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/* Megumin LED display firmware
* Copyright (C) 2018 Sebastian Götte <code@jaseg.net>
*
* 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/>.
*/
#ifndef __SERIAL_H__
#define __SERIAL_H__
#include "global.h"
#include "display.h"
/* High-level stuff */
void serial_init(void);
void send_status_reply(void);
/* Internal low-level stuff */
void tx_char(uint8_t c);
void send_frame_formatted(uint8_t *buf, int len);
volatile uint8_t *packet_received(int len);
/* Error counters for debugging */
extern unsigned int uart_overruns;
extern unsigned int frame_overruns;
extern unsigned int invalid_frames;
union tx_buf_union {
struct __attribute__((packed)) {
uint8_t firmware_version,
hardware_version,
digit_rows,
digit_cols;
uint32_t uptime_s,
framerate_millifps,
uart_overruns,
frame_overruns,
invalid_frames;
int16_t vcc_mv,
temp_celsius;
uint8_t nbits;
} desc_reply;
uint8_t byte_data[0];
};
union rx_buf_union {
struct __attribute__((packed)) { struct framebuf fb; uint8_t end[0]; } set_fb_rq;
struct __attribute__((packed)) { uint8_t nbits; uint8_t end[0]; } set_nbits_rq;
uint8_t byte_data[0];
uint32_t mac_data;
};
extern volatile union rx_buf_union rx_buf;
#endif/*__SERIAL_H__*/
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