How to program and verify GPIO in C665x processor ?
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The User LEDs in the TMS320C6657 (or in C665x family) are controlled by FPGA interfaced with C665x processor and not directly controlled by the GPIO. They can be controlled by API.
GPIO from processor are present in 80 PIN header in EVM, kindly refer the EVM schematic -> https://www.einfochips.com/wp-content/uploads/2016/04/C6657_EVM_SCH_16_00132_02.pdf
GPIO mentioned in the TI-RTOS SDK controls the GPIO in the hearder and it does not control the User LEDS.