FreeCalypso > hg > fc-tourmaline
view src/cs/system/bootloader/inc/serial.h @ 280:82665effff30
keypad boot init overhaul: handle initially held-down keys
This change fixes two previous behavioural defects:
1) On Compal phones, the PWR key had to be released before the boot
sequence would proceed at all - it was stuck in an endless IRQ loop
at the point of Nucleus enabling interrupts, before anything else.
2) On both Compal and sane platforms including Luna, if some regular
non-PWR key was held down at boot time, the boot sequence would
proceed and complete normally, but all non-PWR keypad buttons would
be dead for the remainder of that boot cycle.
The fix is a generic solution - no Compal-specific hack ended up being
needed for the special case of their idiotic PWON-to-ROW4 hw wiring.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 24 Sep 2021 00:47:12 +0000 |
parents | 4e78acac3d88 |
children |
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/******************************************************************************* * * SERIAL.H * * This module contains functions to send or receive commands on the USART 8251. * Only polled mode is used. * * (C) Texas Instruments 1998 * ******************************************************************************/ #ifndef __SERIAL_H__ #define __SERIAL_H__ #include "main/sys_types.h" /* * ser_receive_command and ser_receive_char have 2 modes: * SER_INFINITE : Waits until a command is received. * SER_IMMEDIATE: Returns imediately even if no character is received. */ enum { SER_INFINITE, SER_IMMEDIATE }; /* * Return values of ser_receive_data_for_flash. */ enum { SER_DATA_READY, SER_DATA_ERROR, SER_END_OF_FILE }; extern void ser_wait_no_activity (SYS_UWORD8 device_id); extern long ser_send_command (SYS_UWORD8 *command, SYS_UWORD8 device_id); extern SYS_UWORD8 ser_receive_command (SYS_UWORD8 *command, int mode); extern long ser_receive_data_for_flash (SYS_UWORD32 *address, SYS_UWORD16 *data, SYS_UWORD8 device_id); extern void ser_initialize_flash_data_detection (void); extern void ser_initialize_serial_link (void); extern void ser_wait_last_character_sent (SYS_UWORD8 device_id); #endif /* __SERIAL_H__ */