I2C

herrusw · ‎2015-07-10

Posted on July 10, 2015 at 11:17

Hallo Every One

I try To Communicate with PCA 9539 PORT EXPANDER

and Here Are My Code

&sharpdefine slave_add 0x74

uint8_t mem[10];

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/

I2C_HandleTypeDef hi2c1;

/* USER CODE BEGIN PV */

/* 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 */

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

/* 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();

/* Configure the system clock */

SystemClock_Config();

/* Initialize all configured peripherals */

MX_GPIO_Init();

MX_I2C1_Init();

/* USER CODE BEGIN 2 */

mem[0]=0x02;

mem[1]=255;

mem[2]=255;

mem[3]=0;

mem[4]=0;

mem[5]=0;

mem[6]=0;

mem[7]=1;

/* USER CODE END 2 */

/* Infinite loop */

/* USER CODE BEGIN WHILE */

while (1)

{

/* USER CODE END WHILE */

HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_5);

HAL_Delay(500);

HAL_I2C_Master_Transmit(&hi2c1,slave_add,mem,6,1);

/* USER CODE BEGIN 3 */

}

/* USER CODE END 3 */

}

/** System Clock Configuration

*/

void SystemClock_Config(void)

{

RCC_OscInitTypeDef RCC_OscInitStruct;

RCC_ClkInitTypeDef RCC_ClkInitStruct;

__PWR_CLK_ENABLE();

__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

RCC_OscInitStruct.HSIState = RCC_HSI_ON;

RCC_OscInitStruct.HSICalibrationValue = 16;

RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

RCC_OscInitStruct.PLL.PLLM = 8;

RCC_OscInitStruct.PLL.PLLN = 216;

RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV6;

RCC_OscInitStruct.PLL.PLLQ = 4;

HAL_RCC_OscConfig(&RCC_OscInitStruct);

RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1;

RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;

RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2);

HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

}

/* I2C1 init function */

void MX_I2C1_Init(void)

{

hi2c1.Instance = I2C1;

hi2c1.Init.ClockSpeed = 100000;

hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;

hi2c1.Init.OwnAddress1 = 0;

hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;

hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLED;

hi2c1.Init.OwnAddress2 = 0;

hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLED;

hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLED;

HAL_I2C_Init(&hi2c1);

}

/** Configure pins as

* Analog

* Input

* Output

* EVENT_OUT

* EXTI

*/

void MX_GPIO_Init(void)

{

GPIO_InitTypeDef GPIO_InitStruct;

/* GPIO Ports Clock Enable */

__GPIOA_CLK_ENABLE();

__GPIOB_CLK_ENABLE();

/*Configure GPIO pin : PA5 */

GPIO_InitStruct.Pin = GPIO_PIN_5;

GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_LOW;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}

and Is not working at all

Please Help ME

Best Regards

Herru S

#i2c

Amel NASRI · ‎2015-07-13

Posted on July 13, 2015 at 11:21

Hi setiawan.herru,

1- Please try to use the ''Format Code Block'' feature (left top) so that your code becomes easier to read and to help you.

2- I don't see the I2C clock enabled in your code.

-Mayla-

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