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

LCD1602计数器（完成）
.....................\1602.c
.....................\1602.dep
.....................\1602.ewd
.....................\1602.ewp
.....................\1602.eww
.....................\Debug
.....................\main.c
.....................\settings
.....................\........\1602.dbgdt
.....................\........\1602.dni
.....................\........\1602.wsdt

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