mikromedia Plus for STM32 ARM(STM32F407ZG) - RS485 4 click

[yoonjk1991]

Hello
A few days ago I got a good answer. Thank you.

This time I am trying to transfer data using RS485 4 click.
"RS485_4_click" was installed on "mikromedia_Plus_for_STM32_ARM_Shield"-BUS4

Code: Select all

sbit  RS485_rxtx_pin           at GPIOE_ODR.B5;

void main() {

  Start_TP();

  UART2_Init(19200);                           // initialize UART1 module
  Delay_ms(100);
  RS485Master_Init();                         // intialize MCU as a Master for RS-485 communication

  USART2_CR1bits.RXNEIE = 1;       // enable uart rx interrupt

  GPIO_Digital_Input(&GPIOE_IDR, _GPIO_PINMASK_3);
  NVIC_IntEnable(IVT_INT_USART2);  // enable interrupt vector

  while (1) {
    Check_TP();
    if((Button(&GPIOE_IDR, 3, 1, 0)) && (a == 0)){

      RS485Master_Send(dat,1,160);
      a = 1;
    }

    if((Button(&GPIOE_IDR, 3, 1, 1)) && (a == 1)){
       a = 0;
    }
  }
}

PE5Pin responds at the press of a button,

But communication is unresponsive.

Cap 2020-01-17 18-27-15-259.png (67.83 KiB) Viewed 4024 times

PA3-USART2 RX
PD5-USART2 TX
Can't set

What should I do?

Thank you in advance !!

[AntiMember]

Maybe
GPIO_Alternate_Function_Enable(&_GPIO_MODULE_USART2_PA23);

[yoonjk1991]

Thank you!

I solved it with "GPIO_Alternate_Function_Enable(&_GPIO_MODULE_USART2_PD5_PA3);"

----------------------------------------------------------------------------------------



I've written and read using RS485Master_Send and RS485Master_Receive.

But because of the protocol I couldn't communicate.

For example, sending (0x)"AB CD EF 12 34" sends "96 00 83 AB CD EF 12 34 29 A9",

Incoming data was blocked by the protocol.

I want to create a protocol.


Contact 1. I want to send it as is without start bit or CRC. ex) "AB CD EF 12 34"-> "AB CD EF 01 02")

Contact 2. How do I use UART interrupts?

Contact 3. Is there a way to see the source of the RS485Master_Send and RS485Master_Receive functions?
-> Is there a way to see the function source as well as this?


Thank you for your reply.

[AntiMember]

If you want to create your own protocol - why do you need the RS-485 Library ...
Write your receive and transmit handlers.
It:
sbit RS485_rxtx_pin at GPIOE_ODR.B5; //Set B5 - transmit, reset B5 - receive
USART2_CR1bits.RXNEIE = 1; // enable uart rx interrupt
NVIC_IntEnable (IVT_INT_USART2); // enable interrupt vector
can be used.
Interrupt handler? ..
procedure interrupt (); iv IVT_INT_USART2;
begin
Your_Master_Receive (buf);
end;
The source code of the library is a question for mikroe...

[filip.grujcic]

Hello,

The source code of the compiler's libraries is not distributable due to company's policy I'm afraid.
Refer to the reference manual for your MCU in order to find more info about UART module.

Regards,

[Toley]

Thank you for answer.

mikromedia Plus for STM32 ARM(STM32F407ZG) - mikroC PRO is in use.

I'm trying to ask a question about sending, receiving UART.

There seems to be no UART TX, TR interrupt example. Is there an example?
There are no examples in the library.

[filip.grujcic]

Hello,

There aren't any official examples for UART interrupt.
However, in the above post made by AntiMember you have everything you need in order to make an UART interrupt.

Regards,

[Toley]

Thank you for answer.

mikromedia Plus for STM32 ARM(STM32F407ZG) - mikroC PRO is in use.

I'm trying to ask a question about sending, receiving UART.

There seems to be no UART TX, TR interrupt example. Is there an example?
There are no examples in the library.

I someone using my Nickname? I did not write that question!!!

[yoonjk1991]

Thank you for answer.

mikromedia Plus for STM32 ARM(STM32F407ZG) - mikroC PRO is in use.

I'm trying to ask a question about sending, receiving UART.

There seems to be no UART TX, TR interrupt example. Is there an example?
There are no examples in the library.

I someone using my Nickname? I did not write that question!!!

??????

I don't know how your name is logged into my computer,

I'm sorry.

[AntiMember]

//UARTIRQ
//UART interrupt usage example. Uses UART Lib.
unsigned short txc = 0;
unsigned short rxc = 0;
unsigned rxflg = 0;
unsigned rxbuf[16];
unsigned txbuf[16];

// Interrupt routine
void interrupt() iv IVT_INT_USART1 ics ICS_AUTO
{
if (USART1_SRbits.RXNE) // if uart rx DR not empty
{
rxbuf[rxc] = USART1_DR & 0x1FF; // read 9 bits from the data register
rxc++;
rxc = rxc & 0x0F; // make a circular buffer
rxflg = 1; // if symbol received - set flag
}
if (USART1_SRbits.TC) // if uart tx tracmit complete
{
USART1_DR = txbuf[txc] & 0x1FF; // write 9 bits to the data register
txc++;
txc = txc & 0x0F; // make a circular buffer
}
}

void sendsymb(unsigned symb)
{
USART1_DR = symb & 0x1FF;
}

void main()
{
unsigned i;
UART1_Init(9600); // initialize UART1 module
Delay_ms(100);

USART1_CR1bits.RXNEIE = 1; // enable uart rx DR not empty interrupt
USART1_CR1bits.TCIE = 1; // enable uart tx tracmit complete interrupt
USART1_SRbits.RXNE = 0; // clear uart tx DR empty pending bit
USART1_SRbits.TC = 0; // clear uart tx tracmit complete pending bit
NVIC_IntEnable(IVT_INT_USART1); // enable interrupt vector

txc = sizeof(txbuf)/2;
for (i=0;i<txc;i++)
{
txbuf = '*'; // fill the transfer buffer with *
}
sendsymb(txbuf[0]); // initialize the TC interrupt by passing the first character

while (1)
{
if (rxflg) // if there is a received symbol
{
txbuf[txc] = rxbuf[rxc-1]; // the received character is transferred to the current location of the transmission buffer
rxflg = 0; // the received symbol is processed - clear the flag
}
}
}