I'm a biginner on embedded programing and facing an I2C communication halt issue when I put HAL_I2C_Master_Seq_Transmit_IT() in HAL_GPIO_EXTI_Falling_Callback().
STM32CubeIDE: Version: 1.6.0, Build: 9614_20210223_1703 (UTC)
Target board: NUCLEO-G031K8 , Device name : STM32G03x/STM32G04x
Peripheral device : a sensor with I2C + IRQ , Vdd=3.3 from Nucleo
My situation is I've used a NUCLEO-G031K8 board connecting a sensor through I2C + IRQ signal. I2C R/W commnication itself worked well when just polling used, NO IRQ handling. Read-out data can be monitored on Tera term through USB.
Then I wanted to conduct I2C R/W when IRQ event occur. So I wrote "void HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin)" function by myself. And put the same I2C write function into the Callback function like below.
Then IRQ went low the callback function called correctly I think(checked with printf() msgs). But I2C communcation was halted just after slave address sent.( I've checked with oscilloscope.) Then No response from G0 chip afterwards even IRQ signal went low again.
One more info. I've removed the I2C function in callback function then put GPIO_Pin_toggle function instaed. Thsi GPIO control worked correctly and synced with IRQ.
So I think I'm missing something basic to make I2C start working. But I don't know.
Could you give me any advice on this sitaution?
/Mitsuru
// Code:
I've added "EXTI4_15_IRQHandler();" in main.c.
>>stm32g0xx_it.c:
void EXTI4_15_IRQHandler(void)
{
HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_15);
}
void HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin)
{
uint8_t rx_data[I2C_MAXSIZE];
if (GPIO_Pin == GPIO_PIN_15)
{
printf("HAL_GPIO_EXIT_Falling_callback: happened!\n");
I2Cdevice_Write_1byte3(ADD_dv25, dv25_reg1, 0x2F);
// converted into HAL_I2C_Master_Seq_Transmit_IT() in this func.
//HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_6);
printf("HAL_GPIO_EXIT_Falling_callback: Done!\n");
}
}
