[问答]

BM78流量控制问题

1028 EEPROM

问答对人有帮助，内容完整，我也想知道答案 0 我已经启用了BM78中的流量控制，但似乎不起作用。当流量控制被禁用时，RTS引脚总是高的。当它被启用（通过使用UI工具和重新编程EEPROM）时，RTS引脚高，当模块没有连接，然后低到连接时。然而，即使在高速发送数据到模块中，它仍然保持低电平。到达的数据大多是OK，但有时会损坏。在到达的数据中，重复出现的多达12个字节的相同序列。我已经检查了与PC连接到RXD引脚，数据进入BM78是正确的。我在460 kbAd发送一个270字节的块，然后在几个地方出现错误。在屏幕截图中，我重复了很多次，每个块之间有一个短暂的暂停。我还测试了流量控制禁用和逆CTS感在我的MCU。这产生了相同类型的错误。我已经请求支持，但是还没有任何答案。我只是对手动模式有了一个想法。将数据作为命令发送并等待确认可能会更好。在这种情况下，缓冲区可能不会溢出。有人知道缓冲区的大小吗？库尔特M 以上来自于百度翻译以下为原文 I have enabled flow control in the BM78, but it doesn't seem to work. When flow control is disabled, RTS pin is always high. When it is enabled (by using UI tool and reprogramming EEPROM), RTS pin is high when module is not connected and then goes low when connected. However, it stays low even if send data at high speed into the module. The data that arrives is mostly OK, but sometimes corrupted. In the arriving data there are identical sequences of up to 12 bytes that occurs repeatedly. I have checked simultaneously with a PC connected to RXD pin that data entering BM78 is correct. I am sending a block of 270 bytes at 460 kbaud, and then the errors occurs at several places. In the screenshots, I have repeated this a number of times with a short pause between each block. I did also test with flow control disabled and inverse CTS sense on my MCU. This produced the same type of errors. I have asked support about this, but has not got any answers yet. I just had an idea about the manual pattern. It might work better to send data as a command and wait for acknowledgement. In that case, the buffer might not overflow. Is there anybody that has an idea about buffer size? Kurt M. Attached Image(s) 0
2019-5-14 08:19:45　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × qun333 该类别下有 57 个回答。邀请回答 caoguiqun 该类别下有 56 个回答。邀请回答技术发广告该类别下有 56 个回答。邀请回答 psw30 该类别下有 44 个回答。邀请回答伊丹姿子该类别下有 41 个回答。邀请回答 uwufwjrw 该类别下有 39 个回答。邀请回答 hetao1111 该类别下有 38 个回答。邀请回答 lc123617 该类别下有 35 个回答。邀请回答欧阳大大该类别下有 32 个回答。邀请回答作死不止该类别下有 31 个回答。邀请回答 asd010 该类别下有 31 个回答。邀请回答 60user92 该类别下有 29 个回答。邀请回答 wy8719 该类别下有 29 个回答。邀请回答嘻嘻爱哈哈该类别下有 28 个回答。邀请回答 haikitty 该类别下有 28 个回答。邀请回答 ju978779 该类别下有 28 个回答。邀请回答 xiuzhen122 该类别下有 27 个回答。邀请回答 pol666 该类别下有 27 个回答。邀请回答 ueywyrsdfs 该类别下有 26 个回答。邀请回答 lhly23 该类别下有 25 个回答。邀请回答举报刘晓红相关推荐 • BM78有样本源代码吗？ 1298 • BM78在额定电压3.3V下运行是否正常 1555 • BM78 EEPROM编程 2044 • 请问哪里能找到信息描述接口协议的BM78在EEPROM写模式？ 1773 • BM1021双模蓝牙透传模组 939 • 请教下，气路流量控制应该用什么 2782 • 咖啡机是如何实现液体流量控制的 1904 • 如何使用AT指令集实现硬件流量控制？ 114 • 如何实现流量控制的CTS和RTS信号？ 2613 • 怎么实现基于FPGA的具有流量控制机制的高速串行数据传输系统设计？ 1530 1个回答

答案对人有帮助，有参考价值 0 我的问题似乎是在我的MCU中使用的分数波特率分频器。当我跳过这一点时，一切似乎都与BM78一起工作。从我的微控制器与分数波特率分配器的传输数据看起来是好的范围。几乎没有一个完整的字符抖动，可能是1/10位的时间为个别位转换。我怀疑BM78内部的UART在某种程度上是敏感的。流量控制工作，RTS很高，但BM78似乎有一个相当大的缓冲区，应该首先填补。以上来自于百度翻译以下为原文 My problems seems to be the fractional baud rate divider that I am using in my MCU. When I skip that, everything seems to work with the BM78. The transmitted data from my MCU with fractional baud rate divider enabled looked OK on scope. Almost no jitter for a complete character, maybe 1/10 of a bit time for individual bit transitions. I suspect that the UART inside the BM78 is sensitive in some way. Flow control works, RTS goes high, but the BM78 seems to have a rather large buffer that should be filled first.

2019-5-14 08:36:38 评论举报李桂芳