/*
 * arinc429.c
 *
 *  Created on: 8 juil. 2024
 *      Author: houssni.slamti
 */


/*includes --------------------------------------------------------*/
#include "arinc429.h"

extern SPI_HandleTypeDef hspi2;

void arinc429_transfer(uint32_t data){

	uint8_t buffer[4];
	buffer[0] = (data >> 24) & 0xFF;
	buffer[1] = (data >> 16) & 0xFF;
	buffer[2] = (data >> 8) & 0xFF;
	buffer[3] = data & 0xFF;

	HAL_GPIO_WritePin(ARINC_CS_Port, ARINC_CS_Pin, GPIO_PIN_RESET);

    for (int i = 0; i < 4; i++){
    	while (__HAL_SPI_GET_FLAG(&hspi2, SPI_FLAG_TXE) == RESET); // Attendre que le buffer TX soit vide
    	HAL_SPI_Transmit(&hspi2, (uint8_t*)&buffer[i], 8, HAL_MAX_DELAY);
    	while (__HAL_SPI_GET_FLAG(&hspi2, SPI_FLAG_BSY) == SET); // Attendre la fin de la transmission
    }
	HAL_GPIO_WritePin(ARINC_CS_Port, ARINC_CS_Pin, GPIO_PIN_SET);
}