11 years, 11 months ago.

uart.attach(&uart_interrupt(), Serial::RxIrq); (Error 158)

First off let me explain that I am a complete neophyte here.

And also thanks to Christian and Rainer for getting me this far.

First off let me explain that I am a complete neophyte here.

My day job is as a consultant for projects ranging from Architectural Engineering to product development, management, etc.

The purpose of the code is to eventually trigger relays, which I am using LED2-4 in place of.

In operation function1 will clear all relays (logic1 or float) function2 - functionx will turn on the relay (logic 0)

Each function is an 8byte word that always start 0xF9, 0xFF; and end 0x00 Communication is via RS-232 or 485 (RS-232 seems to work fine)

Also LED1 will flash if Uart active. (I probably don't need this if the MBED LED does the same thing.

I am hung up on an error at ... uart.attach(&uart_interrupt(), Serial::RxIrq);

Error 158 ("Expression must be an Ivalue or function designator")

I am also unsure of the placement for "int i = 0"

The purpose of the code is to eventually trigger relays, which I am using LED2-4 in place of.

In operation function1 will clear all relays (logic1 or float) function2 - functionx will turn on the relay (logic 0)

Each function is an 8byte word that always start 0xF9, 0xFF; and end 0x00 Communication is via RS-232 or 485 (RS-232 seems to work fine)

Also LED1 will flash if Uart active. (I probably don't need this if the MBED LED does the same thing.

1. include "mbed.h"

char buffer[8]; char function1[] = {0xF9, 0xFF, 0xFF, 0xFF, 0xFF, 0xA1, 0xC2, 0x00}; Array for function

char function2[] = {0xF9, 0xFF, 0xBF, 0xFF, 0xFF, 0xA1, 0x42, 0x00};

char function3[] = {0xF9, 0xFF, 0x7F, 0xFF, 0xFF, 0xA1, 0xC2, 0x00};

char function4[] = {0xF9, 0xFF, 0xE8, 0x99, 0xDF, 0xA1, 0x66, 0x00};

int i = 0;

Serial pc(USBTX, USBRX);

Serial uart(p9, p10); Connect TX to RX (p9 to p10)

void uart_interrupt()

{

if(uart.readable()) { check availability

buffer[i] = uart.getc(); copy the serial input to buffer

i++; increment buffer value

}

}

DigitalOut uart_activity(LED1);

DigitalOut led2(LED2);

DigitalOut led3(LED3);

DigitalOut led4(LED4);

assign led function

int main()

{

uart.baud(2400);

uart.attach(&uart_interrupt(), Serial::RxIrq);

while(true) {

if(!memcmp(buffer, function1, 8)) {

led4 = 1;

i = 0; doing this prevents buffer overflow, i.e. you reset i, to point to buffer[0] again.

}

if(buffer == function1)

led4 = 1; led 1 on if function1

while(1) {

if(pc.readable()) {

uart.putc(pc.getc());

pc_activity = !pc_activity

}

uart_activity = 0; turn off rx led

if(uart.readable()) {

pc.putc(uart.getc());

uart_activity = !uart_activity;

wait(0.01); Turn on LED 1 when data received

void Tx_interrupt();

void Rx_interrupt();

void send_line();

void read_line();

}

}

}

}