uart configuration

prabhakaran krishnan

GPIOPinConfigure(GPIO_PA0_U0RX);

GPIOPinConfigure(GPIO_PA1_U0TX);

a dont know how to select the muxing functions in lm4f120h5qr. In my uart code i saw the error from this lines.help me to solve the bugs.....

0 Petrei over 12 years ago

Guru 26105 points

Hi,

You don't provide enough information to help you: what was the error and at what stage (at compile, at link, at run/debug)?

Petrei

0 Greg Oberfield over 12 years ago

There's more to it than that - that just configures the pin function, you still have to configure the pins for their alternate function:

GPIOPintTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

Not to mention setting your UART with UARTConfigSetExpClk and enabling the UART in general with UARTEnable.

Search the forums a bit and you'll find a ton of examples on bringing up a UART.

0 Dave Robinson over 12 years ago

Genius 5695 points

Have a look here:

http://e2e.ti.com/support/microcontrollers/stellaris_arm_cortex-m3_microcontroller/f/473/t/212263.aspx

hth

Arm-based microcontrollers forum