Research on. NET micro framework-Simulator with I2C bus

I2C has never been touched before, so its simulation function can only rely on the feeling, there is something wrong, still hope that the House correct. With the SPI-related simulation function, it is not difficult to do I2C, but it is a little troublesome for users to read and write data through the I2C bus.

Test program running interface: the I2C bus code in the simulator is as follows: public class i2ccomponent: i2cdevice {public byte [] bytdata = new byte [8]; protected override void deviceread (byte [] data) {try {for (INT I = 0; I <data. length; I ++) {if (I <bytdata. length) data [I] = bytdata [I];} catch {} base. deviceread (data);} protected override void devicewrite (byte [] data) {try {for (INT I = 0; I <data. length; I ++) {if (I <bytdata. l Ength) bytdata [I] = data [I] ;}} catch {} base. devicewrite (data);} protected override void devicebegintransaction () {base. devicebegintransaction ();} protected override void deviceendtransaction () {base. deviceendtransaction () ;}} test code: (expanded based on the original program): static SPI _ SPI; public static void main () {outputport [] Output = new outputport [8]; inputport [] input = new inputport [8]; // pin definition of gpio of the Yifan Simulator CPU. pin [] pin_ I = new CPU. pin [8] {(CPU. PIN) 10, (CPU. PIN) 11, (CPU. PIN) 12, (CPU. PIN) 13, (CPU. PIN) 14, (CPU. PIN) 15, (CPU. PIN) 16, (CPU. PIN) 17}; CPU. pin [] pin_q = new CPU. pin [8] {(CPU. PIN) 20, (CPU. PIN) 21, (CPU. PIN) 22, (CPU. PIN) 23, (CPU. PIN) 24, (CPU. PIN) 25, (CPU. PIN) 26, (CPU. PIN) 27}; // SPI pin definition _ SPI = new SPI (New SPI. configuration (CPU. PIN) 30, true, 0, 0, false, false, 4000, SPI. spi_module.spi1); // I 2c defines that the I2C address of the simulator is 100. Do not set the clock speed too small. Otherwise, the i2cdevice i2cbus = new i2cdevice (New i2cdevice. configuration (100,200); For (INT I = 0; I <8; I ++) {input [I] = new inputport (pin_ I [I], false, port. resistormode. pulldown); Output [I] = new outputport (pin_q [I], false);} int intnum = 0; while (true) {output [intnum]. write (! Output [intnum]. read (); debug. print ("I:" + input [0]. read (). tostring () + "" + input [1]. read (). tostring () + "" + input [2]. read (). tostring () + "" + input [3]. read (). tostring () + "" + input [4]. read (). tostring () + "" + input [5]. read (). tostring () + "" + input [6]. read (). tostring () + "" + input [7]. read (). tostring (); debug. print ("ad:" + readwritead (int16) intnum ). tostring () + "" + intnum. tostring (); // --------------------------------------- // I2C read/write byte [] bytrdata = new byte [8]; byte [] bytwdata = new byte [3]; bytwdata [0] = (byte) intnum; bytwdata [1] = (byte) (intnum * 2); bytwdata [2] = (byte) (intnum * 3); i2cdevice. i2ctransaction [] I2C = new i2cdevice. i2ctransaction [2]; I2C [0] = i2cbus. createreadtransaction (bytrdata); I2C [1] = i2cbus. createwritetransaction (bytwdata); i2cbus. execute (I2C, 100); // execute debug. print ("I2C:" + bytrdata [0]. tostring () + "" + bytrdata [1]. tostring () + "" + bytrdata [2]. tostring () + "" + bytrdata [3]. tostring () + "" + bytrdata [4]. tostring () + "" + bytrdata [5]. tostring () + "" + bytrdata [6]. tostring () + "" + bytrdata [7]. tostring (); // ----------------------------------------- if (++ intnum> 7) intnum = 0; thread. sleep (800) ;}} public static int16 readwritead (int16 value) {byte [] bout = new byte [2]; byte [] bin = new byte [2]; bout [0] = (byte) (value> 8); bout [1] = (byte) (Value & 0xff); _ SPI. writeread (bout, BIN); int16 aw0 = (int16) (bin [0] <8) + bin [1]); Return aw0 ;}}

Now, the simulator's work is coming up with a paragraph to improve the simulator and share it with interested netizens, in this way, you can test some interesting code and functions without buying hardware (a test board costs hundreds of dollars !).