lora-car/libopencm3/tests/gadget-zero/main-stm32l053disco.c
Arti Zirk 054740c5de git subrepo clone https://github.com/libopencm3/libopencm3.git
subrepo:
  subdir:   "libopencm3"
  merged:   "88e91c9a7cce"
upstream:
  origin:   "https://github.com/libopencm3/libopencm3.git"
  branch:   "master"
  commit:   "88e91c9a7cce"
git-subrepo:
  version:  "0.4.3"
  origin:   "???"
  commit:   "???"
2023-01-21 21:54:42 +02:00

91 lines
2.5 KiB
C

/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2015 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/crs.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/syscfg.h>
#include <stdio.h>
#include "usb-gadget0.h"
/* no trace on cm0 #define ER_DEBUG */
#ifdef ER_DEBUG
#define ER_DPRINTF(fmt, ...) \
do { printf(fmt, ## __VA_ARGS__); } while (0)
#else
#define ER_DPRINTF(fmt, ...) \
do { } while (0)
#endif
#include "trace.h"
void trace_send_blocking8(int stimulus_port, char c)
{
(void)stimulus_port;
(void)c;
}
int main(void)
{
/* LED for boot progress */
rcc_periph_clock_enable(RCC_GPIOA);
gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO5);
gpio_set(GPIOA, GPIO5);
/* PLL from HSI16, just to exercise that code */
struct rcc_clock_scale myclock = {
.ahb_frequency = 32e6,
.apb1_frequency = 32e6,
.apb2_frequency = 32e6,
.flash_waitstates = 1,
.pll_source = RCC_CFGR_PLLSRC_HSI16_CLK, /* not even sure there's hse on l053 disco */
/* .msi_range doesn't matter */
.pll_mul = RCC_CFGR_PLLMUL_MUL4,
.pll_div = RCC_CFGR_PLLDIV_DIV2,
.hpre = RCC_CFGR_HPRE_NODIV,
.ppre1 = RCC_CFGR_PPRE1_NODIV,
.ppre2 = RCC_CFGR_PPRE2_NODIV,
};
rcc_clock_setup_pll(&myclock);
/* HSI48 needs the vrefint turned on */
rcc_periph_clock_enable(RCC_SYSCFG);
SYSCFG_CFGR3 |= SYSCFG_CFGR3_ENREF_HSI48 | SYSCFG_CFGR3_EN_VREFINT;
while (!(SYSCFG_CFGR3 & SYSCFG_CFGR3_REF_HSI48_RDYF));
/* For USB, but can't use HSI48 as a sysclock on L0 */
crs_autotrim_usb_enable();
rcc_set_hsi48_source_rc48();
rcc_osc_on(RCC_HSI48);
rcc_wait_for_osc_ready(RCC_HSI48);
usbd_device *usbd_dev = gadget0_init(&st_usbfs_v2_usb_driver,
"stm32l053disco");
ER_DPRINTF("bootup complete\n");
gpio_clear(GPIOA, GPIO5);
while (1) {
gadget0_run(usbd_dev);
}
}