cancel
Showing results for 
Search instead for 
Did you mean: 

How to monitor status of I2C using HAL

JB.16
Associate

Hello

I am using NUCLEO-G431KB to talk to a sensor using i2c.

Its working nicely using the 'HAL_I2C_Master_Transmit' HAL function.

I would like the system to generate an error if an ack is not received from the sensor.

This is the working code:

HAL_I2C_Master_Transmit(&hi2c1, 0xC8, data, 1, 100); 

 HAL_I2C_Master_Receive(&hi2c1, 0xC8, aRxBuffer, 2, 100); 

st example code shows checking hal_ok, but i cant find any info on what hal_ok means.

Also when running this code it seems to endlessly transmit in the while loop. which I dont want.

I would really appreciate any help 🙂

while (HAL_I2C_Master_Transmit(&hi2c1, (uint16_t)I2C_ADDRESS, (uint8_t *)aTxBuffer, TXBUFFERSIZE, 10000) != HAL_OK)

 {

   /* Error_Handler() function is called when Timeout error occurs.

      When Acknowledge failure occurs (Slave don't acknowledge its address)

      Master restarts communication */

   if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)

   {

     Error_Handler();

   }

 }

1 REPLY 1
KnarfB
Principal III

Luckily, all source code is available, so you easily check the implementation of HAL_I2C_Master_Transmit()