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CSE7759B Fiches technique(PDF) 13 Page - Core Technology (Shenzhen) Co., Ltd. |
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CSE7759B Fiches technique(HTML) 13 Page - Core Technology (Shenzhen) Co., Ltd. |
13 / 25 page 本资料为芯海科技专有财产,非经许可,不得复制、翻印或转变其他形式使用。 This document is exclusive property of CHIPSEA and shall not be reproduced or copied or transformed to any other format without prior permission of CHIPSEA 聚点滴之芯.成浩瀚之海 13/25 3.4 Serial Port Protocol Relevant parameters of voltage, current, power and electric quantity could be read by the user through UART serial port protocol (RI and TI) and voltage, current, power and electric quantity could be obtained through calculation. At present, this serial port only supports baud rate of 4800bp (with allowable error of ±2%). Receive port RI is reserved temporarily and does not have actual function. The serial port will transmit data pockets of voltage coefficient, voltage cycle, current coefficient, current cycle, power coefficient, power cycle, calibration times and number of CF pulses through TI (transmit data in hexadecimal system). Specific format of the data pocket is composed of: Packet header (2*(1byte data+1bit even parity check))→voltage coefficient (3*(1byte data +1bit even parity check))→voltage cycle (3*(1byte data +1bit even parity check))→current coefficient (3*(1byte data +1bit even parity check))→current cycle (3*(1byte data +1bit even parity check))→power coefficient (3*(1byte data +1bit even parity check))→power cycle (3*(1byte data +1bit even parity check))→calibration times (1*(1byte data +1bit even parity check))→number of CF pulses (2*(1byte data +1bit even parity check))→Packet tail(1bytedata +1bit even parity check). 24byte totally; 54.912ms is used at 4800bps. Figure 4: Schematic Diagram of UART Data Table 3-1 Data Symbol Data Name High Byte Medium Byte Low Byte Voltage coefficient Ukh Ukm Ukl Voltage cycle Uth Utm Utl Current coefficient Ikh Ikm Ikl Even Parity Check Byte No. data flow Stop Bit Start Bit |
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