ahoneybun/qmk_firmware
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Updated John Steggall's software USART in the XPLAINBridge project.

Browse source
This commit is contained in:
Dean Camera 2009-11-26 01:17:29 +00:00
parent ab602a8b48
commit f37d21bbe9
5 changed files with 239 additions and 72 deletions
Download patch file Download diff file Expand all files Collapse all files

20
Projects/XPLAINBridge/Lib/SoftUART.h
View file

@ -2,6 +2,8 @@
soft_uart
v0.2
Copyright John Steggall 2009
*/
@ -30,17 +32,31 @@
*/
/*
Specifically designed for the xplain board, other uses could be made by furkling through the code
and replacing the port and pin assignments. Also relies on and external interupt to detect the low
Specifically designed for the xplain board, other uses could be made by adjusting uart_soft_conf.h
replacing the port, pin and timer assignments. Also relies on and external interupt to detect the low
level of the start bit, in this case INT0.
Always configured to 9600baud. Can be changed by setting the BITLENGTH define to F_CPU/(desired baud)
code may need optimising when getting any faster to sample the bit in the correct place. No
compensation has been made for the response time of the int routine.
Note: Configured to use 16bit timers.
*/
/* Changes
*
* v0.2
* - Added configuration file to ease pain of setup for different hardware configuration
* - Changed bit access for ports that can be accessed directly
* - Fixed atomic section in uart_init to encompass counter read
*/
#ifndef UART_SOFT_H
#define UART_SOFT_H
/* status */
extern uint8_t status;
/* initialises software uart and enables transmit */
extern void SoftUART_Init(void);