Hello,I'm a electronics student and I've been problems with STMCubeMX and KeilUvision5.
I'm trying to do a menu for a rtc clock,in this menu I'd like to set the minutes,hours,day,etc... with 3 buttons.
Below it's my teacher's code,it's just a example from the clock working,but i dont understande this line:
HAL_I2C_Master_Transmit(&hi2c1, 0xD0, &rtc_radr, 1, 20);
Could someone explain to me how I am having access to all the array memory locations?
Could someone write a code where I for example read the data and send only the minutes, if you have how to do this of course, from now I thank you.
Code:
/**
******************************************************************************
* File Name : main.c
* Description : Main program body
******************************************************************************
** This notice applies to any and all portions of this file
* that are not between comment pairs USER CODE BEGIN and
* USER CODE END. Other portions of this file, whether
* inserted by the user or by software development tools
* are owned by their respective copyright owners.
*
* COPYRIGHT(c) 2017 STMicroelectronics
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32l0xx_hal.h"
/* USER CODE BEGIN Includes */
#include "stdio.h" // inclui a biblioteca para usar o sprintf
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c1;
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
// ---- Matrizes para o I2C ------
uint8_t rtc_adj[9]; // Matriz responsavel para ajustar o DS1307.
uint8_t rtc_read[8];// Matriz responsavel para fazer a leitura do DS1307.
uint8_t rtc_init[2]={0x00,0x00}; // Matriz responsavel para fazer o ajuste inicial.
uint8_t rtc_radr = 0x00;// Variavel responsavel para fazer a leitura de endereço( Read Adress)
uint8_t ds=0x00;
// -------------------------------
uint8_t menu=1,troca=0,hr=0x00,u=0,d=0,x=0,i=0;
char disp[2];// 2 é o numero de espaços no display
uint8_t min=0,hor=0,dia=0,mes=0,ano=0,dm=0;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
// ------ Rotina de Escrita para LCD 16x2 - 4 Bits ----------
/* write_lcd - escrita de dados ou comandos no lcd */
void write_lcd(uint8_t data, uint8_t cmd_data)
{
// identifica se é comando ou dado
if(cmd_data)
{
HAL_GPIO_WritePin(RS_GPIO_Port,RS_Pin,GPIO_PIN_SET);
}
else
{
HAL_GPIO_WritePin(RS_GPIO_Port,RS_Pin,GPIO_PIN_RESET);
}
// 4 bits high
if(data & 0x80) // dado 7 é igual a 1?
{
HAL_GPIO_WritePin(D7_GPIO_Port,D7_Pin,GPIO_PIN_SET);// Se sim,D7=1;
}
else
{
HAL_GPIO_WritePin(D7_GPIO_Port,D7_Pin,GPIO_PIN_RESET);// Se não,D7=0;
}
if(data & 0x40) // dado 6 é igual a 1?
{
HAL_GPIO_WritePin(D6_GPIO_Port,D6_Pin,GPIO_PIN_SET);// Se sim,D6=1;
}
else
{
HAL_GPIO_WritePin(D6_GPIO_Port,D6_Pin,GPIO_PIN_RESET);// Se não,D6=0;
}
if(data & 0x20) // dado 6 é igual a 1?
{
HAL_GPIO_WritePin(D5_GPIO_Port,D5_Pin,GPIO_PIN_SET);// Se sim,D5=1;
}
else
{
HAL_GPIO_WritePin(D5_GPIO_Port,D5_Pin,GPIO_PIN_RESET);// Se não,D5=0;
}
if(data & 0x10) // dado 6 é igual a 1?
{
HAL_GPIO_WritePin(D4_GPIO_Port,D4_Pin,GPIO_PIN_SET);// Se sim,D4=1;
}
else
{
HAL_GPIO_WritePin(D4_GPIO_Port,D4_Pin,GPIO_PIN_RESET);// Se não,D4=0;
}
// Habilitar o Enable do LCD
HAL_GPIO_WritePin(EN_GPIO_Port,EN_Pin,GPIO_PIN_SET); // Habilita o enable do lcd
HAL_Delay(2); // Espera 2 milisegundos(dependendo do display)
HAL_GPIO_WritePin(EN_GPIO_Port,EN_Pin,GPIO_PIN_RESET); // // Desabilita o enable lcd.
// 4 bits low -> nibble menos significativo
if(data & 0x08) // dado 7 é igual a 1?
{
HAL_GPIO_WritePin(D7_GPIO_Port,D7_Pin,GPIO_PIN_SET);// Se sim,D7=1;
}
else
{
HAL_GPIO_WritePin(D7_GPIO_Port,D7_Pin,GPIO_PIN_RESET);// Se não,D7=0;
}
if(data & 0x04) // dado 6 é igual a 1?
{
HAL_GPIO_WritePin(D6_GPIO_Port,D6_Pin,GPIO_PIN_SET);// Se sim,D6=1;
}
else
{
HAL_GPIO_WritePin(D6_GPIO_Port,D6_Pin,GPIO_PIN_RESET);// Se não,D6=0;
}
if(data & 0x02) // dado 6 é igual a 1?
{
HAL_GPIO_WritePin(D5_GPIO_Port,D5_Pin,GPIO_PIN_SET);// Se sim,D5=1;
}
else
{
HAL_GPIO_WritePin(D5_GPIO_Port,D5_Pin,GPIO_PIN_RESET);// Se não,D5=0;
}
if(data & 0x01) // dado 6 é igual a 1?
{
HAL_GPIO_WritePin(D4_GPIO_Port,D4_Pin,GPIO_PIN_SET);// Se sim,D4=1;
}
else
{
HAL_GPIO_WritePin(D4_GPIO_Port,D4_Pin,GPIO_PIN_RESET);// Se não,D4=0;
}
// Habilitar o Enable do LCD
HAL_GPIO_WritePin(EN_GPIO_Port,EN_Pin,GPIO_PIN_SET); // Habilita o enable do lcd
HAL_Delay(2); // Espera 2 milisegundos(dependendo do display)
HAL_GPIO_WritePin(EN_GPIO_Port,EN_Pin,GPIO_PIN_RESET); // // Desabilita o enable lcd.
}
/* Rotina para Inicizalizar o Display LCD 16x2 - 4 Bits */
void init_lcd(void)
{
write_lcd(0x33,0);
write_lcd(0x32,0);
write_lcd(0x28,0);
write_lcd(0x06,0); // deslocamento
write_lcd(0x0C,0); // cursor
write_lcd(0x01,0); // Limpa display
}
/* string_lcd - função para escrever string no LCD 16x2 */
void string_lcd(char *string)
{
while(*string)
{
write_lcd(*string++,1); // manda o dado e desloca a posição.
}
}
/* USER CODE END 0 */
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_I2C1_Init();
/* USER CODE BEGIN 2 */
init_lcd(); // Inicializa o display de lcd.
write_lcd(0x01,0); // Limpa o display de lcd.
string_lcd(" : : "); // Espeço reservado para horas
write_lcd(0xC0,0); // Escreve na linha dois do display.
string_lcd(" / / ");
write_lcd(0xCC,0);
string_lcd("5.13");
// ----- Inicialização do RTC ----------
rtc_adj[0] = 0x00; //endereço do registrador
rtc_adj[1] = 0x00; //segundos
rtc_adj[2] = 0x44; //minutos
rtc_adj[3] = 0x13; //hora
rtc_adj[4] = 0x06; //dia da semana
rtc_adj[5] = 0x09; //dia
rtc_adj[6] = 0x07; //mês
rtc_adj[7] = 0x17; //ano
rtc_adj[8] = 0x10; //controle
// -- Escrita dos dados no DS1307 ----
HAL_I2C_Master_Transmit(&hi2c1,0xD0,rtc_adj,9,20);// escrita, vai enviar a matriz rtc_adj,9 bytes dessa matriz, e espera 20miligundos.
HAL_I2C_Master_Transmit(&hi2c1,0xD0,rtc_init,2,20);// escrita, vai enviar a matriz rtc_init,2 bytes dessa matriz, e espera 20 milisegundos.
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
// --- Leitura RTC através de I2C ---
/* leitura do RTC */
HAL_I2C_Master_Transmit(&hi2c1, 0xD0, &rtc_radr, 1, 20); // envio do endereço do registrador
HAL_I2C_Master_Receive(&hi2c1, 0xD1, rtc_read, 8, 20); //
write_lcd(0x80,0); //hora
write_lcd(((rtc_read[2] & 0x30)>>4) + 0x30, 1);
write_lcd((rtc_read[2] & 0x0F) + 0x30, 1);
write_lcd(0x83, 0); //minuto
write_lcd(((rtc_read[1] & 0x70 )>>4) + 0x30, 1);
write_lcd((rtc_read[1] & 0x0F) + 0x30, 1);
write_lcd(0x86, 0); //segundos
write_lcd(((rtc_read[0] & 0x70)>>4) + 0x30, 1);
write_lcd((rtc_read[0] & 0x0F) + 0x30, 1);
write_lcd(0xC0, 0); //dia do mês
write_lcd(((rtc_read[4] & 0x30)>>4) + 0x30, 1);
write_lcd((rtc_read[4] & 0x0F) + 0x30, 1);
write_lcd(0xC3, 0); // mês
write_lcd(((rtc_read[5] & 0x70)>>4) + 0x30, 1);
write_lcd((rtc_read[5] & 0x0F) + 0x30, 1);
write_lcd(0xC6, 0); //ano
write_lcd(((rtc_read[6] & 0x70)>>4) + 0x30, 1);
write_lcd((rtc_read[6] & 0x0F) + 0x30, 1);
//--- Dia da Semana ---
switch(rtc_read[3])
{
case 1:
write_lcd(0x8D,0);
string_lcd("SUN");
break;
case 2:
write_lcd(0x8D,0);
string_lcd("MON");
break;
case 3:
write_lcd(0x8D,0);
string_lcd("TUE");
break;
case 4:
write_lcd(0x8D,0);
string_lcd("WED");
break;
case 5:
write_lcd(0x8D,0);
string_lcd("THR");
break;
case 6:
write_lcd(0x8D,0);
string_lcd("FRI");
break;
case 7:
write_lcd(0x8D,0);
string_lcd("SAT");
break;
}
min = rtc_read[1];
hor = rtc_read[2];
dia = rtc_read[3];
dm = rtc_read[4];
mes = rtc_read[5];
ano = rtc_read[6];
//------------------------------------------------------------------------------------------
if(!HAL_GPIO_ReadPin(SW1_GPIO_Port,SW1_Pin))
{
HAL_Delay(5);
min=0x08;
HAL_I2C_Master_Transmit(&hi2c1,0xD0,rtc_adj,9,20);// escrita, vai enviar a matriz rtc_adj,9 bytes dessa matriz, e espera 20miligundos.
HAL_I2C_Master_Transmit(&hi2c1,0xD0,rtc_init,2,20);// escrita, vai enviar a matriz rtc_init,2 bytes dessa matriz, e espera 20 milisegundos.
while(!HAL_GPIO_ReadPin(SW1_GPIO_Port,SW1_Pin));
}
}
/* USER CODE END 3 */
}
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_PeriphCLKInitTypeDef PeriphClkInit;
/**Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = 0;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_I2C1;
PeriphClkInit.I2c1ClockSelection = RCC_I2C1CLKSOURCE_PCLK1;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Configure the Systick interrupt time
*/
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
/**Configure the Systick
*/
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/* I2C1 init function */
static void MX_I2C1_Init(void)
{
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x00000708;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
/**Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
{
_Error_Handler(__FILE__, __LINE__);
}
}
/** Configure pins as
* Analog
* Input
* Output
* EVENT_OUT
* EXTI
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOA, D7_Pin|D6_Pin|D5_Pin|D4_Pin
|EN_Pin|RS_Pin, GPIO_PIN_RESET);
/*Configure GPIO pins : D7_Pin D6_Pin D5_Pin D4_Pin
EN_Pin RS_Pin */
GPIO_InitStruct.Pin = D7_Pin|D6_Pin|D5_Pin|D4_Pin
|EN_Pin|RS_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pins : SW3_Pin SW2_Pin SW1_Pin */
GPIO_InitStruct.Pin = SW3_Pin|SW2_Pin|SW1_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
void _Error_Handler(char * file, int line)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
while(1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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