我用STM32的SPI驱动TM7705接收到的数据全是0？

熊文涛 · 发表于 2015-3-31 11:12:04

我发我的全部代码，还有TM7705各个引脚的波形图。

熊文涛 · 发表于 2015-3-31 11:12:44

怎么上传程序包啊？

熊文涛 · 发表于 2015-3-31 11:16:08

我直接复制咯，代码如下：
//ÀûÓÃSTM32Ó²¼þSPI ÓëTM7705 ÊÕ·¢Êý¾Ý

//PA2:CS
//PA3:REST
//PA5:SCK
//PA6:MISO
//PA7:MOSI
//PA8

RDY


#include "stm32f10x.h"
#include "bsp_usart1.h"
#include "bsp_pwm_output.h"
#include "7705.h"
#include "SPI.h"

/**
  * @brief  Ö÷º¯Êý
  * @param  ÎÞ
  * @retval ÎÞ
  */
/*********ÏµÍ³ÖÐ¶Ï*********/
void NVIC_Configuration(void)
{
      /* Configure the NVIC Preemption Priority Bits */
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
}

int main(void)
{
   u16 b,i=1000;
float c;
/* USART1 config 115200 8-N-1 */
USART1_Config();
NVIC_Configuration();
TIM3_PWM_Init();
   SPIx_Init();
   TM7705_Init();
printf("\r\n this is a usart printf demo \r\n");
      while(1)
      {
            TM7705_Init();
            b = ReadTM7705();
            c = b*3.3/65535;
            printf("%f\n",c);
      for(; i != 0; i--);

printf("\r\n this is a usart printf demo \r\n");

      }

}
/*********************************************END OF FILE**********************/

熊文涛 · 发表于 2015-3-31 11:17:54

上面是Mian函数，接下来是 7705.C：
#include "7705.h"

void Delay(vu32 nCount)
{
      for(; nCount != 0; nCount--);
}
/********TM7705³õÊ¼»¯º¯Êý***********/
void TM7705_Init(void)
{
      unsigned char i ;

   GPIO_SetBits(GPIOA,GPIO_Pin_3);  //¸´Î»¹Ø
   for(i=0;i<5;i++)
{
      Delay(1000);                         //¸ßµçÆ½100
   }
GPIO_ResetBits(GPIOA,GPIO_Pin_3);//¸´Î»¿ª
   Delay(1000);                         //µÍµçÆ½20

   GPIO_SetBits(GPIOA,GPIO_Pin_3);//¸´Î»¹Ø
   for(i=0;i<5;i++)
{
      Delay(1000);                      //¸ßµçÆ½100
   }
      SPIx_ReadWriteByte(0x21) ;                      //Í¨µÀ1 ,ÏÂÒ»¸öÐ´Ê±ÖÓ¼Ä´æÆ÷
      Delay(1000);
      SPIx_ReadWriteByte(0x14) ;                      //Ð´Ê±ÖÓ¼Ä´æÆ÷ÉèÖÃ¸üÐÂËÙÂÊÎª200Hz
      Delay(1000);
      SPIx_ReadWriteByte(0x11) ;                      //Í¨µÀ1 ,ÏÂÒ»¸öÐ´ÉèÖÃ¼Ä´æÆ÷
      Delay(1000);
      SPIx_ReadWriteByte(0x44) ;                      //Ð´ÉèÖÃ¼Ä´æÆ÷ ,ÉèÖÃ³ÉË«¼«ÐÔ¡¢ÎÞ»º³å¡¢ÔöÒæÎª0¡¢ÂË²¨Æ÷¹¤×÷¡¢×ÔÐ£×¼
      Delay(1000000);
}

/********¶Á16Î»Êý¾Ý************/
u16 ReadTM7705_16BitValue(void)
{
      unsigned long DataL = 0;
      unsigned long DataH = 0;
      unsigned long Ret = 0;

      DataH = SPIx_ReadWriteByte(0xFF);
DataH = DataH << 8;
DataL = SPIx_ReadWriteByte(0xFF);
      Ret       = DataH | DataL;

      return(Ret) ;

}

u16 ReadTM7705(void)
{

  unsigned long Ret = 0;
GPIO_ResetBits(GPIOA,GPIO_Pin_2);//Æ¬Ñ¡¿ª
      SPIx_ReadWriteByte(0x39) ;    //ÉèÖÃ¶Áµ±Ç°Í¨µÀÊý¾Ý
      while(GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_8 == 1))
      {
            ;
      }
Ret = ReadTM7705_16BitValue();
GPIO_SetBits(GPIOA,GPIO_Pin_2);// Æ¬Ñ¡¹Ø

return Ret;



}

7705.h:
#ifndef __7705_H
#define __7705_H

#include "stm32f10x.h"
#include <stdio.h>

void TM7705_Init(void);
u8 SPIx_ReadWriteByte(u8 TxData);
void SPIx_Init(void);
u16 ReadTM7705(void);

#endif /* __7705_H */

熊文涛 · 发表于 2015-3-31 11:19:04

接下来是SPI.c:

#include "SPI.h"

/********¶ÁÈ¡AD7705µÚÒ»Í¨µÀÊý¾Ý************/

/****************************SPI³õÊ¼»¯*************************/
//SPI¿Ú³õÊ¼»¯
//ÕâÀïÕëÊÇ¶ÔSPI1µÄ³õÊ¼»¯
void SPIx_Init(void)
      {
      SPI_InitTypeDef  SPI_InitStructure;
      GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_SPI1|RCC_APB2Periph_AFIO, ENABLE );

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;// AdDrdy
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU ;//PC8ÉÏÀÊäÈë
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

      /* Configure SPI1 pins: SCK, MISO and MOSI */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //¸´ÓÃÍÆÍìÊä³ö
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);


      /* Configure I/O for Flash Chip select */
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3;  //SPI CS SPI REST
   GPIO_InitStructure.GPIO_Mode =GPIO_Mode_Out_PP;  //ÍÆÍìÊä³ö
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      /* Deselect the FLASH: Chip Select high */
      GPIO_SetBits(GPIOA,GPIO_Pin_2);
     GPIO_SetBits(GPIOA,GPIO_Pin_3);

      /* SPI1 configuration */
      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;             //Ñ¡ÔñÁË´®ÐÐÊ±ÖÓµÄÎÈÌ¬:Ê±ÖÓÐü¿Õ¸ß
      SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;       //Êý¾Ý²¶»ñÓÚµÚ¶þ¸öÊ±ÖÓÑØ
      SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;             //NSSÐÅºÅÓÉÓ²¼þ£¨NSS¹Ü½Å£©»¹ÊÇÈí¼þ£¨Ê¹ÓÃSSIÎ»£©¹ÜÀí:ÄÚ²¿NSSÐÅºÅÓÐSSIÎ»¿ØÖÆ
      SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;             //¶¨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÷

      //SPI1->CR1|=1<<6; //SPIÉè±¸Ê¹ÄÜ
      /* Enable SPI1  */
      SPI_Cmd(SPI1, ENABLE); //Ê¹ÄÜSPIÍâÉè

      SPIx_ReadWriteByte(0xff);//Æô¶¯´«Êä

}


//SPIx ¶ÁÐ´Ò»¸ö×Ö½Ú
//TxData:ÒªÐ´ÈëµÄ×Ö½Ú
//·µ»ØÖµ:¶ÁÈ¡µ½µÄ×Ö½Ú
u8 SPIx_ReadWriteByte(u8 TxData)
{
      GPIO_ResetBits(GPIOA,GPIO_Pin_2);//Æ¬Ñ¡¿ª
Delay(1000);
      while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); //¼ì²éÖ¸¶¨µÄSPI±êÖ¾Î»ÉèÖÃÓë·ñ:·¢ËÍ»º´æ¿Õ±êÖ¾Î»
      SPI_I2S_SendData(SPI1, TxData); //Í¨¹ýÍâÉèSPIx·¢ËÍÒ»¸öÊý¾Ý
      while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET); //¼ì²éÖ¸¶¨µÄSPI±êÖ¾Î»ÉèÖÃÓë·ñ:½ÓÊÜ»º´æ·Ç¿Õ±êÖ¾
      GPIO_SetBits(GPIOA,GPIO_Pin_2);// Æ¬Ñ¡¹Ø
      return SPI_I2S_ReceiveData(SPI1); //·µ»ØÍ¨¹ýSPIx×î½ü½ÓÊÕµÄÊý¾Ý
}
接下来是SPI.h:
#ifndef __SPI_H
#define __SPI_H

#include "stm32f10x.h"
#include <stdio.h>

u8 SPIx_ReadWriteByte(u8 TxData);
void SPIx_Init(void);
void Delay(vu32 nCount);

#endif /* __SPI_H */

熊文涛 · 发表于 2015-3-31 11:20:00

接下来是串口：
#include "bsp_usart1.h"

/**
  * @brief  USART1 GPIO ÅäÖÃ,¹¤×÷Ä£Ê½ÅäÖÃ¡£115200 8-N-1
  * @param  ÎÞ
  * @retval ÎÞ
  */
void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

/* config USART1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

/* USART1 GPIO config */
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/* USART1 mode config */
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}

///ÖØ¶¨Ïòc¿âº¯Êýprintfµ½USART1
int fputc(int ch, FILE *f)
{
/* ·¢ËÍÒ»¸ö×Ö½ÚÊý¾Ýµ½USART1 */
USART_SendData(USART1, (uint8_t) ch);

/* µÈ´ý·¢ËÍÍê±Ï */
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);

return (ch);
}

///ÖØ¶¨Ïòc¿âº¯Êýscanfµ½USART1
int fgetc(FILE *f)
{
/* µÈ´ý´®¿Ú1ÊäÈëÊý¾Ý */
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);

return (int)USART_ReceiveData(USART1);
}
/********??????,???????***********/

void RCC_Configuration(void)

{

      SystemInit();

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA

            |RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO

            |RCC_APB2Periph_SPI1, ENABLE );

}

/*********************************************END OF FILE**********************/

#ifndef __USART1_H
#define __USART1_H

#include "stm32f10x.h"
#include <stdio.h>

void USART1_Config(void);
void RCC_Configuration(void)  ;
//int fputc(int ch, FILE *f);
//void USART1_printf(USART_TypeDef* USARTx, uint8_t *Data,...);

#endif /* __USART1_H */

熊文涛 · 发表于 2015-3-31 11:20:43

接下来是输出的1M时钟给7705：

#include "bsp_pwm_output.h"

/**
* @brief ÅäÖÃTIM3¸´ÓÃÊä³&ouml

WMÊ±ÓÃµ½µÄI/O
  * @param  ÎÞ
  * @retval ÎÞ
  */
static void TIM3_GPIO_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

/* ÉèÖÃTIM3CLK Îª 72MHZ */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;       // ¸´ÓÃÍÆÍìÊä³ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  /*GPIOB Configuration: TIM3 channel 3 and 4 as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}

/**
  * @brief  ÅäÖÃTIM3Êä³öµ&Auml

WMÐÅºÅµÄÄ£Ê½£¬ÈçÖÜÆÚ¡¢¼«ÐÔ¡¢Õ¼¿Õ±È
  * @param  ÎÞ
  * @retval ÎÞ
  */
/*
* TIMxCLK/CK_PSC --> TIMxCNT --> TIMx_ARR --> TIMxCNT ÖØÐÂ¼ÆÊý
*                   TIMx_CCR(µçÆ½·¢Éú±ä»¯)
* ÐÅºÅÖÜÆÚ=(TIMx_ARR +1 ) * Ê±ÖÓÖÜÆÚ
* Õ¼¿Õ±È=TIMx_CCR/(TIMx_ARR +1)
*/
static void TIM3_Mode_Config(void)
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

/* PWMÐÅºÅµçÆ½Ìø±äÖµ */

u16 CCR4_Val = 36;

/* -----------------------------------------------------------------------
TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR+1)* 100% = 50%
TIM3 Channel2 duty cycle = (TIM3_CCR2/ TIM3_ARR+1)* 100% = 37.5%
TIM3 Channel3 duty cycle = (TIM3_CCR3/ TIM3_ARR+1)* 100% = 25%
TIM3 Channel4 duty cycle = (TIM3_CCR4/ TIM3_ARR+1)* 100% = 12.5%
  ----------------------------------------------------------------------- */

  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 71;    //µ±¶¨Ê±Æ÷´Ó0¼ÆÊýµ½999£¬¼´Îª1000´Î£¬ÎªÒ»¸ö¶¨Ê±ÖÜÆÚ
  TIM_TimeBaseStructure.TIM_Prescaler = 0;       //ÉèÖÃÔ¤·ÖÆµ£º²»Ô¤·ÖÆµ£¬¼´Îª72MHz
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ; //ÉèÖÃÊ±ÖÓ·ÖÆµÏµÊý£º²»·ÖÆµ(ÕâÀïÓÃ²»µ½)
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //ÏòÉÏ¼ÆÊýÄ£Ê½
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  /* PWM1 Mode configuration: Channel1 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;       //ÅäÖÃÎ&ordf

WMÄ£Ê½1
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //µ±¶¨Ê±Æ÷¼ÆÊýÖµÐ¡ÓÚCCR1_ValÊ±Îª¸ßµçÆ½

  /* PWM1 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR4_Val; //ÉèÖÃÍ¨µÀ4µÄµçÆ½Ìø±äÖµ£¬Êä³öÁíÍâÒ»¸öÕ¼¿Õ±Èµ&Auml

WM
  TIM_OC4Init(TIM3, &TIM_OCInitStructure); //Ê¹ÄÜÍ¨µÀ4
  TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM3, ENABLE);    // Ê¹ÄÜTIM3ÖØÔØ¼Ä´æÆ÷ARR

  /* TIM3 enable counter */
  TIM_Cmd(TIM3, ENABLE);                //Ê¹ÄÜ¶¨Ê±Æ÷3
}

/**
  * @brief  TIM3 Êä³&ouml

WMÐÅºÅ³õÊ¼»¯£¬Ö»Òªµ÷ÓÃÕâ¸öº¯Êý
* TIM3µÄËÄ¸öÍ¨µÀ¾Í»áÓ&ETH

WMÐÅºÅÊä³ö
  * @param  ÎÞ
  * @retval ÎÞ
  */
void TIM3_PWM_Init(void)
{
TIM3_GPIO_Config();
TIM3_Mode_Config();
}

/*********************************************END OF FILE**********************/

#ifndef __PWM_OUTPUT_H
#define __PWM_OUTPUT_H

#include "stm32f10x.h"

void TIM3_PWM_Init(void);

#endif /* __PWM_OUTPUT_H */

fire · 发表于 2015-3-31 11:21:33

楼主，遇到这种情况一般都只能是自己帮自己，TM7705我们也没用过

具体的问题还得靠自己

单步一步步调试吧

熊文涛 · 发表于 2015-3-31 11:25:37

本帖最后由熊文涛于 2015-3-31 11:26 编辑

我测了SCLK IN的波形确实稳定的1M，然后数据波形SCK也是很稳定的，然后我想看看数据传输时 SCK与CS的波形是不是和芯片资料上的一样，结果，SCK的波形确实是，起伏也是3V左右，但是CS几乎没啥变化一样，有点干扰，看不出是高电平还是低电平，问题可能是出在时序上，可我怎么想都想不明白，代码改了又改，哎不知道错在哪，我的通道1接的是电阻0，通道2接了大概100欧姆，两个通道轮流测全是0.

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我用STM32的SPI驱动TM7705接收到的数据全是0？

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