Diff: main.cpp

Revision:

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+++ b/main.cpp	Tue May 05 16:39:00 2020 +0000
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+/*******************************************************************************
+* Copyright (C) Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+*******************************************************************************/
+//==============================================================================
+//This code is only suitable for single switch press not simultaneous switch press
+//The following code needs maxim-dev library to run. The complete package is available in the GITHUB
+//==============================================================================
+//Header files
+#include "mbed.h"
+#include "USBSerial.h"
+#include "max32625pico.h"
+#include "SerialInterface.h"
+
+
+const int Slave_address                   = 0x70; // MAX7360 I2C slave address
+const int max_key                         = 63;
+
+// Virtual serial port over USB
+USBSerial microUSB(0x0B6A, 0x4360);
+
+DigitalIn nINTK(P4_5); // Key switch interrupt configures as GPIO, refer to page 11 of DS for more info
+
+//The following line of code is optional and please uncomment if you are using rotary encoder
+//DigitalIn nINTI(P4_4); // Interrupt for rotary switch configuration, refer to page 14 for more info
+
+//The following line of code sets all the GPIO to 1.8 volts
+MAX32625PICO pico(MAX32625PICO::IOH_DIP_IN, MAX32625PICO::VIO_IOH, MAX32625PICO::VIO_1V8);
+
+// Serial Interfaces
+I2C i2c(P1_6, P1_7);
+
+
+
+int main()
+{
+
+
+//--------Register configuration for the MAX7360--------------------------------
+//Please refer to page 10 and table 8 of the data sheet
+
+//Writing the configuration register (0x01) of MAX7360.
+
+
+    char Datawrite_config[2];
+    Datawrite_config[0]   = 0x01; //Address of the register
+    Datawrite_config[1]   = 0x20; //Configuring the register for Interrupt by making D5 to 1 and all the other bits to 0
+    i2c.write( Slave_address, Datawrite_config, 2 );
+
+//Writing the Key switch interrupt register (0x03) MAX7360.
+//Please refer to table 10 of the data sheet
+//The interrupt register contains information related to the
+//settings of the interrupt request function, as well as the
+//status of the INTK output, which can also be configured
+//as a GPIO
+    char Datawrite_Key_Switch_Interrupt[2];
+    Datawrite_Key_Switch_Interrupt[0]   = 0x03; //Address of the register
+    Datawrite_Key_Switch_Interrupt[1]   = 0x08; //Configuring the TIME-BASED INTK bits to get 8 debounce cycles
+    i2c.write( Slave_address, Datawrite_Key_Switch_Interrupt, 2 );
+
+
+//Writing the auto sleep register (0x06)MAX7360 Autosleep Register no autosleep
+    char Autosleep[2];
+    Autosleep[0]   = 0x06; //Address of the register
+    Autosleep[1]   = 0x00; //AUTOSHUTDOWN TIME to no autosleep, refer to page 25 of DS
+    i2c.write( Slave_address, Autosleep, 2 );
+
+
+//Writing the GPIO Global Configuration (0x40)
+//Enable rotary encoder and normal GPIO operation
+    char GlobalConfig[2];
+    GlobalConfig[0]   = 0x40; //Address of the register
+    GlobalConfig[1]   = 0x90; //Enabling the I2C timeout interrupt and rotary switch by setting D7 and D5 to 1 and all others to zero
+    i2c.write( Slave_address, GlobalConfig, 2 );
+
+//==============================================================================
+//Uncomment below if you would like ot use rotary encoder
+//==============================================================================
+//Writing GPIO Control Register
+//    char GPIOControl[2];
+//    GPIOControl[0]   = 0x41; //Address
+//    GPIOControl[1]   = 0x3F; //Registrer configuration, All GPIOs configured as output, except ports 6 and 7, because they are connected to the rotary encoder
+//   i2c.write( Slave_address, GPIOControl, 2 );
+//Writing the Rotatory switch configuration (0x46).  Please refer to table 20 of the data sheet
+//    char Datawrite_Rotatory_Switch_configuration[2];
+//Rotary Switch Configuration Register   nINTI asserted 25ms after first debounced event, no debounce cycle time
+//   Datawrite_Rotatory_Switch_configuration[0]   = 0x46;
+//   Datawrite_Rotatory_Switch_configuration[1]   = 0x90;  // Rotary Switch Configuration Register   nINTI asserted 25ms after first debounced event, no debounce cycle time
+//Datawrite_Rotatory_Switch_configuration[1]   = 0x11;
+//   i2c.write( Slave_address, Datawrite_Rotatory_Switch_configuration, 2 );
+
+    /*
+    // Writing PORT6 Configuration Register   mask interrupt  (0x5E)
+        char Port6[2];
+        Port6[0]   = 0x5E; // Address
+        Port6[1]   = 0x80;// masking the interrupt by enabling the D7 to 1  refer to page 30 of DS
+        i2c.write( Slave_address, Port6, 2 );
+
+    // Writing PORT7 Configuration Register   mask interrupt  (0x5F)
+        char Port7[2];
+        Port7[0]   = 0x5F; //Address
+        Port7[1]   = 0x80; // masking of the interrupt by making D7 to 1 refer to page 30 of DS
+        i2c.write( Slave_address, Port7, 2 );
+    */
+//-----------------------------------------------------------------------------
+//Default register values
+//-----------------------------------------------------------------------------
+//writeMAX7360(0x02,0xFF);// Debounce Register only column 0 enabled, debounce set to 40ms
+//  writeMAX7360(0x04,0xFE);          // Ports Register
+//  writeMAX7360(0x05,0x00);            // Autorepeat Register
+//  writeMAX7360(0x42,0x00);            // GPIO Debounce Configuration Register
+//  writeMAX7360(0x43,0xC0);            // GPIO Constant-Current Setting Register
+//  writeMAX7360(0x44,0x00);            // GPIO Output Mode Register
+//  writeMAX7360(0x45,0x00);            // Common PWM Register
+
+//------------------End of Register configuration for MAX7360-----------------//
+
+
+    while(1) {
+
+
+
+//Reading the Key FIFO register (0x00) from MAX7360.
+//Please refer to page 10 and table 7 of the data sheet
+        char KeyFIFOData;
+        char l = 0x00;
+        i2c.write( Slave_address, &l, 1 );
+        i2c.read( Slave_address, &KeyFIFOData, 1 );
+
+
+        if(KeyFIFOData!= max_key) {
+            microUSB.printf("KeyFIFOData = %d \n\r", KeyFIFOData);
+        }
+
+        //      wait_ms(50);  This may be necessary for console printing
+
+//==============================================================================
+//Uncomment the code below for rotary encoder
+//==============================================================================
+////Reading the Rotatory switch count register (0x4A).  Please refer to page 12 and table 23 of the data sheet
+//
+//               char RotaryData;
+//               char m = 0x4A;
+//               if(!nINTI) {
+//                   i2c.write( Slave_address, &m, 1 );
+//                   i2c.read( Slave_address, &RotaryData, 1 );
+//
+//                   if(RotaryData!= 0) {
+//
+//                       microUSB.printf("RotaryData = %x \r\n", RotaryData);
+//                   }
+//
+//        //         wait_ms(100); This may be necessary for console printing
+//
+//                 }
+
+    }
+}
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