一、前言
本篇将描述泰凌微BLE作为主机,调用写入命令API,发送数据给到芯科BLE芯片。
二、阅读说明
1、泰凌微芯片开发学习者。2、芯科芯片开发学习者。3、蓝牙 spec学习者。
三、正文
1、使用的demo
泰凌芯片:ble_master_kma_dongle
芯科芯片:Bluetooth - SoC Blinky
2、连接参数更新请求API
/*** @brief for user to start update parameter process in master role .* Please refer to BLE Core Specification: Vol 4, Part E, 7.8.18 for more information to understand the meaning of each parameters and* the return values.* @param[in] connHandle - connect handle* @param[in] conn_min - minimum connection interval* @param[in] conn_max - maximum connection interval* @param[in] conn_latency - connection latency* @param[in] timeout - connection timeout* @param[in] ce_min - not supported* @param[in] ce_max - not supported* @return status, 0x00: succeed* other: failed*/ble_sts_t blm_ll_updateConnection (u16 connHandle,u16 conn_min, u16 conn_max, u16 conn_latency, u16 timeout,u16 ce_min, u16 ce_max );
3、编写代码
void mater_change_connect_para(){static u32 time_count = 0;static u8 flg = 0;if(blc_ll_getCurrentState() == BLS_LINK_STATE_CONN){if((flg == 0) && clock_time_exceed(time_count, 3000000)){flg = 1;ble_sts_t state = blm_ll_updateConnection(BLM_CONN_HANDLE,CONN_INTERVAL_10MS, CONN_INTERVAL_10MS, 0, CONN_TIMEOUT_4S,0, 0);if(state == 0)printf("connect para update successn");elseprintf("connect para update failn");}}}
上述函数的功能为,当主机和从机连接完成之后,延时3s后发送连接更新请求指令。将mater_change_connect_para()函数放到主循环中:
4、打印结果
如上所示调用连接参数更新成功。
五、结尾
本篇的讲解了更新连接参数API。
阅读全文
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