How to specify external interrupt rather than event
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‎2015-06-15 1:41 AM
Posted on June 15, 2015 at 10:41 Hi, Using the cube 4.8.0 I configured PA2 to be GPIO_EXTI2 because I want an interrupt generated when the signal connected to that pin goes low but the code that gets generated for me looks like this: /*Configure GPIO pin : PA2 */ GPIO_InitStruct.Pin = GPIO_PIN_2; GPIO_InitStruct.Mode = GPIO_MODE_EVT_RISING; GPIO_InitStruct.Pull = GPIO_NOPULL; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); I want the mode to be GPIO_MODE_IT_FALLING but I can't find any way of telling the cube that. Is the GUI missing something, or am I just thick? Cheers, Mark
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‎2015-06-15 2:05 AM
Posted on June 15, 2015 at 11:05
Hi, the answer is
1) select Cofigration tab 2) push GPIO button 3) select PA2 4) select GPIO mode - External Interrupt Mode with Falling edge trigger detection 5) push NVIC button (from Configuration tab) 6) enable ''EXTI line 2 and line 3 interrupts'' 7) implement HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) Note: GPIO_Pin is GPIO_PIN_2Options
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‎2015-06-15 2:50 AM
Posted on June 15, 2015 at 11:50 Many thanks for the swift reply. I thought it would be something like that. The problem is that the section of the configuration dialog that lets you specify the GPIO pin mode is not visible when I run the cube using Linux Java. If I run the same version of the cube using Wine then I can see the option to change the GPIO mode. So it's a problem with the GUI when running the cube using Linux Java. Cheers, Mark
