", "OK", 1500);
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uint8_t p = BLE_TX_POWER;
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eepromWriteData(BLE_POWER_ADDR, &p, 1);
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log_mute(0);
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log_info("> BLE: 发射功率已设置为 %d", BLE_TX_POWER);
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return;
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}
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/* 需要设置：发 AT+NAME（最多重试 3 次）。
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* 注意：本模块设置类参数重启后才生效，当场回查查到的仍是旧名，
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* 不能用作校验——改完直接重启，下次开机的查询才是真正的校验 */
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int ok = -1;
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for (int i = 0; i < 3 && ok != 0; i++) {
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snprintf(cmd, sizeof(cmd), "AT+NAME=%s", BLE_NAME);
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ok = ble_at_cmd(cmd, "OK", 1500);
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}
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if (ok == 0) {
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#if BLE_UUID_CUSTOM
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/* 顺带设置透传 GATT UUID（FFE0/FFE1），通用 BLE 串口 APP 可连 */
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snprintf(cmd, sizeof(cmd), "AT+UUIDS=%s", BLE_UUID_SERVICE);
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ble_at_cmd(cmd, "OK", 1500);
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snprintf(cmd, sizeof(cmd), "AT+UUIDR=%s", BLE_UUID_TX);
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ble_at_cmd(cmd, "OK", 1500);
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snprintf(cmd, sizeof(cmd), "AT+UUIDW=%s", BLE_UUID_RX);
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ble_at_cmd(cmd, "OK", 1500);
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#endif
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/* 顺带设置发射功率 */
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snprintf(cmd, sizeof(cmd), "AT+RFPOWER=%d", BLE_TX_POWER);
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ble_at_cmd(cmd, "OK", 1500);
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/* 手册说明：设置类参数重启后才生效，重启模块使新名称生效；
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* 模块重启后默认就是透传模式，无需再发 AT+TS=1 */
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for (int i = 0; i < 2; i++) {
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if (ble_at_cmd("AT+REBOOT=1", "OK", 1500) == 0) break;
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}
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eepromWriteData(BLE_CACHE_ADDR, (void *)BLE_NAME, strlen(BLE_NAME) + 1);
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{
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uint8_t p = BLE_TX_POWER;
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eepromWriteData(BLE_POWER_ADDR, &p, 1);
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}
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log_mute(0);
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log_info("> BLE: 名称/UUID/功率已设置完成");
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} else {
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ble_at_cmd("AT+TS=1", "OK", 1500); /* 确保回到透传 */
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log_mute(0);
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log_warn("> BLE: 设置名称失败（模块未接或应答异常）");
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}
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}
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/* 强制重新执行蓝牙设置（蓝牙 BLESET 命令触发）：清缓存后重跑 */
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void ble_force_setup(void)
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{
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eepromWriteData(BLE_CACHE_ADDR, "", 1);
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ble_setup_name();
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}
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