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/*
 * This file is part of the Black Magic Debug project.
 *
 * Copyright (C) 2011  Black Sphere Technologies Ltd.
 * Written by Gareth McMullin <gareth@blacksphere.co.nz>
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

/* This file implements the platform specific functions for the STM32
 * implementation.
 */
#ifndef __PLATFORM_H
#define __PLATFORM_H

#include <libopencm3/stm32/f1/gpio.h>

#include <setjmp.h>
#include <alloca.h>

#include "gdb_packet.h"

#define INLINE_GPIO
#define CDCACM_PACKET_SIZE 	64
#define PLATFORM_HAS_TRACESWO

/* Important pin mappings for STM32 implementation:
 *
 * LED0 = 	PB2	(Yellow LED : Running)
 * LED1 = 	PB10	(Yellow LED : Idle)
 * LED2 = 	PB11	(Red LED    : Error)
 *
 * TPWR = 	RB0 (input) -- analogue on mini design ADC1, ch8
 * nTRST = 	PB1
 * SRST_OUT = 	PA2
 * TDI = 	PA3
 * TMS = 	PA4 (input for SWDP)
 * TCK = 	PA5
 * TDO = 	PA6 (input)
 * nSRST = 	PA7 (input)
 *
 * USB cable pull-up: PA8
 * USB VBUS detect:  PB13 -- New on mini design.  
 *                           Enable pull up for compatibility.
 * Force DFU mode button: PB12
 */

/* Hardware definitions... */
#define JTAG_PORT 	GPIOA
#define TDI_PIN		GPIO3
#define TMS_PIN		GPIO4
#define TCK_PIN		GPIO5
#define TDO_PIN		GPIO6

#define SWDP_PORT 	JTAG_PORT
#define SWDIO_PIN	TMS_PIN
#define SWCLK_PIN	TCK_PIN

#define USB_PU_PORT	GPIOA
#define USB_PU_PIN	GPIO8

#define USB_VBUS_PORT	GPIOB
#define USB_VBUS_PIN	GPIO13
#define USB_VBUS_IRQ	NVIC_EXTI15_10_IRQ

#define LED_PORT	GPIOB
#define LED_UART	GPIO2
#define LED_IDLE_RUN	GPIO10
#define LED_ERROR	GPIO11

/* Interrupt priorities.  Low numbers are high priority.
 * For now USART1 preempts USB which may spin while buffer is drained.
 * TIM3 is used for traceswo capture and must be highest priority. 
 */
#define IRQ_PRI_USB		(2 << 4)
#define IRQ_PRI_USART1		(1 << 4)
#define IRQ_PRI_USB_VBUS	(14 << 4)
#define IRQ_PRI_TIM3		(0 << 4)

#define DEBUG(...)

extern uint8_t running_status;
extern volatile uint32_t timeout_counter;

extern jmp_buf fatal_error_jmpbuf;

extern const char *morse_msg;

#define gpio_set_val(port, pin, val) do {	\
	if(val)					\
		gpio_set((port), (pin));	\
	else					\
		gpio_clear((port), (pin));	\
} while(0)

#define SET_RUN_STATE(state)	{running_status = (state);}
#define SET_IDLE_STATE(state)	{gpio_set_val(LED_PORT, LED_IDLE_RUN, state);}
#define SET_ERROR_STATE(state)	{gpio_set_val(LED_PORT, LED_ERROR, state);}

#define PLATFORM_SET_FATAL_ERROR_RECOVERY()	{setjmp(fatal_error_jmpbuf);}
#define PLATFORM_FATAL_ERROR(error)	{ 		\
	if(running_status) gdb_putpacketz("X1D");	\
		else gdb_putpacketz("EFF");		\
	running_status = 0;				\
	TARGET_LIST_FREE();				\
	cur_target = last_target = NULL;		\
	morse("TARGET LOST.", 1);			\
	longjmp(fatal_error_jmpbuf, (error));		\
}

int platform_init(void);
void morse(const char *msg, char repeat);
const char *platform_target_voltage(void);
int platform_hwversion(void);

/* <cdcacm.c> */
void cdcacm_init(void);
/* Returns current usb configuration, or 0 if not configured. */
int cdcacm_get_config(void);
int cdcacm_get_dtr(void);

/* <platform.h> */
void uart_usb_buf_drain(uint8_t ep);

/* Use newlib provided integer only stdio functions */
#define sscanf siscanf
#define sprintf siprintf
#define vasprintf vasiprintf

#ifdef INLINE_GPIO
static inline void _gpio_set(u32 gpioport, u16 gpios)
{
	GPIO_BSRR(gpioport) = gpios;
}
#define gpio_set _gpio_set

static inline void _gpio_clear(u32 gpioport, u16 gpios)
{
	GPIO_BRR(gpioport) = gpios;
}
#define gpio_clear _gpio_clear

static inline u16 _gpio_get(u32 gpioport, u16 gpios)
{
	return (u16)GPIO_IDR(gpioport) & gpios;
}
#define gpio_get _gpio_get
#endif

#endif