1 // 2 // Copyright (c) 2010-2022 Antmicro 3 // 4 // This file is licensed under the MIT License. 5 // Full license text is available in 'licenses/MIT.txt'. 6 // 7 using System; 8 using System.Collections.Generic; 9 using Antmicro.Renode.Peripherals; 10 using Antmicro.Renode.Peripherals.I2C; 11 using Antmicro.Renode.Core; 12 using Antmicro.Renode.Utilities; 13 14 namespace Antmicro.Renode.Extensions.Mocks 15 { 16 /* Example usage: 17 emulation AddMockI2CHost sysbus.i2c0 18 host.MockI2CHost WriteBytes 0x0 "010203040506070809" 19 host.MockI2CHost ReadBytes 0x0 9 20 host.MockI2CHost WriteBytes 0x0 "01" 21 */ 22 public static class MockI2CHost 23 { AddMockI2CHost(this Emulation emulation, II2CPeripheral device, string name = R)24 public static void AddMockI2CHost(this Emulation emulation, II2CPeripheral device, string name = "MockI2CHost") 25 { 26 emulation.HostMachine.AddHostMachineElement(new I2CHost(device), name); 27 } 28 } 29 30 public class I2CHost : IHostMachineElement 31 { I2CHost(II2CPeripheral device)32 public I2CHost(II2CPeripheral device) 33 { 34 currentSlave = device; 35 } 36 WriteBytes(uint addr, string hexString)37 public void WriteBytes(uint addr, string hexString) 38 { 39 // addr + read_bit 40 var firstByte = (byte)(addr << 1) | 0x0; 41 var dataToSend = Misc.HexStringToByteArray(hexString); 42 var bytes = new byte[dataToSend.Length + 1]; 43 44 bytes[0] = (byte)firstByte; 45 Buffer.BlockCopy(dataToSend, 0, bytes, 1, dataToSend.Length); 46 currentSlave.Write(bytes); 47 currentSlave.FinishTransmission(); 48 } 49 ReadBytes(uint addr, int count)50 public byte[] ReadBytes(uint addr, int count) 51 { 52 var firstByte = (byte)(addr << 1) | 0x1; 53 currentSlave.Write(new byte[] { (byte)firstByte, (byte)count }); 54 currentSlave.FinishTransmission(); 55 56 var returnedData = new List<byte>(); 57 while(returnedData.Count != count) 58 { 59 // Aggressive approach - this will block the monitor until finished. 60 returnedData.AddRange(currentSlave.Read(count - returnedData.Count)); 61 } 62 return returnedData.ToArray(); 63 } 64 65 private readonly II2CPeripheral currentSlave; 66 } 67 } 68
