pinephone-keyboard/firmware/stock-ivt.asm
Ondrej Jirman 6a5fe581b9 Implement flashing over I2C and user/stock firmware support
I2C register layout changed a bit to make various operations easier
to implement in FW and for the user.

Flashing/debugging tools now share more code. Firmware is now more
configurable (it's now possible to compile-out various features).

Self-testing for column-shorts is implemented.

Firmware is optimized for low power consumption.
2021-06-28 15:09:47 +02:00

102 lines
2.3 KiB
NASM

/**
* Pinephone Keyboard Firmware
*
* Copyright (C) 2021 Ondřej Jirman <megi@xff.cz>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "em85f684a.h"
.area RSEG (ABS,DATA)
.org 0x0000
ar0 = 0x00
psw0 = 0xd0
.macro irq_user irq
. = (ivct_start + irq * 8 + 3)
ljmp (irq * 8 + 0x4003)
.ds 5
.endm
.macro irq_ignore irq
. = (ivct_start + irq * 8 + 3)
reti
.ds 7
.endm
.macro irq_stock irq, name
. = (ivct_start + irq * 8 + 3)
push psw0
push ar0
mov r0, #_stock_flag
ajmp name
.endm
.macro irq_stock_fwd irq, name
name'_fwd:
cjne @r0, #1, 001$
pop ar0
pop psw0
ljmp name
001$:
pop ar0
pop psw0
ljmp (irq * 8 + 0x4003)
.endm
.module ivect
.area IVECT (REL)
ivct_start = .
ljmp __sdcc_gsinit_startup
irq_ignore 5
irq_ignore 9
irq_ignore 13
irq_ignore 19
irq_ignore 21
irq_ignore 22
irq_ignore 25
irq_ignore 26
irq_ignore 27
irq_user IRQ_EINT0
irq_user IRQ_TIMER0
irq_user IRQ_EINT1
irq_stock IRQ_TIMER1, _timer1_interrupt_fwd
irq_user IRQ_UART0
irq_stock IRQ_PINCHANGE, _pinchange_interrupt_fwd
irq_user IRQ_LVD
irq_user IRQ_SYSTEMHOLD
irq_user IRQ_INT2_3
irq_user IRQ_SPI
irq_user IRQ_PWMD
irq_user IRQ_PWME
irq_user IRQ_PWMF
irq_user IRQ_TIMER3
irq_user IRQ_PWMA
irq_user IRQ_USB
irq_stock IRQ_USB _usb_interrupt_fwd
irq_user IRQ_I2CA
irq_user IRQ_PWMB
irq_user IRQ_PWMC
irq_stock IRQ_I2CB _i2c_b_interrupt_fwd
irq_stock_fwd IRQ_TIMER1, _timer1_interrupt
irq_stock_fwd IRQ_PINCHANGE, _pinchange_interrupt
irq_stock_fwd IRQ_I2CB, _i2c_b_interrupt
irq_stock_fwd IRQ_USB, _usb_interrupt