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fix serial driver

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This commit is contained in:
matt 2020-05-15 12:13:42 -07:00
parent 2cae488de8
commit de7f1c0295
1 changed files with 12 additions and 10 deletions
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22
libraries/AltSoftSerial/AltSoftSerial.cpp
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@ -41,7 +41,7 @@
bool timing_error=false;
static uint8_t rx_state;
static volatile uint8_t rx_state;
static uint8_t rx_byte;
static uint8_t rx_bit = 0;
static uint16_t rx_target;
@ -50,8 +50,9 @@ static volatile uint8_t rx_buffer_tail;
#define RX_BUFFER_SIZE 80
static volatile uint8_t rx_buffer[RX_BUFFER_SIZE];
const uint32_t cycles_per_bit = (ALTSS_BASE_FREQ + 4800 / 2) / 4800;
const uint16_t rx_stop_ticks= cycles_per_bit * 37 / 4;
const static uint32_t cycles_per_bit = 1667UL;
// (ALTSS_BASE_FREQ + 9600 / 2) / 9600UL;
const static uint32_t rx_stop_ticks = 15419UL;
#ifndef INPUT_PULLUP
#define INPUT_PULLUP INPUT
@ -61,7 +62,9 @@ const uint16_t rx_stop_ticks= cycles_per_bit * 37 / 4;
void softserial_init()
{
// rx_stop_ticks = cycles_per_bit * 37 / 4;
//Serial.printf("cycles_per_bit = %d\n", cycles_per_bit);
CONFIG_TIMER_NOPRESCALE();
pinMode(INPUT_CAPTURE_PIN, INPUT_PULLUP);
digitalWrite(OUTPUT_COMPARE_A_PIN, HIGH);
pinMode(OUTPUT_COMPARE_A_PIN, OUTPUT);
@ -69,6 +72,7 @@ void softserial_init()
rx_buffer_head = 0;
rx_buffer_tail = 0;
ENABLE_INT_INPUT_CAPTURE();
DISABLE_INT_COMPARE_A();
}
void softserial_end(void)
@ -80,16 +84,12 @@ void softserial_end(void)
// TODO: restore timer to original settings?
}
static uint8_t state, bit, head, tail, out;
ISR(COMPARE_A_INTERRUPT)
{
}
/****************************************/
/** Reception **/
/****************************************/
ISR(CAPTURE_INTERRUPT)
{
uint8_t bit, head, state;
uint16_t capture, target;
uint16_t offset, offset_overflow;
@ -142,6 +142,7 @@ ISR(CAPTURE_INTERRUPT)
ISR(COMPARE_B_INTERRUPT)
{
uint8_t state, bit, head;
DISABLE_INT_COMPARE_B();
CONFIG_CAPTURE_FALLING_EDGE();
state = rx_state;
@ -163,7 +164,7 @@ ISR(COMPARE_B_INTERRUPT)
const int softserial_read()
{
uint8_t head, tail, out;
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
@ -175,6 +176,7 @@ const int softserial_read()
const int softserial_available()
{
uint8_t head, tail;
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;