程式中使用的"#define Dummy 0x00"設定，是因為SPI的Clock是由MCU產生，STM8S是標準4線式的SPI介面，SI與SO pin可以同時做輸入與輸出的動作，當要使用SPI介面讀取其他IC的值時只要給MCU的"SPI->DR"暫存器一個Dummy的值就會產生SPI Read時所需要的Clock。
1. 整個project的程式檔案目錄如下圖所示.
2. main.c
/***********************************************/#include "stm8s_003x.h"
#include "stm8s_type.h"
#include "gpio.h"
#include "spi.h"
#define Dummy 0x00 //for SPI Clock
u8 ReadData;
int main(void)
{
enableInterrupts(); //InterruptInit
GPIOE_Init();
SPI_Init();
GPIOE->ODR &= ~(0x20); //NSS(CS) pull low.
SPI_IO(0xAA); //SPI write data
ReadData = SPI_IO(Dummy); //SPI read data
GPIOE->ODR |= 0x20; //NSS(CS) pull high.
return 0;
}
/***********************************************/
3. gpio.c
/***********************************************/#include "stm8s_003x.h"
#include "stm8s_type.h"
#include "gpio.h"
void GPIOE_Init(void)
{
GPIOE->DDR |= 0x20;
GPIOE->CR1 |= 0x20;
GPIOE->CR2 |= 0x00;
}
/***********************************************/
4. spi.c
/***********************************************/#include "stm8s_003x.h"
#include "stm8s_type.h"
#include "spi.h"
void SPI_Init(void)
{
SPI->CR1 |= 0x07; //Master configuration
SPI->CR2 |= 0x03; //Master mode, Software slave management enabled.
SPI->CR1 |= 0x40; //SPI enable
GPIOE->ODR |= 0x20; //NSS(CS) pull high.
}
u8 SPI_IO(u8 OutputData)
{
u8 InputData;
while(! (SPI->SR & 0x02)); //Transmit buffer empty.
SPI->DR = OutputData; //Output Data.
while(! (SPI->SR & 0x01)); //Receive buffer not empty.
InputData = SPI->DR; //Input Data.
return InputData; //Input Data.
}
/***********************************************/
5. stm8_interrupt_vector.c
/***********************************************//* BASIC INTERRUPT VECTOR TABLE FOR STM8 devices
* Copyright (c) 2007 STMicroelectronics
*/
typedef void @far (*interrupt_handler_t)(void);
struct interrupt_vector {
unsigned char interrupt_instruction;
interrupt_handler_t interrupt_handler;
};
@far @interrupt void NonHandledInterrupt (void)
{
/* in order to detect unexpected events during development,
it is recommended to set a breakpoint on the following instruction
*/
return;
}
extern void _stext(); /* startup routine */
struct interrupt_vector const _vectab[] = {
{0x82, (interrupt_handler_t)_stext}, /* reset */
{0x82, NonHandledInterrupt}, /* trap */
{0x82, NonHandledInterrupt}, /* irq0 */
{0x82, NonHandledInterrupt}, /* irq1 */
{0x82, NonHandledInterrupt}, /* irq2 */
{0x82, NonHandledInterrupt}, /* irq3 */
{0x82, NonHandledInterrupt}, /* irq4 */
{0x82, NonHandledInterrupt}, /* irq5 */
{0x82, NonHandledInterrupt}, /* irq6 */
{0x82, NonHandledInterrupt}, /* irq7 */
{0x82, NonHandledInterrupt}, /* irq8 */
{0x82, NonHandledInterrupt}, /* irq9 */
{0x82, NonHandledInterrupt}, /* irq10 */
{0x82, NonHandledInterrupt}, /* irq11 */
{0x82, NonHandledInterrupt}, /* irq12 */
{0x82, NonHandledInterrupt}, /* irq13 */
{0x82, NonHandledInterrupt}, /* irq14 */
{0x82, NonHandledInterrupt}, /* irq15 */
{0x82, NonHandledInterrupt}, /* irq16 */
{0x82, NonHandledInterrupt}, /* irq17 */
{0x82, NonHandledInterrupt}, /* irq18 */
{0x82, NonHandledInterrupt}, /* irq19 */
{0x82, NonHandledInterrupt}, /* irq20 */
{0x82, NonHandledInterrupt}, /* irq21 */
{0x82, NonHandledInterrupt}, /* irq22 */
{0x82, NonHandledInterrupt}, /* irq23 */
{0x82, NonHandledInterrupt}, /* irq24 */
{0x82, NonHandledInterrupt}, /* irq25 */
{0x82, NonHandledInterrupt}, /* irq26 */
{0x82, NonHandledInterrupt}, /* irq27 */
{0x82, NonHandledInterrupt}, /* irq28 */
{0x82, NonHandledInterrupt}, /* irq29 */
};
/***********************************************/
6. gpio.h
/***********************************************/#include "stm8s_type.h"
void GPIOE_Init(void);
/***********************************************/
7. spi.h
/***********************************************/#include "stm8s_type.h"
void SPI_Init(void);
u8 SPI_IO(u8 OutputData);
/***********************************************/
8. stm8s_003x.h
/***********************************************//* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM8_003x_H
#define __STM8_003x_H
#include "stm8s_type.h"
/******************************************************************************/
/* Library configuration section */
/******************************************************************************/
/******************************************************************************/
/* Peripherals Base Address */
/******************************************************************************/
#define GPIOA_BaseAddress 0x5000
#define GPIOB_BaseAddress 0x5005
#define GPIOC_BaseAddress 0x500A
#define GPIOD_BaseAddress 0x500F
#define GPIOE_BaseAddress 0x5014
#define GPIOF_BaseAddress 0x5019
#define FLASH_BaseAddress 0x505A
#define ITC_BaseAddress 0x50A0
#define RST_BaseAddress 0x50B3
#define CLK_BaseAddress 0x50C3
#define WWDG_BaseAddress 0x50D1
#define IWDG_BaseAddress 0x50E0
#define AWU_BaseAddress 0x50F0
#define BEEP_BaseAddress 0x50F3
#define SPI_BaseAddress 0x5200
#define I2C_BaseAddress 0x5210
#define UART1_BaseAddress 0x5230
#define TIM1_BaseAddress 0x5250
#define TIM2_BaseAddress 0x5300
#define TIM4_BaseAddress 0x5340
#define ADC1_BaseAddress 0x53E0
/******************************************************************************/
/* Peripherals declarations */
/******************************************************************************/
#define GPIOA ((GPIO_TypeDef *) GPIOA_BaseAddress)
#define GPIOB ((GPIO_TypeDef *) GPIOB_BaseAddress)
#define GPIOC ((GPIO_TypeDef *) GPIOC_BaseAddress)
#define GPIOD ((GPIO_TypeDef *) GPIOD_BaseAddress)
#define GPIOE ((GPIO_TypeDef *) GPIOE_BaseAddress)
#define GPIOF ((GPIO_TypeDef *) GPIOF_BaseAddress)
#define FLASH ((FLASH_TypeDef *) FLASH_BaseAddress)
#define ITC ((ITC_TypeDef *) ITC_BaseAddress)
#define RST ((RST_TypeDef *) RST_BaseAddress)
#define CLK ((CLK_TypeDef *) CLK_BaseAddress)
#define WWDG ((WWDG_TypeDef *) WWDG_BaseAddress)
#define IWDG ((IWDG_TypeDef *) IWDG_BaseAddress)
#define AWU ((AWU_TypeDef *) AWU_BaseAddress)
#define BEEP ((BEEP_TypeDef *) BEEP_BaseAddress)
#define SPI ((SPI_TypeDef *) SPI_BaseAddress)
#define I2C ((I2C_TypeDef *) I2C_BaseAddress)
#define UART1 ((UART1_TypeDef *) UART1_BaseAddress)
#define TIM1 ((TIM1_TypeDef *) TIM1_BaseAddress)
#define TIM2 ((TIM2_TypeDef *) TIM2_BaseAddress)
#define TIM4 ((TIM4_TypeDef *) TIM4_BaseAddress)
#define ADC1 ((ADC1_TypeDef *) ADC1_BaseAddress)
/******************************************************************************/
/* IP registers structures */
/******************************************************************************/
#define enableInterrupts() {_asm("rim\n");} /* enable interrupts */
#define disableInterrupts() {_asm("sim\n");} /* disable interrupts */
/* @brief General Purpose I/Os (GPIO) */
typedef struct GPIO_struct
{
vu8 ODR; /*!< Output Data Register */
vu8 IDR; /*!< Input Data Register */
vu8 DDR; /*!< Data Direction Register */
vu8 CR1; /*!< Configuration Register 1 */
vu8 CR2; /*!< Configuration Register 2 */
}GPIO_TypeDef;
/* @brief Serial Peripheral Interface (SPI) */
typedef struct SPI_struct
{
vu8 CR1; /*!< SPI control register 1 */
vu8 CR2; /*!< SPI control register 2 */
vu8 ICR; /*!< SPI interrupt control register */
vu8 SR; /*!< SPI status register */
vu8 DR; /*!< SPI data I/O register */
vu8 CRCPR; /*!< SPI CRC polynomial register */
vu8 RXCRCR; /*!< SPI Rx CRC register */
vu8 TXCRCR; /*!< SPI Tx CRC register */
}SPI_TypeDef;
#endif /* __STM8S_003x_H */
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
9. stm8s_type.h
/***********************************************//**
******************************************************************************
* @file stm8s_type.h
* @brief This file contains all common data types.
* @author STMicroelectronics - MCD Application Team
* @version V1.1.1
* @date 06/05/2009
******************************************************************************
*
* 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.
*
* <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>
* @image html logo.bmp
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM8S_TYPE_H
#define __STM8S_TYPE_H
/* Includes ------------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
typedef signed long s32;
typedef signed short s16;
typedef signed char s8;
typedef signed long const sc32; /* Read Only */
typedef signed short const sc16; /* Read Only */
typedef signed char const sc8; /* Read Only */
typedef volatile signed long vs32;
typedef volatile signed short vs16;
typedef volatile signed char vs8;
typedef volatile signed long const vsc32; /* Read Only */
typedef volatile signed short const vsc16; /* Read Only */
typedef volatile signed char const vsc8; /* Read Only */
typedef unsigned long u32;
typedef unsigned short u16;
typedef unsigned char u8;
typedef unsigned long const uc32; /* Read Only */
typedef unsigned short const uc16; /* Read Only */
typedef unsigned char const uc8; /* Read Only */
typedef volatile unsigned long vu32;
typedef volatile unsigned short vu16;
typedef volatile unsigned char vu8;
typedef volatile unsigned long const vuc32; /* Read Only */
typedef volatile unsigned short const vuc16; /* Read Only */
typedef volatile unsigned char const vuc8; /* Read Only */
typedef enum
{
FALSE = 0,
TRUE = !FALSE
}bool;
typedef enum
{
RESET = 0,
SET = !RESET
}FlagStatus, ITStatus, BitStatus;
typedef enum
{
DISABLE = 0,
ENABLE = !DISABLE
}FunctionalState;
#define IS_FUNCTIONALSTATE_OK(VALUE) ( (VALUE == ENABLE) || (VALUE == DISABLE) )
typedef enum
{
ERROR = 0,
SUCCESS = !ERROR
}ErrorStatus;
#define U8_MAX ((u8)255)
#define S8_MAX ((s8)127)
#define S8_MIN ((s8)-128)
#define U16_MAX ((u16)65535u)
#define S16_MAX ((s16)32767)
#define S16_MIN ((s16)-32768)
#define U32_MAX ((u32)4294967295uL)
#define S32_MAX ((s32)2147483647)
#define S32_MIN ((s32)-2147483648)
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
#endif /* __STM8S_TYPE_H */
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
/***********************************************/
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