FreeCalypso > hg > freecalypso-tools
view target-utils/libcommon/cmdentry.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 | e7502631a0f9 |
children |
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/* * This module implements ASCII command entry via the serial port, * with normal echo and minimal editing (rubout and kill). * * The command string buffer is bss-allocated here as well. It is * sized to allow a maximum-size S-record to be sent as a command, * as that is how we expect flash loading and XRAM chain-loading * to be done. */ #define MAXCMD 527 char command[MAXCMD+1]; /* * The command_entry() function takes no arguments, and begins by waiting * for serial input - hence the prompt should be printed before calling it. * * This function returns when one of the following characters is received: * CR - accepts the command * ^C or ^U - cancels the command * * The return value is non-zero if a non-empty command was accepted with CR, * or 0 if the user hit CR with no input or if the command was canceled * with ^C or ^U. In any case a CRLF is sent out the serial port * to close the input echo line before this function returns. */ command_entry() { int inlen, ch; for (inlen = 0; ; ) { ch = mygetchar(); if (ch >= ' ' && ch <= '~') { if (inlen < MAXCMD) { command[inlen++] = ch; putchar(ch); } else /* putchar(7) */; continue; } switch (ch) { case '\r': case '\n': command[inlen] = '\0'; putchar('\n'); return(inlen); case '\b': /* BS */ case 0x7F: /* DEL */ if (inlen) { putchar('\b'); putchar(' '); putchar('\b'); inlen--; } else /* putchar(7) */; continue; case 0x03: /* ^C */ putchar('^'); putchar('C'); putchar('\n'); return(0); case 0x15: /* ^U */ putchar('^'); putchar('U'); putchar('\n'); return(0); default: /* putchar(7) */; } } }