mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-12-24 18:19:54 +02:00
4e568b0f1a
- cntr/cntr.h: new file for variables shared among cntr.c and ep0.c - cntr/cntr.c (cntr), cntr/ep0.c (cntr): moved to cntr/cntr.h - fw/common/io.h (VERSION_ID): we can detect the board version by reading P2_1 (GND on version 1, open on version 2) - cntr/cntr.c (init_io): added board version detection, board-specific GPIO initialization, and a LED blink to indicate version 2 - cntr/cntr.h (hw_type), cntr/cntr.c (hw_type), cntr/ep0.c (my_setup), common/config.h (HW_TYPE): the hardware type is now determined at run time
138 lines
3.1 KiB
C
138 lines
3.1 KiB
C
/*
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* cntr/ep0.c - EP0 extension protocol
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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 <stdint.h>
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#ifndef NULL
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#define NULL 0
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#endif
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#include "regs.h"
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#include "usb.h"
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#include "cntr/ep0.h"
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#include "version.h"
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#include "cntr.h"
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#define debug(...)
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#define error(...)
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/*
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* SDCC 2.8.0 had a number of code generation bugs that appeared in the big
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* switch statement of my_setup. SDCC_FORCE_UPDATE forced the value of the
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* "size" variable to be written to memory. This work-around doesn't seem
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* to be necessary with 2.9.0, but we keep it around, just in case.
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*
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* Unfortunately, the setup->bRequest garbling bug is still with us. Without
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* the evaluation forced with SDCC_FORCE_EVAL, sdcc gets confused about the
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* value of setup->bRequest and then rejects all SETUP requests.
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*/
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#define SDCC_FORCE_EVAL(type, value) \
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do { \
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static volatile type foo; \
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foo = value; \
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} while (0)
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#define SDCC_FORCE_UPDATE(type, var) \
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do { \
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volatile type foo; \
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foo = var; \
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var = foo; \
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} while (0)
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static uint8_t id[3] = {
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EP0CNTR_MAJOR, EP0CNTR_MINOR,
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/* hw type is set at run time */
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};
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static __xdata uint8_t buf[128];
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#define BUILD_OFFSET 7 /* '#' plus "65535" plus ' ' */
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/* crc32() */
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#include "cntr/crc32.c"
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static __bit my_setup(struct setup_request *setup) __reentrant
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{
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uint32_t tmp;
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uint8_t size, i;
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switch (setup->bmRequestType | setup->bRequest << 8) {
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case CNTR_FROM_DEV(CNTR_ID):
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debug("CNTR_ID\n");
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if (setup->wLength > 3)
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return 0;
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id[2] = hw_type;
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usb_send(&ep0, id, setup->wLength, NULL, NULL);
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return 1;
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case CNTR_FROM_DEV(CNTR_BUILD):
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debug("CNTR_BUILD\n");
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tmp = build_number;
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for (i = BUILD_OFFSET-2; tmp; i--) {
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buf[i] = (tmp % 10)+'0';
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tmp /= 10;
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}
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buf[i] = '#';
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buf[BUILD_OFFSET-1] = ' ';
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for (size = 0; build_date[size]; size++)
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buf[BUILD_OFFSET+size] = build_date[size];
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size += BUILD_OFFSET-i+1;
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SDCC_FORCE_EVAL(uint8_t, setup->bRequest);
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if (size > setup->wLength)
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return 0;
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usb_send(&ep0, buf+i, size, NULL, NULL);
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return 1;
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case CNTR_TO_DEV(CNTR_RESET):
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debug("CNTR_RESET\n");
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RSTSRC = SWRSF;
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while (1);
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case CNTR_FROM_DEV(CNTR_READ):
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debug("CNTR_READ\n");
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buf[0] = cntr[0];
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buf[1] = cntr[1];
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buf[2] = cntr[2];
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buf[3] = cntr[3];
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tmp = (uint32_t) buf[0] | ((uint32_t) buf[1] << 8) |
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((uint32_t) buf[2] << 16) | ((uint32_t) buf[3] << 24);
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tmp = crc32(tmp, 0xffffffff);
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buf[4] = tmp;
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buf[5] = tmp >> 8;
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buf[6] = tmp >> 16;
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buf[7] = tmp >> 24;
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buf[8] = ~cntr[0];
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buf[9] = ~cntr[1];
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buf[10] = ~cntr[2];
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buf[11] = ~cntr[3];
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usb_send(&ep0, buf, 12, NULL, NULL);
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return 1;
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default:
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error("Unrecognized SETUP: 0x%02x 0x%02x ...\n",
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setup->bmRequestType, setup->bRequest);
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return 0;
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}
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}
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void ep0_init(void)
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{
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user_setup = my_setup;
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}
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