160 lines
4.4 KiB
C
160 lines
4.4 KiB
C
/*
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* This file is part of the Black Magic Debug project.
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*
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* Copyright (C) 2011 Black Sphere Technologies Ltd.
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* Written by Gareth McMullin <gareth@blacksphere.co.nz>
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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 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* This file implements the platform specific functions for the STM32
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* implementation.
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*/
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#include "general.h"
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#include "cdcacm.h"
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#include "usbuart.h"
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#include "morse.h"
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#include <libopencm3/stm32/rcc.h>
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#include <libopencm3/cm3/scb.h>
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#include <libopencm3/cm3/nvic.h>
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#include <libopencm3/stm32/exti.h>
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#include <libopencm3/stm32/usart.h>
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#include <libopencm3/stm32/syscfg.h>
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#include <libopencm3/usb/usbd.h>
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#include <libopencm3/cm3/systick.h>
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#include <libopencm3/cm3/cortex.h>
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#ifdef BLACKPILL
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#include <libopencm3/usb/dwc/otg_fs.h>
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#endif
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jmp_buf fatal_error_jmpbuf;
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extern char _ebss[];
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void platform_init(void)
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{
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volatile uint32_t *magic = (uint32_t *)_ebss;
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/* Enable GPIO peripherals */
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rcc_periph_clock_enable(RCC_GPIOA);
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rcc_periph_clock_enable(RCC_GPIOC);
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#ifdef BLACKPILL
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rcc_periph_clock_enable(RCC_GPIOB);
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#else
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rcc_periph_clock_enable(RCC_GPIOD);
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#endif
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/* Check the USER button*/
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if (gpio_get(GPIOA, GPIO0) ||
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((magic[0] == BOOTMAGIC0) && (magic[1] == BOOTMAGIC1)))
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{
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magic[0] = 0;
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magic[1] = 0;
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/* Assert blue LED as indicator we are in the bootloader */
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gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT,
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GPIO_PUPD_NONE, LED_BOOTLOADER);
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gpio_set(LED_PORT, LED_BOOTLOADER);
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/* Jump to the built in bootloader by mapping System flash.
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As we just come out of reset, no other deinit is needed!*/
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rcc_periph_clock_enable(RCC_SYSCFG);
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SYSCFG_MEMRM &= ~3;
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SYSCFG_MEMRM |= 1;
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scb_reset_core();
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}
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#ifdef BLACKPILL
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rcc_clock_setup_pll(&rcc_hse_25mhz_3v3[RCC_CLOCK_3V3_84MHZ]);
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#else
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rcc_clock_setup_pll(&rcc_hse_8mhz_3v3[RCC_CLOCK_3V3_168MHZ]);
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#endif
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/* Enable peripherals */
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rcc_periph_clock_enable(RCC_OTGFS);
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rcc_periph_clock_enable(RCC_CRC);
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/* Set up USB Pins and alternate function*/
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gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO9 | GPIO11 | GPIO12);
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gpio_set_af(GPIOA, GPIO_AF10, GPIO9 | GPIO10 | GPIO11 | GPIO12);
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#ifdef BLACKPILL
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GPIOA_OSPEEDR &= 0x3C00000C;
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GPIOA_OSPEEDR |= 0x28000008;
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#else
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GPIOC_OSPEEDR &= ~0xF30;
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GPIOC_OSPEEDR |= 0xA20;
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#endif
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gpio_mode_setup(JTAG_PORT, GPIO_MODE_OUTPUT,
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GPIO_PUPD_NONE,
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TCK_PIN | TDI_PIN);
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gpio_mode_setup(JTAG_PORT, GPIO_MODE_INPUT,
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GPIO_PUPD_NONE, TMS_PIN);
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gpio_set_output_options(JTAG_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_2MHZ,
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TCK_PIN | TDI_PIN | TMS_PIN);
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gpio_mode_setup(TDO_PORT, GPIO_MODE_INPUT,
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GPIO_PUPD_NONE,
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TDO_PIN);
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gpio_set_output_options(TDO_PORT, GPIO_OTYPE_PP, GPIO_OSPEED_2MHZ,
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TDO_PIN | TMS_PIN);
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gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT,
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GPIO_PUPD_NONE,
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LED_IDLE_RUN | LED_ERROR | LED_BOOTLOADER);
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gpio_mode_setup(LED_PORT_UART, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, LED_UART);
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#ifdef PLATFORM_HAS_POWER_SWITCH
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gpio_set(PWR_BR_PORT, PWR_BR_PIN);
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gpio_mode_setup(PWR_BR_PORT, GPIO_MODE_OUTPUT,
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GPIO_PUPD_NONE,
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PWR_BR_PIN);
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#endif
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platform_timing_init();
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usbuart_init();
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cdcacm_init();
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#ifdef BLACKPILL
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// https://github.com/libopencm3/libopencm3/pull/1256#issuecomment-779424001
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OTG_FS_GCCFG |= OTG_GCCFG_NOVBUSSENS | OTG_GCCFG_PWRDWN;
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OTG_FS_GCCFG &= ~(OTG_GCCFG_VBUSBSEN | OTG_GCCFG_VBUSASEN);
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#endif
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}
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void platform_srst_set_val(bool assert) { (void)assert; }
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bool platform_srst_get_val(void) { return false; }
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const char *platform_target_voltage(void)
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{
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return NULL;
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}
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void platform_request_boot(void)
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{
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uint32_t *magic = (uint32_t *)&_ebss;
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magic[0] = BOOTMAGIC0;
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magic[1] = BOOTMAGIC1;
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scb_reset_system();
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}
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#ifdef PLATFORM_HAS_POWER_SWITCH
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bool platform_target_get_power(void)
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{
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return !gpio_get(PWR_BR_PORT, PWR_BR_PIN);
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}
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void platform_target_set_power(bool power)
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{
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gpio_set_val(PWR_BR_PORT, PWR_BR_PIN, !power);
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}
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#endif |