Hi All, Presently we are working on UART driver for MCB2300 and MCB2140 Board to control and process the serial port modem device with LPC2148 and LPC2x8 uControllers.Com1 have modem functionalies(Hand shaking signals) in both where Com0 won't have.
In the schematic diagram the Com1 modem functionality pins are not connected to LPC uController, those are not clearly given.
We configure the Modem pins using PINSEL registers and enable the DTR and RTS pin in UMCR and enabled the Modem interrupts in IER.
When we connected the Modem to Com1,we are not getting any interrupts and we haven't seen any changes in MSR.
The user manual has lack of informaton for some of the registers like UTER register for software and hardware flowcontrol and MCR for auto-RTS and auto-CTS bits. The schematic diagram also not good.
Whether we have any understanding problem or confusing. My doubt is the Modem pins for COM1 are connected to LPC uController or not.If so then where they are connected in schematic diagram. Why we are not getting any interrupts for Modem.
Thanks in advance