Hi Masoud, Thanks for response. [quote userid="566507" url="~/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1488780/tms320f28388s-facing-issue-to-interface-ads131m08-adc-chip-with-ti-micro-tms320f28388s/5765680#5765680"]don't[/quote] Interrupt_enable(GPIO_INT_XINT1); is there in line number 142. [quote userid="566507" url="~/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1488780/tms320f28388s-facing-issue-to-interface-ads131m08-adc-chip-with-ti-micro-tms320f28388s/5765680#5765680"]I'm also suggesting to lower the SPI clock for debugging purposes to make sure the readiness of read immediately after FIFO writing.[/quote] I already tried with spi clock of 2MHZ without any success. [quote userid="566507" url="~/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1488780/tms320f28388s-facing-issue-to-interface-ads131m08-adc-chip-with-ti-micro-tms320f28388s/5765680#5765680"]I see you have commented the clear interrupt flag for DRDY ISR. You have to have correct call here.[/quote] Interrupt_clearACKGroup(INTERRUPT_ACK_GROUP1) did same task as C2000 driverlib doesn't have XINT_clearInterruptFlag(GPIO_INT_XINT1) command. If anything more information required , please tell me. Regards, Ramakrishna
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