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Renesas R7FA8D1BH (Cortex®-M85) moderatur DS18B20

2024-07-12

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Tabula contentorum

Overview

I Software et hardware

1.1 Software ac hardware elit informationes

1.2 tabula Development notitia

1.3 Debugger notitia

2 FSP et Keil configuratione

2.1 Hardware interface circuit

2.2 FSB figurat IO DS18B20

2.3 Generate Keil project files

III DS18B20 coegi codice

3.1 Introductio ad DS18B20

3.2 DS18B20 exactoris implementation

3.2.1 IO status definition

3.2.2 Read IO status function

3.2.3 Alia munera

4 Test processuum

4.1 Application design

4.2 Testis

V accessiones

Renesas R7FA8D1BH (Cortex®-M85) moderatur DS18B20 et ADC ut munus jump consequi duarum paginarum

Overview

Articulus hic principaliter inducit applicationem comprehensivam causam designatam Renesas R7FA8D1BH (Cortex®-M85): applicans IO R7FA8D1BH ad efficiendum unum bus protocollum et munus ds18b20 impellendi perficiens propono in OLED in screen. Temperatura data etiam ad portum serialem per terminalem portum serialem mittitur.

I Software et hardware

1.1 Software ac hardware elit informationes

Software ac hardware notitiaVersionem Information
Renesas MCUR7FA8D1BH
KeilMDK ARM 5.38
FSP version5.3.0
Instrumentum debugging: N32G45XVL-STBDAP-LINK

1.2 tabula Development notitia

Auctor evolutionis incendii Yaoyang uti tabulae Renesas RA8. Praecipuum imperium MCU huius tabulae est R7FA8D1BHECBD, et nucleus 7FA8D1BHECBD est ARM Contex-M85.

1.3 Debugger notitia

Pro R7FA8D1BHECBD chip, nucleus adhibitus est Cortex®-M85 Core, ST-LINK-V2 vel J-LINK-V9 non sustinet unctiones et debugging functiones.Post multos conatus auctor invenitN32G45XVL-STBDAP-LINK qui cum tabula venit extrahere potest et debug R7FA8D1BHECBD.

Pictura infra pictura corporis N32G45XVL-STB tabula evolutionis est:

2 FSP et Keil configuratione

2.1 Hardware interface circuit

Circuitus interfaciei DS18B20 in Yaoyang Development Board_Renesas RA8 designatus est, qui interfaciem P809 adhibet ut DQ imperium signo DS18B20.

2.2 FSB figurat IO DS18B20

Configurare P809 ut communis IO interfaciei, ac deinde dynamice configurare statum output vel output IO in codice.

2.3 Generate Keil project files

Expleto modulo configurationis FSP, Project Generare potes. Aperi fasciculum documenti, cuius structura haec est:

Create in ds18b20.c lima coegi codice ad efficiendum

III DS18B20 coegi codice

3.1 Introductio ad DS18B20

Auctor sincere et exsecutionem logicam DS18B20 in speciali iam in articulo suo praecedente evolvit, unde eam hic non introducam.

DS18B20 Applicationem Note_Waveformia ds18b20 lectionis data-CSDN Blog

3.2 DS18B20 exactoris implementation

3.2.1 IO status definition

Linea 14 Codicis: Defini nos munus morae gradum

Linea 15 codicis: Define ms gradus mora functionis

Linea 18 codicis: Definire IO ACUS DS18B20

Linea 21 codicis: Input portum configuratione

Linea 22 codicis: Output portum configuratione

Line 24 of code: Set IO low level

Line 25 of code: Pone IO altam gradum

3.2.2 Read IO status function

Linea XLVII codicis: Lege statum IO in initus modus

3.2.3 Alia munera

Munus: ds18b20Init, deprehendere num DS18B20 est online?

Function: ds18b20BlockModeProcess. Legere valorem DS18B20

  1. /**
  2.   * @brief  reset DS18B20
  3.   * @note   if reset ds18b20 sucess, the return value is TRUE
  4.   * @param  None
  5.   * @retval True or Flalse
  6.   */
  7. static uint8_t ds18b20Init( void )
  8. {
  9.     uint16_t tempCnt = 0;
  10.     bsp_io_level_t status;
  11.    
  12.     // Set PIN mode output
  13.     DS_Mode_Out_PP();
  14.     
  15.     // Master pin is high 
  16.     DQ_SET_HIGH;
  17.     timeDelayUS(10);
  18.     
  19.     // Master pin is low 
  20.     DQ_SET_LOW;
  21.     // wait for 600 us 
  22.     timeDelayUS(750);
  23.     
  24.     // Set PIN mode input
  25.     DS_Mode_IN_PUT();
  26.     
  27.     while(1)
  28.     {
  29.         status = DQ_RAD_PIN();
  30.         if( status == 0)
  31.         {
  32.             tempCnt = 0;
  33.             return TRUE;
  34.         }
  35.         else
  36.         {
  37.           timeDelayUS(1);
  38.           tempCnt++;
  39.           if( tempCnt > 480 )
  40.               return FALSE;
  41.         }
  42.     }
  43. }
  44.  
  45.  
  46. static uint8_t readBit( void )
  47. {
  48.     uint8_t readCnt = 2;
  49.     uint8_t bitVal = 1;
  50.  
  51.     DQ_SET_LOW;
  52.     timeDelayUS(3);
  53.     DQ_SET_HIGH;
  54.     
  55.     timeDelayUS(5); // 15 us 
  56.     
  57.     while(readCnt-- )
  58.     {
  59.         //read DQ value 
  60.         if( DQ_RAD_PIN() == 0)
  61.         {
  62.            bitVal = 0;
  63.         }
  64.         timeDelayUS(2);  // 15 us 
  65.     }
  66.     
  67.     timeDelayUS(30);      // 15 us 
  68.  
  69.     return  bitVal;
  70. }
  71.  
  72. static uint8_t ds18b20ReadByte( void )
  73. {
  74.    uint8_t byteVal = 0;
  75.     
  76.    for ( uint8_t i = 0; i < 8; i++ )
  77.    {
  78.         byteVal >>= 1;
  79.        
  80.         uint8_t bitVal = readBit(); 
  81.         if( bitVal > 0)
  82.         {
  83.             byteVal |= 0x80;
  84.         }
  85.     }
  86.    
  87.     return  byteVal;
  88. }
  89.  
  90.  
  91. /**
  92.   * @brief  write one byte to DS18B20
  93.   * @note   
  94.   * @param  byte: the data that is sended to ds18b20
  95.   * @retval None
  96.   */
  97. void ds18b20WriteByte( uint8_t byte)
  98. {
  99.     unsigned char k;
  100.     
  101.     // Set PIN mode output
  102.     DS_Mode_Out_PP();
  103.     
  104.     for ( k = 0; k < 8; k++ )
  105.     {
  106.         if (byte & (1<<k))
  107.         {
  108.             DQ_SET_LOW;
  109.             timeDelayUS(2); 
  110.  
  111.             DQ_SET_HIGH;
  112.             timeDelayUS(65); 
  113.         }
  114.         else
  115.         {
  116.             DQ_SET_LOW;
  117.             timeDelayUS(65); 
  118.  
  119.             DQ_SET_HIGH;
  120.             timeDelayUS(2); 
  121.         }
  122.     }
  123. }
  124.  
  125. uint8_t ds18b20BlockModeProcess( void )
  126. {
  127.     uint16_t tempValue;
  128.     uint8_t tempL, tempH;
  129.  
  130.     if (ds18b20Init() == FALSE)
  131.     {
  132.         return FALSE;
  133.     }
  134.  
  135.     // wait for 600 us 
  136.     timeDelayUS(600);
  137.     
  138.     ds18b20WriteByte(0xcc);
  139.     ds18b20WriteByte(0x44);  // start convert temperature 
  140.  
  141.     if (ds18b20Init() == FALSE)
  142.     {
  143.         return FALSE;
  144.     }
  145.     // wait for 600 us 
  146.     timeDelayUS(600);
  147.  
  148.     ds18b20WriteByte(0xcc);
  149.     ds18b20WriteByte(0xbe);  // read temperature data register
  150.  
  151.     tempL = ds18b20ReadByte();
  152.     tempH = ds18b20ReadByte();
  153.     
  154.     if (tempH > 0x7f) 
  155.     {
  156.         tempL    = ~tempL;
  157.         tempH    = ~tempH+1; 
  158.         st_ds1b20val.sign = 1;
  159.     }
  160.  
  161.     tempValue = (uint16_t)((tempH << 8) | tempL);
  162.  
  163.     st_ds1b20val.temperatureVal = (float)(tempValue * 0.0625);
  164.     
  165.     return TRUE;
  166. }
  167.  
  168.  
  169. // NO blocking mode operate ds18b20 
  170. uint8_t ds18b20NoBlockingProcess( void )
  171. {
  172.     uint16_t tempValue;
  173.     static uint16_t waitCnt = 0;
  174.     uint8_t tempL, tempH;
  175.     static  uint8_t runState = 0;
  176.     
  177.     switch( runState )
  178.     {
  179.         default:
  180.         case INIT_DQ:
  181.             if (ds18b20Init() == FALSE)
  182.             {
  183.                 return FALSE;
  184.             }
  185.             runState = WAIT_READY;
  186.             break;
  187.             
  188.         case WAIT_READY:
  189.             timeDelayUS(2);       // IDEL 
  190.             runState = SKIDROM_CMD;
  191.             break;
  192.            
  193.        case SKIDROM_CMD:
  194.             ds18b20WriteByte(0xcc);
  195.             ds18b20WriteByte(0x44);  // begin to convert temperature data
  196.             waitCnt = 0;
  197.             runState = WAIT_CONVERT;
  198.             break;
  199.        
  200.        case WAIT_CONVERT:
  201.            waitCnt++;
  202.            if( waitCnt > WAIT_CNT_CONVERT)
  203.            {
  204.                waitCnt = 0;
  205.                runState = RESET_CMD;
  206.            }
  207.            break;
  208.         
  209.         case RESET_CMD:
  210.             if (ds18b20Init() == FALSE)
  211.             {
  212.                 return FALSE;
  213.             }
  214.             runState = WAIT_DATA_READY;
  215.             break;
  216.             
  217.         case WAIT_DATA_READY: 
  218.             timeDelayUS(2);     // IDEL 
  219.             runState = READ_CMD;
  220.             break;
  221.             
  222.         case READ_CMD:
  223.             ds18b20WriteByte(0xcc);
  224.             ds18b20WriteByte(0xbe);  // read temperature data register
  225.             runState = GET_VALUE;
  226.             break;
  227.             
  228.         case GET_VALUE:
  229.  
  230.             tempL = ds18b20ReadByte();
  231.             tempH = ds18b20ReadByte();
  232.  
  233.             if (tempH > 0x7f) 
  234.             {
  235.                 tempL    = ~tempL;
  236.                 tempH    = ~tempH+1; 
  237.                 st_ds1b20val.sign = 1;
  238.             }
  239.  
  240.             tempValue = (uint16_t)((tempH << 8) | tempL);
  241.  
  242.             st_ds1b20val.temperatureVal = (float)(tempValue * 0.0625);
  243.             runState = INIT_DQ;
  244.             return TRUE;
  245.     }
  246.     
  247.     return FALSE;
  248. }

4 Test processuum

4.1 Application design

Linea 113 codicis: Lege valorem ds18b20

Linea 130 codicis: Da exitum notitiae ds18b20 .

Linea CXXXI codicis: Formatted ostentationem data

Linea 132 codicis: Propono notitia in OLED

4.2 Testis

Codicem compone et codicem ad tabulam depone. Proventus currentium sunt haec:

V accessiones

DS18B20 coegi codice

I) crea in ds18b20.c lima et scribe sequenti codice

  1.  /*
  2.  FILE NAME  :  ds18b20.c
  3.  Description:  user ds18b20 interface 
  4.  Author     :  [email protected]
  5.  Date       :  2024/06/03
  6.  */
  7. #include "ds18b20.h" 
  8. #include "hal_data.h"
  9.  
  10. typedef enum{
  11.   INPUT = 0,
  12.   OUTPUT = 1,
  13. }IO_TYPE;
  14.  
  15. typedef enum{
  16.   FALSE = 0,
  17.   TRUE = 1,
  18. }RETURN_RESULT;
  19.  
  20. typedef enum{
  21.    INIT_DQ = 0,
  22.    WAIT_READY,
  23.    SKIDROM_CMD,
  24.     
  25.    WAIT_CONVERT,
  26.    RESET_CMD,
  27.    READ_CMD,
  28.  
  29.    WAIT_DATA_READY,
  30.    GET_VALUE,
  31.    IDLE_NULL
  32. }RUN_STATE;
  33.  
  34. ds18b20Struc st_ds1b20val;
  35.  
  36.  
  37. ds18b20Struc get_ds18b20_value( void )
  38. {
  39.     return st_ds1b20val;
  40. }
  41.  
  42. static bsp_io_level_t DQ_RAD_PIN(void)
  43. {
  44.     bsp_io_level_t state;
  45.  
  46.     // READ io
  47.     R_IOPORT_PinRead(&g_ioport_ctrl, DS_IO_PORT_PIN, &state);
  48.     
  49.     return state;
  50. }
  51.  
  52. /**
  53.   * @brief  reset DS18B20
  54.   * @note   if reset ds18b20 sucess, the return value is TRUE
  55.   * @param  None
  56.   * @retval True or Flalse
  57.   */
  58. static uint8_t ds18b20Init( void )
  59. {
  60.     uint16_t tempCnt = 0;
  61.     bsp_io_level_t status;
  62.    
  63.     // Set PIN mode output
  64.     DS_Mode_Out_PP();
  65.     
  66.     // Master pin is high 
  67.     DQ_SET_HIGH;
  68.     timeDelayUS(10);
  69.     
  70.     // Master pin is low 
  71.     DQ_SET_LOW;
  72.     // wait for 600 us 
  73.     timeDelayUS(750);
  74.     
  75.     // Set PIN mode input
  76.     DS_Mode_IN_PUT();
  77.     
  78.     while(1)
  79.     {
  80.         status = DQ_RAD_PIN();
  81.         if( status == 0)
  82.         {
  83.             tempCnt = 0;
  84.             return TRUE;
  85.         }
  86.         else
  87.         {
  88.           timeDelayUS(1);
  89.           tempCnt++;
  90.           if( tempCnt > 480 )
  91.               return FALSE;
  92.         }
  93.     }
  94. }
  95.  
  96.  
  97. static uint8_t readBit( void )
  98. {
  99.     uint8_t readCnt = 2;
  100.     uint8_t bitVal = 1;
  101.  
  102.     DQ_SET_LOW;
  103.     timeDelayUS(3);
  104.     DQ_SET_HIGH;
  105.     
  106.     timeDelayUS(5); // 15 us 
  107.     
  108.     while(readCnt-- )
  109.     {
  110.         //read DQ value 
  111.         if( DQ_RAD_PIN() == 0)
  112.         {
  113.            bitVal = 0;
  114.         }
  115.         timeDelayUS(2);  // 15 us 
  116.     }
  117.     
  118.     timeDelayUS(30);      // 15 us 
  119.  
  120.     return  bitVal;
  121. }
  122.  
  123. static uint8_t ds18b20ReadByte( void )
  124. {
  125.    uint8_t byteVal = 0;
  126.     
  127.    for ( uint8_t i = 0; i < 8; i++ )
  128.    {
  129.         byteVal >>= 1;
  130.        
  131.         uint8_t bitVal = readBit(); 
  132.         if( bitVal > 0)
  133.         {
  134.             byteVal |= 0x80;
  135.         }
  136.     }
  137.    
  138.     return  byteVal;
  139. }
  140.  
  141.  
  142. /**
  143.   * @brief  write one byte to DS18B20
  144.   * @note   
  145.   * @param  byte: the data that is sended to ds18b20
  146.   * @retval None
  147.   */
  148. void ds18b20WriteByte( uint8_t byte)
  149. {
  150.     unsigned char k;
  151.     
  152.     // Set PIN mode output
  153.     DS_Mode_Out_PP();
  154.     
  155.     for ( k = 0; k < 8; k++ )
  156.     {
  157.         if (byte & (1<<k))
  158.         {
  159.             DQ_SET_LOW;
  160.             timeDelayUS(2); 
  161.  
  162.             DQ_SET_HIGH;
  163.             timeDelayUS(65); 
  164.         }
  165.         else
  166.         {
  167.             DQ_SET_LOW;
  168.             timeDelayUS(65); 
  169.  
  170.             DQ_SET_HIGH;
  171.             timeDelayUS(2); 
  172.         }
  173.     }
  174. }
  175.  
  176. uint8_t ds18b20BlockModeProcess( void )
  177. {
  178.     uint16_t tempValue;
  179.     uint8_t tempL, tempH;
  180.  
  181.     if (ds18b20Init() == FALSE)
  182.     {
  183.         return FALSE;
  184.     }
  185.  
  186.     // wait for 600 us 
  187.     timeDelayUS(600);
  188.     
  189.     ds18b20WriteByte(0xcc);
  190.     ds18b20WriteByte(0x44);  // start convert temperature 
  191.  
  192.     if (ds18b20Init() == FALSE)
  193.     {
  194.         return FALSE;
  195.     }
  196.     // wait for 600 us 
  197.     timeDelayUS(600);
  198.  
  199.     ds18b20WriteByte(0xcc);
  200.     ds18b20WriteByte(0xbe);  // read temperature data register
  201.  
  202.     tempL = ds18b20ReadByte();
  203.     tempH = ds18b20ReadByte();
  204.     
  205.     if (tempH > 0x7f) 
  206.     {
  207.         tempL    = ~tempL;
  208.         tempH    = ~tempH+1; 
  209.         st_ds1b20val.sign = 1;
  210.     }
  211.  
  212.     tempValue = (uint16_t)((tempH << 8) | tempL);
  213.  
  214.     st_ds1b20val.temperatureVal = (float)(tempValue * 0.0625);
  215.     
  216.     return TRUE;
  217. }
  218.  
  219.  
  220. // NO blocking mode operate ds18b20 
  221. uint8_t ds18b20NoBlockingProcess( void )
  222. {
  223.     uint16_t tempValue;
  224.     static uint16_t waitCnt = 0;
  225.     uint8_t tempL, tempH;
  226.     static  uint8_t runState = 0;
  227.     
  228.     switch( runState )
  229.     {
  230.         default:
  231.         case INIT_DQ:
  232.             if (ds18b20Init() == FALSE)
  233.             {
  234.                 return FALSE;
  235.             }
  236.             runState = WAIT_READY;
  237.             break;
  238.             
  239.         case WAIT_READY:
  240.             timeDelayUS(2);       // IDEL 
  241.             runState = SKIDROM_CMD;
  242.             break;
  243.            
  244.        case SKIDROM_CMD:
  245.             ds18b20WriteByte(0xcc);
  246.             ds18b20WriteByte(0x44);  // begin to convert temperature data
  247.             waitCnt = 0;
  248.             runState = WAIT_CONVERT;
  249.             break;
  250.        
  251.        case WAIT_CONVERT:
  252.            waitCnt++;
  253.            if( waitCnt > WAIT_CNT_CONVERT)
  254.            {
  255.                waitCnt = 0;
  256.                runState = RESET_CMD;
  257.            }
  258.            break;
  259.         
  260.         case RESET_CMD:
  261.             if (ds18b20Init() == FALSE)
  262.             {
  263.                 return FALSE;
  264.             }
  265.             runState = WAIT_DATA_READY;
  266.             break;
  267.             
  268.         case WAIT_DATA_READY: 
  269.             timeDelayUS(2);     // IDEL 
  270.             runState = READ_CMD;
  271.             break;
  272.             
  273.         case READ_CMD:
  274.             ds18b20WriteByte(0xcc);
  275.             ds18b20WriteByte(0xbe);  // read temperature data register
  276.             runState = GET_VALUE;
  277.             break;
  278.             
  279.         case GET_VALUE:
  280.  
  281.             tempL = ds18b20ReadByte();
  282.             tempH = ds18b20ReadByte();
  283.  
  284.             if (tempH > 0x7f) 
  285.             {
  286.                 tempL    = ~tempL;
  287.                 tempH    = ~tempH+1; 
  288.                 st_ds1b20val.sign = 1;
  289.             }
  290.  
  291.             tempValue = (uint16_t)((tempH << 8) | tempL);
  292.  
  293.             st_ds1b20val.temperatureVal = (float)(tempValue * 0.0625);
  294.             runState = INIT_DQ;
  295.             return TRUE;
  296.     }
  297.     
  298.     return FALSE;
  299. }
  300.  
  301.  
  302.  
  303. /* End of this file */

II) crea in ds18b20.h lima et scribe in codice sequenti

  1. /*
  2.     FILE NAME  :  ds18b20.h
  3.     Description:  user ds18b20 interface 
  4.     Author     :  [email protected]
  5.     Date       :  2024/06/03
  6. */
  7. #ifndef DS18B20_H
  8. #define DS18B20_H
  9. #include "hal_data.h"
  10.  
  11.  
  12. #define WAIT_CNT_CONVERT     500 
  13.  
  14. #define timeDelayUS(us)      R_BSP_SoftwareDelay(us, BSP_DELAY_UNITS_MICROSECONDS);
  15. #define DS_DELAY_MS(ms)      R_BSP_SoftwareDelay(ms, BSP_DELAY_UNITS_MILLISECONDS);
  16.  
  17.  
  18. #define DS_IO_PORT_PIN       BSP_IO_PORT_08_PIN_09
  19.  
  20.  
  21. #define DS_Mode_IN_PUT()     R_IOPORT_PinCfg(&g_ioport_ctrl, DS_IO_PORT_PIN, IOPORT_CFG_PORT_DIRECTION_INPUT)
  22. #define DS_Mode_Out_PP()     R_IOPORT_PinCfg(&g_ioport_ctrl, DS_IO_PORT_PIN, IOPORT_CFG_PORT_DIRECTION_OUTPUT)
  23.  
  24. #define DQ_SET_LOW           R_IOPORT_PinWrite(&g_ioport_ctrl, DS_IO_PORT_PIN, BSP_IO_LEVEL_LOW)
  25. #define DQ_SET_HIGH          R_IOPORT_PinWrite(&g_ioport_ctrl, DS_IO_PORT_PIN, BSP_IO_LEVEL_HIGH)
  26.  
  27.  
  28. typedef struct{
  29.     float  temperatureVal; 
  30.     bool sign;
  31. }ds18b20Struc;
  32.  
  33. uint8_t ds18b20BlockModeProcess( void );
  34. ds18b20Struc get_ds18b20_value( void );
  35.  
  36.  
  37. #endif   /* DS18B20_H */
  38.  
  39.

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