我用的TM4C123GH6PM,Tiva C LanunchPad。
写程序,可是一运行到下面这句,
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART1);
程序就跑飞了。
这是怎么回事呢?
我查了一下,串口1 U1Rx这个脚还有模拟功能USB0ID,U1Tx这个脚还有USB0VBUS的功能。
是不是这个复用了?谢谢!
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我用的TM4C123GH6PM,Tiva C LanunchPad。
写程序,可是一运行到下面这句,
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART1);
程序就跑飞了。
这是怎么回事呢?
我查了一下,串口1 U1Rx这个脚还有模拟功能USB0ID,U1Tx这个脚还有USB0VBUS的功能。
是不是这个复用了?谢谢!
不对呀,不是这个语句的问题,我同样用的是Tiva C LanunchPad,开头使用了这个语句,没有跑飞的现象
//***************************************************************************** // // hello.c - Simple hello world example. // // Copyright (c) 2012-2014 Texas Instruments Incorporated. All rights reserved. // Software License Agreement // // Texas Instruments (TI) is supplying this software for use solely and // exclusively on TI's microcontroller products. The software is owned by // TI and/or its suppliers, and is protected under applicable copyright // laws. You may not combine this software with "viral" open-source // software in order to form a larger program. // // THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS. // NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT // NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY // CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL // DAMAGES, FOR ANY REASON WHATSOEVER. // // This is part of revision 2.1.0.12573 of the EK-TM4C123GXL Firmware Package. // //***************************************************************************** #include <stdint.h> #include <stdbool.h> #include "inc/hw_memmap.h" #include "inc/hw_types.h" #include "driverlib/debug.h" #include "driverlib/fpu.h" #include "driverlib/gpio.h" #include "driverlib/pin_map.h" #include "driverlib/rom.h" #include "driverlib/sysctl.h" #include "driverlib/uart.h" //#include "utils/uartstdio.h" //***************************************************************************** // //! \addtogroup example_list //! <h1>Hello World (hello)</h1> //! //! A very simple ``hello world'' example. It simply displays ``Hello World!'' //! on the UART and is a starting point for more complicated applications. //! //! UART0, connected to the Virtual Serial Port and running at //! 115,200, 8-N-1, is used to display messages from this application. // //***************************************************************************** //***************************************************************************** // // The error routine that is called if the driver library encounters an error. // //***************************************************************************** #ifdef DEBUG void __error__(char *pcFilename, uint32_t ui32Line) { } #endif ////***************************************************************************** //// //// Configure the UART and its pins. This must be called before UARTprintf(). //// ////***************************************************************************** //void //ConfigureUART(void) //{ // // // // Enable the GPIO Peripheral used by the UART. // // // ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA); // // // // Enable UART0 // // // ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0); // // // // Configure GPIO Pins for UART mode. // // // ROM_GPIOPinConfigure(GPIO_PA0_U0RX); // ROM_GPIOPinConfigure(GPIO_PA1_U0TX); // ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1); // // // // Use the internal 16MHz oscillator as the UART clock source. // // // UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC); // // // // Initialize the UART for console I/O. // // // UARTStdioConfig(0, 115200, 16000000); //} //***************************************************************************** // // Print "Hello World!" to the UART on the evaluation board. // //***************************************************************************** int main(void) { //volatile uint32_t ui32Loop; // // Enable lazy stacking for interrupt handlers. This allows floating-point // instructions to be used within interrupt handlers, but at the expense of // extra stack usage. // ROM_FPULazyStackingEnable(); // // Set the clocking to run directly from the crystal. // ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN); // // Enable the GPIO port that is used for the on-board LED. // SysCtlPeripheralEnable(SYSCTL_PERIPH_UART1); ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF); // // Enable the GPIO pins for the LED (PF2 & PF3). // ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_2); // // Initialize the UART. // // ConfigureUART(); // // // // Hello! // // // UARTprintf("Hello, world!\n"); // // We are finished. Hang around doing nothing. // while(1) { // // Turn on the BLUE LED. // GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2); // // Delay for a bit. // SysCtlDelay(SysCtlClockGet() / 10 / 3); // // Turn off the BLUE LED. // GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 0); // // Delay for a bit. // SysCtlDelay(SysCtlClockGet() / 10 / 3); } }