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