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/* *****************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* 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.
* ****************************************************************************/
/**
* @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"
/* Error assert + fade */
void _fail(const char* file, int line, const char* exp) {
int32 slope = 1;
uint32 CC = 0x0000;
uint32 TOP_CNT = 0x02FF;
uint32 i = 0;
/* Turn off interrupts */
nvic_disable_interrupts();
/* Turn off timers */
timer_disable_all();
/* Turn off ADC */
adc_disable();
/* Turn off all usarts */
usart_disable_all();
/* 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++;
}
}
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