From 1d3861ef93f8423176c6010ab606abdab00a7cbd Mon Sep 17 00:00:00 2001 From: bnewbold Date: Wed, 31 Mar 2010 08:52:45 +0800 Subject: Major hierarchy reorganization; see README. copy-to-ide and Makefile updated to conform; .gitignore added; LICENSE added --- libmaple/util.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 libmaple/util.c (limited to 'libmaple/util.c') diff --git a/libmaple/util.c b/libmaple/util.c new file mode 100644 index 0000000..d323611 --- /dev/null +++ b/libmaple/util.c @@ -0,0 +1,103 @@ +/* ***************************************************************************** + * 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 . + * + * Created: 12/18/09 02:38:44 + * Copyright (c) 2009 Perry L. Hung. All rights reserved. + * + * ****************************************************************************/ + +/** + * @file util.h + * + * @brief Utility procedures for debugging, mostly an error LED fade and + * messages dumped over a uart for failed asserts. + */ + +#include "libmaple.h" +#include "usart.h" +#include "gpio.h" +#include "nvic.h" +#include "adc.h" +#include "timers.h" + +#define ERROR_LED_PORT GPIOA_BASE +#define ERROR_LED_PIN 5 +#define ERROR_USART_NUM 2 +#define ERROR_USART_BAUD 9600 +#define ERROR_TX_PIN 2 +#define ERROR_TX_PORT GPIOA_BASE + +/* Error assert + fade */ +void _fail(const char* file, int line, const char* exp) { + int32_t slope = 1; + int32_t CC = 0x0000; + int32_t TOP_CNT = 0x02FF; + int32_t i = 0; + + /* Turn off interrupts */ + nvic_disable_interrupts(); + + /* Turn off timers */ + timers_disable(); + + /* Turn off ADC */ + adc_disable(); + + /* Turn off all usarts */ + usart_disable(1); + usart_disable(2); + usart_disable(3); + + /* Initialize the error usart */ + gpio_set_mode(ERROR_TX_PORT, ERROR_TX_PIN, GPIO_MODE_AF_OUTPUT_PP); + usart_init(ERROR_USART_NUM, ERROR_USART_BAUD); + + /* Print failed assert message */ + usart_putstr(ERROR_USART_NUM, "ERROR: FAILED ASSERT("); + usart_putstr(ERROR_USART_NUM, exp); + usart_putstr(ERROR_USART_NUM, "): "); + usart_putstr(ERROR_USART_NUM, file); + usart_putstr(ERROR_USART_NUM, ": "); + usart_putudec(ERROR_USART_NUM, line); + usart_putc(ERROR_USART_NUM, '\n'); + + /* Turn on the error LED */ + gpio_set_mode(ERROR_LED_PORT, ERROR_LED_PIN, GPIO_MODE_OUTPUT_PP); + + /* Turn the USB interrupt back on so the bootloader keeps on functioning */ + nvic_enable_interrupt(NVIC_INT_USBHP); + nvic_enable_interrupt(NVIC_INT_USBLP); + + /* Error fade */ + while (1) { + if (CC == TOP_CNT) { + slope = -1; + } else if (CC == 0) { + slope = 1; + } + + if (i == TOP_CNT) { + CC += slope; + i = 0; + } + + if (i < CC) { + gpio_write_bit(ERROR_LED_PORT, ERROR_LED_PIN, 1); + } else { + gpio_write_bit(ERROR_LED_PORT, ERROR_LED_PIN, 0); + } + i++; + } +} + -- cgit v1.2.3