/* 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 .
*
*/
/* Copyright (c) 2016 King Kévin */
/* standard libraries */
#include // standard integer types
#include // standard I/O facilities
#include // standard utilities
#include // standard streams
#include // error number utilities
#include // stting utilities
/* STM32 (including CM3) libraries */
#include // real-time control clock library
#include // general purpose input output library
#include // vector table definition
#include // Cortex M3 utilities
#include
#include
/* own libraries */
#include "global.h" // board definitions
#include "usart.h" // USART utilities
#include "usb_cdcacm.h" // USB CDC ACM utilities
#include "vfd.h" // VFD driver
/* default output (i.e. for printf) */
int _write(int file, char *ptr, int len)
{
int i;
if (file == STDOUT_FILENO || file == STDERR_FILENO) {
for (i = 0; i < len; i++) {
if (ptr[i] == '\n') { // add carrier return before line feed. this is recommended for most UART terminals
usart_putchar_nonblocking('\r'); // a second line feed doesn't break the display
cdcacm_putchar('\r'); // a second line feed doesn't break the display
}
usart_putchar_nonblocking(ptr[i]); // send byte over USART
cdcacm_putchar(ptr[i]); // send byte over USB
}
return i;
}
errno = EIO;
return -1;
}
static void gpio_setup(void)
{
rcc_periph_clock_enable(LED_RCC); //enable clock for LED
gpio_set_mode(LED_PORT, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, LED_PIN); // set LED pin to 'output push-pull'
}
int main(void)
{
SCB_VTOR = (uint32_t) 0x08002000; // relocate vector table because of the bootloader
rcc_clock_setup_in_hse_8mhz_out_72mhz(); // use 8 MHz high speed external clock to generate 72 MHz internal clock
gpio_setup(); // setup main inputs/outputs
usart_setup(); // setup USART (for printing)
cdcacm_setup(); // setup USB CDC ACM (for printing)
vfd_setup(); // setup VFD
setbuf(stdout, NULL); // set standard out buffer to NULL to immediately print
setbuf(stderr, NULL); // set standard error buffer to NULL to immediately print
printf("welcome to the STM32F1 CuVoodoo vacuum fluorescent display driver\n");
printf("testing VFD\n");
vfd_on(); // switch on VFD
vfd_test(); // show all anodes
for (uint32_t i = 0; i < 0x800000; i++) { // show for a bit of time
__asm__("nop");
}
vfd_clear(); // clear all data
printf("scrolling message\n");
const char* message = " follow the white rabbit "; // message to display (shifted by left-padded by VFD_MATRIX (12), right padded by VFD_MATRIX-VFD_DIGITS (2))
for (uint8_t i=0; i0) { // only on new newline
vfd_clear(); // clear display
vfd_place = 0; // restart from beginning
// show previous line on digits (and clear it)
for (uint8_t i=0; i