Hello,
I'm trying to use LPC1788 OEM board together with SC18IS606 circuit via I2C bus.
For I2C bus i am using LPCOPEN drivers, the latest version. Also, in my application i am using LWIP stack for an ethernet communication and an UART connection. These other two communication types are working fine, but i have an issue on I2C bus.
I2C signals are connected to pin 108 (I2C0_SCL) and pin 109 (I2C0_SDA) from OEM board. In application i setup these signals to P5[2] and P5[3] with IOCON_FUNC5 and I initialized I2C0 to work in polling mode with 100 kHz speed. I2C slave address is 0x50.
My issue is that after i send a first command to SC18IS606, SDA and SCL goes to LOW and I can not send another command on I2C bus. I can not figure out what is happening because I used in past the same LPC1788 OEM board and I2C LPCOpen drivers with another circuit, TMP422 and everything worked fine.
After I2C is initialized, I wrote to SC18IS606 to send me the version (0xFE function id), but after the command is sent, I2C bus is stuck.
Of course I want to use this circuit for I2C to SPI bridge. But after first command (does not matter what command is sent - SPI configuration, Idle command, Read version command), SDA and SCL goes to LOW state even if I have pullup rezistor on these lines.
Thank you,
Denisa
