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98 lines
2.3 KiB
98 lines
2.3 KiB
8 months ago
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/*
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* rs485_sample_master.c
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*
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* Change Logs:
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* Date Author Notes
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* 2020-12-17 qiyongzhong first version
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* 2020-12-18 qiyongzhong fix to rs485_send_then_recv
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <rs485.h>
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#include <string.h>
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#define DBG_TAG "rs485.sample.master"
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#define DBG_LVL DBG_LOG
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#include <rtdbg.h>
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#ifdef RS485_USING_SAMPLE_MASTER
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#ifndef RS485_SAMPLE_MASTER_SERIAL
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#define RS485_SAMPLE_MASTER_SERIAL "uart2" //serial device name
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#endif
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#ifndef RS485_SAMPLE_MASTER_BAUDRATE
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#define RS485_SAMPLE_MASTER_BAUDRATE 9600
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#endif
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#ifndef RS485_SAMPLE_MASTER_PARITY
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#define RS485_SAMPLE_MASTER_PARITY 0 //0 -- none parity
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#endif
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#ifndef RS485_SAMPLE_MASTER_PIN
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#define RS485_SAMPLE_MASTER_PIN -1 //-1 -- nonuse rs485 mode control
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#endif
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#ifndef RS485_SAMPLE_MASTER_LVL
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#define RS485_SAMPLE_MASTER_LVL 1
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#endif
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static void rs485_sample_master(void *args)
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{
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const char read_cmd[] = "read datas test\r\n";
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static rt_uint8_t buf[256];
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rs485_inst_t *hinst = rs485_create(RS485_SAMPLE_MASTER_SERIAL, RS485_SAMPLE_MASTER_BAUDRATE,
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RS485_SAMPLE_MASTER_PARITY, RS485_SAMPLE_MASTER_PIN, RS485_SAMPLE_MASTER_LVL);
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if (hinst == RT_NULL)
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{
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LOG_E("create rs485 instance fail.");
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return;
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}
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rs485_set_recv_tmo(hinst, 1000);
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if (rs485_connect(hinst) != RT_EOK)
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{
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rs485_destory(hinst);
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LOG_E("rs485 connect fail.");
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return;
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}
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while(1)
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{
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int len = strlen(read_cmd);
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len = rs485_send_then_recv(hinst, (void *)read_cmd, len, buf, sizeof(buf));
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if (len < 0)
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{
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LOG_E("rs485 send datas error.");
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break;
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}
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if (len == 0)
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{
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LOG_D("rs485 recv timeout.");
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continue;
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}
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buf[len] = 0;
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LOG_D("rs485 recv %d datas : %s", len, buf);
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}
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rs485_destory(hinst);
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LOG_D("rs485 test end.");
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}
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static int rs485_sample_master_init(void)
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{
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rt_thread_t tid = rt_thread_create("rs485master", rs485_sample_master, RT_NULL, 1024, 8, 20);
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RT_ASSERT(tid != RT_NULL);
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rt_thread_startup(tid);
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LOG_I("rs485 sample master thread startup...");
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return(RT_EOK);
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}
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INIT_APP_EXPORT(rs485_sample_master_init);
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#endif
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