MSP430F169的i2c实际应用（国外英文资料）.docVIP

MSP430F169的i2c实际应用（国外英文资料） Original MSP430F169 i2c application -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- MSP430F169 i2c program (for reference only) / * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * file name: msp430f169i2c * overall description: MSP430F169 monolithic hardware IIC software, byte mode, master mode * IIC interface: P3.3 = SCL. (open drain) * the corresponding register: the address register I2COA is used to store itself from the address (in a way that is useful) * address register I2CSA is used to store the peripherals from the machine address (the main method is useful) * the control register U0CTL hardware I2C setting, enabling, mode, and so on. Send the control register I2CTCTL * the data control register I2CDCTL indicates the state of the I2C bus * * U0CTL - RXDMAEN, TXDMAEN, I2C, XA, LISREN, SYNC, MST, I2CEN * 0, 0, 0, 1, 0, 1, 1, 1 (0x17) * I2CTCTL - I2CWORD, I2CRM, I2CSSEL1, I2XSSEL0, I2CSTB * 0, 1, 1, 0 * 0 * * * I2C from machine AT24C512, note the definition of read-write address (MSB) 1 0 1 0 A1 A0 R/W (LSB) * the author: jy * status: passing * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * / # include msp430x16x. H # include fpgacode. H # define WR24C512 # define SDA_1 P3OUT | = BIT1 / / serial data line, SDA = 1 Pound sign define SDA_0 P3OUT # define SCL_1 P3OUT | = BIT3 / / serial clock line, SCL = 1 Pound sign define SCL_0 P3OUT = ~ BIT3 / / SCL = 0 # define SDADIR_IN P3DIR = ~ BIT1 / / SDA, I/O for input # define SDADIR_OUT P3DIR | = BIT1 / / I / 0 for output Define SDA_IN ((P3IN 1) / / Read SDA # define SCLDIR_IN P3DIR = ~ BIT3 / / SCL, I/O for input The # define SCLDIR_OUT P3DIR | = BIT3 / / I