tests: gadget0: add stm32f3-disco
Another readily available board with a user USB port, and this one lets you test the st usbfs peripheral on a device with trace facilities.
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Karl Palsson
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##
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## This file is part of the libopencm3 project.
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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BOARD = stm32f3-disco
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PROJECT = usb-gadget0-$(BOARD)
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BUILD_DIR = bin-$(BOARD)
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SHARED_DIR = ../shared
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CFILES = main-$(BOARD).c
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CFILES += usb-gadget0.c trace.c trace_stdio.c
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CFILES += delay.c
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VPATH += $(SHARED_DIR)
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INCLUDES += $(patsubst %,-I%, . $(SHARED_DIR))
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OPENCM3_DIR=../..
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### This section can go to an arch shared rules eventually...
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LDSCRIPT = ../../lib/stm32/f3/stm32f303xc.ld
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OPENCM3_LIB = opencm3_stm32f3
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OPENCM3_DEFS = -DSTM32F3
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FP_FLAGS ?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
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ARCH_FLAGS = -mthumb -mcpu=cortex-m4 $(FP_FLAGS)
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#OOCD_INTERFACE = stlink-v2
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#OOCD_TARGET = stm32f3x
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OOCD_FILE = openocd.stm32f3-disco.cfg
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include ../rules.mk
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/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2015 Karl Palsson <karlp@tweak.net.au>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* "generic" could be any L1 board, but this file is pre-configured for the
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* libopencm3-tests "hw1" board, with an stm32l151c8-A part.
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*/
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#include <libopencm3/cm3/nvic.h>
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#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/stm32/flash.h>
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#include <libopencm3/stm32/rcc.h>
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#include <libopencm3/stm32/syscfg.h>
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#include <stdio.h>
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#include "usb-gadget0.h"
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#define ER_DEBUG
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#ifdef ER_DEBUG
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#define ER_DPRINTF(fmt, ...) \
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do { printf(fmt, ## __VA_ARGS__); } while (0)
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#else
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#define ER_DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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const struct rcc_clock_scale this_clock_config = {
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/* 72MHZ from 8MHZ external clock from stlink MCO */
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.pllsrc = RCC_CFGR_PLLSRC_HSE_PREDIV,
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.pllmul = RCC_CFGR_PLLMUL_MUL9,
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.plldiv = RCC_CFGR2_PREDIV_NODIV,
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.usbdiv1 = false,
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.flash_waitstates = 2,
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.hpre = RCC_CFGR_HPRE_DIV_NONE,
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.ppre1 = RCC_CFGR_PPRE1_DIV_2,
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.ppre2 = RCC_CFGR_PPRE2_DIV_NONE,
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.ahb_frequency = 72e6,
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.apb1_frequency = 32e6,
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.apb2_frequency = 72e6,
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};
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int main(void)
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{
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rcc_periph_clock_enable(RCC_GPIOE);
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gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO11|GPIO12);
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gpio_set(GPIOE, GPIO12);
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rcc_clock_setup_pll(&this_clock_config);
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rcc_periph_clock_enable(RCC_GPIOA);
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/*
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* Vile hack to reenumerate, physically _drag_ d+ low.
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* do NOT do this if you're board has proper usb pull up control!
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* (need at least 2.5us to trigger usb disconnect)
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*/
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gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO12);
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gpio_clear(GPIOA, GPIO12);
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for (unsigned int i = 0; i < 800000; i++) {
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__asm__("nop");
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}
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/* now return PA11/PA12 to usb AF */
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gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO11|GPIO12);
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gpio_set_af(GPIOA, GPIO_AF14, GPIO11|GPIO12);
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usbd_device *usbd_dev = gadget0_init(&st_usbfs_v1_usb_driver,
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"stm32f3-disco");
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ER_DPRINTF("bootup complete\n");
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gpio_clear(GPIOE, GPIO12);
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static int i = 0;
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while (1) {
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gpio_toggle(GPIOE, GPIO12);
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gadget0_run(usbd_dev);
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ER_DPRINTF("loop %d\n", i++);
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}
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}
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@ -0,0 +1,13 @@
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source [find interface/stlink-v2.cfg]
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set WORKAREASIZE 0x4000
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source [find target/stm32f3x.cfg]
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# serial of my f3 disco board.
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hla_serial "S?n\x06gePQ6G%g"
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tpiu config internal swodump.stm32f3-disco.log uart off 72000000
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# Uncomment to reset on connect, for grabbing under WFI et al
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reset_config srst_only srst_nogate
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# reset_config srst_only srst_nogate connect_assert_srst
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