Revision 19:ba361d9c6b46, committed 2019-11-07

Comitter:

mikevanderploeg

Date:

Thu Nov 07 04:19:27 2019 +0000

Parent:

18:a8ac3a4ed09d

Commit message:

need some help;

Changed in this revision

--- a/PICO_USB_I2C_SPI.lib	Thu Oct 24 23:42:24 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-https://os.mbed.com/users/switches/code/PICO_USB_I2C_SPI/#b4c32ceab541

--- a/USBDevice.lib	Thu Oct 24 23:42:24 2019 +0000
+++ b/USBDevice.lib	Thu Nov 07 04:19:27 2019 +0000
@@ -1,1 +1,1 @@
-https://developer.mbed.org/teams/MaximIntegrated/code/USBDevice/#17ac7abb27a7
+https://developer.mbed.org/teams/MaximIntegrated/code/USBDevice/#dad310740b28

--- a/main.cpp	Thu Oct 24 23:42:24 2019 +0000
+++ b/main.cpp	Thu Nov 07 04:19:27 2019 +0000
@@ -13,14 +13,22 @@
 // Virtual serial port over USB
 USBSerial microUSB(0x0B6A, 0x4360);
 
+DigitalInOut AD[] = {P0_0, P0_1, P0_2, P0_3, P0_4, P0_5, P0_6, P0_7};
+DigitalIn RLOS = P1_6;
+DigitalIn INTB = P1_7;
+DigitalOut WRB = P4_4;
+DigitalOut ALE = P4_5;
+DigitalOut CSB = P4_6;
+DigitalOut RDB = P4_7;
+
 // Serial Interfaces
-I2C i2c(P1_6, P1_7);
-SPI spi(P0_5, P0_6, P0_4);
-DigitalInOut gpio[] = {P0_0, P0_1, P0_2, P0_3, P4_4, P4_5, P4_6, P4_7};
-AnalogIn ain[] = {AIN_0, AIN_1, AIN_2, AIN_3, AIN_4, AIN_5, AIN_6, AIN_7};
+//I2C i2c(P1_6, P1_7);
+//SPI spi(P0_5, P0_6, P0_4);
+//DigitalInOut gpio[] = {P0_0, P0_1, P0_2, P0_3, P4_4, P4_5, P4_6, P4_7};
+//AnalogIn ain[] = {AIN_0, AIN_1, AIN_2, AIN_3, AIN_4, AIN_5, AIN_6, AIN_7};
 
 // Serial Interface Adapter
-SerialInterface serInt(&i2c, &spi, gpio, ain);
+//SerialInterface serInt(&i2c, &spi, gpio, ain);
 
 // Threads
 Thread threadUSB;
@@ -29,6 +37,11 @@
 DigitalOut gLED(LED2);
 DigitalOut bLED(LED3);
 
+void parseCommand( char* input, char* output);
+void write( char* resp );
+void read( char* resp );
+int _args[MAX_NUM_ARGS];
+
 void usb_thread()
 {
     char obuf[USB_MAX_RESP_LENGTH +1];
@@ -49,7 +62,8 @@
                 if (i < USB_MAX_CMD_LENGTH) {
                     ibuf[i]=0;
 //                    microUSB.printf("UART CMD:  %s=", ibuf);
-                    serInt.call(ibuf, obuf);
+//                    serInt.call(ibuf, obuf);
+                    parseCommand( ibuf, obuf );
                     microUSB.printf("%s\r\n", obuf);
                 } else {
                     microUSB.printf("[-1]\r\n");
@@ -71,6 +85,16 @@
     bLED = LED_OFF;
 
 //  Configure P4_4 through P4_7 for 3.3V I/O
+    pico.vddioh(P0_0, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P0_1, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P0_2, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P0_3, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P0_4, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P0_5, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P0_6, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P0_7, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P1_6, MAX32625PICO::VIO_IOH);
+    pico.vddioh(P1_7, MAX32625PICO::VIO_IOH);
     pico.vddioh(P4_4, MAX32625PICO::VIO_IOH);
     pico.vddioh(P4_5, MAX32625PICO::VIO_IOH);
     pico.vddioh(P4_6, MAX32625PICO::VIO_IOH);
@@ -88,3 +112,120 @@
     }
 }
 
+// taken from SerialInterface.cpp
+void parseCommand( char* input, char* output)
+{
+    char cmd;
+    _args[0] = 0; // reset _args
+    if (*input == '/') {  // only proceed if input is the format '/w/addr/data'
+        input++; // look at second character
+        cmd = *input; // cmd should be either 'w' or 'r'
+        input = strchr(input, '/'); // strchr returns a pointer to the first occurance of a character, in this case, it is the second '/'
+        while (*input == '/') { 
+            input++; // advance to next character
+            _args[(_args[0]+1)] = strtol(input, &input, 0); // parse data as integer number
+            if (input) { // if there is still data, increase
+                _args[0]++;
+            }
+        }
+        switch (cmd) {
+            case 'w':  // /w/addr/data
+                write(output);
+                break;
+            case 'r':
+                read(output);
+                break;
+            default:
+                sprintf(output, "!commands: w r");
+                break;
+        }
+    } else {
+        sprintf(output, "!format:  /cmd/arg1/arg2...");
+
+    }
+}
+
+void write(char* resp)
+{
+    int i;
+    // _args[1] should be the address
+    // _args[2] should be the data to write
+    ALE = 1;
+    RDB = 1;
+    WRB = 1;
+    CSB = 0;
+    // Set address
+    for( i=0; i<8; i++ ) {
+        AD[i].output();
+        if( ((int)_args[1] & (1<<i)) > 0 ) 
+            AD[i] = 1;
+        else
+            AD[i] = 0;
+    }
+    wait_us(1.0);
+    // ALE falling latches in address
+    ALE = 0;
+    wait_us(1.0);
+    // Set WRB = 0
+    WRB = 0;
+    wait_us(1.0);
+    // Set data
+    for( i=0; i<8; i++ ) {
+        if( ((int)_args[2] & (1<<i)) > 0 ) 
+            AD[i] = 1;
+        else
+            AD[i] = 0;
+    }
+    wait_us(1.0);
+    // Enable WRB to latch in data
+    WRB = 1;
+    wait_us(1.0);
+    // set CSB
+    CSB = 1;
+    wait_us(1.0);
+    // Set ALE
+    ALE = 1;
+    wait_us(1.0);
+    resp = "[0]";
+}
+    
+void read(char* resp)
+{
+    int i;
+    // _args[1] should be the address
+    ALE = 1;
+    RDB = 1;
+    WRB = 1;
+    CSB = 0;
+    int readVal=0;
+    // Set address
+    for( i=0; i<8; i++ ) {
+        if( ((int)_args[1] & (1<<i)) > 0 ) 
+            AD[i] = 1;
+        else
+            AD[i] = 0;
+    }
+    wait_us(1.0);
+    // ALE falling latches in address
+    ALE = 0;
+    wait_us(1.0);
+    // Set RDB = 0
+    RDB = 0;
+    wait_us(1.0);
+    // Read data
+    // First set as inputs
+    for( i=0; i<8; i++ ) AD[i].input();
+    wait_us(1.0);
+    for( i=0; i<8; i++ ) readVal = readVal + (1<<i) * AD[i];
+    sprintf(resp, "%d", readVal);
+    wait_us(1.0);
+    // Enable WRB to latch in data
+    RDB = 1;
+    wait_us(1.0);
+    // set CSB
+    CSB = 1;
+    wait_us(1.0);
+    // Set ALE
+    ALE = 1;
+    wait_us(1.0);
+}
\ No newline at end of file