connection.c

/*
 * conection.c
 *
 *  Created on: 17.03.2021
 *      Author: symon
 */
#include "stm32l0xx.h"
#include "stm32l0xx_nucleo.h"
#include "global_constants.h"
#include "global_variables.h"
#include "global_functions.h"
#include "connection.h"

uint8_t table_of_bytes_to_sent[2 * ALL_ELEMENTS_TO_SEND + 4];
static volatile int32_t txTransmitted;
static volatile int32_t txSize;
static uint8_t bufor[50];

void DMA1_Channel2_3_IRQHandler(void) {
	//if channel2 transfer USART1 is completed:
	if (DMA1->ISR & DMA_ISR_TCIF2) {
		DMA1->IFCR |= DMA_IFCR_CTCIF2;
		DMA1_Channel2->CCR &= ~DMA_CCR_EN;
		transmitting_is_Done = 1;
	}
	//if channel3 transfer I2C is completed:
	if (DMA1->ISR & DMA_ISR_TCIF3) {
		DMA1->IFCR |= DMA_IFCR_CTCIF3;
		I2C1_read_write_flag = 1;

		DMA1_Channel3->CCR &= ~DMA_CCR_EN;
		if (ibus_received == 0) {
			USART2->CR1 |= USART_CR1_RXNEIE;
			//USART2->CR1 |= USART_CR1_IDLEIE;
		}

	}
}

void USART1_IRQHandler(void) {

	if (0 != (USART_ISR_RXNE & USART1->ISR)) {
		//	read actual value of I-BUS (flag will be automatically removed):
		static uint8_t i;

		bufor[i] = USART1->RDR;
		i++;
		if (i >= 50) {
			i = 0;
		}
	}

//TRANSMISJA:

//	check if interrupt was generated by right flag:
	if ((0 != (USART_CR1_TXEIE & USART1->CR1))
			&& (0 != (USART_ISR_TXE & USART1->ISR))) {
		//	transmit data:
		if ((0 != txSize) && (txTransmitted < txSize)) {
			USART1->TDR = table_of_bytes_to_sent[txTransmitted];
			txTransmitted += 1;
		}
		// if everything is transmitted, unable transmission interrupts:
		if (txTransmitted == txSize) {
			USART1->CR1 &= ~USART_CR1_TXEIE;
			transmitting_is_Done = 1;
		}
	}
}
void print(uint16_t x[], uint8_t data_to_send) {
	uint16_t sum = 0;

	table_of_bytes_to_sent[0] = 0x20;
	table_of_bytes_to_sent[1] = 0x40;
	for (int i = 0; i < data_to_send; i++) {
		table_of_bytes_to_sent[2 * i + 2] = x[i] >> 8;
		table_of_bytes_to_sent[2 * i + 3] = x[i];
		sum += x[i];
	}
	table_of_bytes_to_sent[2 * data_to_send + 2] = sum >> 8;
	table_of_bytes_to_sent[2 * data_to_send + 3] = sum;

	txSize = 2 * data_to_send + 4;

	txTransmitted = 0;
	transmitting_is_Done = 0;
	New_data_to_send = 0;

	DMA1_Channel2->CCR |= DMA_CCR_EN;
}