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dev_beta_softSerial #4

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klassents merged 31 commits from dev_beta_softSerial into dev_beta 2024-10-14 05:07:05 +03:00
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+120 -174
4 changed files with 120 additions and 174 deletions
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cores/arduino/mik32/shared/ldscripts/spifi_cpp.ld
+3 -2
View File
@@ -53,9 +53,10 @@ SECTIONS {
*(.srodata.cst16) *(.srodata.cst8) *(.srodata.cst4) *(.srodata.cst2) *(.srodata*)
*(.sdata .sdata.* .sdata* .sdata*.* .gnu.linkonce.s.*)
*(.data .data.*)
*(.ramfunc)
. = ALIGN(CL_SIZE);
} >ram
} >ram
__DATA_IMAGE_START__ = LOADADDR(.data);
__DATA_IMAGE_END__ = LOADADDR(.data) + SIZEOF(.data);
ASSERT(__DATA_IMAGE_END__ < ORIGIN(rom) + LENGTH(rom), "Data image overflows rom section")
cores/arduino/trap_handler.c
+6 -4
View File
@@ -8,10 +8,16 @@ void __attribute__((weak)) wire_handler_wrapper(void)
{
// dummy function for case when wire library is not in use
}
extern void softSerial_handler_wrapper(void);
// ---------------------------------------------- //
void trap_handler(void)
{
// gpio interrupt
if (EPIC_CHECK_GPIO_IRQ())
// gpio_interrupts_handler();
softSerial_handler_wrapper();
// tone timer interrupt
if (EPIC_CHECK_TIMER16_1())
tone_interrupt_handler();
@@ -23,10 +29,6 @@ void trap_handler(void)
// uart1 interrupt
if (EPIC_CHECK_UART_1())
serial_handler_wrapper(1);
// gpio interrupt
if (EPIC_CHECK_GPIO_IRQ())
gpio_interrupts_handler();
// i2c interrupt
if (EPIC_CHECK_I2C_1())
libraries/SoftwareSerial/src/SoftwareSerial.cpp
+109 -166
View File
@@ -17,66 +17,39 @@ The latest version of this library can always be found at
http://arduiniana.org.
*/
// When set, _DEBUG co-opts pins 11 and 13 for debugging with an
// oscilloscope or logic analyzer. Beware: it also slightly modifies
// the bit times, so don't rely on it too much at high baud rates
#define _DEBUG 0
#define _DEBUG_PIN1 11
#define _DEBUG_PIN2 13
#define MAX_SOFT_SERIAL_SPEED 115200
#define MIN_SOFT_SERIAL_SPEED 300
//
// Includes
//
// #include <avr/pgmspace.h>
#include <Arduino.h>
#include <SoftwareSerial.h>
#include "mik32_hal_irq.h"
#include "mik32_hal_gpio.h"
#include "mik32_hal_scr1_timer.h"
//
#define MAX_SOFT_SERIAL_SPEED 115200
#define MIN_SOFT_SERIAL_SPEED 300
// --------- TO LL ---------
// get ticks from systick
#define SYSTICK_GET_TICKS() ((uint64_t)(SCR1_TIMER->MTIMEH)<<32 | SCR1_TIMER->MTIME)
#define GPIO_SET_PIN(GPIO_x, pin) ((GPIO_x)->SET = (pin))
#define GPIO_CLEAR_PIN(GPIO_x, pin) ((GPIO_x)->CLEAR = (pin))
#define GPIO_READ_PIN(GPIO_x, pin) (((GPIO_x)->SET & (pin)) != (uint32_t)GPIO_PIN_LOW ? GPIO_PIN_HIGH : GPIO_PIN_LOW)
// --------- TO LL ---------
// Statics
//
// static variable is common to all class instances
SoftwareSerial *SoftwareSerial::active_object = 0;
uint8_t SoftwareSerial::_receive_buffer[_SS_MAX_RX_BUFF];
volatile uint8_t SoftwareSerial::_receive_buffer_tail = 0;
volatile uint8_t SoftwareSerial::_receive_buffer_head = 0;
//
// Debugging
//
// This function generates a brief pulse
// for debugging or measuring on an oscilloscope.
// #if _DEBUG
// inline void DebugPulse(uint8_t pin, uint8_t count)
// {
// volatile uint8_t *pport = portOutputRegister(digitalPinToPort(pin));
// uint8_t val = *pport;
// while (count--)
// {
// *pport = val | digitalPinToBitMask(pin);
// *pport = val;
// }
// }
// #else
// inline void DebugPulse(uint8_t, uint8_t) {}
// #endif
//
// Private methods
//
// get ticks from systick
#define CURRENT_TICKS ((uint64_t)(SCR1_TIMER->MTIMEH)<<32 | SCR1_TIMER->MTIME)
// function placed in ram. Should not call other function placed in flash
void SoftwareSerial::tunedDelay(uint32_t delayTicks)
{
uint64_t startTicks = CURRENT_TICKS;
while ((CURRENT_TICKS - startTicks) < delayTicks)
uint64_t startTicks = SYSTICK_GET_TICKS();
while ((SYSTICK_GET_TICKS() - startTicks) < delayTicks)
;
}
@@ -120,71 +93,68 @@ bool SoftwareSerial::stopListening()
//
void SoftwareSerial::recv()
{
// if (active_object)
// {
// uint8_t data = 0;
uint8_t data = 0;
// If RX line is high, then we don't see any start bit
// so interrupt is probably not for us
if (_inverse_logic ? rx_pin_read() : !rx_pin_read())
{
HAL_GPIO_WritePin(GPIO_0, GPIO_PIN_8, GPIO_PIN_HIGH);
// Disable further interrupts during reception, this prevents
// triggering another interrupt directly after we return, which can
// cause problems at higher baudrates.
setRxIntMsk(false);
// // If RX line is high, then we don't see any start bit
// // so interrupt is probably not for us
// if (_inverse_logic ? rx_pin_read() : !rx_pin_read())
// {
// // Disable further interrupts during reception, this prevents
// // triggering another interrupt directly after we return, which can
// // cause problems at higher baudrates.
// setRxIntMsk(false);
// Wait approximately 1/2 of a bit width to "center" the sample
tunedDelay(_rx_delay_centering);
// DebugPulse(_DEBUG_PIN2, 1);
// // Wait approximately 1/2 of a bit width to "center" the sample
// tunedDelay(_rx_delay_centering);
// // DebugPulse(_DEBUG_PIN2, 1);
// Read each of the 8 bits
for (uint8_t i=8; i > 0; --i)
{
tunedDelay(_rx_delay_intrabit);
data >>= 1;
// DebugPulse(_DEBUG_PIN2, 1);
if (rx_pin_read())
data |= 0x80;
}
// // Read each of the 8 bits
// for (uint8_t i=8; i > 0; --i)
// {
// tunedDelay(_rx_delay_intrabit);
// data >>= 1;
// // DebugPulse(_DEBUG_PIN2, 1);
// if (rx_pin_read())
// data |= 0x80;
// }
if (_inverse_logic)
data = ~data;
// if (_inverse_logic)
// data = ~data;
// if buffer full, set the overflow flag and return
uint8_t next = (_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF;
if (next != _receive_buffer_head)
{
// save new data in buffer: tail points to where byte goes
_receive_buffer[_receive_buffer_tail] = data; // save new byte
_receive_buffer_tail = next;
}
else
{
// DebugPulse(_DEBUG_PIN1, 1);
_buffer_overflow = true;
}
// // if buffer full, set the overflow flag and return
// uint8_t next = (_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF;
// if (next != _receive_buffer_head)
// {
// // save new data in buffer: tail points to where byte goes
// _receive_buffer[_receive_buffer_tail] = data; // save new byte
// _receive_buffer_tail = next;
// }
// else
// {
// // DebugPulse(_DEBUG_PIN1, 1);
// _buffer_overflow = true;
// }
// skip the stop bit
tunedDelay(_rx_delay_stopbit);
// DebugPulse(_DEBUG_PIN1, 1);
// // skip the stop bit
// tunedDelay(_rx_delay_stopbit);
// // DebugPulse(_DEBUG_PIN1, 1);
// // Re-enable interrupts when we're sure to be inside the stop bit
// setRxIntMsk(true);
// }
// }
// Re-enable interrupts when we're sure to be inside the stop bit
setRxIntMsk(true);
HAL_GPIO_WritePin(GPIO_0, GPIO_PIN_8, GPIO_PIN_LOW);
}
HAL_GPIO_ClearInterrupts();
}
uint8_t SoftwareSerial::rx_pin_read()
{
return (uint8_t)HAL_GPIO_ReadPin((GPIO_TypeDef *)_receivePortRegister, (HAL_PinsTypeDef)_receiveBitMask);
return (uint8_t)GPIO_READ_PIN((GPIO_TypeDef *)_receivePortRegister, (HAL_PinsTypeDef)_receiveBitMask);
}
//
// Interrupt handling
//
/* static */
inline void SoftwareSerial::handle_interrupt() // todo унести в обработчик прерываний
inline void SoftwareSerial::handle_interrupt()
{
if (active_object)
{
@@ -192,12 +162,11 @@ inline void SoftwareSerial::handle_interrupt() // todo унести в обра
}
}
// #if defined(PCINT0_vect)
// ISR(PCINT0_vect)
// {
// SoftwareSerial::handle_interrupt();
// }
// #endif
extern "C" void softSerial_handler_wrapper(void)
{
SoftwareSerial::handle_interrupt();
}
//
// Constructor
@@ -235,10 +204,8 @@ void SoftwareSerial::setRX(uint8_t rx)
{
_receiveBitMask = (uint16_t)digitalPinToBitMask(rx); // save rx bit mask
_receivePortRegister = (uint32_t)digitalPinToPort(rx); // save rx port adress
// attachInterrupt(digitalPinToInterrupt(rx), [this]() { this->recv(); }, _inverse_logic ? RISING : FALLING);
if (!_inverse_logic)
pinMode(rx, INPUT_PULLUP); // pullup for normal logic
// HAL_GPIO_PinConfig((GPIO_TypeDef*)_receivePortRegister, (HAL_PinsTypeDef)_receiveBitMask, HAL_GPIO_MODE_GPIO_INPUT, HAL_GPIO_PULL_UP, HAL_GPIO_DS_2MA);
else
pinMode(rx, INPUT);
}
@@ -269,78 +236,54 @@ void SoftwareSerial::begin(long speed)
// Precalculate the various delays in number of ticks
uint32_t bit_delay = F_CPU / speed;
// 12 (gcc 4.8.2) or 13 (gcc 4.3.2) cycles from start bit to first bit,
// 15 (gcc 4.8.2) or 16 (gcc 4.3.2) cycles between bits,
// 12 (gcc 4.8.2) or 14 (gcc 4.3.2) cycles from last bit to stop bit
// These are all close enough to just use 15 cycles, since the inter-bit
// timings are the most critical (deviations stack 8 times)
// empirical value
_tx_delay = subtract_cap(bit_delay, 35); // 15
// Only setup rx when we have a valid INT for this pin
if (digitalPinToInterrupt(_receivePin) != NOT_AN_INTERRUPT)
{
// #if GCC_VERSION > 40800
// // Timings counted from gcc 4.8.2 output. This works up to 115200 on
// // 16Mhz and 57600 on 8Mhz.
// //
// // When the start bit occurs, there are 3 or 4 cycles before the
// // interrupt flag is set, 4 cycles before the PC is set to the right
// // interrupt vector address and the old PC is pushed on the stack,
// // and then 75 cycles of instructions (including the RJMP in the
// // ISR vector table) until the first delay. After the delay, there
// // are 17 more cycles until the pin value is read (excluding the
// // delay in the loop).
// // We want to have a total delay of 1.5 bit time. Inside the loop,
// // we already wait for 1 bit time - 23 cycles, so here we wait for
// // 0.5 bit time - (71 + 18 - 22) cycles.
// _rx_delay_centering = subtract_cap(bit_delay / 2, (4 + 4 + 75 + 17 - 23));
// When the start bit occurs, there are 3 or 4 cycles before the
// interrupt flag is set, 4 cycles before the PC is set to the right
// interrupt vector address and the old PC is pushed on the stack,
// and then 75 cycles of instructions (including the RJMP in the
// ISR vector table) until the first delay. After the delay, there
// are 17 more cycles until the pin value is read (excluding the
// delay in the loop).
// We want to have a total delay of 1.5 bit time. Inside the loop,
// we already wait for 1 bit time - 23 cycles, so here we wait for
// 0.5 bit time - (71 + 18 - 22) cycles.
// _rx_delay_centering = subtract_cap(bit_delay / 2, (77));
_rx_delay_centering = subtract_cap(bit_delay / 2, (123));
// // There are 23 cycles in each loop iteration (excluding the delay)
// There are 23 cycles in each loop iteration (excluding the delay)
// _rx_delay_intrabit = subtract_cap(bit_delay, 23);
_rx_delay_intrabit = subtract_cap(bit_delay, 11);
// // There are 37 cycles from the last bit read to the start of
// // stopbit delay and 11 cycles from the delay until the interrupt
// // mask is enabled again (which _must_ happen during the stopbit).
// // This delay aims at 3/4 of a bit time, meaning the end of the
// // delay will be at 1/4th of the stopbit. This allows some extra
// // time for ISR cleanup, which makes 115200 baud at 16Mhz work more
// // reliably
// _rx_delay_stopbit = subtract_cap(bit_delay * 3 / 4, (37 + 11));
// #else // Timings counted from gcc 4.3.2 output
// // Note that this code is a _lot_ slower, mostly due to bad register
// // allocation choices of gcc. This works up to 57600 on 16Mhz and
// // 38400 on 8Mhz.
// _rx_delay_centering = subtract_cap(bit_delay / 2, (4 + 4 + 97 + 29 - 11));
// _rx_delay_intrabit = subtract_cap(bit_delay, 11);
// _rx_delay_stopbit = subtract_cap(bit_delay * 3 / 4, (44 + 17));
// #endif
// Enable the INT for the entire port here, but never disable it
// (others might also need it, so we disable the interrupt by using
// the per-pin PCMSK register).
// if (_inverse_logic)
// _int_mode = GPIO_INT_MODE_RISING; // start bit: low to high
// else
// _int_mode = GPIO_INT_MODE_FALLING; // start bit: high to low
// // Save gpio_mux and gpio_line for on/off interrupts
// _int_maskMux = digitalPinToGpioIntMux(_receivePin); // gpio mux value
// _int_maskLine = digitalPinToGpioIntLine(_receivePin); // gpio irq line value
// HAL_EPIC_MaskEdgeSet(HAL_EPIC_GPIO_IRQ_MASK); // turn on the mask in EPIC
// *digitalPinToPCICR((int8_t)_receivePin) |= _BV(digitalPinToPCICRbit(_receivePin));
// _pcint_maskreg = digitalPinToPCMSK(_receivePin);
// _pcint_maskvalue = _BV(digitalPinToPCMSKbit(_receivePin));
// There are 37 cycles from the last bit read to the start of
// stopbit delay and 11 cycles from the delay until the interrupt
// mask is enabled again (which _must_ happen during the stopbit).
// This delay aims at 3/4 of a bit time, meaning the end of the
// delay will be at 1/4th of the stopbit. This allows some extra
// time for ISR cleanup, which makes 115200 baud at 16Mhz work more
// reliably
// _rx_delay_stopbit = subtract_cap(bit_delay * 3 / 4, (48));
_rx_delay_stopbit = subtract_cap(bit_delay * 3 / 4, (61));
// Save start bit polarity - low to high if _inverse_logic
_int_mode = _inverse_logic ? (uint8_t)GPIO_INT_MODE_RISING : (uint8_t)GPIO_INT_MODE_FALLING;
// Save gpio_mux and gpio_line for on/off interrupts
_int_maskMux = digitalPinToGpioIntMux(_receivePin); // gpio mux value
_int_maskLine = digitalPinToGpioIntLine(_receivePin); // gpio irq line value
HAL_EPIC_MaskEdgeSet(HAL_EPIC_GPIO_IRQ_MASK); // turn on the mask in EPIC
}
else
ErrorMsgHandler("SoftwareSerial.begin(): Rx pin does not support interrupts, use different pin");
tunedDelay(_tx_delay); // if we were low this establishes the end
// #if _DEBUG
// pinMode(_DEBUG_PIN1, OUTPUT);
// pinMode(_DEBUG_PIN2, OUTPUT);
// #endif
HAL_GPIO_PinConfig(GPIO_0, GPIO_PIN_8, HAL_GPIO_MODE_GPIO_OUTPUT, HAL_GPIO_PULL_NONE, HAL_GPIO_DS_2MA);
listen();
}
@@ -348,11 +291,11 @@ void SoftwareSerial::begin(long speed)
void SoftwareSerial::setRxIntMsk(bool enable)
{
if (enable)
// enable line interrupt
HAL_GPIO_InitInterruptLine((HAL_GPIO_Line_Config)_int_maskMux, (HAL_GPIO_InterruptMode)_int_mode);
// *_pcint_maskreg |= _pcint_maskvalue;
else
// disable line interrupt
HAL_GPIO_DeInitInterruptLine((HAL_GPIO_Line)_int_maskLine);
// *_pcint_maskreg &= ~_pcint_maskvalue;
}
void SoftwareSerial::end()
@@ -373,27 +316,27 @@ size_t SoftwareSerial::write(uint8_t byte)
// Write the start bit
if (_inverse_logic)
((GPIO_TypeDef *)_transmitPortRegister)->SET = (HAL_PinsTypeDef)_transmitBitMask;
GPIO_SET_PIN((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)_transmitBitMask);
else
((GPIO_TypeDef *)_transmitPortRegister)->CLEAR = (HAL_PinsTypeDef)_transmitBitMask;
GPIO_CLEAR_PIN((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)_transmitBitMask);
tunedDelay(_tx_delay); // wait start bit
// Write each of the 8 bits in LSB mode
for (uint8_t i = 8; i > 0; --i)
{
if (byte & 1) // choose bit
((GPIO_TypeDef *)_transmitPortRegister)->SET = (HAL_PinsTypeDef)_transmitBitMask;
GPIO_SET_PIN((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)_transmitBitMask);
else
((GPIO_TypeDef *)_transmitPortRegister)->CLEAR = (HAL_PinsTypeDef)_transmitBitMask;
GPIO_CLEAR_PIN((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)_transmitBitMask);
tunedDelay(_tx_delay);
byte >>= 1;
}
// restore pin to natural state - stop bit
if (_inverse_logic)
((GPIO_TypeDef *)_transmitPortRegister)->CLEAR = (HAL_PinsTypeDef)_transmitBitMask;
GPIO_CLEAR_PIN((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)_transmitBitMask);
else
((GPIO_TypeDef *)_transmitPortRegister)->SET = (HAL_PinsTypeDef)_transmitBitMask;
GPIO_SET_PIN((GPIO_TypeDef *)_transmitPortRegister, (HAL_PinsTypeDef)_transmitBitMask);
// enable interrupts
set_csr(mstatus, MSTATUS_MIE);
libraries/SoftwareSerial/src/SoftwareSerial.h
+2 -2
View File
@@ -76,7 +76,7 @@ private:
static uint32_t subtract_cap(uint32_t num, uint16_t sub);
// private static method for timing
static void tunedDelay(uint32_t delayTicks) __attribute__((noinline, section(".data"))) ;
static void tunedDelay(uint32_t delayTicks) __attribute__((noinline, section(".ramfunc")));
public:
// public methods
@@ -96,7 +96,7 @@ public:
}
int peek();
virtual size_t write(uint8_t byte) __attribute__((noinline, section(".data")));
virtual size_t write(uint8_t byte) __attribute__((noinline, section(".ramfunc")));
virtual int read();
virtual int available();
virtual void flush();