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Forum Post: RE: CCS/MSP432P401R: systick_interrupt_gpio_blink Example Only Works After Reset

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[quote user="Hunter Long61"]The systick_interrupt_gpio_blink example project found under the Driver Library examples in MSP432Ware works great for me with the Launchpad development board. The little LED blinks as it should. However, we have a board we designed with the MSP432 on it that we are debugging with a MSP-FET . With this board, the same program doesn't work. For some reason the SysTick_Handler() function never gets called.[/quote]I tried to repeat this, using a MSP-EXP432P401R Rev 2.0 using a MSP-FET and MSP-FET-432ADPTR . I couldn't repeat the problem, in that when debugging with a MSP-FET the systick_interrupt_gpio_blink example is toggling the LED when SysTick_Handler() is called. When using the MSP-FET one difference I noticed is that the msp432p401r .gel script isn't reporting any output, whereas when using a XDS110 the msp432p401r .gel script reports output to the CCS console. Looking at the msp432p401r .gel script it takes different behavior when a MSP-FET is being used. E.g. when a MSP-FET is used the msp432p401r .gel doesn't perform a System Reset in OnPreFileLoaded(). Maybe this is why you found checking "Reset the target on a program load or restart" made a difference. Also, what software are you using? I was using CCS 7.0.0.00042 with MSP Debug Probe drivers 7.0.5 (which includes MSPDebugStack 3.9.1.2)

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