mirror of
git://projects.qi-hardware.com/wernermisc.git
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161 lines
4.0 KiB
C
161 lines
4.0 KiB
C
/*
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* labsw/ep0.c - EP0 extension protocol
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*
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* Written 2008-2011 by Werner Almesberger
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* Copyright 2008-2011 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 "labsw/ep0.h"
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#include "io.h"
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#include "version.h"
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extern int local;
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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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EP0LABSW_MAJOR, EP0LABSW_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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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 LABSW_FROM_DEV(LABSW_ID):
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size = setup->wLength;
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if (size > 3)
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size = 3;
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id[2] = 0; /* hardware type */
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usb_send(&ep0, id, size, NULL, NULL);
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return 1;
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case LABSW_FROM_DEV(LABSW_BUILD):
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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 LABSW_TO_DEV(LABSW_RESET):
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RSTSRC = SWRSF;
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while (1);
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case LABSW_FROM_DEV(LABSW_GET):
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size = setup->wLength;
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if (size > 2)
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size = 2;
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buf[0] =
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(IN_1 ? 0 : LABSW_IN1) |
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(IN_2 ? 0 : LABSW_IN2) |
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(IN_3 ? 0 : LABSW_IN3) |
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(IN_4 ? 0 : LABSW_IN4);
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buf[1] =
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(BUT_MAIN ? 0 : LABSW_BUT_MAIN) |
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(BUT_CH1 ? 0 : LABSW_BUT_CH1) |
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(BUT_CH2 ? 0 : LABSW_BUT_CH2);
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usb_send(&ep0, buf, size, NULL, NULL);
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return 1;
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case LABSW_TO_DEV(LABSW_SET):
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local = !setup->wIndex;
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if (setup->wIndex & LABSW_CH1_RELAY)
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CH1_RELAY = setup->wValue & LABSW_CH1_RELAY ? 1 : 0;
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if (setup->wIndex & LABSW_CH1_OPT)
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CH1_OPT = setup->wValue & LABSW_CH1_OPT ? 0 : 1;
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if (setup->wIndex & LABSW_CH2_RELAY)
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CH2_RELAY = setup->wValue & LABSW_CH2_RELAY ? 1 : 0;
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if (setup->wIndex & LABSW_CH2_OPT)
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CH2_OPT = setup->wValue & LABSW_CH2_OPT ? 0 : 1;
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if (setup->wIndex & LABSW_OUT1)
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OUT_1 = setup->wValue & LABSW_OUT1 ? 0 : 1;
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if (setup->wIndex & LABSW_OUT2)
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OUT_2 = setup->wValue & LABSW_OUT2 ? 0 : 1;
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if (setup->wIndex & LABSW_OUT3)
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OUT_3 = setup->wValue & LABSW_OUT3 ? 0 : 1;
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if (setup->wIndex & LABSW_OUT4)
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OUT_4 = setup->wValue & LABSW_OUT4 ? 0 : 1;
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if (setup->wIndex & LABSW_MAIN_R)
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LED_MAIN_R = setup->wValue & LABSW_MAIN_R ? 1 : 0;
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if (setup->wIndex & LABSW_MAIN_G)
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LED_MAIN_G = setup->wValue & LABSW_MAIN_G ? 1 : 0;
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if (setup->wIndex & LABSW_CH1_R)
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LED_CH1_R = setup->wValue & LABSW_CH1_R ? 1 : 0;
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if (setup->wIndex & LABSW_CH1_G)
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LED_CH1_G = setup->wValue & LABSW_CH1_G ? 1 : 0;
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if (setup->wIndex & LABSW_CH2_R)
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LED_CH2_R = setup->wValue & LABSW_CH2_R ? 1 : 0;
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if (setup->wIndex & LABSW_CH2_G)
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LED_CH2_G = setup->wValue & LABSW_CH2_G ? 1 : 0;
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return 1;
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default:
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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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