mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-25 16:09:42 +02:00
Completed the basic counter firmware. Now it just has to work ...
- cntr/fw/cntr/Makefile, cntr/fw/cntr/descr.c, cntr/fw/cntr/ep0.c: enabled the usual USB stack - cntr/fw/cntr/cntr.c: initialize and poll USB - cntr/fw/cntr/cntr.c, cntr/fw/cntr/ep0.c: added counter application - cntr/fw/common/config.h (PLATFORM_SETUP): enable the crossbar
This commit is contained in:
Werner Almesberger
parent
5109e0bd44
commit
5514c336a5
@ -12,7 +12,7 @@
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MAIN = cntr
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OBJS = $(MAIN) # usb descr version ep0
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OBJS = $(MAIN) usb descr version ep0
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F32XBASE = ../../../../f32xbase
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@ -11,6 +11,8 @@
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*/
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#include <stdint.h>
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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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@ -18,6 +20,16 @@
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#include "version.h"
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/*
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* Free-running 32 bit counter. The lower two bytes are from hardware Timer 0.
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* The upper two bytes are maintained by software. At the maximum input clock
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* frequency of 6 MHz, it wraps around every 11.9 minutes, leaving the host
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* plenty of time to read it.
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*/
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uint8_t cntr[4];
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static void init_io(void)
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{
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/*
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@ -46,14 +58,47 @@ static void init_io(void)
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}
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static void setup_counter(void)
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{
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TCON = TR0; /* enable Timer 0 */
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TMOD = C_T0 | T0M0; /* clock from T0, mode 1: 16 bit counter */
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XBR1 |= T0E; /* route T0 to port */
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P0SKIP = 0x7f; /* assign T0 to P0_7 */
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}
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static void read_counter(void)
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{
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uint8_t th;
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th = TH0;
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while (1) {
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cntr[0] = TL0;
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if (th == TH0)
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break;
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th = TH0;
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}
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if (th < cntr[1]) {
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cntr[2]++;
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if (!cntr[2])
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cntr[3]++;
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}
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cntr[1] = th;
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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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setup_counter();
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// usb_init();
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// ep0_init();
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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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read_counter();
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usb_poll();
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}
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}
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68
cntr/fw/cntr/descr.c
Normal file
68
cntr/fw/cntr/descr.c
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@ -0,0 +1,68 @@
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/*
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* atspi/descr.c - USB descriptors
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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 "usb.h"
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#include "config.h"
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/*
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* Device descriptor
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*/
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const uint8_t device_descriptor[18] = {
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18, /* bLength */
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USB_DT_DEVICE, /* bDescriptorType */
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LE(0x200), /* bcdUSB */
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USB_CLASS_VENDOR_SPEC, /* bDeviceClass */
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0x00, /* bDeviceSubClass */
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0x00, /* bDeviceProtocol */
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EP0_SIZE, /* bMaxPacketSize */
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LE(USB_VENDOR), /* idVendor */
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LE(USB_PRODUCT), /* idProduct */
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LE(0x0001), /* bcdDevice */
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0, /* iManufacturer */
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0, /* iProduct */
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0, /* iSerialNumber */
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1 /* bNumConfigurations */
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};
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/*
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* Our configuration
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*
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* We're always bus-powered.
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*/
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const uint8_t config_descriptor[] = {
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9, /* bLength */
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USB_DT_CONFIG, /* bDescriptorType */
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LE(9+9), /* wTotalLength */
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1, /* bNumInterfaces */
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1, /* bConfigurationValue (> 0 !) */
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0, /* iConfiguration */
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USB_ATTR_BUS_POWERED, /* bmAttributes */
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15, /* bMaxPower */
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/* Interface #0 */
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9, /* bLength */
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USB_DT_INTERFACE, /* bDescriptorType */
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0, /* bInterfaceNumber */
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0, /* bAlternateSetting */
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0, /* bNumEndpoints */
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USB_CLASS_VENDOR_SPEC, /* bInterfaceClass */
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0, /* bInterfaceSubClass */
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0, /* bInterfaceProtocol */
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0, /* iInterface */
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};
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119
cntr/fw/cntr/ep0.c
Normal file
119
cntr/fw/cntr/ep0.c
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@ -0,0 +1,119 @@
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/*
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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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#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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extern uint8_t cntr[8];
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static const uint8_t id[] = { EP0CNTR_MAJOR, EP0CNTR_MINOR, HW_TYPE };
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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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unsigned 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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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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usb_send(&ep0, buf, 4, 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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@ -26,7 +26,8 @@
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*/
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#define PLATFORM_SETUP \
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LED_MODE |= 1 << LED_BIT;
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LED_MODE |= 1 << LED_BIT; \
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XBR1 = XBARE;
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/*
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