So I'm still looking at the hostmot2 uart/pktuart modules
for simple interfacing of microcontrollers for things like
A/D conversion, and have the vhdl end figured out.
The hostmot2 end is going to take some more work,
apparently. The pktuart module is not a drop-in replacement
for the uart. Is there an example comp file illustrating
its use, like mesa_uart.comp? I can keep mucking around
to figure out the extra parameters, but a working example
would be a time saver.
>From hostmot2.h:
int hm2_uart_setup(char *name, int bitrate, rtapi_s32 tx_mode, rtapi_s32
rx_mode);
int hm2_uart_send(char *name, unsigned char data[], int count);
int hm2_uart_read(char *name, unsigned char data[]);
int hm2_pktuart_setup(char *name, int bitrate, rtapi_s32 tx_mode, rtapi_s32
rx_mode, int txclear, int rxclear);
int hm2_pktuart_send(char *name, unsigned char data[], rtapi_u8 *num_frames,
rtapi_u16 frame_sizes[]);
int hm2_pktuart_read(char *name, unsigned char data[], rtapi_u8 *num_frames,
rtapi_u16 *max_frame_length, rtapi_u16 frame_sizes[]);
Thanks again,
-- Ralph
________________________________________
From: Peter C. Wallace [p...@mesanet.com]
Sent: Monday, January 18, 2021 9:25 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Another Mesa vhdl question
...
The UART requires the alternate instance stride (stride 1) set to 0x10
This is done in the top level file (its a awful kludge and means some
typs of modules cannot be combined)
I would suggest using the PKTUART instead as the PKTUART
uses standard instance strides (0= 0x04,1=0x40)
Peter Wallace
Mesa Electronics
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