在网上找到了两路的pwm输出，引脚是PB6,PB7,我现在想扩展到四路，怎么从其他引脚输出呀，我总是不能成功~
你在网上找到了两路的pwm输出，就是不知道怎么从其他引脚输出哈.................
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#include #include #include "inc/hw_memmap.h" #include "inc/hw_types.h" #include "driverlib/sysctl.h" #include "driverlib/rom.h" #include "driverlib/gpio.h" #include "driverlib/pwm.h" #include "driverlib/fpu.h" #include "driverlib/pin_map.h" #define GPIO_PB6_M0PWM0 0x00011804 #define GPIO_PB7_M0PWM1 0x00011C04 #define GPIO_PB4_M0PWM2 0x00011004 #define GPIO_PB5_M0PWM3 0x00011404 void PWM_init(void) { //PWM时钟配置：64分频 SysCtlPWMClockSet(SYSCTL_PWMDIV_64); //使能PWM0模块 SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB); //使能PWM0模块 SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0); //GPIO引脚配置 GPIOPinConfigure(GPIO_PB7_M0PWM1); GPIOPinConfigure(GPIO_PB6_M0PWM0); GPIOPinConfigure(GPIO_PB5_M0PWM3); GPIOPinConfigure(GPIO_PB4_M0PWM2); //配置引脚为PWM功能 GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_7); GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_6); GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_5); GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_4); //配置PWM发生器0和发生器1：加减计数不分频 PWMGenConfigure(PWM0_BASE, PWM_GEN_0,PWM_GEN_MODE_DOWN | PWM_GEN_MODE_NO_SYNC); PWMGenConfigure(PWM0_BASE, PWM_GEN_1,PWM_GEN_MODE_DOWN | PWM_GEN_MODE_NO_SYNC); //设置PWM发生器1的频率，时钟频率/pwm分频数/n,80M/64/3125=400hz PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, 3125); PWMGenPeriodSet(PWM0_BASE, PWM_GEN_1, 3125); //设置PWM0/PWM1输出的脉冲宽度 PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, 1200); PWMPulseWidthSet(PWM0_BASE, PWM_OUT_1, 1200); PWMPulseWidthSet(PWM0_BASE, PWM_OUT_2, 1200); PWMPulseWidthSet(PWM0_BASE, PWM_OUT_3, 1200); //使能PWM发生器 PWMGenEnable(PWM0_BASE, PWM_GEN_0); PWMGenEnable(PWM0_BASE, PWM_GEN_1); //使能PWM0和PWM1的输出 PWMOutputState(PWM0_BASE, (PWM_OUT_0_BIT), true); PWMOutputState(PWM0_BASE, (PWM_OUT_1_BIT), true); PWMOutputState(PWM0_BASE, (PWM_OUT_2_BIT), true); PWMOutputState(PWM0_BASE, (PWM_OUT_3_BIT), true); } void GPIOPin_init(void) { SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF); //使能启动GPIOF SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD); //使能启动GPIOD SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA); //使能启动GPIOA GPIOPinTypeGPIOInput(GPIO_PORTD_BASE,GPIO_PIN_6|GPIO_PIN_2); //设置GPIOD_PIN2、6 为输入 GPIOPinTypeGPIOInput(GPIO_PORTA_BASE,0x3C); //设置GPIOA_PIN2-7 为输入 GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE,GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4); GPIODirModeSet(GPIO_PORTD_BASE,GPIO_PIN_6|GPIO_PIN_2,GPIO_DIR_MODE_IN); GPIODirModeSet(GPIO_PORTA_BASE,0x3C,GPIO_DIR_MODE_IN); GPIOPadConfigSet(GPIO_PORTD_BASE,GPIO_PIN_6|GPIO_PIN_2,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);//上拉 GPIOPadConfigSet(GPIO_PORTA_BASE,0x3C,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU); } void StartElCo(void) { uint32_t h0=1250,h1=1250,h2=1250,h3=1250,i; SysCtlDelay(48000000);//2s for(i=0;i<4;i++) { SysCtlDelay(2400000); //100ms if(h0<1643) { h0+=110; h1+=110; h2+=110; h3+=110; } if(h0>=1643) { h0=1643; h1=1643; h2=1643; h3=1643; } PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, h0); PWMPulseWidthSet(PWM0_BASE, PWM_OUT_1, h1); PWMPulseWidthSet(PWM0_BASE, PWM_OUT_2, h2); PWMPulseWidthSet(PWM0_BASE, PWM_OUT_3, h3); } // SysCtlDelay(24000000); //1s } int main(void) { //系统和时钟设置 SysCtlClockSet(SYSCTL_SYSDIV_2_5|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN); PWM_init(); //PWM中断 StartElCo(); //启动电调 while(1); }
#include
#include
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/sysctl.h"
#include "driverlib/rom.h"
#include "driverlib/gpio.h"
#include "driverlib/pwm.h"
#include "driverlib/fpu.h"
#include "driverlib/pin_map.h"
#define GPIO_PB6_M0PWM0 0x00011804
#define GPIO_PB7_M0PWM1 0x00011C04
#define GPIO_PB4_M0PWM2 0x00011004
#define GPIO_PB5_M0PWM3 0x00011404
void PWM_init(void)
{
//PWM时钟配置：64分频
SysCtlPWMClockSet(SYSCTL_PWMDIV_64);
//使能PWM0模块
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
//使能PWM0模块
SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);
//GPIO引脚配置
GPIOPinConfigure(GPIO_PB7_M0PWM1);
GPIOPinConfigure(GPIO_PB6_M0PWM0);
GPIOPinConfigure(GPIO_PB5_M0PWM3);
GPIOPinConfigure(GPIO_PB4_M0PWM2);
//配置引脚为PWM功能
GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_7);
GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_6);
GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_5);
GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_4);
//配置PWM发生器0和发生器1：加减计数不分频
PWMGenConfigure(PWM0_BASE, PWM_GEN_0,PWM_GEN_MODE_DOWN | PWM_GEN_MODE_NO_SYNC);
PWMGenConfigure(PWM0_BASE, PWM_GEN_1,PWM_GEN_MODE_DOWN | PWM_GEN_MODE_NO_SYNC);
//设置PWM发生器1的频率，时钟频率/pwm分频数/n,80M/64/3125=400hz
PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, 3125);
PWMGenPeriodSet(PWM0_BASE, PWM_GEN_1, 3125);
//设置PWM0/PWM1输出的脉冲宽度
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, 1200);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_1, 1200);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_2, 1200);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_3, 1200);
//使能PWM发生器
PWMGenEnable(PWM0_BASE, PWM_GEN_0);
PWMGenEnable(PWM0_BASE, PWM_GEN_1);
//使能PWM0和PWM1的输出
PWMOutputState(PWM0_BASE, (PWM_OUT_0_BIT), true);
PWMOutputState(PWM0_BASE, (PWM_OUT_1_BIT), true);
PWMOutputState(PWM0_BASE, (PWM_OUT_2_BIT), true);
PWMOutputState(PWM0_BASE, (PWM_OUT_3_BIT), true);
}
void GPIOPin_init(void)
{
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF); //使能启动GPIOF
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD); //使能启动GPIOD
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA); //使能启动GPIOA
GPIOPinTypeGPIOInput(GPIO_PORTD_BASE,GPIO_PIN_6|GPIO_PIN_2); //设置GPIOD_PIN2、6 为输入
GPIOPinTypeGPIOInput(GPIO_PORTA_BASE,0x3C); //设置GPIOA_PIN2-7 为输入
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE,GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4);
GPIODirModeSet(GPIO_PORTD_BASE,GPIO_PIN_6|GPIO_PIN_2,GPIO_DIR_MODE_IN);
GPIODirModeSet(GPIO_PORTA_BASE,0x3C,GPIO_DIR_MODE_IN);
GPIOPadConfigSet(GPIO_PORTD_BASE,GPIO_PIN_6|GPIO_PIN_2,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);//上拉
GPIOPadConfigSet(GPIO_PORTA_BASE,0x3C,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);
}
void StartElCo(void)
{
uint32_t h0=1250,h1=1250,h2=1250,h3=1250,i;
SysCtlDelay(48000000);//2s
for(i=0;i<4;i++)
{
SysCtlDelay(2400000); //100ms
if(h0<1643)
{
h0+=110;
h1+=110;
h2+=110;
h3+=110;
}
if(h0>=1643)
{
h0=1643;
h1=1643;
h2=1643;
h3=1643;
}
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, h0);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_1, h1);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_2, h2);
PWMPulseWidthSet(PWM0_BASE, PWM_OUT_3, h3);
}
// SysCtlDelay(24000000); //1s
}
int main(void)
{
//系统和时钟设置
SysCtlClockSet(SYSCTL_SYSDIV_2_5|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);
PWM_init(); //PWM中断
StartElCo(); //启动电调
while(1);
}
每个引脚的复用功能不同，最好看一看TM4的datasheet
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