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/*
Copyright 2019 @foostan
Copyright 2020 Drashna Jaelre <@drashna>
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 2 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/>.
*/
#ifdef USE_SERIAL
#ifdef SERIAL_USE_MULTI_TRANSACTION
/* --- USE flexible API (using multi-type transaction function) --- */
#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
#include "split_scomm.h"
#include "serial.h"
#ifdef CONSOLE_ENABLE
#include "debug.h"
#endif
uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
uint8_t volatile status_com = 0;
uint8_t volatile status1 = 0;
uint8_t slave_buffer_change_count = 0;
uint8_t s_change_old = 0xff;
uint8_t s_change_new = 0xff;
SSTD_t transactions[] = {
#define GET_SLAVE_STATUS 0
/* master buffer not changed, only recive slave_buffer_change_count */
{ (uint8_t *)&status_com,
0, NULL,
sizeof(slave_buffer_change_count), &slave_buffer_change_count,
},
#define PUT_MASTER_GET_SLAVE_STATUS 1
/* master buffer changed need send, and recive slave_buffer_change_count */
{ (uint8_t *)&status_com,
sizeof(serial_master_buffer), (uint8_t *)serial_master_buffer,
sizeof(slave_buffer_change_count), &slave_buffer_change_count,
},
#define GET_SLAVE_BUFFER 2
/* recive serial_slave_buffer */
{ (uint8_t *)&status1,
0, NULL,
sizeof(serial_slave_buffer), (uint8_t *)serial_slave_buffer
}
};
void serial_master_init(void)
{
soft_serial_initiator_init(transactions, TID_LIMIT(transactions));
}
void serial_slave_init(void)
{
soft_serial_target_init(transactions, TID_LIMIT(transactions));
}
// 0 => no error
// 1 => slave did not respond
// 2 => checksum error
int serial_update_buffers(int master_update)
{
int status, smatstatus;
static int need_retry = 0;
if( s_change_old != s_change_new ) {
smatstatus = soft_serial_transaction(GET_SLAVE_BUFFER);
if( smatstatus == TRANSACTION_END ) {
s_change_old = s_change_new;
#ifdef CONSOLE_ENABLE
if (debug_matrix) {
uprintf("slave matrix = %b %b %b %b\n",
serial_slave_buffer[0], serial_slave_buffer[1],
serial_slave_buffer[2], serial_slave_buffer[3]);
}
#endif
}
} else {
// serial_slave_buffer dosen't change
smatstatus = TRANSACTION_END; // dummy status
}
if( !master_update && !need_retry) {
status = soft_serial_transaction(GET_SLAVE_STATUS);
} else {
status = soft_serial_transaction(PUT_MASTER_GET_SLAVE_STATUS);
}
if( status == TRANSACTION_END ) {
s_change_new = slave_buffer_change_count;
need_retry = 0;
} else {
need_retry = 1;
}
return smatstatus;
}
#endif // SERIAL_USE_MULTI_TRANSACTION
#endif /* USE_SERIAL */
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