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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"
/* 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);
/* 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;
uint8_t nbits;
uint8_t channel_spec;
uint8_t color_spec;
uint16_t nchannels;
uint32_t uptime_s,
uart_overruns,
frame_overruns,
invalid_frames;
int16_t vcc_mv,
temp_celsius;
} desc_reply;
struct __attribute__((packed)) {
uint32_t mac;
uint16_t device_type;
} device_type_reply;
uint8_t byte_data[0];
};
union rx_buf_union {
/* Right-aligned integer raw channel brightness values like so:
*
* bit index 31 ... 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
* | (MSB) serial data put *here* (LSB) |
* |<-utterly ignored->| |<-----------------MAX_BITS------------------>|
* |<----------------NBITS---------------->| |<>|--ignored
* | (MSB) brightness data (LSB) | |<>|--ignored
*/
struct __attribute__((packed)) { uint16_t framebuf[NCHANNELS]; uint8_t end[0]; } set_fb_rq;
uint8_t byte_data[0];
uint32_t mac_data;
};
extern volatile union rx_buf_union rx_buf;
extern volatile uint8_t framebuf_out_of_sync;
#endif/*__SERIAL_H__*/
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