mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-12-24 15:33:20 +02:00
8f744bba63
- atrf/fw/atspi/atspi.c (main): add a delay to give the host more time to - atrf/fw/atspi/descr.c: we don't use EP1, so simplify the descriptors we send. Keep the EP1 descriptors around (commented out) in case we need them later, e.g., for interrupts.
110 lines
1.9 KiB
C
110 lines
1.9 KiB
C
/*
|
|
* atspi/atspi.c - ATSPI initialization and main loop
|
|
*
|
|
* Written 2008-2010 by Werner Almesberger
|
|
* Copyright 2008-2010 Werner Almesberger
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
|
|
#include "regs.h"
|
|
#include "io.h"
|
|
#include "usb.h"
|
|
#include "atspi/ep0.h"
|
|
#include "version.h"
|
|
|
|
|
|
void reset_rf(void)
|
|
{
|
|
int i;
|
|
|
|
nRST_RF = 0;
|
|
/*
|
|
* 11.4.12: min 625 ns.
|
|
* The pulse we generate is slightly longer than 4 us.
|
|
*/
|
|
for (i = 0; i != 10; i++);
|
|
nRST_RF = 1;
|
|
}
|
|
|
|
|
|
static void init_io(void)
|
|
{
|
|
/*
|
|
* Signal Mode Value
|
|
*
|
|
* MOSI push-pull 0
|
|
* MISO open drain 1 (input)
|
|
* SCLK push-pull 0
|
|
* nSS push-pull 1
|
|
* nRST_RF push-pull 1
|
|
* IRQ_RF open drain 1 (input)
|
|
* SLP_TR push-pull 0
|
|
*
|
|
* LED push-pull 0 (set up by boot loader)
|
|
*
|
|
* all unused open drain 0
|
|
*/
|
|
|
|
MOSI = 0;
|
|
MOSI_MODE |= 1 << MOSI_BIT;
|
|
|
|
SCLK = 0;
|
|
SCLK_MODE |= 1 << SCLK_BIT;
|
|
|
|
nSS_MODE |= 1 << nSS_BIT;
|
|
|
|
nRST_RF_MODE |= 1 << nRST_RF_BIT;
|
|
|
|
SLP_TR = 0;
|
|
SLP_TR_MODE |= 1 << SLP_TR_BIT;
|
|
|
|
P0 = 1; /* IRQ_RF = 1; LED = 0; the rest is unused */
|
|
P3 = 0;
|
|
|
|
#if 0
|
|
/*
|
|
* We can *almost* disable the pull-ups. The only obstacle is that
|
|
* MISO is not driven when not in use. So we either need an external
|
|
* pull-up/down or keep all the pull-ups on.
|
|
*/
|
|
|
|
/*
|
|
* Disable pull-ups
|
|
*/
|
|
GPIOCN |= WEAKPUD;
|
|
#endif
|
|
|
|
/*
|
|
* The manual says the reset is optional, but reality disagrees with
|
|
* this optimistic assessment quite violently.
|
|
*/
|
|
|
|
reset_rf();
|
|
}
|
|
|
|
|
|
void main(void)
|
|
{
|
|
int i;
|
|
|
|
init_io();
|
|
|
|
/*
|
|
* Make sure the host has enough time (2.5 us) to detect that we reset
|
|
* our USB stack.
|
|
*/
|
|
for (i = 0; i != 10; i++);
|
|
|
|
usb_init();
|
|
ep0_init();
|
|
|
|
while (1) {
|
|
usb_poll();
|
|
}
|
|
}
|