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usart.c
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usart.c
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/*!
* \brief
*
* \author Jan Oleksiewicz <jnk0le@hotmail.com>
* \license SPDX-License-Identifier: MIT
*/
#include <avr/io.h>
#include <util/delay.h>
#include <util/atomic.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <stdlib.h>
#include <stdio.h>
#include "usart.h"
#ifndef NO_TX0_INTERRUPT
volatile uint8_t tx0_Tail, tx0_Head;
char tx0_buffer[TX0_BUFFER_SIZE] __attribute__ ((used));
#endif
#ifndef NO_RX0_INTERRUPT
volatile uint8_t rx0_Tail, rx0_Head;
char rx0_buffer[RX0_BUFFER_SIZE] __attribute__ ((used));
#endif
#ifndef NO_TX1_INTERRUPT
volatile uint8_t tx1_Tail, tx1_Head;
char tx1_buffer[TX1_BUFFER_SIZE] __attribute__ ((used));
#endif
#ifndef NO_RX1_INTERRUPT
volatile uint8_t rx1_Tail, rx1_Head;
char rx1_buffer[RX1_BUFFER_SIZE] __attribute__ ((used));
#endif
#ifndef NO_TX2_INTERRUPT
volatile uint8_t tx2_Tail, tx2_Head;
char tx2_buffer[TX2_BUFFER_SIZE] __attribute__ ((used));
#endif
#ifndef NO_RX2_INTERRUPT
volatile uint8_t rx2_Tail, rx2_Head;
char rx2_buffer[RX2_BUFFER_SIZE] __attribute__ ((used));
#endif
#ifndef NO_TX3_INTERRUPT
volatile uint8_t tx3_Tail, tx3_Head;
char tx3_buffer[TX3_BUFFER_SIZE] __attribute__ ((used));
#endif
#ifndef NO_RX3_INTERRUPT
volatile uint8_t rx3_Tail, rx3_Head;
char rx3_buffer[RX3_BUFFER_SIZE] __attribute__ ((used));
#endif
#ifdef USART_NO_LOCAL_BUFFERS
extern char u_tmp_buff[];
#endif
#ifdef USE_USART0
/*
void uart_init(uint16_t ubrr_value)
{
#ifdef USART0_RS485_MODE
RS485_CONTROL0_DDR |= (1<<RS485_CONTROL0_IONUM); // default pin state is low
#endif
UBRR0L_REGISTER = (uint8_t) ubrr_value;
UBRR0H_REGISTER = (ubrr_value>>8);
#ifdef USART0_U2X_SPEED
#ifdef USART0_MPCM_MODE
UCSR0A_REGISTER = (1<<U2X0_BIT)|(1<<MPCM0_BIT);
#else
UCSR0A_REGISTER = (1<<U2X0_BIT); // enable double speed
#endif
#elif defined(USART0_MPCM_MODE)
UCSR0A_REGISTER |= (1<<MPCM0_BIT);
#endif
UCSR0B_REGISTER = USART0_CONFIG_B;
// 8n1 is set by default, setting UCSRC is not needed
#ifdef USART0_USE_SOFT_RTS
RTS0_DDR |= (1<<RTS0_IONUM);
#endif
}
*/
//******************************************************************
//Function : To reinitialize USART interface (runtime speed changing).
//Arguments : Calculated UBRR value to initialize equal speed.
//Return : none
//Note : Use BAUD_CALC(speed) macro to calculate UBRR value.
// : All data inside UDR shift register will be lost.
// : U2X bit is cleared if USARTn_U2X_SPEED is not defined.
//******************************************************************
void uart0_reinit(uint16_t ubrr_value)
{
#ifdef USART0_USE_SOFT_RTS
RTS0_PORT |= (1<<RTS0_IONUM);
#endif
#ifdef USART0_RS485_MODE
RS485_CONTROL0_PORT &= ~(1<<RS485_CONTROL0_IONUM); //set low
RS485_CONTROL0_DDR |= (1<<RS485_CONTROL0_IONUM);
#endif
UCSR0B_REGISTER = 0; //flush all hardware buffers
//(writing TXENn to zero) will not become effective until ongoing and pending transmissions are completed
UBRR0L_REGISTER = (uint8_t) ubrr_value;
UBRR0H_REGISTER = (ubrr_value>>8);
#ifdef USART0_U2X_SPEED
#ifdef USART0_MPCM_MODE
UCSR0A_REGISTER = (1<<U2X0_BIT)|(1<<MPCM0_BIT);
#else
UCSR0A_REGISTER = (1<<U2X0_BIT); // enable double speed
#endif
#elif defined(USART0_MPCM_MODE)
UCSR0A_REGISTER = (1<<MPCM0_BIT);
#endif
UCSR0B_REGISTER = USART0_CONFIG_B;
// 8n1 is set by default, setting UCSRC is not needed
#ifdef USART0_USE_SOFT_RTS
RTS0_DDR |= (1<<RTS0_IONUM);
RTS0_PORT &= ~(1<<RTS0_IONUM);
#endif
}
#endif // USE_USART0
#ifdef USE_USART1
void uart1_reinit(uint16_t ubrr_value)
{
#ifdef USART1_USE_SOFT_RTS
RTS1_PORT |= (1<<RTS1_IONUM);
#endif
#ifdef USART1_RS485_MODE
RS485_CONTROL1_PORT &= ~(1<<RS485_CONTROL1_IONUM); //set low
RS485_CONTROL1_DDR |= (1<<RS485_CONTROL1_IONUM);
#endif
UCSR1B_REGISTER = 0; //flush all hardware buffers
//(writing TXENn to zero) will not become effective until ongoing and pending transmissions are completed
UBRR1L_REGISTER = (uint8_t) ubrr_value;
UBRR1H_REGISTER = (ubrr_value>>8);
#ifdef USART1_U2X_SPEED
#ifdef USART1_MPCM_MODE
UCSR1A_REGISTER = (1<<U2X1_BIT)|(1<<MPCM1_BIT);
#else
UCSR1A_REGISTER = (1<<U2X1_BIT); // enable double speed
#endif
#elif defined(USART1_MPCM_MODE)
UCSR1A_REGISTER = (1<<MPCM1_BIT);
#endif
UCSR1B_REGISTER = USART1_CONFIG_B;
// 8n1 is set by default, setting UCSRC is not needed
#ifdef USART1_USE_SOFT_RTS
RTS1_DDR |= (1<<RTS1_IONUM);
RTS1_PORT &= ~(1<<RTS1_IONUM);
#endif
}
#endif // USE_USART1
#ifdef USE_USART2
void uart2_reinit(uint16_t ubrr_value)
{
#ifdef USART2_USE_SOFT_RTS
RTS2_PORT |= (1<<RTS2_IONUM);
#endif
#ifdef USART2_RS485_MODE
RS485_CONTROL2_PORT &= ~(1<<RS485_CONTROL2_IONUM); //set low
RS485_CONTROL2_DDR |= (1<<RS485_CONTROL2_IONUM);
#endif
UCSR2B_REGISTER = 0; //flush all hardware buffers
//(writing TXENn to zero) will not become effective until ongoing and pending transmissions are completed
UBRR2L_REGISTER = (uint8_t) ubrr_value;
UBRR2H_REGISTER = (ubrr_value>>8);
#ifdef USART2_U2X_SPEED
#ifdef USART2_MPCM_MODE
UCSR2A_REGISTER = (1<<U2X2_BIT)|(1<<MPCM2_BIT);
#else
UCSR2A_REGISTER = (1<<U2X2_BIT); // enable double speed
#endif
#elif defined(USART2_MPCM_MODE)
UCSR2A_REGISTER = (1<<MPCM2_BIT);
#endif
UCSR2B_REGISTER = USART2_CONFIG_B;
// 8n1 is set by default, setting UCSRC is not needed
#ifdef USART2_USE_SOFT_RTS
RTS2_DDR |= (1<<RTS2_IONUM);
RTS2_PORT &= ~(1<<RTS2_IONUM);
#endif
}
#endif // USE_USART2
#ifdef USE_USART3
void uart3_reinit(uint16_t ubrr_value)
{
#ifdef USART3_USE_SOFT_RTS
RTS3_PORT |= (1<<RTS3_IONUM);
#endif
#ifdef USART3_RS485_MODE
RS485_CONTROL3_PORT &= ~(1<<RS485_CONTROL3_IONUM); //set low
RS485_CONTROL3_DDR |= (1<<RS485_CONTROL3_IONUM);
#endif
UCSR3B_REGISTER = 0; //flush all hardware buffers
UBRR3L_REGISTER = (uint8_t) ubrr_value;
UBRR3H_REGISTER = (ubrr_value>>8);
#ifdef USART3_U2X_SPEED
#ifdef USART3_MPCM_MODE
UCSR3A_REGISTER = (1<<U2X3_BIT)|(1<<MPCM3_BIT);
#else
UCSR3A_REGISTER = (1<<U2X3_BIT); // enable double speed
#endif
#elif defined(USART3_MPCM_MODE)
UCSR3A_REGISTER = (1<<MPCM3_BIT);
#endif
UCSR3B_REGISTER = USART3_CONFIG_B;
// 8n1 is set by default, setting UCSRC is not needed
#ifdef USART3_USE_SOFT_RTS
RTS3_DDR |= (1<<RTS3_IONUM);
RTS3_PORT &= ~(1<<RTS3_IONUM);
#endif
}
#endif // USE_USART3
#ifndef NO_USART_TX
#ifndef NO_TX0_INTERRUPT
//******************************************************************
//Function : Send single character/byte.
//Arguments : Character/byte to send.
//Return : none
//******************************************************************
#ifdef USART_NO_ABI_BREAKING_PREMATURES
void uart0_putc(char data)
{
#ifdef PUTC0_CONVERT_LF_TO_CRLF
if (data == '\n')
uart0_putc('\r');
#endif
#ifdef USART0_PUTC_FAST_INSERTIONS
register uint8_t tmp_tx_Head = tx0_Head;
register uint8_t tmp_tx_Tail = tx0_Tail;
#ifdef USART0_USE_SOFT_CTS
if(!(CTS0_PIN & (1<<CTS0_IONUM)))
#endif
if(tmp_tx_Tail == tmp_tx_Head && (UCSR0A_REGISTER & UDRE0_BIT))
{
UDR0_REGISTER = data;
return;
}
tmp_tx_Head = (tmp_tx_Head + 1) & TX0_BUFFER_MASK;
while(tmp_tx_Tail == tmp_tx_Head) // wait for free space in buffer
{
tmp_tx_Tail = tx0_Tail; // for faster pass through, results in a little bigger code
}
#else
register uint8_t tmp_tx_Head = (tx0_Head + 1) & TX0_BUFFER_MASK; // calculate new position of TX head in buffer
while(tx0_Tail == tmp_tx_Head); // wait for free space in buffer
#endif
tx0_buffer[tmp_tx_Head] = data;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
{
tx0_Head = tmp_tx_Head;
#ifdef USART0_RS485_MODE
RS485_CONTROL0_PORT |= (1<<RS485_CONTROL0_IONUM); //set high
#endif
#ifdef USART0_USE_SOFT_CTS
if(!(CTS0_PIN & (1<<CTS0_IONUM)))
#endif
{
UCSR0B_REGISTER |= (1<<UDRIE0_BIT); // enable UDRE interrupt
}
}
}
#else // !USART_NO_ABI_BREAKING_PREMATURES
void uart0_putc(char data)
{
register uint8_t tmp_tx_Head asm("r25");
#ifdef PUTC0_CONVERT_LF_TO_CRLF
asm volatile("\n\t"
"cpi %[dat], '\n' \n\t"
"brne skip_recursive_%=\n\t"
"push %[dat] \n\t"
"ldi %[dat], '\r' \n\t"
"rcall uart0_putc \n\t"
"pop %[dat] \n\t"
"skip_recursive_%=:"
: // outputs
[dat] "+r" (data) // will be used later, do not let the compiler to do anything weird
: // inputs
: // clobbers
);
#endif
#ifdef USART0_PUTC_FAST_INSERTIONS
asm volatile("\n\t"
"lds %[head], (tx0_Head) \n\t"
#ifdef USART0_USE_SOFT_CTS
"sbic %M[cts_port], %M[cts_pin] \n\t"
"rjmp normal_insert_%= \n\t"
#endif
"lds r27, (tx0_Tail) \n\t"
"cpse r27, %[head] \n\t"
"rjmp normal_insert_%= \n\t"
#ifdef USART0_IN_IO_ADDRESS_SPACE
"sbis %M[UCSRA_reg_IO], %M[udre_bit] \n\t"
#elif defined(USART0_IN_UPPER_IO_ADDRESS_SPACE)
"in r26, %M[UCSRA_reg_IO] \n\t"
"sbrs r26, %M[udre_bit] \n\t"
#else
"lds r26, %M[UCSRA_reg] \n\t"
"sbrs r26, %M[udre_bit] \n\t"
#endif
"rjmp normal_insert_%= \n\t"
#ifdef USART0_IN_IO_ADDRESS_SPACE
"out %M[UDR_reg], %[dat] \n\t"
#else
"sts %M[UDR_reg], %[dat] \n\t"
#endif
"ret \n\t"
"normal_insert_%=:"
"inc %[head] \n\t"
#if (TX0_BUFFER_MASK != 0xff)
"andi %[head], %M[mask] \n\t"
#endif
"waitforspace_%=:"
"lds r27, (tx0_Tail) \n\t"
"cp r27, %[head] \n\t"
"breq waitforspace_%= \n\t"
: // outputs
[head] "=r" (tmp_tx_Head),
[dat] "+r" (data) // will be used later, do not let the compiler to do anything weird
: // inputs
#ifdef USART0_USE_SOFT_CTS
[cts_port] "M" (_SFR_IO_ADDR(CTS0_PORT)),
[cts_pin] "M" (CTS0_IONUM),
#endif
[mask] "M" (TX0_BUFFER_MASK),
[UCSRA_reg] "n" (_SFR_MEM_ADDR(UCSR0A_REGISTER)),
[UCSRA_reg_IO] "M" (_SFR_IO_ADDR(UCSR0A_REGISTER)),
[UDR_reg] "n" (_SFR_MEM_ADDR(UDR0_REGISTER)),
[UDR_reg_IO] "M" (_SFR_IO_ADDR(UDR0_REGISTER)),
[udre_bit] "M" (UDRE0_BIT)
: // clobbers
"r26","r27"
);
#else
asm volatile("\n\t"
"lds %[head], (tx0_Head) \n\t"
"inc %[head] \n\t"
#if (TX0_BUFFER_MASK != 0xff)
"andi %[head], %M[mask] \n\t"
#endif
"waitforspace_%=:"
"lds r27, (tx0_Tail) \n\t"
"cp r27, %[head] \n\t"
"breq waitforspace_%= \n\t"
: // outputs
[head] "=r" (tmp_tx_Head)
: // inputs
[mask] "M" (TX0_BUFFER_MASK)
: // clobbers
"r27"
);
#endif
asm volatile("\n\t"
"mov r26, %[index] \n\t"
#if !defined(__AVR_ATtiny2313__)&&!defined(__AVR_ATtiny2313A__) // on ATtiny2313 upper byte in pointer pair is ignored
"ldi r27, 0x00 \n\t"
#endif
"subi r26, lo8(-(tx0_buffer)) \n\t"
#ifndef USART_USE_TINY_MEMORY_MODEL
"sbci r27, hi8(-(tx0_buffer)) \n\t"
#endif
"st X, %[dat] \n\t"
: // outputs
[index] "+r" (tmp_tx_Head), // will be used later, do not let the compiler to do anything weird
[dat] "+r" (data) // not modified, so reduce register moves if inlined
: // inputs
: // clobbers
"r26","r27"
);
cli();
{
tx0_Head = tmp_tx_Head;
#ifdef USART0_RS485_MODE
RS485_CONTROL0_PORT |= (1<<RS485_CONTROL0_IONUM); // start transmitting
#endif
#ifdef USART0_USE_SOFT_CTS
if(!(CTS0_PIN & (1<<CTS0_IONUM)))
#endif
{
#ifdef USART0_IN_IO_ADDRESS_SPACE
UCSR0B_REGISTER |= (1<<UDRIE0_BIT); // enable UDRE interrupt
#else
asm volatile("\n\t"
#ifdef USART0_IN_UPPER_IO_ADDRESS_SPACE
"in r25, %M[control_reg_IO] \n\t"
"ori r25, (1<<%M[udrie_bit]) \n\t"
"out %M[control_reg_IO], r25\n\t"
#else
"lds r25, %M[control_reg] \n\t"
"ori r25, (1<<%M[udrie_bit]) \n\t"
"sts %M[control_reg], r25 \n\t"
#endif
: // outputs
: // inputs
[control_reg] "n" (_SFR_MEM_ADDR(UCSR0B_REGISTER)),
[udrie_bit] "M" (UDRIE0_BIT)
: // clobbers
"r25"
);
#endif
}
}
reti();
asm volatile("\n\t"::"r" (data):); // data was passed in r24 and will be returned in the same register, make sure it is not affected by the compiler
}
char uart0_putc_(char data) __attribute__ ((alias ("uart0_putc"))); // alias for uart_putc that returns passed argument unaffected by omitting any existent rule
#endif // USART_NO_ABI_BREAKING_PREMATURES
//******************************************************************
//Function : Send single character/byte.
//Arguments : Character/byte to send.
//Return : Status value: 0 = BUFFER_FULL, 1 = COMPLETED.
//Note : If character cannot be sent due to full transmit buffer, function will abort transmitting character
//******************************************************************
#ifdef USART_NO_ABI_BREAKING_PREMATURES
uint8_t uart0_putc_noblock(char data)
{
#ifdef USART0_PUTC_FAST_INSERTIONS
register uint8_t tmp_tx_Head = tx0_Head;
register uint8_t tmp_tx_Tail = tx0_Tail;
#ifdef USART0_USE_SOFT_CTS
if(!(CTS0_PIN & (1<<CTS0_IONUM)))
#endif
if(tmp_tx_Tail == tmp_tx_Head && (UCSR0A_REGISTER & UDRE0_BIT))
{
UDR0_REGISTER = data;
return COMPLETED;
}
tmp_tx_Head = (tmp_tx_Head + 1) & TX0_BUFFER_MASK;
if(tmp_tx_Tail == tmp_tx_Head)
return BUFFER_FULL;
#else
register uint8_t tmp_tx_Head = (tx0_Head + 1) & TX0_BUFFER_MASK; // calculate new position of TX head in buffer
if(tx0_Tail == tmp_tx_Head)
return BUFFER_FULL;
#endif
tx0_buffer[tmp_tx_Head] = data;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
{
tx0_Head = tmp_tx_Head;
#ifdef USART0_RS485_MODE
RS485_CONTROL0_PORT |= (1<<RS485_CONTROL0_IONUM); //set high
#endif
#ifdef USART0_USE_SOFT_CTS
if(!(CTS0_PIN & (1<<CTS0_IONUM)))
#endif
{
UCSR0B_REGISTER |= (1<<UDRIE0_BIT); // enable UDRE interrupt
}
}
return COMPLETED;
}
#else //!USART_NO_ABI_BREAKING_PREMATURES
uint8_t uart0_putc_noblock(char data)
{
#ifdef USART0_PUTC_FAST_INSERTIONS
register uint8_t tmp_tx_Head = tx0_Head;
register uint8_t tmp_tx_Tail = tx0_Tail;
#ifdef USART0_USE_SOFT_CTS
if(!(CTS0_PIN & (1<<CTS0_IONUM)))
#endif
if(tmp_tx_Tail == tmp_tx_Head && (UCSR0A_REGISTER & UDRE0_BIT))
{
UDR0_REGISTER = data;
return COMPLETED;
}
tmp_tx_Head = (tmp_tx_Head + 1) & TX0_BUFFER_MASK;
if(tmp_tx_Tail == tmp_tx_Head)
return BUFFER_FULL;
#else
register uint8_t tmp_tx_Head = (tx0_Head + 1) & TX0_BUFFER_MASK; // calculate new position of TX head in buffer
if(tx0_Tail == tmp_tx_Head)
return BUFFER_FULL;
#endif
asm volatile("\n\t"
"mov r26, %[index] \n\t"
#if !defined(__AVR_ATtiny2313__)&&!defined(__AVR_ATtiny2313A__) // on ATtiny2313 upper byte in pointer pair is ignored
"ldi r27, 0x00 \n\t"
#endif
"subi r26, lo8(-(tx0_buffer)) \n\t"
#ifndef USART_USE_TINY_MEMORY_MODEL
"sbci r27, hi8(-(tx0_buffer)) \n\t"
#endif
"st X, %[dat] \n\t"
: // outputs
[index] "+r" (tmp_tx_Head), // will be used later, do not let the compiler to do anything weird
[dat] "+r" (data) // not modified, so reduce register moves if inlined
: // inputs
: // clobbers
#if !defined(__AVR_ATtiny2313__)&&!defined(__AVR_ATtiny2313A__)
"r27",
#endif
"r26"
);
ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
{
tx0_Head = tmp_tx_Head;
#ifdef USART0_RS485_MODE
RS485_CONTROL0_PORT |= (1<<RS485_CONTROL0_IONUM); // start transmitting
#endif
#ifdef USART0_USE_SOFT_CTS
if(!(CTS0_PIN & (1<<CTS0_IONUM)))
#endif
{
UCSR0B_REGISTER |= (1<<UDRIE0_BIT); // enable UDRE interrupt
}
}
return COMPLETED;
}
#endif
//******************************************************************
//Function : Send string array.
//Arguments : Pointer to string array terminated by NULL.
//Return : none
//******************************************************************
#ifdef USART_NO_ABI_BREAKING_PREMATURES
void uart0_putstr(char *string)
{
char c;
while ((c = *string++)) uart0_putc(c);
}
#else // !USART_NO_ABI_BREAKING_PREMATURES
void uart0_putstr(char *string)
{
asm volatile("\n\t"
"load_loop_%=:"
"ld r24, Z+ \n\t"
"and r24, r24 \n\t" // test for NULL
"breq skip_loop_%= \n\t"
"rcall uart0_putc \n\t" // Z pointer will not be affected in uart_putc()
"rjmp load_loop_%= \n\t"
"skip_loop_%=:"
: // outputs
: // inputs
"z" (string)
: // clobbers
"r24",
"r25","r26","r27" // uart_putc()
);
}
#endif // USART_NO_ABI_BREAKING_PREMATURES
//******************************************************************
//Function : Send string not terminated by NULL or part of the string array.
//Arguments : 1. Pointer to string array.
// : 2. Number of characters/bytes to send.
//Return : none
//******************************************************************
#ifdef USART_NO_ABI_BREAKING_PREMATURES
void uart0_putstrl(char *string, uint8_t BytesToWrite)
{
while(BytesToWrite--)
uart0_putc(*string++);
}
#else // !USART_NO_ABI_BREAKING_PREMATURES
void uart0_putstrl(char *string, uint8_t BytesToWrite)
{
asm volatile("\n\t"
"add %[counter], r30 \n\t" // add ZL to a counter to compare against current pointer (8 bit length, doesn't care if overflow)
"load_loop_%=:"
"cp %[counter], r30\n\t"
"breq skip_loop_%= \n\t"
"ld r24, Z+ \n\t"
"rcall uart0_putc \n\t" // counter and Z pointer will not be affected in uart_putc()
"rjmp load_loop_%= \n\t"
"skip_loop_%=:"
: // outputs
: // inputs
[counter] "r" (BytesToWrite),
"z" (string)
: // clobbers
"r24",
"r25","r26","r27" // uart_putc()
);
}
#endif // USART_NO_ABI_BREAKING_PREMATURES
//******************************************************************
//Function : Send string from flash memory.
//Arguments : Pointer to string placed in flash memory.
//Return : none
//******************************************************************
#ifdef USART_NO_ABI_BREAKING_PREMATURES
void uart0_puts_p(const __flash char *string)
{
#ifndef USART0_NOT_ACCESIBLE_FROM_CBI // tiny 102/104
register char c;
while ( (c = *string++) ) uart0_putc(c);
#endif
}
#else // !USART_NO_ABI_BREAKING_PREMATURES
void uart0_puts_p(const __flash char *string)
{
#if !defined(__AVR_ATtiny102__)||!defined(__AVR_ATtiny104__)
asm volatile("\n\t"
"load_loop_%=:"
"lpm r24, Z+ \n\t"
"and r24, r24 \n\t" // test for NULL
"breq skip_loop_%= \n\t"
"rcall uart0_putc \n\t" // Z pointer will not be affected in uart_putc()
"rjmp load_loop_%= \n\t"
"skip_loop_%=:"
: // outputs
: // inputs
"z" (string)
: // clobbers
"r24",
"r25","r26","r27" // uart_putc()
);
#endif
}
#endif // USART_NO_ABI_BREAKING_PREMATURES
//******************************************************************
//Function : Send integer formated into ASCI string (base 10).
//Arguments : int16_t data value.
//Return : none
//******************************************************************
void uart0_putint(int16_t data)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[7]; // heading, 5 digit bytes, NULL
#endif
itoa(data, u_tmp_buff, 10);
uart0_putstr(u_tmp_buff);
}
//******************************************************************
//Function : Send integer formated into ASCI string.
//Arguments : 1. uint16_t data value.
// : 2. Base value (DEC, HEX, OCT, BIN, etc.).
//Return : none
//******************************************************************
void uart0_putintr(int16_t data, uint8_t radix)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[17]; // heading, 15 digit bytes, NULL
#endif
itoa(data, u_tmp_buff, radix);
uart0_putstr(u_tmp_buff);
}
//******************************************************************
//Function : Send unsigned integer formated into ASCI string (base 10).
//Arguments : uint16_t data value.
//Return : none
//******************************************************************
void uart0_putuint(uint16_t data)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[7]; // heading, 5 digit bytes, NULL
#endif
utoa(data, u_tmp_buff, 10);
uart0_putstr(u_tmp_buff);
}
//******************************************************************
//Function : Send unsigned integer formated into ASCI string.
//Arguments : 1. uint16_t data value.
// : 2. Base value (DEC, HEX, OCT, BIN, etc.).
//Return : none
//******************************************************************
void uart0_putuintr(uint16_t data, uint8_t radix)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[17]; // heading, 15 digit bytes, NULL
#endif
utoa(data, u_tmp_buff, radix);
uart0_putstr(u_tmp_buff);
}
//******************************************************************
//Function : Send unsigned integer formated into ASCI string (base 16)
//Arguments : uint16_t data value.
//Return : none
//******************************************************************
void uart0_puthex(uint8_t data)
{
uint8_t tmp;
tmp = (data >> 4) & 0x0f;
#ifdef USART_PUTHEX_IN_UPPERCASE
uart0_putc( (tmp <= 9 ? '0' + tmp : 'A' - 10 + tmp));
#else
uart0_putc( (tmp <= 9 ? '0' + tmp : 'a' - 10 + tmp));
#endif
tmp = data & 0x0f;
#ifdef USART_PUTHEX_IN_UPPERCASE
uart0_putc( (tmp <= 9 ? '0' + tmp : 'A' - 10 + tmp));
#else
uart0_putc( (tmp <= 9 ? '0' + tmp : 'a' - 10 + tmp));
#endif
}
//******************************************************************
//Function : Send long integer formated into ASCI string (base 10).
//Arguments : int32_t data value.
//Return : none
//******************************************************************
void uart0_putlong(int32_t data)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[12]; // heading, 10 digit bytes, NULL
#endif
ltoa(data, u_tmp_buff, 10);
uart0_putstr(u_tmp_buff);
}
//******************************************************************
//Function : Send long integer formated into ASCI string.
//Arguments : 1. int32_t data value.
// : 2. Base value (DEC, HEX, OCT, BIN, etc.).
//Return : none
//******************************************************************
void uart0_putlongr(int32_t data, uint8_t radix)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[17]; // heading, 15 digit bytes, NULL
#endif
ltoa(data, u_tmp_buff, radix);
uart0_putstr(u_tmp_buff);
}
//******************************************************************
//Function : Send unsigned long integer formated into ASCI string (base 10).
//Arguments : uint32_t data value.
//Return : none
//******************************************************************
void uart0_putulong(uint32_t data)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[12]; // heading, 10 digit bytes, NULL
#endif
ultoa(data, u_tmp_buff, 10);
uart0_putstr(u_tmp_buff);
}
//******************************************************************
//Function : Send unsigned long integer formated into ASCI string.
//Arguments : 1. uint32_t data value.
// : 2. Base value (DEC, HEX, OCT, BIN, etc.).
//Return : none
//******************************************************************
void uart0_putulongr(uint32_t data, uint8_t radix)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[17]; // heading, 15 digit bytes, NULL
#endif
ultoa(data, u_tmp_buff, radix);
uart0_putstr(u_tmp_buff);
}
//******************************************************************
//Function : Send floating point value formated into ASCI string.
//Arguments : float data value.
//Return : none
//******************************************************************
void uart0_putfloat(float data)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[16];
#endif
dtostrf(data, 15, 6, u_tmp_buff);
char *p = u_tmp_buff;
while(*p == ' ') // remove all unwanted spaces
p++;
uart0_putstr(p);
}
//******************************************************************
//Function : Send floating point integer formated into ASCI string.
//Arguments : 1. Float data value.
// : 2. Number of displayed digits after the dot.
//Return : none
//******************************************************************
void uart0_fputfloat(float data, uint8_t precision)
{
#ifndef USART_NO_LOCAL_BUFFERS
char u_tmp_buff[16];
#endif
dtostrf(data, 15, precision, u_tmp_buff);
char *p = u_tmp_buff;
while(*p == ' ') // remove all unwanted spaces
p++;
uart0_putstr(p);
}
//******************************************************************
//Function : Wait until all data in TX buffer are flushed.
//Arguments : none
//Return : none
//******************************************************************
void uart0_flush(void)
{
#ifdef USART0_RS485_MODE // flush UDR buffer
while (RS485_CONTROL0_PORT & (1<<RS485_CONTROL0_IONUM));
#else
while(tx0_Tail != tx0_Head); // just flush the ring buffer
#endif
}
//******************************************************************
//Function : To check how many bytes are waiting in the transmitter buffer.
//Arguments : none
//Return : Number of bytes waiting in transmitter buffer.
//******************************************************************
//uint8_t uart0_BytesToSend(void)
// {
// return (tx0_Head - tx0_Tail) & TX0_BUFFER_MASK;
// }
//******************************************************************
//Function : Transmit address of selected slave in MPCM mode.
//Arguments : Address of selected slave.
//Return : none
//******************************************************************
#ifdef USART0_MPCM_MODE
void uart0_mpcm_transmit_addres_Frame(uint8_t dat)
{
while(tx0_Tail != tx0_Head);
UCSR0B_REGISTER |= (1<<TXB80_BIT);
uart_putc(dat);
while(tx0_Tail != tx0_Head);
UCSR0B_REGISTER &= ~(1<<TXB80_BIT); // not sure if necessary
}
#endif
#endif // NO_TX0_INTERRUPT
#ifndef NO_TX1_INTERRUPT
#ifdef USART_NO_ABI_BREAKING_PREMATURES
void uart1_putc(char data)
{
#ifdef PUTC1_CONVERT_LF_TO_CRLF
if (data == '\n')
uart1_putc('\r');
#endif
#ifdef USART1_PUTC_FAST_INSERTIONS
register uint8_t tmp_tx_Head = tx1_Head;
register uint8_t tmp_tx_Tail = tx1_Tail;
#ifdef USART1_USE_SOFT_CTS
if(!(CTS1_PIN & (1<<CTS1_IONUM)))
#endif
if(tmp_tx_Tail == tmp_tx_Head && (UCSR1A_REGISTER & UDRE1_BIT))
{
UDR1_REGISTER = data;
return;
}
tmp_tx_Head = (tmp_tx_Head + 1) & TX1_BUFFER_MASK;
while(tmp_tx_Tail == tmp_tx_Head) // wait for free space in buffer
{
tmp_tx_Tail = tx1_Tail; // for faster pass through, results in a little bigger code
}
#else
register uint8_t tmp_tx_Head = (tx1_Head + 1) & TX1_BUFFER_MASK; // calculate new position of TX head in buffer
while(tx1_Tail == tmp_tx_Head); // wait for free space in buffer
#endif
tx1_buffer[tmp_tx_Head] = data;
ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
{
tx1_Head = tmp_tx_Head;
#ifdef USART1_RS485_MODE
RS485_CONTROL1_PORT |= (1<<RS485_CONTROL1_IONUM); //set high
#endif
#ifdef USART1_USE_SOFT_CTS
if(!(CTS1_PIN & (1<<CTS1_IONUM)))
#endif
{
UCSR1B_REGISTER |= (1<<UDRIE1_BIT); // enable UDRE interrupt
}
}
}
#else // !USART_NO_ABI_BREAKING_PREMATURES
void uart1_putc(char data)
{
register uint8_t tmp_tx_Head asm("r25");
#ifdef PUTC1_CONVERT_LF_TO_CRLF
asm volatile("\n\t"