#include "bsp_SysTick.h"
#include "bsp_usart1.h"
#include "bsp_usart3.h"
#include "sim900a.h"
char ime[16];//IMEI串号
char ccid[20];//CCID号码
char csq;//CSQ
发送命令
/**
* @brief sim900a_cmd 发送命令
* @param cmd：命令字符串指针，reply：希望得到的命令响应，waittime：命令等待的时间
* @retval 命令是否得到正常响应，正常：SIM900A_TRUE，不正常：SIM900A_FALSE
*/
uint8_t sim900a_cmd(char *cmd, char *reply,uint32_t waittime )
{
SIM900A_CLEAN_RX(); //清空了接收缓冲区数据
SIM900A_TX(cmd); //发送命令
if(reply == 0) //不需要接收数据
return SIM900A_TRUE;
SIM900A_DELAY(waittime); //延时
return sim900a_cmd_check(reply); //对接收数据进行处理
}
检测响应
/**
* @brief sim900a_cmd_check 检测命令的响应
* @param reply命令响应的字符串指针
* @retval 检测到匹配的响应SIM900A_TRUE，没检测到匹配的响应SIM900A_FALSE
*/
sim900a_res_e sim900a_cmd_check(char *reply)
{
char *redata;
redata = SIM900A_RX(); //接收数据
if(strstr(redata,reply) != NULL)
{
SIM900A_CLEAN_RX();
return SIM900A_TRUE; //查找到匹配的响应内容
}
else
{
SIM900A_CLEAN_RX();
return SIM900A_FALSE;
}
}
等待应答
/**
* @brief sim900a_waitask 等待数据应答
* @param waitask_hook，检测事件勾子函数，若产生事件，退出本函数。
* @retval 接收到的应答数据指针
*/
char * sim900a_waitask(uint8_t waitask_hook(void)) //等待有数据应答
{
uint8_t len;
char *redata;
do{
redata = SIM900A_RX_LEN(len); //接收数据
if(waitask_hook!=0)
{
if(waitask_hook()==SIM900A_TRUE) //返回 SIM900A_TRUE 表示检测到事件，需要退出
{
redata = 0;
return redata;
}
}
}while(len==0); //接收数据为0时一直等待
SIM900A_DELAY(20); //延时，确保能接收到全部数据（115200波特率下，每ms能接收11.52个字节）
return redata;
}
获取号码
/**
* @brief sim900a_cnum
* @param num:存储本机号码的指针
* @retval 返回SIM900A_FALSE表示获取失败，返回SIM900A_TRUE表示成功
*/
uint8_t sim900a_cnum(char *num)
{
char *redata;
uint8_t len;
if(sim900a_cmd("AT+CNUM\r","OK", 1000) != SIM900A_TRUE)
{
return SIM900A_FALSE;
}
redata = SIM900A_RX(); //接收数据
if(len == 0)
{
return SIM900A_FALSE;
}
//第一个逗号后面的数据为:"本机号码"
while(*redata != ',')
{
len--;
if(len==0)
{
return SIM900A_FALSE;
}
redata++;
}
redata+=2;
while(*redata != '"')
{
*num++ = *redata++;
}
*num = 0; //字符串结尾需要清0
return SIM900A_TRUE;
}
GPRS初始化
/**
* @brief sim900a_gprs_init GPRS¹¦Äܳõʼ»¯
* @param ÎÞ
* @retval ÎÞ
*/
void sim900a_gprs_init(void)
{
sim900a_tx_printf("AT+CGCLASS=\"B\"\r"); //设置移动台类别为"B"
SIM900A_DELAY(100);
sim900a_tx_printf("AT+CGDCONT=1,\"IP\",\"CMNET\"\r"); //PDP上下文标识1，互联网协议，接入点名称：CMNET
SIM900A_DELAY(100);
sim900a_tx_printf("AT+CGATT=1\r"); //附着 GPRS 网络
SIM900A_DELAY(100);
printf(SIM900A_RX());
SIM900A_CLEAN_RX();
}
建立TCP连接
/**
* @brief sim900a_gprs_tcp_link 建立TCP连接
* @param 无
* @retval 无
*/
sim900a_res_e sim900a_gprs_tcp_link(char * serverip,char * serverport)
{
SIM900A_CLEAN_RX();
sim900a_tx_printf("AT+CIPSTART=\"TCP\",\"%s\",\"%s\"\r",serverip,serverport);
Delay_ms(2000);//延时
printf(SIM900A_RX());//输出返回信息
if (sim900a_cmd_check("CONNECT OK") == SIM900A_TRUE)//连接成功
{
SIM900A_CLEAN_RX();
return SIM900A_TRUE;
}
else
{
SIM900A_CLEAN_RX();
return SIM900A_FALSE;
}
}
检测网络状态
/**
* @brief sim900a_gprs_status 判断网络连接状态
* @param 无
* @retval 返回1表示已连接 返回0表示未连接
*/
sim900a_res_e sim900a_gprs_status(void)
{
char redata[256];
char *p;
SIM900A_CLEAN_RX();
sim900a_tx_printf("AT+CIPSTATUS\r");
Delay_ms(100);
strcpy(redata, SIM900A_RX()); //接收数据
SIM900A_CLEAN_RX();
p = strstr(redata,"STATE");//返回STATE后的字符串
if (p)
printf(p);
else
{
printf(redata);
SIM900A_SEND_ENDCHAR();//没有返回 可能是处于发送但未完成的状态
}
if(strstr(redata,"STATE: CONNECT OK") != NULL)//成功
return SIM900A_TRUE;
else
return SIM900A_FALSE;
}
发送数据
/**
* @brief sim900a_gprs_send 通过GPRS发送数据
* @param str:数据指针
* @retval 无
*/
sim900a_res_e sim900a_gprs_send(char * str)
{
SIM900A_CLEAN_RX(); //清空了接收缓冲区数据
sim900a_tx_printf("AT+CIPSEND\r");
SIM900A_DELAY(100); //延时
if (sim900a_cmd_check(">") == SIM900A_TRUE)
{
sim900a_tx_printf("%s",str);
SIM900A_DELAY(100);
SIM900A_SEND_ENDCHAR();
SIM900A_DELAY(2000);
return sim900a_cmd_check("SEND OK");
}
else
{
SIM900A_SEND_ENDCHAR();
return SIM900A_FALSE;
}
}
断开连接
/**
* @brief sim900a_gprs_link_close 断开网络连接
* @param 无
* @retval 无
*/
void sim900a_gprs_link_close(void)
{
sim900a_tx_printf("AT+CIPCLOSE=1\r");
}
发送命令
/**
* @brief sim900a_gprs_checkIP 查IP
* @param 无
* @retval 无
*/
char* sim900a_gprs_checkIP(void)
{
char redata[256];
char *p = redata;
SIM900A_CLEAN_RX();
sim900a_tx_printf("AT+CIFSR\r");
SIM900A_DELAY(100);
strcpy(redata, SIM900A_RX());
SIM900A_CLEAN_RX();
p += 11;
return p;
}
获取IMEI
void get_IMEI(char num[15])
{
u8 i;
char str[16];
char redata[256];
SIM900A_CLEAN_RX();
sim900a_tx_printf("AT+GSN\r");
SIM900A_DELAY(100);
strcpy(redata, SIM900A_RX());
SIM900A_CLEAN_RX();
for (i = 0; i < 15; i++)
{
num[i] = redata[i+9];
str[i] = num[i];
}
str[15] = '\0';
printf("IMEI:%s\r\n",str);
}
判断状态
/**
* @brief gprs_reg_status 判断网络注册状态
* @param 无
* @retval
*/
sim900a_res_e gprs_reg_status(void)
{
char redata[256];
SIM900A_CLEAN_RX();
sim900a_tx_printf("AT+CGREG?\r");
SIM900A_DELAY(100);
strcpy(redata, SIM900A_RX()); //接收数据
SIM900A_CLEAN_RX();
if (redata[22] == '1')
{
printf("已注册本地网络\r\n");
return SIM900A_TRUE;
}
else if (redata[22] == '5')
{
printf("已注册漫游网络\r\n");
return SIM900A_TRUE;
}
else
{
printf("未注册 ERR:%s\r\n",redata[22]);
return SIM900A_FALSE;
}
}
获取CCID
void get_CCID(char num[20])
{
u8 i;
char str[21];
char redata[256];
SIM900A_CLEAN_RX();
sim900a_tx_printf("AT+CCID\r");
Delay_ms(100);
strcpy(redata, SIM900A_RX());
SIM900A_CLEAN_RX();
for (i = 0; i < 20; i++)
{
num[i] = redata[i+10];
str[i] = num[i];
}
str[20] = '\0';
printf("CCID:%s\r\n",str);
}
获取CSQ
void get_CSQ(char *num)
{
char redata[256];
SIM900A_CLEAN_RX();
sim900a_tx_printf("AT+CSQ\r");
SIM900A_DELAY(100);
strcpy(redata, SIM900A_RX());
SIM900A_CLEAN_RX();
*num = redata[15] - '0';
if (redata[16] == ',')
*num = redata[15] - '0';
else if (redata[17] == ',')
*num = (redata[15] - '0') * 10 + (redata[16] - '0');
else
*num = 99;
printf("CSQ:%d\r\n",*num);
}