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[Help]Problem about GPIO in dm6467t

qimin mo
Prodigy 125 points
Hardware: dm6467 1Ghz
software: DVSDK_3_10

I want to use GPIO40 as GPIO,
Below is my test code,is it right?
 

davinci_cfg_reg(DM646X_CIR_UART2);
gpio_request(40, "GPIO40");
gpio_direction_output(40,1);


thanks for you help.