diff options
Diffstat (limited to 'firmware/serial.h')
| -rw-r--r-- | firmware/serial.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/firmware/serial.h b/firmware/serial.h new file mode 100644 index 0000000..5066c43 --- /dev/null +++ b/firmware/serial.h @@ -0,0 +1,67 @@ +/* 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); +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; + uint32_t uptime_s, + uart_overruns, + frame_overruns, + invalid_frames; + int16_t vcc_mv, + temp_celsius; + } desc_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)) { uint32_t framebuf[32]; 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__*/ |