哪位大神帮我看看SPI通信，正点原子SPI程序改的，但输出一直不对-xiedonghui258的回答

哪位大神帮我看看SPI通信，正点原子SPI程序改的，但输出一直不对

2019-07-21 01:22发布

我是想用SPI控制数字电位器，电位器型号TPL0501，配置的是SPI1，但电位器电压输出一直不对，是乱的和给的芯片手册上不一致，有哪位大神帮忙指导一下吧

[mw_shl_code=c,true]spi.c

void SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
  SPI_InitTypeDef  SPI_InitStructure;

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );//PORTBÊ±ÖÓÊ¹ÄÜ
RCC_APB2PeriphClockCmd( RCC_APB2Periph_SPI1,  ENABLE );//SPI2Ê±ÖÓÊ¹ÄÜ

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //PA4/5/7¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);//³õÊ¼»¯GPIOA

// GPIO_SetBits(GPIOA,GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_7);  //PB13/14/15ÉÏÀ

SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //ÉèÖÃSPIµ¥Ïò»òÕßË«ÏòµÄÊý¾ÝÄ£Ê½:SPIÉèÖÃÎªË«ÏßË«ÏòÈ«Ë«¹¤
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //ÉèÖÃSPI¹¤×÷Ä£Ê½:ÉèÖÃÎªÖ÷SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //ÉèÖÃSPIµÄÊý¾Ý´óÐ¡:SPI·¢ËÍ½ÓÊÕ8Î»Ö¡½á¹¹
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //´®ÐÐÍ¬²½Ê±ÖÓµÄ¿ÕÏÐ×´Ì¬Îª¸ßµçÆ½
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //´®ÐÐÍ¬²½Ê±ÖÓµÄµÚ¶þ¸öÌø±äÑØ£¨ÉÏÉý»òÏÂ½µ£©Êý¾Ý±»²ÉÑù
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSSÐÅºÅÓÉÓ²¼þ£¨NSS¹Ü½Å£©»¹ÊÇÈí¼þ£¨Ê¹ÓÃSSIÎ»£©¹ÜÀí:ÄÚ²¿NSSÐÅºÅÓÐSSIÎ»¿ØÖÆ
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //¶¨Òå²¨ÌØÂÊÔ¤·ÖÆµµÄÖµ:²¨ÌØÂÊÔ¤·ÖÆµÖµÎª256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //Ö¸¶¨Êý¾Ý´«Êä´ÓMSBÎ»»¹ÊÇLSBÎ»¿ªÊ¼:Êý¾Ý´«Êä´ÓMSBÎ»¿ªÊ¼
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRCÖµ¼ÆËãµÄ¶àÏîÊ½
SPI_Init(SPI1, &SPI_InitStructure);  //¸ù¾ÝSPI_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèSPIx¼Ä´æÆ÷

SPI_Cmd(SPI1, ENABLE); //Ê¹ÄÜSPIÍâÉè
}

void SPI1_SetSpeed(u8 SPI_BaudRatePrescaler)
{
  assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));
SPI1->CR1&=0XFFC7;
SPI1->CR1|=SPI_BaudRatePrescaler; //ÉèÖÃSPI2ËÙ¶È
SPI_Cmd(SPI1,ENABLE);

}

u8 SPI1_WriteByte(u8 byte)
{
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET){} // ÅÐ¶ÏSPI1 ·¢ËÍ»º³åÇøÊÇ·ñ¿Õ
  SPI_I2S_SendData(SPI1, byte);                   // ·¢ËÍ8Î»Êý¾Ý
  while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET){}    // ÅÐ¶ÏÊÇ·ñ½ÓÊÕ»º³åÇø·Ç¿Õ
  return SPI_I2S_ReceiveData(SPI1);
}

void TPL0501_Write_SR(u8 sr)
{
TPL0501=0;                         //Ê¹ÄÜÆ÷¼þ
SPI1_WriteByte(sr);                //Ð´ÈëÒ»¸ö×Ö½Ú
TPL0501=1;                         //È¡ÏûÆ¬Ñ¡
}

spi.h

#ifndef __SYS_H
#define __SYS_H
#include "stm32f10x.h"
//////////////////////////////////////////////////////////////////////////////////
//±¾³ÌÐòÖ»¹©Ñ§Ï°Ê¹ÓÃ£¬Î´¾ ×÷ÕßÐí¿É£¬²»µÃÓÃÓÚÆäËüÈÎºÎÓÃÍ¾
//ALIENTEK STM32¿ª·¢°å
//ÕýµãÔ ×Ó@ALIENTEK
//¼¼ÊõÂÛÌ³:www.openedv.com
//ÐÞ¸ÄÈÕÆÚ:2012/8/18
//°æ±¾£ºV1.7
//°æÈ¨ËùÓÐ£¬µÁ°æ±Ø¾¿¡£
//Copyright(C) ¹ãÖÝÊÐÐÇÒíµç×Ó¿Æ¼¼ÓÐÏÞ¹«Ë¾ 2009-2019
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////

//0,²»Ö§³Öucos
//1,Ö§³Öucos
#define SYSTEM_SUPPORT_OS 0 //¶¨ÒåÏµÍ³ÎÄ¼þ¼ÐÊÇ·ñÖ§³ÖUCOS


//Î»´ø²Ù×÷,ÊµÏÖ51ÀàËÆµÄGPIO¿ØÖÆ¹¦ÄÜ
//¾ßÌåÊµÏÖË¼Ïë,²Î¿¼<<CM3È¨ÍþÖ¸ÄÏ>>µÚÎåÕÂ(87Ò³~92Ò³).
//IO¿Ú²Ù×÷ºê¶¨Òå
#define BITBAND(addr, bitnum) ((addr & 0xF0000000)+0x2000000+((addr &0xFFFFF)<<5)+(bitnum<<2))
#define MEM_ADDR(addr)  *((volatile unsigned long  *)(addr))
#define BIT_ADDR(addr, bitnum) MEM_ADDR(BITBAND(addr, bitnum))
//IO¿ÚµØÖ·Ó³Éä
#define GPIOA_ODR_Addr (GPIOA_BASE+12) //0x4001080C
#define GPIOB_ODR_Addr (GPIOB_BASE+12) //0x40010C0C
#define GPIOC_ODR_Addr (GPIOC_BASE+12) //0x4001100C
#define GPIOD_ODR_Addr (GPIOD_BASE+12) //0x4001140C
#define GPIOE_ODR_Addr (GPIOE_BASE+12) //0x4001180C
#define GPIOF_ODR_Addr (GPIOF_BASE+12) //0x40011A0C
#define GPIOG_ODR_Addr (GPIOG_BASE+12) //0x40011E0C

#define GPIOA_IDR_Addr (GPIOA_BASE+8) //0x40010808
#define GPIOB_IDR_Addr (GPIOB_BASE+8) //0x40010C08
#define GPIOC_IDR_Addr (GPIOC_BASE+8) //0x40011008
#define GPIOD_IDR_Addr (GPIOD_BASE+8) //0x40011408
#define GPIOE_IDR_Addr (GPIOE_BASE+8) //0x40011808
#define GPIOF_IDR_Addr (GPIOF_BASE+8) //0x40011A08
#define GPIOG_IDR_Addr (GPIOG_BASE+8) //0x40011E08

//IO¿Ú²Ù×÷,Ö»¶Ôµ¥Ò»µÄIO¿Ú!
//È·±£nµÄÖµÐ¡ÓÚ16!
#define PAout(n) BIT_ADDR(GPIOA_ODR_Addr,n)  //Êä³ö
#define PAin(n) BIT_ADDR(GPIOA_IDR_Addr,n)  //ÊäÈë

#define PBout(n) BIT_ADDR(GPIOB_ODR_Addr,n)  //Êä³ö
#define PBin(n) BIT_ADDR(GPIOB_IDR_Addr,n)  //ÊäÈë

#define PCout(n) BIT_ADDR(GPIOC_ODR_Addr,n)  //Êä³ö
#define PCin(n) BIT_ADDR(GPIOC_IDR_Addr,n)  //ÊäÈë

#define PDout(n) BIT_ADDR(GPIOD_ODR_Addr,n)  //Êä³ö
#define PDin(n) BIT_ADDR(GPIOD_IDR_Addr,n)  //ÊäÈë

#define PEout(n) BIT_ADDR(GPIOE_ODR_Addr,n)  //Êä³ö
#define PEin(n) BIT_ADDR(GPIOE_IDR_Addr,n)  //ÊäÈë

#define PFout(n) BIT_ADDR(GPIOF_ODR_Addr,n)  //Êä³ö
#define PFin(n) BIT_ADDR(GPIOF_IDR_Addr,n)  //ÊäÈë

#define PGout(n) BIT_ADDR(GPIOG_ODR_Addr,n)  //Êä³ö
#define PGin(n) BIT_ADDR(GPIOG_IDR_Addr,n)  //ÊäÈë

//ÒÔÏÂÎª»ã±àº¯Êý
void WFI_SET(void); //Ö´ÐÐWFIÖ¸Áî
void INTX_DISABLE(void);//¹Ø±ÕËùÓÐÖÐ¶Ï
void INTX_ENABLE(void); //¿ªÆôËùÓÐÖÐ¶Ï
void MSR_MSP(u32 addr); //ÉèÖÃ¶ÑÕ»µØÖ·

#endif

main.c
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "usart.h"
#include "spi.h"
/************************************************
ALIENTEK¾«Ó¢STM32¿ª·¢°åÊµÑé23
SPI ÊµÑé
¼¼ÊõÖ§³Ö£ºwww.openedv.com
ÌÔ±¦µêÆÌ£ºhttp://eboard.taobao.com
¹Ø×¢Î¢ÐÅ¹«ÖÚÆ½Ì¨Î¢ÐÅºÅ£º"ÕýµãÔ ×Ó"£¬Ãâ·Ñ»ñÈ¡STM32×ÊÁÏ¡£
¹ãÖÝÊÐÐÇÒíµç×Ó¿Æ¼¼ÓÐÏÞ¹«Ë¾
×÷Õß£ºÕýµãÔ ×Ó @ALIENTEK
************************************************/


//ÒªÐ´Èëµ½W25Q64µÄ×Ö·û´®Êý×é
//const u8 TEXT_Buffer[]={"ELITE STM32 SPI TEST"};
//#define SIZE sizeof(TEXT_Buffer)
int main(void)
{
delay_init();            //ÑÓÊ±º¯Êý³õÊ¼»¯
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//ÉèÖÃÖÐ¶ÏÓÅÏÈ¼¶·Ö×éÎª×é2£º2Î»ÇÀÕ¼ÓÅÏÈ¼¶£¬2Î»ÏìÓ¦ÓÅÏÈ¼¶
uart_init(115200);      //´®¿Ú³õÊ¼»¯Îª115200
KEY_Init(); //°´¼ü³õÊ¼»¯
SPI1_Init(); //W25QXX³õÊ¼»¯
SPI1_SetSpeed(SPI_BaudRatePrescaler_2);


while(1)
{
TPL0501_Write_SR(128);
}

}

[/mw_shl_code]

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3条回答

xiedonghui258

2019-07-21 06:39

STM32 的SPI 是4线的，你这个只有3线。。所以，直接用模拟的方法吧，，

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