FreeCalypso > hg > freecalypso-tools
view target-utils/libcommon/buzzer.c @ 497:74610c4f10f7
target-utils: added 10 ms delay at the end of abb_power_off()
The deosmification of the ABB access code (replacement of osmo_delay_ms()
bogus delays with correctly-timed ones, which are significantly shorter)
had one annoying side effect: when executing the poweroff command from
any of the programs, one last '=' prompt character was being sent (and
received by the x86 host) as the Calypso board powers off. With delays
being shorter now, the abb_power_off() function was returning and the
standalone program's main loop was printing its prompt before the Iota chip
fully executed the switch-off sequence!
I thought about inserting an endless tight loop at the end of the
abb_power_off() function, but the implemented solution of a 10 ms delay
is a little nicer IMO because if the DEVOFF operation doesn't happen for
some reason in a manual hacking scenario, there won't be an artificial
blocker in the form of a tight loop keeping us from further poking around.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 25 May 2019 20:44:05 +0000 |
parents | 4be951811791 |
children |
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/* * Commands for exercising the Calypso's buzzer output, whatever * actual hardware (piezo buzzer or vibrator) it may be driving * on a given Calypso device. */ #include <sys/types.h> #include "types.h" extern u_long strtoul(); #define ARMIO_LOAD_TIM (*(volatile u16 *) 0xFFFE4808) #define BUZZ_LIGHT_REG (*(volatile u16 *) 0xFFFE480E) #define BUZZ_LEVEL_REG (*(volatile u16 *) 0xFFFE4812) void cmd_buzlev(argbulk) char *argbulk; { char *argv[2]; u32 arg; if (parse_args(argbulk, 0, 1, argv, 0) < 0) return; if (argv[0]) { arg = strtoul(argv[0], 0, 0); if (arg > 0xFFFF) { printf("ERROR: argument out of range\n"); return; } BUZZ_LEVEL_REG = arg; } else printf("%04X\n", BUZZ_LEVEL_REG); } void cmd_buz(argbulk) char *argbulk; { char *argv[2]; u32 arg; int c; if (parse_args(argbulk, 1, 1, argv, 0) < 0) return; arg = strtoul(argv[0], 0, 0); if (arg > 0xFFFF) { printf("ERROR: argument out of range\n"); return; } ARMIO_LOAD_TIM = arg; BUZZ_LIGHT_REG = 1; for (;;) { c = serial_in_poll(); if (c >= 0) break; } BUZZ_LIGHT_REG = 0; }