调用方式
- /**************************************************************************//**
- * @file main.c
- * @version V3.00
- * @brief DS18B20 Driver Sample Code
- *
- * [url=home.php?mod=space&uid=17282]@CopyRight[/url] (C) 2013~2015 Nuvoton Technology Corp. All rights reserved.
- *
- ******************************************************************************/
- #include "stdio.h"
- #include "NuMicro.h"
- #define PLL_CLOCK 192000000
- int16_t DS18B20_ReadTemperature(void);
- void SYS_Init(void)
- {
- /* Set XT1_OUT(PF.2) and XT1_IN(PF.3) to input mode */
- PF->MODE &= ~(GPIO_MODE_MODE2_Msk | GPIO_MODE_MODE3_Msk);
- /* Enable HXT clock (external XTAL 12MHz) */
- CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
- /* Wait for HXT clock ready */
- CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
- /* Set core clock as PLL_CLOCK from PLL */
- CLK_SetCoreClock(PLL_CLOCK);
- /* Set PCLK0/PCLK1 to HCLK/2 */
- CLK->PCLKDIV = (CLK_PCLKDIV_APB0DIV_DIV2 | CLK_PCLKDIV_APB1DIV_DIV2);
- CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLKSEL_LXT);
-
-
- /* Enable UART module clock */
- CLK_EnableModuleClock(UART0_MODULE);
- /* Select UART module clock source as HXT and UART module clock divider as 1 */
- CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HXT, CLK_CLKDIV0_UART0(1));
- /* Set GPB multi-function pins for UART0 RXD and TXD */
- SYS->GPB_MFPH &= ~(SYS_GPB_MFPH_PB12MFP_Msk | SYS_GPB_MFPH_PB13MFP_Msk);
- SYS->GPB_MFPH |= (SYS_GPB_MFPH_PB12MFP_UART0_RXD | SYS_GPB_MFPH_PB13MFP_UART0_TXD);
-
- SystemCoreClockUpdate();
- }
- void UART0_Init()
- {
- /* Configure UART0 and set UART0 baud rate */
- UART_Open(UART0, 115200);
- }
- int32_t main(void)
- {
- float t;
- /* 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();
- printf("\n\nCPU [url=home.php?mod=space&uid=72445]@[/url] %dHz\n", SystemCoreClock);
- printf("+-------------------------------------------------+\n");
- printf("| PH.0(Output) and PG.15(Input) Sample Code |\n");
- printf("+-------------------------------------------------+\n\n");
- /* Configure PH.0 as Output mode and PG.15 as Input mode then close it */
- GPIO_SetMode(PH, BIT0, GPIO_MODE_OUTPUT);
- GPIO_SetMode(PG, BIT15, GPIO_MODE_INPUT);
- GPIO_SetMode(PB, BIT2, GPIO_MODE_QUASI);
-
- while(1)
- {
- PH0=1;
- CLK_SysTickDelay(1000000);
- PH0=0;
- CLK_SysTickDelay(1000000);
- t = DS18B20_ReadTemperature() * 0.0625;
- printf("\n%f\n", t);
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
-
-
- }
- }
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