| ??? 05/28/07 13:58 Read: times |
#139916 - I2C eeprom 24c02 byte write stuck in ack |
Hello,
I'm new to the list and actually developping I2C bus driver routines on a MSC1210Y5/22MHz board with SDCC 2.7.0svn. I have read messages from this thread which descirbes exactly my concern: http://www.8052.com/forum/read.phtml?id=136747 ... but didn't find the clue to solve my problem. You can find a copy of my own code at the following address: http://www.linux-france.org/prj/embed...eeprom.zip . i2c routines are in the i2c_msc1210.h file . sample program is called sdcc_i2c_eeprom.c (I tried to write all comments in english) Before to post I have spent hours running tests and reading application notes, especially the 24c02c microchip pdf. I found the "Acknowledge polling flow" section but I don't understand how to apply it as long as I don't get any ack from the chip before to send stop condition to initiate the write cycle. On the timing side, I'm using a while software delay loop that consumes a lot of time. I'm not looking to stress communications to the 100KHz limit. Thanks in advance for your help. Regards, - Philippe |
| Topic | Author | Date |
| I2C eeprom 24c02 byte write stuck in ack | 01/01/70 00:00 | |
| timing | 01/01/70 00:00 | |
| timing | 01/01/70 00:00 | |
| what\'s the problem, exactly? | 01/01/70 00:00 | |
| timing | 01/01/70 00:00 | |
| how do you know that? | 01/01/70 00:00 | |
| How do you know that? | 01/01/70 00:00 | |
| do you have some other version of code? | 01/01/70 00:00 | |
| do you have some other version of code? | 01/01/70 00:00 | |
| A work around For That | 01/01/70 00:00 | |
| work around For That | 01/01/70 00:00 | |
| Well in my guess, you have same problem:-) as mine | 01/01/70 00:00 | |
| Polling the 24C02 EEPROM for ready | 01/01/70 00:00 | |
| OOPS wrong logic | 01/01/70 00:00 | |
| I thought that I should try your code | 01/01/70 00:00 | |
| Polling the 24C02 EEPROM for ready | 01/01/70 00:00 | |
| great, but do not forget to mention | 01/01/70 00:00 | |
| The Clock | 01/01/70 00:00 | |
addition - show the full picture - 'edit' to above | 01/01/70 00:00 | |
| i2c function signatures | 01/01/70 00:00 | |
| hello friend | 01/01/70 00:00 |