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Tools: RCInput_UART PIC firmware: add informative comments

This commit is contained in:
Gustavo Jose de Sousa 2015-10-05 15:07:54 -03:00 committed by Andrew Tridgell
parent 8110104361
commit 2a7e4baa7d
1 changed files with 8 additions and 8 deletions
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16
Tools/Linux_HAL_Essentials/RCInput_UART/pic_firmware.asm
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@ -203,7 +203,7 @@ Main:
bsf STATUS, RP0
movlw (b'111'<<IRCF0)
movwf OSCCON
movwf OSCCON ; set internal oscillator frequency to 8 MHz
movlw (0<<NOT_RABPU)
movwf OPTION_REG
@ -215,9 +215,9 @@ Main:
; ||||,-- input 2
; |||||,- input 1
movlw b'11111111'
movwf TRISA
movwf WPUA
movwf IOCA
movwf TRISA ; set PORTA as input
movwf WPUA ; enable weak pull-up
movwf IOCA ; enable interrupt-on-change
; ,-------- tx
; |,------- input 6
@ -236,12 +236,12 @@ Main:
movwf TRISC
movlw (1<<TXEN|1<<BRGH)
movwf TXSTA
movwf TXSTA ; enable async transmitter and select high baud rate
movlw (1<<BRG16)
movwf BAUDCTL
movwf BAUDCTL ; 16-bit baud rate generator
movlw .16
movlw .16 ; use value 16 for SPBRG:SPBRGH to get 115200bps baud rate
movwf SPBRG
clrf SPBRGH
@ -274,7 +274,7 @@ Main:
movwf RCSTA
movlw (1<<T1CKPS0|1<<TMR1ON)
movwf T1CON
movwf T1CON ; enable timer and set frequency to 1MHz (=8Mhz/4/2)
movlw (1<<GIE|1<<PEIE|1<<RABIE)
movwf INTCON