mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-04 19:55:20 +02:00
738618a945
to P0_2 but it should go to P0_0. - atrf/fw/common/io.h: IRQ_RF is now at P0_0 - atrf/fw/atspi/atspi.c: updated and simplified P0 initialization
102 lines
1.7 KiB
C
102 lines
1.7 KiB
C
/*
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* atspi/atspi.c - ATSPI initialization and main loop
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*
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* Written 2008-2010 by Werner Almesberger
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* Copyright 2008-2010 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include "regs.h"
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#include "io.h"
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#include "usb.h"
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#include "atspi/ep0.h"
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#include "version.h"
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void reset_rf(void)
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{
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int i;
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nRST_RF = 0;
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/*
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* 11.4.12: min 625 ns.
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* The pulse we generate is slightly longer than 4 us.
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*/
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for (i = 0; i != 10; i++);
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nRST_RF = 1;
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}
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static void init_io(void)
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{
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/*
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* Signal Mode Value
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*
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* MOSI push-pull 0
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* MISO open drain 1 (input)
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* SCLK push-pull 0
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* nSS push-pull 1
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* nRST_RF push-pull 1
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* IRQ_RF open drain 1 (input)
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* SLP_TR push-pull 0
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*
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* LED push-pull 0 (set up by boot loader)
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*
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* all unused open drain 0
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*/
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MOSI = 0;
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MOSI_MODE |= 1 << MOSI_BIT;
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SCLK = 0;
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SCLK_MODE |= 1 << SCLK_BIT;
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nSS_MODE |= 1 << nSS_BIT;
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nRST_RF_MODE |= 1 << nRST_RF_BIT;
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SLP_TR = 0;
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SLP_TR_MODE |= 1 << SLP_TR_BIT;
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P0 = 1; /* IRQ_RF = 1; LED = 0; the rest is unused */
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P3 = 0;
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#if 0
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/*
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* We can *almost* disable the pull-ups. The only obstacle is that
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* MISO is not driven when not in use. So we either need an external
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* pull-up/down or keep all the pull-ups on.
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*/
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/*
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* Disable pull-ups
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*/
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GPIOCN |= WEAKPUD;
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#endif
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/*
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* The manual says the reset is optional, but reality disagrees with
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* this optimistic assessment quite violently.
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*/
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reset_rf();
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}
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void main(void)
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{
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init_io();
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usb_init();
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ep0_init();
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while (1) {
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usb_poll();
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}
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}
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