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helix serial.c debugging...

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pull/3255/head
mtei 7 years ago
parent e0c1a144d6
commit 8c91470e85
1 changed files with 133 additions and 42 deletions
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175
keyboards/helix/serial.c
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@ -14,9 +14,16 @@
#ifdef USE_SERIAL
#define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
// Serial pulse period in microseconds. Its probably a bad idea to lower this
// value.
#define SERIAL_DELAY 30
#define SERIAL_DELAY 6 // micro sec
#define READ_WRITE_START_ADJUST 20 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
@ -30,13 +37,13 @@ void serial_delay(void) {
}
inline static
void serial_delay_half(void) {
_delay_us(SERIAL_DELAY/2);
void serial_delay_half1(void) {
_delay_us(SERIAL_DELAY_HALF1);
}
inline static
void serial_delay_quart(void) {
_delay_us(SERIAL_DELAY/4);
void serial_delay_half2(void) {
_delay_us(SERIAL_DELAY_HALF2);
}
inline static
@ -116,9 +123,10 @@ void sync_recv(void) {
while (!serial_read_pin());
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_SYNC
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
_delay_us(3);
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
//_delay_us(3);
//SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
#endif
#if 0
//serial_delay();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_SYNC
_delay_us(SERIAL_DELAY-8);
@ -126,6 +134,7 @@ void sync_recv(void) {
#else
_delay_us(SERIAL_DELAY-5);
#endif
#endif
}
// Used by the slave to send a synchronization signal to the master.
@ -149,85 +158,120 @@ void sync_send(void) {
static
uint8_t serial_read_byte(void) {
uint8_t byte = 0;
serial_input();
_delay_sub_us(READ_WRITE_START_ADJUST);
for ( uint8_t i = 0; i < 8; ++i) {
serial_delay_half1(); // read the middle of pulses
byte = (byte << 1) | serial_read_pin();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_RCVSAMPLE
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
_delay_us(1);
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
serial_delay();
SERIAL_DBGPIN_PORT ^= SERIAL_DBGPIN_MASK;
//_delay_us(1);
_delay_sub_us(READ_WRITE_WIDTH_ADJUST);
SERIAL_DBGPIN_PORT ^= SERIAL_DBGPIN_MASK;
serial_delay_half2();
#else
serial_delay();
_delay_us(1);
serial_delay_half2();
//_delay_us(1);
_delay_sub_us(READ_WRITE_WIDTH_ADJUST);
#endif
}
return byte;
}
// Sends a byte with MSB ordering
static
void serial_write_byte(uint8_t data) {
uint8_t b = 8;
serial_output();
while( b-- ) {
if(data & (1 << b)) {
uint8_t b = 1<<7;
//serial_output();
while( b ) {
if(data & b) {
serial_high();
} else {
serial_low();
}
b >>= 1;
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_RCVSAMPLE
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
SERIAL_DBGPIN_PORT ^= SERIAL_DBGPIN_MASK;
#endif
serial_delay();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_RCVSAMPLE
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
SERIAL_DBGPIN_PORT ^= SERIAL_DBGPIN_MASK;
#endif
}
serial_low();
}
// interrupt handle to be used by the slave device
ISR(SERIAL_PIN_INTERRUPT) {
sync_send();
// slave send phase
uint8_t checksum = 0;
for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_BYTEWIDTH
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
#endif
serial_write_byte(serial_slave_buffer[i]);
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_BYTEWIDTH
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
sync_send();
checksum += serial_slave_buffer[i];
}
serial_write_byte(checksum);
sync_send();
// wait for the sync to finish sending
serial_delay();
serial_low();
// read the middle of pulses
#if SERIAL_DEBUG_MODE & (SERIAL_DEBUG_MODE_WATCH_SYNC|SERIAL_DEBUG_MODE_WATCH_RCVSAMPLE)
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
// slave switch to input
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
//1
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
_delay_us(1);
#endif
_delay_us(SERIAL_DELAY/2);
#if SERIAL_DEBUG_MODE & (SERIAL_DEBUG_MODE_WATCH_SYNC|SERIAL_DEBUG_MODE_WATCH_RCVSAMPLE)
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
sync_send();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
serial_delay_half1();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
//2
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
_delay_us(1);
#endif
serial_low();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
serial_input();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
//3
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
_delay_us(1);
#endif
serial_delay();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
// slave recv phase
sync_recv();
uint8_t checksum_computed = 0;
for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_BYTEWIDTH
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
#endif
serial_master_buffer[i] = serial_read_byte();
sync_send();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_BYTEWIDTH
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
sync_recv();
checksum_computed += serial_master_buffer[i];
}
uint8_t checksum_received = serial_read_byte();
sync_send();
serial_input(); // end transaction
if ( checksum_computed != checksum_received ) {
status |= SLAVE_DATA_CORRUPT;
} else {
status &= ~SLAVE_DATA_CORRUPT;
}
sync_recv(); //weit master output to hight
}
inline
@ -258,41 +302,88 @@ int serial_update_buffers(void) {
// check if the slave is present
if (serial_read_pin()) {
// slave failed to pull the line low, assume not present
serial_output();
serial_high();
sei();
return 1;
}
// master recv phase
// if the slave is present syncronize with it
sync_recv();
uint8_t checksum_computed = 0;
// receive data from the slave
for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_BYTEWIDTH
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
#endif
serial_slave_buffer[i] = serial_read_byte();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_BYTEWIDTH
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
sync_recv();
checksum_computed += serial_slave_buffer[i];
}
uint8_t checksum_received = serial_read_byte();
sync_recv();
if (checksum_computed != checksum_received) {
serial_output();
serial_high();
sei();
return 2;
}
// master switch to output
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
//1
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
_delay_us(1);
#endif
sync_recv();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
serial_delay();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
//2
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
_delay_us(1);
#endif
serial_output();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
serial_low();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
//3
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
_delay_us(1);
#endif
serial_delay_half1();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_IOCHG
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
// master send phase
uint8_t checksum = 0;
// send data to the slave
sync_send();
for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_BYTEWIDTH
SERIAL_DBGPIN_PORT |= SERIAL_DBGPIN_MASK;
#endif
serial_write_byte(serial_master_buffer[i]);
sync_recv();
#if SERIAL_DEBUG_MODE & SERIAL_DEBUG_MODE_WATCH_BYTEWIDTH
SERIAL_DBGPIN_PORT &= ~SERIAL_DBGPIN_MASK;
#endif
sync_send();
checksum += serial_master_buffer[i];
}
serial_write_byte(checksum);
sync_recv();
// always, release the line when not in use
serial_output();
serial_high();
sync_send();
sei();
return 0;

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