TMS570LC4357: DIO interrupt for user button GIOA7 in TMDX570LC43HDK

Santhosh Chandramohan

Intellectual 391 points

Part Number: TMS570LC4357
Other Parts Discussed in Thread: TMDX570LC43HDK, HALCOGEN

DIO interrupt for user button GIOA7 in TMDX570LC43HDK

Enable GIO Driver

PSL should be internal pull up or pull down because the external circuit of TMDX570LC43HDK has pullup

VIM channel GIO is set HIGH.

Code

Is this gioGetBit is works in interrupt method ?

Please provide me the example if possible ?

over 4 years ago

0 QJ Wang over 4 years ago

TI__Guru**** 198766 points

When you press the button (GIOA[7]), you will get a GIO interrupt. The while() will be interrupted by GIO ISR. You can insert your code to gioNotification().

0 Santhosh Chandramohan over 4 years ago in reply to QJ Wang

Intellectual 391 points

Hi Wang,

How to use gioNotification() API ?

0 QJ Wang over 4 years ago in reply to Santhosh Chandramohan

TI__Guru**** 198766 points

Hello,

gioNotification() is a callback function of GIO ISR (located in gio.c), it is used for users to insert their own code. During execution of the notification routine for a given interrupt request, the interrupt remains disable at the CPU level (for IRQ). It is wise to have your notification routine as short as possible to avoid latency on any other pending interrupt.

The GIO interrupt is edge-sensitive (rising edge or falling edge, or both), not level-sensitive.

0 Santhosh Chandramohan over 4 years ago in reply to QJ Wang

Intellectual 391 points

Hi Wang,

Can you share me the example code which uses the gioNotification callback function of GIO ISR.

edge-sensitive (rising edge or falling edge or both ) example too. if possible.

0 QJ Wang over 4 years ago in reply to Santhosh Chandramohan

TI__Guru**** 198766 points

I've created a basic project using HALCoGen 04.07.01 that demonstrates the usage of interrupt with GIO module.

The GIO_A7 is used to detect Rising Edge on the pin. In order to make this test code standalone, I also drive the GIO_A7 as output, to create the rising edge condition.

When the interrupt condition is met, the CPU will branch to gioHighLevelInterrupt(void) in GIO.c. From there, gioNotification(gioPORTA, offset) is called. In this routine, you will write your own code. In my case, I just reset the GIO_A7 to 0.

GIO_Interrupt.zip

Arm-based microcontrollers

Arm-based microcontrollers forum

TMS570LC4357: DIO interrupt for user button GIOA7 in TMDX570LC43HDK