Posted on September 16, 2015 at 11:22Hi, I am attempting to have interrupts for overflow and underflow of `float` variables by implementing the FPU_IRQHandler function and enabling the interrupts.
Using disassebly & OpenOCD debugger I can see that
vadd.f32
instruction is called. In the debugger I can see that the fl value of my loop goes to ''inf'':
float fl = 2;
while (1) {
fl = fl *2;
}
And I enable the interrupts like this:
__HAL_SYSCFG_INTERRUPT_ENABLE(HAL_SYSCFG_IT_FPU_IOC); /*!< Floating Point Unit Invalid operation Interrupt */
__HAL_SYSCFG_INTERRUPT_ENABLE(HAL_SYSCFG_IT_FPU_DZC); /*!< Floating Point Unit Divide-by-zero Interrupt */
__HAL_SYSCFG_INTERRUPT_ENABLE(HAL_SYSCFG_IT_FPU_UFC); /*!< Floating Point Unit Underflow Interrupt */
__HAL_SYSCFG_INTERRUPT_ENABLE(HAL_SYSCFG_IT_FPU_OFC); /*!< Floating Point Unit Overflow Interrupt */
__HAL_SYSCFG_INTERRUPT_ENABLE(HAL_SYSCFG_IT_FPU_IDC); /*!< Floating Point Unit Input denormal Interrupt */
__HAL_SYSCFG_INTERRUPT_ENABLE(HAL_SYSCFG_IT_FPU_IXC); /*!< Floating Point Unit Inexact Interrupt */
Yet FPU_IRQHandler is never called during the infinte loop. Setting a breakpoint in FPU_IRQHandler with the debugger doesn't break the program.
#interrupts #interrupts #stm32f3 #fpu #fpu #cube #hal
