STM8S系列单片机开发环境应用快速入门 -

/*============================================================================*/
/* PROJECT: LED Control by timer OC */
/* MODULE: main.c */
/* COMPILER: STM8 Cosmic C Compiler */
/* DATE: Feb 2009 */
/*----------------------------------------------------------------------------*/
/* DESCRIPTION: Demonstration firmware for STM8 Mini Kit */
/* Control LED blink, on/off/, brightness. */
/*============================================================================*/
/******************************************************************************
*
* 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.
*
* COPYRIGHT 2008 STMicroelectronics
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm8s207r.h" /* Registers and memory mapping file. */
/******************************************************************************/
/* Macro definitions
/******************************************************************************/
/******************************************************************************/
/* RAM SEGMENT variables */
/******************************************************************************/
/* Global variable used to store the ADC result. */
unsigned int AD_Value;
/******************************************************************************/
/* Function definitions */
/******************************************************************************/
/* -------------------------------------------------------------------------- */
/* ROUTINE NAME: LED_Control */
/* INPUT/OUTPUT: Note duration (4bit MSB information) / None. */
/* DESCRIPTION: 1) Sample AIN voltage and store in AD_Value. */
/* 2) Polling wait routine for note duration(based on 3ms delay).*/
/* duration: Quaver (2), crotchet (4) or minim (8) selection. */
/* ---------------------------------------------------------------------------*/
void LED_Control(unsigned char duration)
{
int i = 0;
unsigned char uc = 0;
unsigned long Temp;
/* Sample AIN voltage in ADC single mode */
ADC_CR1 |= 0x01; /* First set ADON to power on the ADC module. */
i = 6; /* Wait >7us to ensure the ADC power on finished.*/
while(i--);
ADC_CR1 |= 0x01; /* Set ADON again to start AD convert. */
while(!(ADC_CSR & 0x80));/* Waiting for AD convert finished (EOP=1). */
/* Store ADC value to AD_Value */
AD_Value = ((((unsigned int)ADC_DRH)<<2)+ADC_DRL);
/* The new duty cycle value is written in CCR. */
TIM2_CCR2H=0x00;
TIM2_CCR2L=(unsigned char)(AD_Value>>2);
if (AD_Value>0x10)
{
Temp=(unsigned char)(AD_Value>>8);
if ((TIM3_ARRH>Temp+0x05)||(TIM3_ARRH<Temp-0x05))
{
TIM3_ARRH = Temp;
TIM3_ARRL = (unsigned char)(AD_Value&0xff);
TIM3_CCR1H = (unsigned char)(AD_Value>>9);
TIM3_CCR1L = (unsigned char)((AD_Value>>1)&0xff);
}
}
/* Delay time = duration * Y */
while ( uc < duration ) /* The following loop is run "duration" times. */
{
while ( i < 1200 ) /* This loop "Y" waits approximately 4.3ms. */
{
i++;
}
i = 0;
uc++;
}
}
/* -------------------------------------------------------------------------- */
/* ROUTINE NAME: GPIO_Init */
/* INPUT/OUTPUT: None. */
/* DESCRIPTION: Initialize GPIOs. */
/* IN: None. */
/* OUT: None. */
/* -------------------------------------------------------------------------- */
void GPIO_Init(void)
{
/* LED IO Configuration */
/* LD3: PD3 */
/* LD2: PD1 */
/* LD1: PD0 */
PD_DDR |= 0x0D; /* Output. */
PD_CR1 |= 0x0D; /* PushPull. */
PD_CR2 = 0x00; /* Output speed up to 2MHz. */
/* PD7 external interrupt */
EXTI_CR1 = 0x00;
EXTI_CR2 = 0x00;
PD_DDR &=~0x80;
PD_CR2 |= 0x80;
}
/* -------------------------------------------------------------------------- */
/* ROUTINE NAME: CLK_Init */
/* INPUT/OUTPUT: None. */
/* DESCRIPTION: Initialize the clock source */
/* -------------------------------------------------------------------------- */
void CLK_Init(void)
{
/* Configure HSI prescaler*/
CLK_CKDIVR &= ~0x10; /* 01: fHSI= fHSI RC output/2. */
/* Configure CPU clock prescaler */
CLK_CKDIVR |= 0x01; /* 001: fCPU=fMASTER/2. */
}
/* -------------------------------------------------------------------------- */
/* ROUTINE NAME: ADC_Init */
/* INPUT/OUTPUT: None. */
/* DESCRIPTION: Initialize the AD converter. */
/* -------------------------------------------------------------------------- */
void ADC_Init(void)
{
ADC_CR2 = 0x00;
ADC_CR1 = 0x00;
ADC_CSR = 0x03;
ADC_TDRL = 0x20;
}
/* -------------------------------------------------------------------------- */
/* ROUTINE NAME: TIM_Init */
/* INPUT/OUTPUT: None. */
/* DESCRIPTION: Initialize the TIM2 TIM3. */
/* -------------------------------------------------------------------------- */
void TIM_Init(void)
{
/* TIM2 CC2 control LED Brightness */
TIM2_CCMR2 |= 0x70; /* Output mode PWM2. */
TIM2_CCER1 |= 0x30; /* CC polarity low,enable PWM output */
TIM2_ARRH = 0x00;
TIM2_ARRL = 0xff; /* Freq control register: ARR */
TIM2_CCR2 = 0x00; /* Dutycycle control register: CCR */
TIM2_PSCR = 0x00; /* Configure TIM2 prescaler =1 */
TIM2_CR1 |= 0x01;
/* TIM3 CC1 control LED Blinking */
TIM3_CCMR1 |= 0x78; /* Output mode PWM2. */
TIM3_CCER1 |= 0x03; /* CC polarity low,enable PWM output */
TIM3_ARRH = 0x03;
TIM3_ARRL = 0xff; /* Freq control register: ARR */
TIM3_CCR1H = 0x02; /* Dutycycle control register: CCR */
TIM3_CCR1L = 0x00;
TIM3_PSCR |= 0x0d; /* Configure TIM3 prescaler = 8192 */
TIM3_CR1 |= 0x81;
}
/* -------------------------------------------------------------------------- */
/* ROUTINE: main */
/* main entry */
/* -------------------------------------------------------------------------- */
void main ( void )
{
unsigned int j;
_asm("sim"); /* Disable interrupts */
CLK_Init();
GPIO_Init();
TIM_Init();
ADC_Init();
_asm("rim");
while ( 1 )
{
LED_Control(0x08);
}
}
/*---------------------------- End of file -----------------------------------*/

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