mirror of
https://github.com/UberGuidoZ/Flipper.git
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49 lines
1.7 KiB
JavaScript
49 lines
1.7 KiB
JavaScript
// Connect an 24C32N EEPROM to the I2C bus of the board. SDA=pin 15, SCL=pin 16, VCC=pin 9, GND=pin 8.
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let i2c = require("i2c");
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function i2c_find_first_device() {
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let addr = -1;
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for (let try_addr = 0; try_addr !== 0xff; try_addr++) {
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if (i2c.isDeviceReady(try_addr, 5)) {
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addr = try_addr;
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break;
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}
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}
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return addr;
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}
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let addr = i2c_find_first_device();
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if (addr === -1) {
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print("I2C device not found");
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print("Please connect a 24C32N EEPROM I2C device to the Flipper Zero.");
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print("SDA=pin 15, SCL=pin 16, VCC=pin 9, GND=pin 8.");
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} else {
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print("I2C device found at address: " + to_hex_string(addr));
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delay(1000);
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// first two bytes are the start address (0x0000)
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// the remaining bytes are the data to store.
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// can also use Uint8Array([0x00, 0x00, ...]) as write parameter
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i2c.write(addr, [0x00, 0x00, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47]);
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while (i2c.isDeviceReady(addr, 9) === false) {
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print("Waiting for device to be ready...");
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}
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// write the address to read from (we start at address 0x0001)
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// read 3 bytes - 0x42, 0x43, 0x44
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let data_buf = i2c.writeRead(addr, [0x00, 0x01], 3, 100);
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let data = Uint8Array(data_buf);
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print("Read bytes: " + to_string(data.length));
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for (let i = 0; i < data.length; i++) {
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print("data[" + to_string(i) + "] = " + to_hex_string(data[i]));
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}
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// read two more bytes (0x45, 0x46) from current address
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data_buf = i2c.read(addr, 2);
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data = Uint8Array(data_buf);
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print("Read bytes: " + to_string(data.length));
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for (let i = 0; i < data.length; i++) {
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print("data[" + to_string(i) + "] = " + to_hex_string(data[i]));
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}
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}
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