重量传感器驱动

协议

int CMCU_07R_get(unsigned char *buf, int data_len, unsigned int *G)
{
    
    
		int i;
		unsigned int tmp;
	
		for(i  = 0; i <= (data_len-10); i++)
		{
    
    
			if(buf[i] == 0xaa)
			{
    
    
					tmp = (buf[(i+4)] << 16);
					tmp += (buf[(i+5)] << 8);
					tmp += buf[(i+6)];
					*G = tmp;
			}
		}
		
		return 0;
}
//重量传感器函数
//参数 G重量
//返回 0
//定义硬件接口
int CMCU_07R_deal(unsigned int *G)
{
    
    
	const unsigned char read_weight[5] = {
    
    0xa3, 0x00, 0xa2, 0xa4, 0xa5};
	const unsigned char read_ad[5] = {
    
    0xa1, 0x00, 0xa0, 0xa2, 0xa3};
	static char state = 0,cnt = 0; 
	int ret = 0;
	
	if(state == 0)
	{
    
    
			uart_0_init();	//串口透传功能初始化
			uart_tx_buf.header = 0;  /*?*/
			uart_tx_buf.tail = 0;    /*?*/
			state = 1;	
			return 0;
	}

	if(state == 1)
	{
    
    
			//uart_cmd((unsigned char *)read_ad, 5);
			uart_cmd((unsigned char *)read_weight, 5);
		
			cnt = 0;
			state = 2;
	}
	else
	{
    
    
			if(uart_rx_buf.header >= 10)
			{
    
    
				ret = CMCU_07R_get(uart_rx_buf.data, uart_rx_buf.header, G);
				memset(uart_rx_buf.data, 0, MAX_RX_LENGTH);//清零
				uart_rx_buf.header = 0; 
				state = 1;
			}
			cnt++;
			if(cnt > 10)
			{
    
    
				state = 1;
				memset(uart_rx_buf.data, 0, MAX_RX_LENGTH);//清零
				uart_rx_buf.header = 0; 
			}
	}

	return ret;
}

使用方法
串口波特率设置9600

unsigned int weight = 0;
CMCU_07R_deal(&weight);