#include "serial.h"
//#include <pro_micro.h>
-#ifdef USE_SERIAL
+#ifdef SOFT_SERIAL_PIN
+
+#ifdef __AVR_ATmega32U4__
+ // if using ATmega32U4 I2C, can not use PD0 and PD1 in soft serial.
+ #ifdef USE_I2C
+ #if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
+ #error Using ATmega32U4 I2C, so can not use PD0, PD1
+ #endif
+ #endif
+
+ #if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
+ #define SERIAL_PIN_DDR DDRD
+ #define SERIAL_PIN_PORT PORTD
+ #define SERIAL_PIN_INPUT PIND
+ #if SOFT_SERIAL_PIN == D0
+ #define SERIAL_PIN_MASK _BV(PD0)
+ #define EIMSK_BIT _BV(INT0)
+ #define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
+ #define SERIAL_PIN_INTERRUPT INT0_vect
+ #elif SOFT_SERIAL_PIN == D1
+ #define SERIAL_PIN_MASK _BV(PD1)
+ #define EIMSK_BIT _BV(INT1)
+ #define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
+ #define SERIAL_PIN_INTERRUPT INT1_vect
+ #elif SOFT_SERIAL_PIN == D2
+ #define SERIAL_PIN_MASK _BV(PD2)
+ #define EIMSK_BIT _BV(INT2)
+ #define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
+ #define SERIAL_PIN_INTERRUPT INT2_vect
+ #elif SOFT_SERIAL_PIN == D3
+ #define SERIAL_PIN_MASK _BV(PD3)
+ #define EIMSK_BIT _BV(INT3)
+ #define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
+ #define SERIAL_PIN_INTERRUPT INT3_vect
+ #endif
+ #elif SOFT_SERIAL_PIN == E6
+ #define SERIAL_PIN_DDR DDRE
+ #define SERIAL_PIN_PORT PORTE
+ #define SERIAL_PIN_INPUT PINE
+ #define SERIAL_PIN_MASK _BV(PE6)
+ #define EIMSK_BIT _BV(INT6)
+ #define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
+ #define SERIAL_PIN_INTERRUPT INT6_vect
+ #else
+ #error invalid SOFT_SERIAL_PIN value
+ #endif
+
+#else
+ #error serial.c now support ATmega32U4 only
+#endif
#ifndef SERIAL_USE_MULTI_TRANSACTION
/* --- USE Simple API (OLD API, compatible with let's split serial.c) */
};
void serial_master_init(void)
-{ soft_serial_initiator_init(transactions); }
+{ soft_serial_initiator_init(transactions, TID_LIMIT(transactions)); }
void serial_slave_init(void)
-{ soft_serial_target_init(transactions); }
+{ soft_serial_target_init(transactions, TID_LIMIT(transactions)); }
// 0 => no error
// 1 => slave did not respond
// 2 => checksum error
int serial_update_buffers()
-{ return soft_serial_transaction(); }
+{
+ int result;
+ result = soft_serial_transaction();
+ return result;
+}
#endif // Simple API (OLD API, compatible with let's split serial.c)
#define NO_INLINE __attribute__((noinline))
#define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
-// Serial pulse period in microseconds.
-#define TID_SEND_ADJUST 14
+// parity check
+#define ODD_PARITY 1
+#define EVEN_PARITY 0
+#define PARITY EVEN_PARITY
+
+#ifdef SERIAL_DELAY
+ // custom setup in config.h
+ // #define TID_SEND_ADJUST 2
+ // #define SERIAL_DELAY 6 // micro sec
+ // #define READ_WRITE_START_ADJUST 30 // cycles
+ // #define READ_WRITE_WIDTH_ADJUST 8 // cycles
+#else
+// ============ Standard setups ============
+
+#ifndef SELECT_SOFT_SERIAL_SPEED
+#define SELECT_SOFT_SERIAL_SPEED 1
+// 0: about 189kbps
+// 1: about 137kbps (default)
+// 2: about 75kbps
+// 3: about 39kbps
+// 4: about 26kbps
+// 5: about 20kbps
+#endif
+
+#define TID_SEND_ADJUST 2
-#define SELECT_SERIAL_SPEED 1
-#if SELECT_SERIAL_SPEED == 0
+#if SELECT_SOFT_SERIAL_SPEED == 0
// Very High speed
#define SERIAL_DELAY 4 // micro sec
#define READ_WRITE_START_ADJUST 33 // cycles
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-#elif SELECT_SERIAL_SPEED == 1
+ #define READ_WRITE_WIDTH_ADJUST 6 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 1
// High speed
#define SERIAL_DELAY 6 // micro sec
#define READ_WRITE_START_ADJUST 30 // cycles
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-#elif SELECT_SERIAL_SPEED == 2
+ #define READ_WRITE_WIDTH_ADJUST 7 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 2
// Middle speed
#define SERIAL_DELAY 12 // micro sec
#define READ_WRITE_START_ADJUST 30 // cycles
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-#elif SELECT_SERIAL_SPEED == 3
+ #define READ_WRITE_WIDTH_ADJUST 7 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 3
// Low speed
#define SERIAL_DELAY 24 // micro sec
#define READ_WRITE_START_ADJUST 30 // cycles
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-#elif SELECT_SERIAL_SPEED == 4
+ #define READ_WRITE_WIDTH_ADJUST 7 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 4
// Very Low speed
- #define SERIAL_DELAY 50 // micro sec
+ #define SERIAL_DELAY 36 // micro sec
+ #define READ_WRITE_START_ADJUST 30 // cycles
+ #define READ_WRITE_WIDTH_ADJUST 7 // cycles
+#elif SELECT_SOFT_SERIAL_SPEED == 5
+ // Ultra Low speed
+ #define SERIAL_DELAY 48 // micro sec
#define READ_WRITE_START_ADJUST 30 // cycles
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
+ #define READ_WRITE_WIDTH_ADJUST 7 // cycles
#else
-#error Illegal Serial Speed
-#endif
-
+#error invalid SELECT_SOFT_SERIAL_SPEED value
+#endif /* SELECT_SOFT_SERIAL_SPEED */
+#endif /* SERIAL_DELAY */
#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
#endif
static SSTD_t *Transaction_table = NULL;
+static uint8_t Transaction_table_size = 0;
inline static
void serial_delay(void) {
SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
}
-void soft_serial_initiator_init(SSTD_t *sstd_table)
+void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size)
{
Transaction_table = sstd_table;
+ Transaction_table_size = (uint8_t)sstd_table_size;
serial_output();
serial_high();
}
-void soft_serial_target_init(SSTD_t *sstd_table)
+void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size)
{
Transaction_table = sstd_table;
+ Transaction_table_size = (uint8_t)sstd_table_size;
serial_input_with_pullup();
-#if SERIAL_PIN_MASK == _BV(PD0)
- // Enable INT0
- EIMSK |= _BV(INT0);
- // Trigger on falling edge of INT0
- EICRA &= ~(_BV(ISC00) | _BV(ISC01));
-#elif SERIAL_PIN_MASK == _BV(PD2)
- // Enable INT2
- EIMSK |= _BV(INT2);
- // Trigger on falling edge of INT2
- EICRA &= ~(_BV(ISC20) | _BV(ISC21));
+ // Enable INT0-INT3,INT6
+ EIMSK |= EIMSK_BIT;
+#if SERIAL_PIN_MASK == _BV(PE6)
+ // Trigger on falling edge of INT6
+ EICRB &= EICRx_BIT;
#else
- #error unknown SERIAL_PIN_MASK value
+ // Trigger on falling edge of INT0-INT3
+ EICRA &= EICRx_BIT;
#endif
}
uint8_t byte, i, p, pb;
_delay_sub_us(READ_WRITE_START_ADJUST);
- for( i = 0, byte = 0, p = 0; i < bit; i++ ) {
+ for( i = 0, byte = 0, p = PARITY; i < bit; i++ ) {
serial_delay_half1(); // read the middle of pulses
if( serial_read_pin() ) {
- byte = (byte << 1) | 1; p ^= 1;
+ byte = (byte << 1) | 1; p ^= 1;
} else {
- byte = (byte << 1) | 0; p ^= 0;
+ byte = (byte << 1) | 0; p ^= 0;
}
_delay_sub_us(READ_WRITE_WIDTH_ADJUST);
serial_delay_half2();
void serial_write_chunk(uint8_t data, uint8_t bit) NO_INLINE;
void serial_write_chunk(uint8_t data, uint8_t bit) {
uint8_t b, p;
- for( p = 0, b = 1<<(bit-1); b ; b >>= 1) {
- if(data & b) {
- serial_high(); p ^= 1;
- } else {
- serial_low(); p ^= 0;
- }
- serial_delay();
+ for( p = PARITY, b = 1<<(bit-1); b ; b >>= 1) {
+ if(data & b) {
+ serial_high(); p ^= 1;
+ } else {
+ serial_low(); p ^= 0;
+ }
+ serial_delay();
}
/* send parity bit */
if(p & 1) { serial_high(); }
serial_delay_half1(); //4
}
+static inline uint8_t nibble_bits_count(uint8_t bits)
+{
+ bits = (bits & 0x5) + (bits >> 1 & 0x5);
+ bits = (bits & 0x3) + (bits >> 2 & 0x3);
+ return bits;
+}
+
// interrupt handle to be used by the target device
ISR(SERIAL_PIN_INTERRUPT) {
SSTD_t *trans = Transaction_table;
#else
// recive transaction table index
- uint8_t tid;
+ uint8_t tid, bits;
uint8_t pecount = 0;
sync_recv();
- tid = serial_read_chunk(&pecount,4);
- if(pecount> 0)
+ bits = serial_read_chunk(&pecount,7);
+ tid = bits>>3;
+ bits = (bits&7) != nibble_bits_count(tid);
+ if( bits || pecount> 0 || tid > Transaction_table_size ) {
return;
+ }
serial_delay_half1();
serial_high(); // response step1 low->high
// target send phase
if( trans->target2initiator_buffer_size > 0 )
serial_send_packet((uint8_t *)trans->target2initiator_buffer,
- trans->target2initiator_buffer_size);
+ trans->target2initiator_buffer_size);
// target switch to input
change_sender2reciver();
// target recive phase
if( trans->initiator2target_buffer_size > 0 ) {
if (serial_recive_packet((uint8_t *)trans->initiator2target_buffer,
- trans->initiator2target_buffer_size) ) {
- *trans->status = TRANSACTION_ACCEPTED;
+ trans->initiator2target_buffer_size) ) {
+ *trans->status = TRANSACTION_ACCEPTED;
} else {
- *trans->status = TRANSACTION_DATA_ERROR;
+ *trans->status = TRANSACTION_DATA_ERROR;
}
} else {
*trans->status = TRANSACTION_ACCEPTED;
SSTD_t *trans = Transaction_table;
#else
int soft_serial_transaction(int sstd_index) {
+ if( sstd_index > Transaction_table_size )
+ return TRANSACTION_TYPE_ERROR;
SSTD_t *trans = &Transaction_table[sstd_index];
#endif
cli();
#else
// send transaction table index
+ int tid = (sstd_index<<3) | (7 & nibble_bits_count(sstd_index));
sync_send();
_delay_sub_us(TID_SEND_ADJUST);
- serial_write_chunk(sstd_index, 4);
+ serial_write_chunk(tid, 7);
serial_delay_half1();
// wait for the target response (step1 low->high)
// check if the target is present (step2 high->low)
for( int i = 0; serial_read_pin(); i++ ) {
if (i > SLAVE_INT_ACK_WIDTH + 1) {
- // slave failed to pull the line low, assume not present
- serial_output();
- serial_high();
- *trans->status = TRANSACTION_NO_RESPONSE;
- sei();
- return TRANSACTION_NO_RESPONSE;
+ // slave failed to pull the line low, assume not present
+ serial_output();
+ serial_high();
+ *trans->status = TRANSACTION_NO_RESPONSE;
+ sei();
+ return TRANSACTION_NO_RESPONSE;
}
_delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
}
// if the target is present syncronize with it
if( trans->target2initiator_buffer_size > 0 ) {
if (!serial_recive_packet((uint8_t *)trans->target2initiator_buffer,
- trans->target2initiator_buffer_size) ) {
- serial_output();
- serial_high();
- *trans->status = TRANSACTION_DATA_ERROR;
- sei();
- return TRANSACTION_DATA_ERROR;
+ trans->target2initiator_buffer_size) ) {
+ serial_output();
+ serial_high();
+ *trans->status = TRANSACTION_DATA_ERROR;
+ sei();
+ return TRANSACTION_DATA_ERROR;
}
}
// initiator send phase
if( trans->initiator2target_buffer_size > 0 ) {
serial_send_packet((uint8_t *)trans->initiator2target_buffer,
- trans->initiator2target_buffer_size);
+ trans->initiator2target_buffer_size);
}
// always, release the line when not in use
#endif
#endif
+
+// Helix serial.c history
+// 2018-1-29 fork from let's split (#2308)
+// 2018-6-28 bug fix master to slave comm (#3255)
+// 2018-8-11 improvements (#3608)
+// 2018-10-21 fix serial and RGB animation conflict (#4191)
projects / qmk_firmware.git / commitdiff