Kuongororwa kweRadio Schematic Diagram Kubva paRDA5807M

Iyi circuit Schematic Diagram imodule yekugamuchira radio yeFM yakavakirwa paRDA5807M secore IC. Inonyanya kushandisa FM signal reception, audio output, uye basic control functions . Ongororo iri pazasi yakakamurwa kuita core components, functional modules, uye key design parameters.

1. Chikamu Chepakati uye Mabasa ePin

Core IC: RDA5807M

RDA5807M iradio receiver yeFM yakabatana zvikuru inotsigira FM broadcast reception uye I2C / SDIO serial control . Zvichienderana nechirongwa, ma key pins neconnections dzawo zvakapfupikiswa pazasi:

2. Kupatsanurwa kweMamodule Anoshanda

2.1 Power Supply Module

• Input Voltage: 3.3V DC (yakarongedzwa)
• Sefa Zvikamu:
  • C8 (0.1µF), C9 (0.1µF): Ma capacitor anoparadzanisa ma frequency akawanda pakati peVDD neGND, achideredza ruzha rwesimba
  • C10 (22µF): Capacitor yemagetsi yakawanda yekusefa-frequency yakaderera uye yekuchengetedza simba
  • C26 (0.1µF): Kuwedzera kupatsanurwa kwemagetsi kuti kuwedzere kugadzikana kwemagetsi

Kusefa uku kwezvikamu zvakawanda kunovimbisa kuti simba remagetsi rinotumirwa kuFM receiver IC rakasimba uye risina ruzha rwakanyanya .

2.2 FM Signal Reception Module

• Signal Inzwa Zvinotaurwa:
  • The Pini yeFMIN (Pin 5) inobatanidza kune antenna yekunze yeFM (chinhu che antenna hachiratidzirwe muchirongwa)
  • Inogamuchira masaini eredhiyo yeFM mu 87-108 MHz Band
• Dunhu reCrystal Oscillator:
  • A 32.768 kHz kristaro (X1) inopa wachi chaiyo yekutarisa
  • Inovimbisa kugadziriswa kweFM nemazvo uye inodzivirira kutenderera kwema frequency panguva yekusarudza chiteshi

2.3 Module yeKudzora neKutaurirana

• Mutauro wekukurukurirana:
  • SDIO (Data reSerial) + SCLK (Wachi yeSerial)
  • kunoenderana I2C kana mamwe mapuroteni ekutaurirana akafanana
  • Inoshandiswa kubatanidza neMCU yekunze (semuenzaniso, microcontroller)
• Zvinodzivirira Kudhonza:
  • R6 (10kΩ) yeSDIO
  • R7 (10kΩ) yeSCLK
  • Ose akabatana ne 3V3, kuve nechokwadi chekuti mazinga ekufunga akasimba uye kutaurirana kwakavimbika

2.4 Module Inobuda Munzwi

• Audio Outputs:
  • NZIRA: Odhiyo yeanalog yechiteshi chekurudyi
  • ZVINHU ZVAKANYANYA: Odhiyo yeanalog yekuruboshwe
• Zvinobuda izvi zvinogona kuva:
  • Yakabatana zvakananga ku pamahedhifoni
  • Yakabatanidzwa ne vakurukuri (cherechedza: chinhu chekunze amplifier yeaudio inodiwa kuti simba ribude rakawanda)

2.5 Module Yekubatsira Yekusefa uye Kufananidza

• Inductors:
  • L1, L2 (100 nH): Zvingangoshandiswa pakuenzanisa RF impedance kana kusefa kwekuisa paFM front end
  • Inobatsira kuderedza kuratidzwa kwechiratidzo uye kuvandudza kunzwisiswa kwekugamuchira
• Capacitors:
  • C13 (100 pF), C14 (24 pF): Shanda nevainductors kuti ugadzire LC firita network
  • Dzivisa kupindira kwe high-frequency uye chenesa FM signal
• Grounding:
  • Kubatana kwakawanda kweGND kunoratidza a dhizaini yepasi rose yenzvimbo yakabatana
  • Inoderedza ruzha uye inovandudza kugadzikana kwese kwese kwedunhu

3. Zvikamu Zvikuru uye Zvimiro zveDhizaini

• Operating Voltage: 3.3V
  • Inoshanda zvizere neMCUs huru pasina kuchinja nhanho
• Kuwanda kweKristaro: 32.768 kHz
  • Maitikiro enguva yakatarwa muindasitiri kuti nguva igare yakagadzikana
• Kudzora Maitiro: SDIO + SCLK serial interface
  • Kurongeka kuri nyore, mitsetse miviri chete ndiyo inodiwa
• Dhizaini Yekusefa:
  • Ma capacitor ekubvisa simba akawanda (0.1µF + 22µF)
  • Kusefa kweLC kumberi kweRF kuti pave nekudzivirira ruzha rwakasimba
• Mutero weMutauro:
  • Odhiyo yeanalog ine nzira mbiri (ROUT / LOUT)
  • Inotsigira kutamba kwe stereo FM

4. Maitiro Ekushandisa uye Mazano Ekuwedzera

Maitiro echimiro

• Maredhiyo eFM anotakurika
• Maspika akangwara ane mashandiro eredhiyo yeFM
• Masisitimu ekugamuchira FM anodzorwa neMCU

Kuwedzera Kwekushandisa

• Shandisa iyo antenna yekunze yetelescopic kana antenna yePCB kuvandudza kunzwisiswa kwekugamuchira
• Wedzera an amplifier yesimba reodhiyo (semuenzaniso, LM386) kuenda kuROUT/LOUT yekufambisa masipika makuru
• Gonesa maficha epamusoro kuburikidza neMCU control:
  • Kuskena otomatiki kwechiteshi
  • Gadzirisa nzvimbo yekuchengetera chiteshi
  • Kudzora vhoriyamu yedhijitari

5. Zvinyorwa zveDhizaini uye Zvekuchengetedza

• Simba Kugadzikana:
  • Iva nechokwadi chekuti 3.3V haipindi ruzha rwakawanda kuti usanyanya kugadzikana kana ruzha rusina kugadzikana
• Grounding:
  • Shandisa gwara rekutsigira rakasimba uye rinoenderana
  • Dzivisa musiyano ungavapo pakati penzvimbo yemagetsi nenzvimbo yekurira kuti udzivise ruzha
• Impedans Matching:
  • Antena yakabatana ne FMIN inofanira kunge yakafanana ne impedance (kazhinji 50Ω) kuti vagamuchire zvakanaka
• Chikamu Sarudzo:
  • Shandisa a kristaro yakanyatsorurama ye32.768 kHz
  • Unofarira Ma capacitor eNP0 / C0G yeRF uye zvikamu zvine chekuita nenguva nekuda kwekugadzikana kwakanyanya

Kodhi yepurogiramu yedunhu reredhiyo

RDA5807.H
/*
**==============================================================================
** RDA5807.H:         
**
**  Description:
**
**==============================================================================
*/
#ifndef __RDA5807__
#define __RDA5807__
//------------------------------------------------------------------------------

#ifdef RDA5807_GLOBALS
   #define RDA5807_EXT
#else
   #define RDA5807_EXT extern
#endif // RDA5807_GLOBALS
//------------------------------------------------------------------------------
//==============================================================================

void RDA5807Init(void);

//------------------------------------------------------------------------------

RDA5807_EXT uint16_t g_nRDA5807Channel;

//------------------------------------------------------------------------------
void RDA5807Setup(void);
void RDA5807I2CWrite(uint8_t * pucData, int nLength);
void RDA5807SetChannel(float freq);



//==============================================================================
//             END OF THE FILE : RDA5807.H
//------------------------------------------------------------------------------
#endif // __RDA5807__

/*
**==============================================================================
** RDA5807.C:            
**
**==============================================================================
*/

//------------------------------------------------------------------------------
#include "stm32f0xx_hal.h"
#include "stm32f0xxa.h"

#define RDA5807_GLOBALS        1              // Define the global variables
#include "RDA5807.H"

//------------------------------------------------------------------------------
#define RDA5807_BOOT_LENGTH     12
uint8_t RDA5807_boot_config[] = {
    0xc1, 0x03,                             // Register 0x2
    0x00, 0x00,                             // Register 0x3
    0x0a, 0x00,                             // Register 0x4
    0x88, 0x0f,                             // Register 0x5
    0x00, 0x00,                             // Register 0x6
    0x42, 0x02,                             // Register 0x7
};


//------------------------------------------------------------------------------
#define RDA5807_TUNE_CONFIG_LENGTH  4

uint8_t RDA5807_tune_config[] = {
    0xc0, 0x01,                             // Register 2
    0x00, 0x00,                             // Reigster 3
};

void RDA5807SetTuneConfig(uint16_t channel) {
    RDA5807_tune_config[2] = (uint8_t)(channel >> 2);
    RDA5807_tune_config[3] = (uint8_t)(((channel & 0x3) << 6) | 0x10);
}

//------------------------------------------------------------------------------

void RDA5807Init(void) {

/* Assumin band starts at 87.0MHz(per setting below)
 * and channel spaceing of 100kHz(0.1Mhz)(per settings below)
 * then channel can be derive as floowins:
 * channel = (<desired freq in MHz> - 87.0) / 0.1
 *
 * which is ave as:
 * <10x desired ferq in MHz> - 870
*/
    g_nRDA5807Channel = 6;
    RDA5807Setup();
}

//------------------------------------------------------------------------------
extern I2C_HandleTypeDef hi2c1;
void RDA5807I2CWrite(uint8_t * pucData, int nLength) {
    HAL_I2C_Master_Transmit(&hi2c1, 0x20, pucData, nLength, 10);
}

//------------------------------------------------------------------------------
void RDA5807Setup(void) {
    RDA5807I2CWrite(RDA5807_boot_config, RDA5807_BOOT_LENGTH);
    RDA5807SetTuneConfig(g_nRDA5807Channel);
    RDA5807I2CWrite(RDA5807_tune_config, RDA5807_TUNE_CONFIG_LENGTH);
}


void RDA5807SetChannel(float freq) {
    g_nRDA5807Channel = (int)((freq - 87.0) * 10.0 + 0.5);
    RDA5807SetTuneConfig(g_nRDA5807Channel);
    RDA5807I2CWrite(RDA5807_tune_config, RDA5807_TUNE_CONFIG_LENGTH);
}

//==============================================================================
//                END OF THE FILE : RDA5807.C
//------------------------------------------------------------------------------