hello-world.c

#include "include.h"



/*
{
  "method":"helloworld.onoff",
    "params":"on"/"off"
}
*/
//非常典型的一个“委托接口”函数，可以被外部程序通过 json rpc 方式调用

int JSON_RPC(onoff)(jsmn_node_t* pjn, fp_json_delegate_ack ack, void* ctx)  

//使用JSON_RPC宏包裹的函数名就可以被wifi.io的http接口调用，同时也可以被本地http接口调用

{
    int ret = STATE_OK;
    char* err_msg = NULL;
    char onoff_msg[32];

    //下面从json中提取 param 字符串
    if(JSMN_STRING != pjn->tkn->type || 
         STATE_OK != jsmn.tkn2val_str(pjn->js, pjn->tkn, onoff_msg, sizeof(onoff_msg), NULL)){  //pjn->tkn 指向json中params字段的名值对，使用tkn2val_str()从中提取string类型的value

        ret = STATE_ERROR;  
        err_msg = "Params error."; 
        LOG_WARN("mirror:%s.\r\n", err_msg);
        goto exit_err;
    }


    //这里正确的得到了字符串，放置在 onoff_msg 中
    if(0 == _strcmp("on", onoff_msg)){
        api_io.high(WIFIIO_GPIO_01);
        api_io.high(WIFIIO_GPIO_02);
    }

    else if(0 == _strcmp("off", onoff_msg)){
        api_io.low(WIFIIO_GPIO_01);
        api_io.low(WIFIIO_GPIO_02);
    }


    if(ack)jsmn.delegate_ack_result(ack, ctx, ret);
    return ret;

exit_err:
    if(ack)jsmn.delegate_ack_err(ack, ctx, ret, err_msg);
    return ret;
}





int main(int argc, char* argv[])
{
    int n;
    api_io.init(WIFIIO_GPIO_01, OUT_PUSH_PULL);
    api_io.init(WIFIIO_GPIO_02, OUT_PUSH_PULL);
    api_io.low(WIFIIO_GPIO_01);
    api_io.high(WIFIIO_GPIO_02);

    n = 0;
    while(n++ < 15)
    {
        api_os.tick_sleep(1000);

        api_io.toggle(WIFIIO_GPIO_01);
        api_io.toggle(WIFIIO_GPIO_02);

    }

    return ADDON_LOADER_GRANTED;

//err_exit:
    return ADDON_LOADER_ABORT;      //release 
}