Richard Eoin Meadows 63bce97cbd PLATFORM_FATAL_ERRORs are now caught even when they happen in the
initial JTAG scan that occours during platform_init.

Previously any fatal errors that occoured during this scan caused a
hardfault.
2014-05-28 12:10:26 +01:00

216 lines
5.4 KiB
C

/*
* 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.
*/
#include "platform.h"
#include <libopencm3/stm32/f4/rcc.h>
#include <libopencm3/cm3/systick.h>
#include <libopencm3/cm3/scb.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/exti.h>
#include <libopencm3/stm32/usart.h>
#include <libopencm3/stm32/syscfg.h>
#include <libopencm3/usb/usbd.h>
#include "jtag_scan.h"
#include <usbuart.h>
#include <ctype.h>
uint8_t running_status;
volatile uint32_t timeout_counter;
jmp_buf fatal_error_jmpbuf;
static void morse_update(void);
int platform_init(void)
{
/* Check the USER button*/
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPAEN);
if(gpio_get(GPIOA, GPIO0)) {
assert_boot_pin();
scb_reset_core();
}
rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_48MHZ]);
/* Enable peripherals */
rcc_peripheral_enable_clock(&RCC_AHB2ENR, RCC_AHB2ENR_OTGFSEN);
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPCEN);
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN);
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_CRCEN);
/* Set up USB Pins and alternate function*/
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE,
GPIO9 | GPIO11 | GPIO12);
gpio_set_af(GPIOA, GPIO_AF10, GPIO9 | GPIO11 | GPIO12);
GPIOC_OSPEEDR &=~0xF30;
GPIOC_OSPEEDR |= 0xA20;
gpio_mode_setup(JTAG_PORT, GPIO_MODE_OUTPUT,
GPIO_PUPD_NONE,
TMS_PIN | TCK_PIN | TDI_PIN);
gpio_mode_setup(TDO_PORT, GPIO_MODE_INPUT,
GPIO_PUPD_NONE,
TDO_PIN);
gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT,
GPIO_PUPD_NONE,
LED_UART | LED_IDLE_RUN | LED_ERROR | LED_BOOTLOADER);
/* Setup heartbeat timer */
systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
systick_set_reload(168000000/(10*8)); /* Interrupt us at 10 Hz */
SCB_SHPR(11) &= ~((15 << 4) & 0xff);
SCB_SHPR(11) |= ((14 << 4) & 0xff);
systick_interrupt_enable();
systick_counter_enable();
usbuart_init();
cdcacm_init();
// Set recovery point
if (setjmp(fatal_error_jmpbuf)) {
return 0; // Do nothing on failure
}
jtag_scan(NULL);
return 0;
}
void platform_delay(uint32_t delay)
{
timeout_counter = delay;
while(timeout_counter);
}
void sys_tick_handler(void)
{
if(running_status)
gpio_toggle(LED_PORT, LED_IDLE_RUN);
if(timeout_counter)
timeout_counter--;
morse_update();
}
/* Morse code patterns and lengths */
static const struct {
uint16_t code;
uint8_t bits;
} morse_letter[] = {
{ 0b00011101, 8}, // 'A' .-
{ 0b000101010111, 12}, // 'B' -...
{ 0b00010111010111, 14}, // 'C' -.-.
{ 0b0001010111, 10}, // 'D' -..
{ 0b0001, 4}, // 'E' .
{ 0b000101110101, 12}, // 'F' ..-.
{ 0b000101110111, 12}, // 'G' --.
{ 0b0001010101, 10}, // 'H' ....
{ 0b000101, 6}, // 'I' ..
{0b0001110111011101, 16}, // 'J' .---
{ 0b000111010111, 12}, // 'K' -.-
{ 0b000101011101, 12}, // 'L' .-..
{ 0b0001110111, 10}, // 'M' --
{ 0b00010111, 8}, // 'N' -.
{ 0b00011101110111, 14}, // 'O' ---
{ 0b00010111011101, 14}, // 'P' .--.
{0b0001110101110111, 16}, // 'Q' --.-
{ 0b0001011101, 10}, // 'R' .-.
{ 0b00010101, 8}, // 'S' ...
{ 0b000111, 6}, // 'T' -
{ 0b0001110101, 10}, // 'U' ..-
{ 0b000111010101, 12}, // 'V' ...-
{ 0b000111011101, 12}, // 'W' .--
{ 0b00011101010111, 14}, // 'X' -..-
{0b0001110111010111, 16}, // 'Y' -.--
{ 0b00010101110111, 14}, // 'Z' --..
};
const char *morse_msg;
static const char * volatile morse_ptr;
static char morse_repeat;
void morse(const char *msg, char repeat)
{
morse_msg = morse_ptr = msg;
morse_repeat = repeat;
SET_ERROR_STATE(0);
}
static void morse_update(void)
{
static uint16_t code;
static uint8_t bits;
if(!morse_ptr) return;
if(!bits) {
char c = *morse_ptr++;
if(!c) {
if(morse_repeat) {
morse_ptr = morse_msg;
c = *morse_ptr++;
} else {
morse_ptr = 0;
return;
}
}
if((c >= 'A') && (c <= 'Z')) {
c -= 'A';
code = morse_letter[c].code;
bits = morse_letter[c].bits;
} else {
code = 0; bits = 4;
}
}
SET_ERROR_STATE(code & 1);
code >>= 1; bits--;
}
const char *platform_target_voltage(void)
{
return "ABSENT!";
}
void assert_boot_pin(void)
{
/* Assert blue LED as indicator we are in the bootloader */
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN);
gpio_mode_setup(LED_PORT, GPIO_MODE_OUTPUT,
GPIO_PUPD_NONE, LED_BOOTLOADER);
gpio_set(LED_PORT, LED_BOOTLOADER);
/* Jump to the built in bootloader by mapping System flash */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_SYSCFGEN);
SYSCFG_MEMRM &= ~3;
SYSCFG_MEMRM |= 1;
}