Arduino 精要
来自Jack's Lab
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[[I2C 总线精要]] | [[I2C 总线精要]] | ||
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| + | [[I2S]] 总线精要 | ||
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| + | [[ADC]] | ||
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| + | [[UART_体系结构]] 3.3V-5V 电平转换:Sipex SP3222E/3232E | ||
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== 扩展 == | == 扩展 == | ||
| − | [[Arduino Ethernet 的另一性价比选择]] | + | [[Arduino Ethernet 的另一性价比选择]] [https://www.arduino.cc/en/uploads/Main/arduino-Ethernet-Shield2-V2-sch.pdf W5500 Ethernet Shield v1.0] |
[[DHT21/AM2301 数字温湿度传感器]] | [[DHT21/AM2301 数字温湿度传感器]] | ||
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[[RS485]] | [[RS485]] | ||
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| + | [[MBus]] | ||
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| + | [[RFID]] | ||
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| + | [[LoRa]] | ||
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| + | [[GPS]] | ||
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| + | [[FT2232]] | ||
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| + | [[LEON3]] | ||
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| + | [[Geiger]] | ||
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| + | [[Relay]] | ||
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[[ATtiny13]] | [[ATtiny13]] | ||
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| + | [[Eagle Tips]] | ||
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| + | [[Raspberry]] | ||
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| + | [[Modbus]] | ||
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| + | [[DLT645]] | ||
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| + | [[CJT188]] | ||
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| + | [[Tesla]] | ||
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| + | [[Power]] | ||
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| + | == Reference == | ||
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| + | * HTTP Spec: https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html | ||
| + | * https://zh.wikipedia.org/wiki/ASCII | ||
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2017年10月18日 (三) 20:36的最后版本
目录 |
[编辑] 1 总览
I2S 总线精要
UART_体系结构 3.3V-5V 电平转换:Sipex SP3222E/3232E
[编辑] 2 扩展
Arduino Ethernet 的另一性价比选择 W5500 Ethernet Shield v1.0
Encoder 旋转编码器
MC105 可燃气体传感器
Digipot 数字电位器
[编辑] 3 应用
[编辑] 4 精华
[编辑] 5 糖豆
[编辑] 5.1 float2str
String(NUMBER, SCALE); String(3.141592,5); # "3.14159"
[编辑] 5.2 Software Serial
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
void setup()
{
// set the data rate for the SoftwareSerial port
mySerial.begin(4800);
mySerial.println("Hello, world?");
}
void loop()
{
if (mySerial.available())
mySerial.write(Serial.read());
}
[编辑] 5.3 AT CMD
SerialEvent() is called after a loop(), if there is serial data in the buffer.
String input_str = ""; // a string to hold incoming data
boolean str_over = false; // whether the string is complete
void setup() {
Serial.begin(9600);
input_str.reserve(200); // reserve 200 bytes for the inputString:
}
void loop() {
if (str_over) {
// Identify the CMD and processing
input_str = ""; // clear the string buffer
str_over = false;
}
}
/*
* SerialEvent occurs whenever a new data comes in the hardware serial RX.
* This routine is run between each time loop() runs, so using delay inside
* loop can delay response. Multiple bytes of data may be available.
*/
void serialEvent() {
while (Serial.available()) {
char in = (char)Serial.read();
input_str += in;
if (in == '\n') { // read a line into string buffer
str_over = true;
}
}
}
[编辑] 5.4 Hex str to ull
char hexstr2bin(char c) {
if (isdigit(c)) { // 0 - 9
return c - '0';
} else if (isxdigit(c)) { // A-F, a-f
return (c & 0xF) + 9;
}
return -1;
}
unsigned long long hexstr2ull(char * string)
{
unsigned long long x =0;
char c;
do {
c = hexstr2bin(*string++);
if (c < 0)
break;
x = (x << 4) | c;
} while (1);
return x;
}
[编辑] 6 资源
- 二极管选型指南:http://www.vishay.com/docs/49627/49627.pdf
- 将电解电容器更换为MLCC的指南
- MCU 3V Tips
- 電容器阻抗/ESR頻率特性
- 低压差调节器—为什么选择旁路电容很重要
- 精算陶瓷電容性能表現
- http://www.robopeak.com/blog/?p=107
- spi flash: http://forum.arduino.cc/index.php?topic=178462.0
- http://www.avrfreaks.net/forum/winbond-spi-flash-library-avr-arduino-written-c
- avr-libc user manual: http://www.nongnu.org/avr-libc/user-manual/modules.html
[编辑] 7 Notes
[编辑] 8 Reference
- HTTP Spec: https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html
- https://zh.wikipedia.org/wiki/ASCII