143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/*
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* This file is part of the Black Magic Debug project.
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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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#include "general.h"
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#include "gdb_if.h"
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#include "cdcacm.h"
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#include "usbuart.h"
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#include <libopencm3/lm4f/rcc.h>
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#include <libopencm3/lm4f/nvic.h>
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#include <libopencm3/lm4f/uart.h>
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#include <libopencm3/cm3/systick.h>
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#include <libopencm3/lm4f/usb.h>
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#define SYSTICKHZ 100
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#define SYSTICKMS (1000 / SYSTICKHZ)
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#define PLL_DIV_80MHZ 5
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#define PLL_DIV_25MHZ 16
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extern void trace_tick(void);
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volatile platform_timeout * volatile head_timeout;
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uint8_t running_status;
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static volatile uint32_t time_ms;
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void sys_tick_handler(void)
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{
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trace_tick();
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time_ms += 10;
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}
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uint32_t platform_time_ms(void)
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{
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return time_ms;
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}
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void
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platform_init(void)
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{
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int i;
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for(i=0; i<1000000; i++);
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rcc_sysclk_config(OSCSRC_MOSC, XTAL_16M, PLL_DIV_80MHZ);
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// Enable all JTAG ports and set pins to output
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periph_clock_enable(RCC_GPIOA);
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periph_clock_enable(RCC_GPIOB);
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gpio_enable_ahb_aperture();
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gpio_mode_setup(TMS_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, TMS_PIN);
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gpio_mode_setup(TCK_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TCK_PIN);
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gpio_mode_setup(TDI_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, TDI_PIN);
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gpio_mode_setup(TDO_PORT, GPIO_MODE_INPUT, GPIO_PUPD_NONE, TDO_PIN);
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gpio_mode_setup(SRST_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, SRST_PIN);
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gpio_set_output_config(SRST_PORT, GPIO_OTYPE_OD, GPIO_DRIVE_2MA, SRST_PIN);
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gpio_set(SRST_PORT, SRST_PIN);
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systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
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systick_set_reload(rcc_get_system_clock_frequency() / (SYSTICKHZ * 8));
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systick_interrupt_enable();
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systick_counter_enable();
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nvic_enable_irq(NVIC_SYSTICK_IRQ);
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nvic_enable_irq(NVIC_UART0_IRQ);
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periph_clock_enable(RCC_GPIOD);
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__asm__("nop"); __asm__("nop"); __asm__("nop");
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gpio_mode_setup(GPIOD_BASE, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO4|GPIO5);
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usbuart_init();
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cdcacm_init();
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usb_enable_interrupts(USB_INT_RESET | USB_INT_DISCON |
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USB_INT_RESUME | USB_INT_SUSPEND,
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0xff, 0xff);
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}
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void platform_srst_set_val(bool assert)
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{
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volatile int i;
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if (assert) {
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gpio_clear(SRST_PORT, SRST_PIN);
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for(i = 0; i < 10000; i++) asm("nop");
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} else {
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gpio_set(SRST_PORT, SRST_PIN);
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}
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}
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bool platform_srst_get_val(void)
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{
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return gpio_get(SRST_PORT, SRST_PIN) == 0;
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}
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void platform_delay(uint32_t ms)
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{
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platform_timeout timeout;
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platform_timeout_set(&timeout, ms);
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while (!platform_timeout_is_expired(&timeout));
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}
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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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char *serialno_read(char *s)
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{
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/* FIXME: Store a unique serial number somewhere and retreive here */
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uint32_t unique_id = 1;
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int i;
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/* Fetch serial number from chip's unique ID */
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for(i = 0; i < 8; i++) {
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s[7-i] = ((unique_id >> (4*i)) & 0xF) + '0';
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}
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for(i = 0; i < 8; i++)
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if(s[i] > '9')
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s[i] += 'A' - '9' - 1;
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s[8] = 0;
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return s;
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}
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void platform_request_boot(void)
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{
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}
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