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81 lines
1.9 KiB
81 lines
1.9 KiB
2 months ago
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/*
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* rs485_sample_slave.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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*/
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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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#define DBG_TAG "rs485.sample.slave"
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#define DBG_LVL DBG_LOG
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#include <rtdbg.h>
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#ifdef RS485_USING_SAMPLE_SLAVE
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#ifndef RS485_SAMPLE_SLAVE_SERIAL
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#define RS485_SAMPLE_SLAVE_SERIAL "uart2"
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#endif
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#ifndef RS485_SAMPLE_SLAVE_BAUDRATE
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#define RS485_SAMPLE_SLAVE_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_SLAVE_PIN
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#define RS485_SAMPLE_SLAVE_PIN -1 //-1 -- nonuse rs485 mode control
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#endif
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#ifndef RS485_SAMPLE_SLAVE_LVL
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#define RS485_SAMPLE_SLAVE_LVL 1
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#endif
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static void rs485_sample_slave_loopback_test(void *args)
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{
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static rt_uint8_t buf[256];
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rs485_inst_t *hinst = rs485_create(RS485_SAMPLE_SLAVE_SERIAL, RS485_SAMPLE_SLAVE_BAUDRATE,
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RS485_SAMPLE_MASTER_PARITY, RS485_SAMPLE_SLAVE_PIN, RS485_SAMPLE_SLAVE_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, RT_WAITING_FOREVER);
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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 = rs485_recv(hinst, buf, sizeof(buf));
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if (len > 0)
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{
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rs485_send(hinst, buf, len);
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}
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}
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}
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static int rs485_sample_slave_init(void)
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{
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rt_thread_t tid = rt_thread_create("rs485slave", rs485_sample_slave_loopback_test, 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 slave thread startup...");
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return(RT_EOK);
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}
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INIT_APP_EXPORT(rs485_sample_slave_init);
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#endif
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