/* * This file is part of the Black Magic Debug project. * * Copyright (C) 2011 Black Sphere Technologies Ltd. * Written by Gareth McMullin * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /* This file implements the platform specific functions for the ST-Link * implementation. */ #include "general.h" #include "cdcacm.h" #include "usbuart.h" #include #include #include #include #include #include void platform_init(void) { uint32_t data; rcc_clock_setup_in_hse_8mhz_out_72mhz(); /* Enable peripherals */ rcc_periph_clock_enable(RCC_USB); rcc_periph_clock_enable(RCC_GPIOA); rcc_periph_clock_enable(RCC_GPIOB); rcc_periph_clock_enable(RCC_AFIO); rcc_periph_clock_enable(RCC_CRC); /* Unmap JTAG Pins so we can reuse as GPIO */ data = AFIO_MAPR; data &= ~AFIO_MAPR_SWJ_MASK; data |= AFIO_MAPR_SWJ_CFG_JTAG_OFF_SW_OFF; AFIO_MAPR = data; /* Setup JTAG GPIO ports */ gpio_set_mode(TMS_PORT, GPIO_MODE_OUTPUT_10_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, TMS_PIN); gpio_set_mode(TCK_PORT, GPIO_MODE_OUTPUT_10_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, TCK_PIN); gpio_set_mode(TDI_PORT, GPIO_MODE_OUTPUT_10_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, TDI_PIN); gpio_set_mode(TDO_PORT, GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, TDO_PIN); gpio_set(NRST_PORT,NRST_PIN); gpio_set_mode(NRST_PORT, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, NRST_PIN); gpio_set_mode(LED_PORT, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, LED_IDLE_RUN); /* Remap TIM2 TIM2_REMAP[1] * TIM2_CH1_ETR -> PA15 (TDI, set as output above) * TIM2_CH2 -> PB3 (TDO) */ data = AFIO_MAPR; data &= ~AFIO_MAPR_TIM2_REMAP_FULL_REMAP; data |= AFIO_MAPR_TIM2_REMAP_PARTIAL_REMAP1; AFIO_MAPR = data; SCB_VTOR = 0x2000; // Relocate interrupt vector table here platform_timing_init(); cdcacm_init(); usbuart_init(); } const char *platform_target_voltage(void) { return "unknown"; } void platform_request_boot(void) { /* Disconnect USB cable by resetting USB Device and pulling USB_DP low*/ rcc_periph_reset_pulse(RST_USB); rcc_periph_clock_enable(RCC_USB); rcc_periph_clock_enable(RCC_GPIOA); gpio_clear(GPIOA, GPIO12); gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_OPENDRAIN, GPIO12); /* Assert bootloader pin */ uint32_t crl = GPIOA_CRL; rcc_periph_clock_enable(RCC_GPIOA); /* Enable Pull on GPIOA1. We don't rely on the external pin * really pulled, but only on the value of the CNF register * changed from the reset value */ crl &= 0xffffff0f; crl |= 0x80; GPIOA_CRL = crl; }