[AC2] Add Aula11

Signed-off-by: TiagoRG <tiago.rgarcia@ua.pt>

2ano/2semestre/ac2/aula11/part1.c

@@ -0,0 +1,50 @@
+#include <detpic32.h>
+
+int main() {
+    TRISCbits.TRISC14 = 0;
+
+    U2BRG = ((PBCLK + 8 * 115200) / (16 * 115200)) - 1;
+    U2MODEbits.BRGH = 0;    // 16x baud clock enabled (1 -> 4x baud clock)
+
+    U2MODEbits.PDSEL = 00;  // 8 data bits, without parity
+    U2MODEbits.STSEL = 0;   // 1 stop bit
+
+    U2STAbits.URXEN = 1;    // Enable Receiver
+    U2STAbits.UTXEN = 1;    // Enable Transmitter
+
+    IEC1bits.U2RXIE = 1;
+    IEC1bits.U2TXIE = 0;
+    IPC8bits.U2IP = 2;
+    IFS1bits.U2RXIF = 0;
+
+    U2MODEbits.ON = 1;
+
+    EnableInterrupts();
+
+    while (1);
+    return 0;
+}
+
+void putc(char byte) {
+    // wait while UTXBF == 1
+    while (U2STAbits.UTXBF == 1);
+    // Copy byte to the UxTXREG register
+    U2TXREG = byte;
+}
+
+void _int_(32) isr_uart2rx() {
+    // If OERR == 1 then reset OERR
+    if (U2STAbits.OERR == 1)
+        U2STAbits.OERR = 0;
+    // Wait while URXDA == 0
+    while (U2STAbits.URXDA == 0);
+    // Save U2RXREG value
+    char c = U2RXREG;
+
+    if (c == 'T') LATCbits.LATC14 = 1;
+    else if (c == 't') LATCbits.LATC14 = 0;
+
+    putc(c);
+
+    IFS1bits.U2RXIF = 0;
+}

2ano/2semestre/ac2/aula11/part2.c

@@ -0,0 +1,57 @@
+#include "p32mx795f512h.h"
+#include <detpic32.h>
+
+volatile struct {
+    char mem[100];
+    int nchar;
+    int posrd;
+} txbuf;
+
+void putStrInt(char *s) {
+    while (txbuf.nchar > 0);
+
+    while (*s != '\0')
+        txbuf.nchar++[txbuf.mem] = *s++;
+
+    txbuf.posrd = 0;
+    IEC1bits.U2TXIE = 1;
+}
+
+int main() {
+    U2BRG = ((PBCLK + 8 * 115200) / (16 * 115200)) - 1;
+    U2MODEbits.BRGH = 0;    // 16x baud clock enabled (1 -> 4x baud clock)
+
+    U2MODEbits.PDSEL = 00;  // 8 data bits, without parity
+    U2MODEbits.STSEL = 0;   // 1 stop bit
+
+    U2STAbits.URXEN = 1;    // Enable Receiver
+    U2STAbits.UTXEN = 1;    // Enable Transmitter
+
+    IEC1bits.U2RXIE = 0;
+    IEC1bits.U2TXIE = 0;
+    IPC8bits.U2IP = 2;
+    IFS1bits.U2TXIF = 0;
+    U2STAbits.UTXISEL = 00;
+
+    U2MODEbits.ON = 1;
+
+    EnableInterrupts();
+    txbuf.nchar = 0;
+
+    while (1) {
+        putStrInt("Test string which can be as long as you like, up to a maximum of 100 characters\n");
+    }
+
+    return 0;
+}
+
+void _int_(32) isr_uart2tx() {
+    if (!IFS1bits.U2TXIF) return;
+    if (txbuf.nchar-- > 0) {
+        U2TXREG = txbuf.posrd++[txbuf.mem];
+    } else {
+        IEC1bits.U2TXIE = 0;
+    }
+
+    IFS1bits.U2TXIF = 0;
+}

2ano/2semestre/ac2/aula11/part3.c

@@ -0,0 +1,155 @@
+#include <detpic32.h>
+
+#define SAMPLES 4
+
+volatile int voltage = 0;
+volatile int voltMin = 33;
+volatile int voltMax = 0;
+
+const unsigned int dis7Scodes[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D,
+                                   0xFD, 0x07, 0x7F, 0x6F, 0x77, 0xFC,
+                                   0x39, 0x5E, 0xF9, 0xF1};
+
+typedef enum { HIGH, LOW } display;
+
+unsigned char toBdc(unsigned char value) {
+    return ((value / 10) << 4) + (value % 10);
+}
+
+void send2displays(unsigned char value) {
+    static display flag = LOW;
+    unsigned char high = dis7Scodes[value >> 4];
+    unsigned char low = dis7Scodes[value & 0x0F];
+
+    if (flag == HIGH) {
+        LATD = (LATD & 0xFF9F) | 0x0040;
+        LATB = (LATB & 0x80FF) | high << 8;
+        flag = LOW;
+    } else {
+        LATD = (LATD & 0xFF9F) | 0x0020;
+        LATB = (LATB & 0x80FF) | low << 8;
+        flag = HIGH;
+    }
+}
+
+void putc(char byte) {
+    // wait while UTXBF == 1
+    while (U2STAbits.UTXBF == 1);
+    // Copy byte to the UxTXREG register
+    U2TXREG = byte;
+}
+
+void putstr(char *str) {
+    // use putc() function to send each charater ('\0' should not be sent)
+    while (*str != '\0') putc(*str++);
+}
+
+
+int main() {
+    TRISB &= 0x80FF;
+    TRISD &= 0xFF9F;
+
+    TRISBbits.TRISB4 = 1;
+    AD1PCFGbits.PCFG4 = 0;
+    AD1CON1bits.SSRC = 7;
+    AD1CON1bits.CLRASAM = 1;
+    AD1CON3bits.SAMC = 16;
+    AD1CON2bits.SMPI = SAMPLES - 1;
+    AD1CHSbits.CH0SA = 4;
+    AD1CON1bits.ON = 1;
+
+    IPC6bits.AD1IP = 2;
+    IFS1bits.AD1IF = 0;
+    IEC1bits.AD1IE = 1;
+
+    // Configure Timer T1 with 5Hz frequency
+    T1CONbits.TCKPS = 2;
+    PR1 = 62499;
+    TMR1 = 0;
+    T1CONbits.TON = 1;
+
+    // Configure Timer T3 with 100Hz frequency
+    T3CONbits.TCKPS = 2;
+    PR3 = 49999;
+    TMR3 = 0;
+    T3CONbits.TON = 1;
+
+    IPC1bits.T1IP = 2;
+    IFS0bits.T1IF = 0;
+    IEC0bits.T1IE = 1;
+
+    IPC3bits.T3IP = 2;
+    IFS0bits.T3IF = 0;
+    IEC0bits.T3IE = 1;
+
+    U2BRG = ((PBCLK + 8 * 115200) / (16 * 115200)) - 1;
+    U2MODEbits.BRGH = 0;    // 16x baud clock enabled (1 -> 4x baud clock)
+
+    U2MODEbits.PDSEL = 00;  // 8 data bits, without parity
+    U2MODEbits.STSEL = 0;   // 1 stop bit
+
+    U2STAbits.URXEN = 1;    // Enable Receiver
+    U2STAbits.UTXEN = 1;    // Enable Transmitter
+
+    IEC1bits.U2RXIE = 1;
+    IEC1bits.U2TXIE = 0;
+    IPC8bits.U2IP = 2;
+    IFS1bits.U2RXIF = 0;
+
+    U2MODEbits.ON = 1;
+
+    EnableInterrupts();
+    while (1);
+
+    return 0;
+}
+
+void _int_(4) isr_T1(void) {
+    AD1CON1bits.ASAM = 1;
+    IFS0bits.T1IF = 0;
+}
+
+void _int_(12) isr_T3(void) {
+    send2displays(toBdc(voltage));
+    IFS0bits.T3IF = 0;
+}
+
+void _int_(27) isr_adc(void) {
+    int *p = (int *)(&ADC1BUF0);
+    int media = 0;
+    for (; p <= (int *)(&ADC1BUFF); p++)
+        media += *p;
+    media /= SAMPLES;
+    voltage = (media * 33 + 511) / 1023;
+    voltMin = voltage < voltMin ? voltage : voltMin;
+    voltMax = voltage > voltMax ? voltage : voltMax;
+    IFS1bits.AD1IF = 0;
+}
+
+void _int_(32) isr_uart2rx() {
+    // If OERR == 1 then reset OERR
+    if (U2STAbits.OERR == 1)
+        U2STAbits.OERR = 0;
+    // Save U2RXREG value
+    char c = U2RXREG;
+
+    if (c == 'M') {
+        char v = toBdc(voltMax);
+        putstr("VMax=");
+        putc((v >> 4) + 0x30);
+        putc('.');
+        putc((v & 0x0F) + 0x30);
+        putc('V');
+        putc('\n');
+    } else if (c == 'm') {
+        char v = toBdc(voltMin);
+        putstr("VMin=");
+        putc((v >> 4) + 0x30);
+        putc('.');
+        putc((v & 0x0F) + 0x30);
+        putc('V');
+        putc('\n');
+    }
+
+    IFS1bits.U2RXIF = 0;
+}