| 1 | /* |
| 2 | Abstracted transport for reading and writing data from a UART-based |
| 3 | device such as a TMC2209 |
| 4 | |
| 5 | Written with help by Claude! |
| 6 | https://claude.ai/chat/335f50b1-3dd8-435e-9139-57ec7ca26a3c (at this time |
| 7 | chats are not shareable :( |
| 8 | */ |
| 9 | |
| 10 | #include "Adafruit_GenericDevice.h" |
| 11 | |
| 12 | /** |
| 13 | * Basic UART device class that demonstrates using GenericDevice with a Stream |
| 14 | * interface. This example shows how to wrap a Stream (like HardwareSerial or |
| 15 | * SoftwareSerial) with read/write callbacks that can be used by BusIO's |
| 16 | * register functions. |
| 17 | */ |
| 18 | class UARTDevice { |
| 19 | public: |
| 20 | UARTDevice(Stream *serial) : _serial(serial) {} |
| 21 | |
| 22 | // Static callback for writing data to UART |
| 23 | // Called by GenericDevice when data needs to be sent |
| 24 | static bool uart_write(void *thiz, const uint8_t *buffer, size_t len) { |
| 25 | UARTDevice *dev = (UARTDevice *)thiz; |
| 26 | dev->_serial->write(buffer, len); |
| 27 | return true; |
| 28 | } |
| 29 | |
| 30 | // Static callback for reading data from UART |
| 31 | // Includes timeout and will return false if not enough data available |
| 32 | static bool uart_read(void *thiz, uint8_t *buffer, size_t len) { |
| 33 | UARTDevice *dev = (UARTDevice *)thiz; |
| 34 | uint16_t timeout = 100; |
| 35 | while (dev->_serial->available() < len && timeout--) { |
| 36 | delay(1); |
| 37 | } |
| 38 | if (timeout == 0) { |
| 39 | return false; |
| 40 | } |
| 41 | for (size_t i = 0; i < len; i++) { |
| 42 | buffer[i] = dev->_serial->read(); |
| 43 | } |
| 44 | return true; |
| 45 | } |
| 46 | |
| 47 | // Create a GenericDevice instance using our callbacks |
| 48 | Adafruit_GenericDevice *createDevice() { |
| 49 | return new Adafruit_GenericDevice(this, uart_read, uart_write); |
| 50 | } |
| 51 | |
| 52 | private: |
| 53 | Stream *_serial; // Underlying Stream instance (HardwareSerial, etc) |
| 54 | }; |
| 55 | |
| 56 | void setup() { |
| 57 | Serial.begin(115200); |
| 58 | while (!Serial) |
| 59 | ; |
| 60 | delay(100); |
| 61 | |
| 62 | Serial.println("Generic Device test!"); |
| 63 | |
| 64 | // Initialize UART for device communication |
| 65 | Serial1.begin(115200); |
| 66 | |
| 67 | // Create UART wrapper and BusIO device |
| 68 | UARTDevice uart(&Serial1); |
| 69 | Adafruit_GenericDevice *device = uart.createDevice(); |
| 70 | device->begin(); |
| 71 | |
| 72 | // Test write/read cycle |
| 73 | uint8_t write_buf[4] = {0x5, 0x0, 0x0, 0x48}; |
| 74 | uint8_t read_buf[8]; |
| 75 | |
| 76 | Serial.println("Writing data..."); |
| 77 | if (!device->write(write_buf, 4)) { |
| 78 | Serial.println("Write failed!"); |
| 79 | return; |
| 80 | } |
| 81 | |
| 82 | Serial.println("Reading response..."); |
| 83 | if (!device->read(read_buf, 8)) { |
| 84 | Serial.println("Read failed!"); |
| 85 | return; |
| 86 | } |
| 87 | |
| 88 | // Print response bytes |
| 89 | Serial.print("Got response: "); |
| 90 | for (int i = 0; i < 8; i++) { |
| 91 | Serial.print("0x"); |
| 92 | Serial.print(read_buf[i], HEX); |
| 93 | Serial.print(" "); |
| 94 | } |
| 95 | Serial.println(); |
| 96 | } |
| 97 | |
| 98 | void loop() { delay(1000); } |