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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung (from libmaple/util.c).
* Copyright (c) 2012 LeafLabs, LLC.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/*
* STM32F1 implementations for libmaple/util.c hooks
*
* These need more love and attention before being made public API
* (this includes being easily overridable by user code).
*/
#include <libmaple/nvic.h>
#include <libmaple/gpio.h>
#include <libmaple/stm32.h>
#include <libmaple/timer.h>
#include <libmaple/adc.h>
#include <libmaple/usart.h>
/* Failed ASSERT()s send out a message using this USART config. */
#ifndef ERROR_USART
#define ERROR_USART USART2
#define ERROR_USART_BAUD 9600
#define ERROR_TX_PORT GPIOA
#define ERROR_TX_PIN 2
#endif
/*
* Disables all peripheral interrupts except USB (when available),
* turns off commonly-used peripherals. Called by __error() with
* global interrupts disabled.
*/
void __lm_error(void) {
/* Turn off peripheral interrupts */
nvic_irq_disable_all();
/* Turn off timers */
timer_disable_all();
/* Turn off ADC */
adc_disable_all();
/* Turn off all USARTs */
usart_disable_all();
#if STM32_HAVE_USB
/* Turn the USB interrupt back on so the bootloader keeps on functioning */
nvic_irq_enable(NVIC_USB_HP_CAN_TX);
nvic_irq_enable(NVIC_USB_LP_CAN_RX0);
#endif
}
/*
* Enable the error USART for writing.
*/
usart_dev* __lm_enable_error_usart() {
gpio_set_mode(ERROR_TX_PORT, ERROR_TX_PIN, GPIO_AF_OUTPUT_PP);
usart_init(ERROR_USART);
usart_set_baud_rate(ERROR_USART, USART_USE_PCLK, ERROR_USART_BAUD);
return ERROR_USART;
}
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