FreeCalypso > hg > freecalypso-tools

annotate target-utils/c139explore/main.c @ 497:74610c4f10f7

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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 f24b31082605
children da53ea0a38ba
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1 #include "types.h"
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3 main()
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4 {
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5 /* delay kludge workaround for defect in fc-compalram */
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6 osmo_delay_ms(30);
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7 printf("C139 hardware exploration utility running\n");
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8 /* GPIO init */
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9 *(volatile u16 *)0xfffe4802 = 0x0002;
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10 *(volatile u16 *)0xfffe4804 = 0xFFF5;
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f24b31082605 c139explore: turn on ARMIO module clock, needed to exercise the buzzer
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11 *(volatile u16 *)0xfffe4806 = 0xFFF3; /* enable ARMIO clock */
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12 /* take peripherals out of reset */
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13 *(volatile u16 *)0xfffffd04 = 0xFFF3;
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14 abb_init();
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15 uwire_init();
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16 for (;;) {
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17 putchar('=');
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18 if (command_entry())
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19 command_dispatch();
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20 }
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21 }