스마트홈
[Firmware] M058 - gpio_output/input
hyeok0724.kim@gmail.com
2019. 5. 3. 15:13
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[설명]
- P3.2의 pin에 switch를 연결하고 P0.3에 LED를 연결함
- switch를 On/Off에 따라 LED가 켜지고 꺼짐
[기본코드]
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#include <stdio.h>
#include "M051Series.h"
#define PLL_CLOCK 50000000
void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Enable Internal RC 22.1184MHz clock */
CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk);
/* Waiting for Internal RC clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk);
/* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));
/* Set core clock as PLL_CLOCK from PLL */
CLK_SetCoreClock(PLL_CLOCK);
/* Enable UART module clock */
CLK_EnableModuleClock(UART0_MODULE);
/* Select UART module clock source */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_PLL, CLK_CLKDIV_UART(1));
/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/
/* Set P3 multi-function pins for UART0 RXD and TXD */
SYS->P3_MFP &= ~(SYS_MFP_P30_Msk | SYS_MFP_P31_Msk);
SYS->P3_MFP |= (SYS_MFP_P30_RXD;
}
int main(void)
{
/* Unlock protected registers */
SYS_UnlockReg();
/* Init System, peripheral clock and multi-function I/O */
SYS_Init();
/* Lock protected registers */
SYS_LockReg();
/* Init UART0 for printf */
UART0_Init();
GPIO_SetMode(P0, BIT3, GPIO_PMD_OUTPUT); //Water LED
P03 = 0;
GPIO_SetMode(P3, BIT2, GPIO_PMD_INPUT); //Timer Switch
while(1)
{
if(P32 != 1)
{
P03 = 1;
}
else
{
P03 = 0;
}
}
}
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