|
1 | 1 | _This manual is released by the author into the public domain._ |
2 | 2 |
|
3 | 3 | #T24C02A EEPROM set-up: |
4 | | -Connect Arduino GND to EEPROM GND. |
5 | | -Connect Arduino SDA to EEPROM SDA. |
6 | | -Connect Arduino SCL to EEPROM SCL. |
7 | | -Connect Arduino 5V to EEPROM Vcc. |
| 4 | +- Connect Arduino GND to EEPROM GND. |
| 5 | +- Connect Arduino SDA to EEPROM SDA. |
| 6 | +- Connect Arduino SCL to EEPROM SCL. |
| 7 | +- Connect Arduino 5V to EEPROM Vcc. |
8 | 8 |
|
9 | 9 | #Arduino set-up: |
10 | | -Open the Arduino IDE. |
11 | | -Connect Arduino (I used USB). |
12 | | -Choose correct board and serial port in Arduino IDE. |
13 | | -Upload code to Arduino using the IDE. |
14 | | -Open serial console (Ctrl+Shift+M). |
15 | | -The board waits 4 seconds after Arduino reset (end of upload). |
16 | | -Then it promps for I²C address. |
17 | | -If you miss this prompt, just enter the address, or if you don't know the address, enter the character 'P'. |
| 10 | +- Open the Arduino IDE. |
| 11 | +- Connect Arduino (I used USB). |
| 12 | +- Choose correct board and serial port in Arduino IDE. |
| 13 | +- Upload code to Arduino using the IDE. |
| 14 | +- Open serial console (Ctrl+Shift+M). |
| 15 | +- The board waits 4 seconds after Arduino reset (end of upload). |
| 16 | +- Then it promps for I²C address. |
| 17 | +- If you miss this prompt, just enter the address. |
| 18 | +- If you don't know the address, enter the character 'P'. |
18 | 19 |
|
19 | 20 | #Getting started: |
20 | 21 | If you opened the serial console soon enough, you'll be prompted for an I²C address or a 'P'. |
| 22 | + |
21 | 23 | If you did not open the serial console within four seconds after the Arduino reset, you will not see the prompt, but the Arduino will still patiently wait for your input. |
| 24 | + |
22 | 25 | Enter the address, or the character 'P'. |
| 26 | + |
23 | 27 | ##The address: |
24 | | - The Arduino wire library works with 7-bit adresses. |
25 | | - The Arduino Serial library can easily parse decimal values, not hex codes. |
26 | | - Therefore the default T24C02A address 0xA0 is rendered thus: |
27 | | - Shift right one bit to get 7-bit address: 0xA0 >> 1 → 0x50 |
28 | | - Convert to decimal: 0x50 → 5×16 + 0 = 80 |
| 28 | +__The Arduino wire library works with 7-bit adresses.__ |
| 29 | + |
| 30 | +The Arduino Serial library can easily parse decimal values, not hex codes. |
| 31 | + |
| 32 | +Therefore the default T24C02A address 0xA0 is rendered thus: |
| 33 | + |
| 34 | +Shift right one bit to get 7-bit address: 0xA0 >> 1 → 0x50 |
| 35 | + |
| 36 | +Convert to decimal: 0x50 → 5×16 + 0 = 80 |
29 | 37 | ##Polling: |
30 | | - If you entered the character 'P', the Arduino will poll all 128 possible addresses on the I²C bus. |
31 | | - It wil show you the address + answer of the devices that answered. |
32 | | -If you have successfully entered the address, you will be in the main shell menu. |
| 38 | +If you entered the character 'P', the Arduino will poll all 128 possible addresses on the I²C bus. |
| 39 | +It wil show you the address + answer of the devices that answered. |
33 | 40 |
|
34 | 41 | #The main menu: |
| 42 | +Once you have successfully entered an address, you will arrive in the main shell menu. |
| 43 | + |
35 | 44 | You will be asked for a command char: |
36 | | - R — Read |
37 | | - W — Write |
38 | | - S — Set I²C address |
39 | | - useful if you set it wrong, have multiple EEPROMs or have a T24C04A, T24C08A or T24C16A IC. |
40 | | - P — Re-poll the I²C bus. |
| 45 | + R — Read |
| 46 | + W — Write |
| 47 | + S — Set I²C address _useful if you set it wrong, have multiple EEPROMs or have a T24C04A, T24C08A or T24C16A IC._ |
| 48 | + P — Poll the I²C bus. |
41 | 49 | ##Reading: |
42 | | - Follow the instruction: |
43 | | - Enter the start address for the read. |
44 | | - Enter the number of bytes to be read. |
45 | | - The device will print all characters on a single line. |
46 | | - Followed by a line of statistics. |
47 | | - Optionally followed by a line indicating an error. |
| 50 | +- Follow the instruction: |
| 51 | + - Enter the start address for the read. |
| 52 | + - Enter the number of bytes to be read. |
| 53 | +- The device will print all characters on a single line. |
| 54 | +- Followed by a line of statistics. |
| 55 | +- Optionally followed by a line indicating an error. |
48 | 56 | ##Writing: |
49 | | - Follow the instruction: |
50 | | - Enter the start address for the write. |
51 | | - Enter the string to be written. |
52 | | - Escape numerical ASCII representations of characters by prefixing them with an '@'. |
53 | | - @64 is the @ character itself. |
54 | | - The device will print each character submitted to the device. |
55 | | - The device will print a human readable error message for each unsuccessful write. |
56 | | - The device will retransmit (including reprint of) the character up to NUM_TRIES times. |
57 | | - NUM_TRIES is set to 10 by default in the code. |
58 | | - After ten failed tries the device: |
59 | | - Will print an error message indication. |
60 | | - It will skip this address. |
61 | | - It will continue to write the next character to the next location in the EEPROM. |
| 57 | +- Follow the instruction: |
| 58 | + - Enter the start address for the write. |
| 59 | + - Enter the string to be written. |
| 60 | + _Escape numerical ASCII representations of characters by prefixing them with an '@'._ |
| 61 | + _@64 is the @ character itself, in case you want to write an actual @._ |
| 62 | +- The device will print each character submitted to the device. |
| 63 | +- The device will print a human readable error message for each unsuccessful write. |
| 64 | +- The device will retransmit (including reprint of) the character up to NUM_TRIES times. |
| 65 | + _<NUM_TRIES> is set to 10 by default in the code._ |
| 66 | +__After ten failed tries the device:__ |
| 67 | + - Will print an error message indication. |
| 68 | + - It will skip this address. |
| 69 | + - It will continue to write the next character to the next location in the EEPROM. |
62 | 70 | ##Setting the I²C address: |
63 | | - The same procedure as detailed in the section "Getting Started", see above. |
| 71 | +The same procedure as detailed in the section "Getting Started", see above. |
64 | 72 | ##Polling: |
65 | | - The same procedure as detailed in the section "Getting Started", see above. |
66 | | - This polling is not done as part of a change of address. |
67 | | - The device will give information on the polled devices, and return to the menu. |
| 73 | +The same procedure as detailed in the section "Getting Started", see above. |
| 74 | + This polling is not done as part of a change of address. Therefore, the device will give information on the polled devices, and return to the menu immediately afterwards. |
0 commit comments