ESP8266 上的多个从属 SPI - PN532 和 ILI9341
Multiple Slave SPI on ESP8266 - PN532 and ILI9341
我正在尝试在同一 SPI 总线上将 ESP12-E 模块与 ILI9341 显示器 320*240 和 PN532 RFID reader 连接起来。我在不同的 GPIO 上分配了 SS 引脚。
我无法与两者通信。显示器在任何条件下都能完美工作。但是一旦我与 ILI9341 通信，PN532 停止工作，即使我重新初始化它也不会响应，直到我重新启动设备。
任何帮助将不胜感激
我的代码：
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_PN532.h>
#include <UTFT.h>
UTFT lcd(ILI9341_S5P,15,D1,D3);
// If using the breakout with SPI, define the pins for SPI communication.
#define PN532_SS (D4)
#define PN532_SCK (D5)
#define PN532_MOSI (D7)
#define PN532_MISO (D6)
// If using the breakout or shield with I2C, define just the pins connected
// to the IRQ and reset lines. Use the values below (2, 3) for the shield!
#define PN532_IRQ (2)
#define PN532_RESET (3) // Not connected by default on the NFC Shield
// Uncomment just _one_ line below depending on how your breakout or shield
// is connected to the Arduino:
// Use this line for a breakout with a SPI connection:
Adafruit_PN532 nfc(PN532_SCK, PN532_MISO, PN532_MOSI, PN532_SS);
// Use this line for a breakout with a hardware SPI connection. Note that
// the PN532 SCK, MOSI, and MISO pins need to be connected to the Arduino's
// hardware SPI SCK, MOSI, and MISO pins. On an Arduino Uno these are
// SCK = 13, MOSI = 11, MISO = 12. The SS line can be any digital IO pin.
//Adafruit_PN532 nfc(PN532_SS);
// Or use this line for a breakout or shield with an I2C connection:
//Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET);
extern uint8_t BigFont[];
void setup(void) {
Serial.begin(115200);
Serial.println("Hello!");
nfc.begin();
uint32_t versiondata = nfc.getFirmwareVersion();
if (! versiondata) {
Serial.print("Didn't find PN53x board");
while (1); // halt
}
// Got ok data, print it out!
Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
lcd.InitLCD();
lcd.setColor ( 0, 0, 0 );
lcd.fillRect(1,1,319,239);
lcd.setColor ( 255, 255, 255 );
lcd.fillRect(100,100,220,140);
lcd.setFont ( BigFont );
lcd.print(String("Scanning"),0,0);
// Set the max number of retry attempts to read from a card
// This prevents us from waiting forever for a card, which is
// the default behaviour of the PN532.
nfc.setPassiveActivationRetries(0xFF);
// configure board to read RFID tags
nfc.SAMConfig();
Serial.println("Waiting for an ISO14443A card");
}
void loop(void) {
boolean success;
uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
// Wait for an ISO14443A type cards (Mifare, etc.). When one is found
// 'uid' will be populated with the UID, and uidLength will indicate
// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength,25);
if (success) {
Serial.println("Found a card!");
Serial.print("UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
Serial.print("UID Value: ");
for (uint8_t i=0; i < uidLength; i++)
{
Serial.print(" 0x");Serial.print(uid[i], HEX);
}
Serial.println("");
// Wait 1 second before continuing
delay(1000);
}
else
{
// PN532 probably timed out waiting for a card
//Serial.println("Timed out waiting for a card");
}
}
我进行了大量测试并发现 - SPI 位顺序不同，因此您不能在同一个 SPI 上驱动这两个设备。
但是你可以对NFC模块使用SW-SPI (bitbanging)，因为不需要快速驱动它。相反，TFT 必须很快才能具有良好的更新率。
我的设置中仍有一个问题未解决：
显示器没有显示内容，如果你有一个打开的串行终端。但是当它关闭时，TFT 和 NFC 都可以很好地协同工作。
这是我的代码：
#include <ESP8266WiFi.h>
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_PN532.h>
#include <UTFT.h>
// NFC module
#define PN532_SCK D1
#define PN532_MOSI D2
#define PN532_MISO D3
#define PN532_SS D0
Adafruit_PN532 nfc(PN532_SCK, PN532_MISO, PN532_MOSI, PN532_SS);
// TFT display
// HSPI defines
#define TFT_SCK D5
#define TFT_MOSI D7
//#define TFT_MISO D6 (not connected)
#define TFT_CS D8
#define TFT_DC D4
UTFT myGLCD(ILI9341_S5P, TFT_CS, -1, TFT_DC);
// Declare which fonts we will be using
extern uint8_t SmallFont[];
extern uint8_t BigFont[];
// forward declaration of helper function to get UID as HEX-String
void byteToHexString(String &dataString, byte *uidBuffer, byte bufferSize, String strSeperator);
void setup() {
Serial.begin(9600);
Serial.println("Initial nfc module");
nfc.begin();
uint32_t versiondata = nfc.getFirmwareVersion();
if (! versiondata) {
Serial.print("Didn't find PN53x board");
while (1); // halt
}
// Got ok data, print it out!
Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
// Set the max number of retry attempts to read from a card
// This prevents us from waiting forever for a card, which is
// the default behaviour of the PN532.
nfc.setPassiveActivationRetries(0xFF);
// configure board to read RFID tags
nfc.SAMConfig();
Serial.println("Waiting for an ISO14443A card");
Serial.println("Initial tft display");
myGLCD.InitLCD();
myGLCD.setColor(0, 0, 0);
myGLCD.fillRect(1,1,319,239);
myGLCD.setColor(255, 255, 255);
myGLCD.setFont(BigFont);
myGLCD.print(String("Scanning"),0,0);
}
void loop(void) {
boolean success;
uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
// Wait for an ISO14443A type cards (Mifare, etc.). When one is found
// 'uid' will be populated with the UID, and uidLength will indicate
// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
//success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength,25);
if (success) {
Serial.println("Found a card!");
Serial.print("UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
Serial.print("UID Value: ");
String strUID;
// store UID as HEX-String to strUID and print it to display
byteToHexString(strUID, uid, uidLength, "-");
Serial.println("");
Serial.println(strUID);
myGLCD.print(strUID, CENTER, 50);
myGLCD.setColor ( 255, 0, 0 );
myGLCD.setFont ( BigFont );
myGLCD.print(String("Scanning"),0,0);
// Wait 1 second before continuing
delay(1000);
}
else
{
Serial.println("Timed out or waiting for a card");
}
}
// helper function to get UID as HEX-String
void byteToHexString(String &dataString, byte *uidBuffer, byte bufferSize, String strSeperator=":") {
dataString = "";
for (byte i = 0; i < bufferSize; i++) {
if (i>0) {
dataString += strSeperator;
if (uidBuffer[i] < 0x10)
dataString += String("0");
}
dataString += String(uidBuffer[i], HEX);
}
dataString.toUpperCase();
}
感谢您的帮助。
我不是 bitbanging SPI 的忠实粉丝。
我尝试了几种方法并尝试重新初始化等。
终于解决了
不知道为什么，当我读卡后重新初始化spi硬件时，两个模块都可以正常工作。
我读卡后刚加的代码：
lcd._hw_special_init();
赞：
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength,0);
if (success) {
lcd._hw_special_init();
//Do the rest
}
我正在尝试在同一 SPI 总线上将 ESP12-E 模块与 ILI9341 显示器 320*240 和 PN532 RFID reader 连接起来。我在不同的 GPIO 上分配了 SS 引脚。
我无法与两者通信。显示器在任何条件下都能完美工作。但是一旦我与 ILI9341 通信，PN532 停止工作，即使我重新初始化它也不会响应，直到我重新启动设备。
任何帮助将不胜感激 我的代码：
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_PN532.h>
#include <UTFT.h>
UTFT lcd(ILI9341_S5P,15,D1,D3);
// If using the breakout with SPI, define the pins for SPI communication.
#define PN532_SS (D4)
#define PN532_SCK (D5)
#define PN532_MOSI (D7)
#define PN532_MISO (D6)
// If using the breakout or shield with I2C, define just the pins connected
// to the IRQ and reset lines. Use the values below (2, 3) for the shield!
#define PN532_IRQ (2)
#define PN532_RESET (3) // Not connected by default on the NFC Shield
// Uncomment just _one_ line below depending on how your breakout or shield
// is connected to the Arduino:
// Use this line for a breakout with a SPI connection:
Adafruit_PN532 nfc(PN532_SCK, PN532_MISO, PN532_MOSI, PN532_SS);
// Use this line for a breakout with a hardware SPI connection. Note that
// the PN532 SCK, MOSI, and MISO pins need to be connected to the Arduino's
// hardware SPI SCK, MOSI, and MISO pins. On an Arduino Uno these are
// SCK = 13, MOSI = 11, MISO = 12. The SS line can be any digital IO pin.
//Adafruit_PN532 nfc(PN532_SS);
// Or use this line for a breakout or shield with an I2C connection:
//Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET);
extern uint8_t BigFont[];
void setup(void) {
Serial.begin(115200);
Serial.println("Hello!");
nfc.begin();
uint32_t versiondata = nfc.getFirmwareVersion();
if (! versiondata) {
Serial.print("Didn't find PN53x board");
while (1); // halt
}
// Got ok data, print it out!
Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
lcd.InitLCD();
lcd.setColor ( 0, 0, 0 );
lcd.fillRect(1,1,319,239);
lcd.setColor ( 255, 255, 255 );
lcd.fillRect(100,100,220,140);
lcd.setFont ( BigFont );
lcd.print(String("Scanning"),0,0);
// Set the max number of retry attempts to read from a card
// This prevents us from waiting forever for a card, which is
// the default behaviour of the PN532.
nfc.setPassiveActivationRetries(0xFF);
// configure board to read RFID tags
nfc.SAMConfig();
Serial.println("Waiting for an ISO14443A card");
}
void loop(void) {
boolean success;
uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
// Wait for an ISO14443A type cards (Mifare, etc.). When one is found
// 'uid' will be populated with the UID, and uidLength will indicate
// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength,25);
if (success) {
Serial.println("Found a card!");
Serial.print("UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
Serial.print("UID Value: ");
for (uint8_t i=0; i < uidLength; i++)
{
Serial.print(" 0x");Serial.print(uid[i], HEX);
}
Serial.println("");
// Wait 1 second before continuing
delay(1000);
}
else
{
// PN532 probably timed out waiting for a card
//Serial.println("Timed out waiting for a card");
}
}
我进行了大量测试并发现 - SPI 位顺序不同，因此您不能在同一个 SPI 上驱动这两个设备。
但是你可以对NFC模块使用SW-SPI (bitbanging)，因为不需要快速驱动它。相反，TFT 必须很快才能具有良好的更新率。
我的设置中仍有一个问题未解决： 显示器没有显示内容，如果你有一个打开的串行终端。但是当它关闭时，TFT 和 NFC 都可以很好地协同工作。
这是我的代码：
#include <ESP8266WiFi.h>
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_PN532.h>
#include <UTFT.h>
// NFC module
#define PN532_SCK D1
#define PN532_MOSI D2
#define PN532_MISO D3
#define PN532_SS D0
Adafruit_PN532 nfc(PN532_SCK, PN532_MISO, PN532_MOSI, PN532_SS);
// TFT display
// HSPI defines
#define TFT_SCK D5
#define TFT_MOSI D7
//#define TFT_MISO D6 (not connected)
#define TFT_CS D8
#define TFT_DC D4
UTFT myGLCD(ILI9341_S5P, TFT_CS, -1, TFT_DC);
// Declare which fonts we will be using
extern uint8_t SmallFont[];
extern uint8_t BigFont[];
// forward declaration of helper function to get UID as HEX-String
void byteToHexString(String &dataString, byte *uidBuffer, byte bufferSize, String strSeperator);
void setup() {
Serial.begin(9600);
Serial.println("Initial nfc module");
nfc.begin();
uint32_t versiondata = nfc.getFirmwareVersion();
if (! versiondata) {
Serial.print("Didn't find PN53x board");
while (1); // halt
}
// Got ok data, print it out!
Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
// Set the max number of retry attempts to read from a card
// This prevents us from waiting forever for a card, which is
// the default behaviour of the PN532.
nfc.setPassiveActivationRetries(0xFF);
// configure board to read RFID tags
nfc.SAMConfig();
Serial.println("Waiting for an ISO14443A card");
Serial.println("Initial tft display");
myGLCD.InitLCD();
myGLCD.setColor(0, 0, 0);
myGLCD.fillRect(1,1,319,239);
myGLCD.setColor(255, 255, 255);
myGLCD.setFont(BigFont);
myGLCD.print(String("Scanning"),0,0);
}
void loop(void) {
boolean success;
uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
// Wait for an ISO14443A type cards (Mifare, etc.). When one is found
// 'uid' will be populated with the UID, and uidLength will indicate
// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
//success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength,25);
if (success) {
Serial.println("Found a card!");
Serial.print("UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
Serial.print("UID Value: ");
String strUID;
// store UID as HEX-String to strUID and print it to display
byteToHexString(strUID, uid, uidLength, "-");
Serial.println("");
Serial.println(strUID);
myGLCD.print(strUID, CENTER, 50);
myGLCD.setColor ( 255, 0, 0 );
myGLCD.setFont ( BigFont );
myGLCD.print(String("Scanning"),0,0);
// Wait 1 second before continuing
delay(1000);
}
else
{
Serial.println("Timed out or waiting for a card");
}
}
// helper function to get UID as HEX-String
void byteToHexString(String &dataString, byte *uidBuffer, byte bufferSize, String strSeperator=":") {
dataString = "";
for (byte i = 0; i < bufferSize; i++) {
if (i>0) {
dataString += strSeperator;
if (uidBuffer[i] < 0x10)
dataString += String("0");
}
dataString += String(uidBuffer[i], HEX);
}
dataString.toUpperCase();
}
感谢您的帮助。 我不是 bitbanging SPI 的忠实粉丝。 我尝试了几种方法并尝试重新初始化等。 终于解决了
不知道为什么，当我读卡后重新初始化spi硬件时，两个模块都可以正常工作。
我读卡后刚加的代码：
lcd._hw_special_init();
赞：
success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, &uid[0], &uidLength,0);
if (success) {
lcd._hw_special_init();
//Do the rest
}