This is the LCD1602 and communication between the MSP430 can in fact be a direct transplant from the 51, but must be coupled with pull-up resistor in the hardware, otherwise it is unreasonable, however, I say is that you use the LCD is 5V

Packet : 117143191lcd1602.rar filelist
LCD1602计数器（完成）\main.c
LCD1602计数器（完成）\1602.eww
LCD1602计数器（完成）\1602.ewp
LCD1602计数器（完成）\1602.ewd
LCD1602计数器（完成）\1602.dep
LCD1602计数器（完成）\1602.c
LCD1602计数器（完成）\settings\1602.wsdt
LCD1602计数器（完成）\settings\1602.dni
LCD1602计数器（完成）\settings\1602.dbgdt
LCD1602计数器（完成）\settings
LCD1602计数器（完成）\Debug
LCD1602计数器（完成）

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