From 32e57dac2e61e79b029593eb4d34d727bcc10678 Mon Sep 17 00:00:00 2001 From: iperry Date: Thu, 17 Dec 2009 02:37:07 +0000 Subject: Initial commit of library code, moved from leaftest repo git-svn-id: https://leaflabs.googlecode.com/svn/trunk/library@69 749a229e-a60e-11de-b98f-4500b42dc123 --- src/stm32lib/examples/SysTick/main.c | 222 +++++++++++++++++++++++++++++++++++ 1 file changed, 222 insertions(+) create mode 100755 src/stm32lib/examples/SysTick/main.c (limited to 'src/stm32lib/examples/SysTick/main.c') diff --git a/src/stm32lib/examples/SysTick/main.c b/src/stm32lib/examples/SysTick/main.c new file mode 100755 index 0000000..53f0445 --- /dev/null +++ b/src/stm32lib/examples/SysTick/main.c @@ -0,0 +1,222 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** +* File Name : main.c +* Author : MCD Application Team +* Version : V2.0.1 +* Date : 06/13/2008 +* Description : Main program body. +******************************************************************************** +* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS +* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. +* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, +* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE +* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING +* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. +*******************************************************************************/ + +/* Includes ------------------------------------------------------------------*/ +#include "main.h" +#include "platform_config.h" + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +GPIO_InitTypeDef GPIO_InitStructure; +static vu32 TimingDelay; +ErrorStatus HSEStartUpStatus; + +/* Private function prototypes -----------------------------------------------*/ +void RCC_Configuration(void); +void NVIC_Configuration(void); +void Delay(vu32 nTime); + +/* Private functions ---------------------------------------------------------*/ + +/******************************************************************************* +* Function Name : main +* Description : Main program. +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +int main(void) +{ +#ifdef DEBUG + debug(); +#endif + + /* System Clocks Configuration */ + RCC_Configuration(); + + /* Configure GPIO_LED Pin 6, Pin 7, Pin 8 and Pin 9 as Output push-pull ----*/ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; + GPIO_Init(GPIO_LED, &GPIO_InitStructure); + + /* Turn on Leds connected to GPIO_LED Pin 6 and Pin 8 */ + GPIO_Write(GPIO_LED, GPIO_Pin_6 | GPIO_Pin_8); + + /* NVIC configuration */ + NVIC_Configuration(); + + /* SysTick end of count event each 1ms with input clock equal to 9MHz (HCLK/8, default) */ + SysTick_SetReload(9000); + + /* Enable SysTick interrupt */ + SysTick_ITConfig(ENABLE); + + while (1) + { + /* Toggle leds connected to GPIO_LED Pin 6, Pin 7, Pin 8 and Pin 9 */ + GPIO_Write(GPIO_LED, (u16)~GPIO_ReadOutputData(GPIO_LED)); + + /* Insert 500 ms delay */ + Delay(500); + + /* Toggle leds connected to GPIO_LED Pin 6, Pin 7, Pin 8 and Pin 9 */ + GPIO_Write(GPIO_LED, (u16)~GPIO_ReadOutputData(GPIO_LED)); + + /* Insert 300 ms delay */ + Delay(300); + } +} + +/******************************************************************************* +* Function Name : RCC_Configuration +* Description : Configures the different system clocks. +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +void RCC_Configuration(void) +{ + /* RCC system reset(for debug purpose) */ + RCC_DeInit(); + + /* Enable HSE */ + RCC_HSEConfig(RCC_HSE_ON); + + /* Wait till HSE is ready */ + HSEStartUpStatus = RCC_WaitForHSEStartUp(); + + if(HSEStartUpStatus == SUCCESS) + { + /* Enable Prefetch Buffer */ + FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); + + /* Flash 2 wait state */ + FLASH_SetLatency(FLASH_Latency_2); + + /* HCLK = SYSCLK */ + RCC_HCLKConfig(RCC_SYSCLK_Div1); + + /* PCLK2 = HCLK */ + RCC_PCLK2Config(RCC_HCLK_Div1); + + /* PCLK1 = HCLK/2 */ + RCC_PCLK1Config(RCC_HCLK_Div2); + + /* PLLCLK = 8MHz * 9 = 72 MHz */ + RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); + + /* Enable PLL */ + RCC_PLLCmd(ENABLE); + + /* Wait till PLL is ready */ + while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) + { + } + + /* Select PLL as system clock source */ + RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); + + /* Wait till PLL is used as system clock source */ + while(RCC_GetSYSCLKSource() != 0x08) + { + } + } + + /* Enable GPIO_LED clock */ + RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIO_LED, ENABLE); +} + +/******************************************************************************* +* Function Name : NVIC_Configuration +* Description : Configures Vector Table base location. +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +void NVIC_Configuration(void) +{ +#ifdef VECT_TAB_RAM + /* Set the Vector Table base location at 0x20000000 */ + NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); +#else /* VECT_TAB_FLASH */ + /* Set the Vector Table base location at 0x08000000 */ + NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); +#endif +} + +/******************************************************************************* +* Function Name : Delay +* Description : Inserts a delay time. +* Input : nTime: specifies the delay time length, in milliseconds. +* Output : None +* Return : None +*******************************************************************************/ +void Delay(u32 nTime) +{ + /* Enable the SysTick Counter */ + SysTick_CounterCmd(SysTick_Counter_Enable); + + TimingDelay = nTime; + + while(TimingDelay != 0); + + /* Disable SysTick Counter */ + SysTick_CounterCmd(SysTick_Counter_Disable); + /* Clear SysTick Counter */ + SysTick_CounterCmd(SysTick_Counter_Clear); +} + +/******************************************************************************* +* Function Name : TimingDelay_Decrement +* Description : Decrements the TimingDelay variable. +* Input : None +* Output : TimingDelay +* Return : None +*******************************************************************************/ +void TimingDelay_Decrement(void) +{ + if (TimingDelay != 0x00) + { + TimingDelay--; + } +} + + +#ifdef DEBUG +/******************************************************************************* +* Function Name : assert_failed +* Description : Reports the name of the source file and the source line number +* where the assert_param error has occurred. +* Input : - file: pointer to the source file name +* - line: assert_param error line source number +* Output : None +* Return : None +*******************************************************************************/ +void assert_failed(u8* file, u32 line) +{ + /* User can add his own implementation to report the file name and line number, + ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ + + /* Infinite loop */ + while (1) + { + } +} +#endif + +/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ -- cgit v1.2.3