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serialX buffersizes 

Additional PR for SERIALX_DISABLE follows
teensy4-core
Frank Bösing 8 년 전
부모
0b16dad9eb
커밋
6dd6073c2c
8개의 변경된 파일과 171개의 추가작업 그리고 139개의 파일을 삭제
분할 보기 변경상태 보기
  1. +24
    -20
      teensy3/serial1.c
  2. +23
    -19
      teensy3/serial1_doughboy.txt
  3. +24
    -20
      teensy3/serial2.c
  4. +20
    -16
      teensy3/serial3.c
  5. +20
    -16
      teensy3/serial4.c
  6. +20
    -16
      teensy3/serial5.c
  7. +20
    -16
      teensy3/serial6.c
  8. +20
    -16
      teensy3/serial6_lpuart.c

+ 24
- 20
teensy3/serial1.c 파일 보기

@@ -36,8 +36,12 @@
// Tunable parameters (relatively safe to edit these numbers)
////////////////////////////////////////////////////////////////

#define TX_BUFFER_SIZE 64 // number of outgoing bytes to buffer
#define RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#ifndef SERIAL1_TX_BUFFER_SIZE
#define SERIAL1_TX_BUFFER_SIZE 64 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL1_RX_BUFFER_SIZE
#define SERIAL1_RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#endif
#define RTS_HIGH_WATERMARK 40 // RTS requests sender to pause
#define RTS_LOW_WATERMARK 26 // RTS allows sender to resume
#define IRQ_PRIORITY 64 // 0 = highest priority, 255 = lowest
@@ -55,8 +59,8 @@ static uint8_t use9Bits = 0;
#define use9Bits 0
#endif

static volatile BUFTYPE tx_buffer[TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[RX_BUFFER_SIZE];
static volatile BUFTYPE tx_buffer[SERIAL1_TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[SERIAL1_RX_BUFFER_SIZE];
static volatile uint8_t transmitting = 0;
#if defined(KINETISK)
static volatile uint8_t *transmit_pin=NULL;
@@ -75,14 +79,14 @@ static volatile uint8_t transmitting = 0;
#define rts_assert() *(rts_pin+8) = rts_mask;
#define rts_deassert() *(rts_pin+4) = rts_mask;
#endif
#if TX_BUFFER_SIZE > 255
#if SERIAL1_TX_BUFFER_SIZE > 255
static volatile uint16_t tx_buffer_head = 0;
static volatile uint16_t tx_buffer_tail = 0;
#else
static volatile uint8_t tx_buffer_head = 0;
static volatile uint8_t tx_buffer_tail = 0;
#endif
#if RX_BUFFER_SIZE > 255
#if SERIAL1_RX_BUFFER_SIZE > 255
static volatile uint16_t rx_buffer_head = 0;
static volatile uint16_t rx_buffer_tail = 0;
#else
@@ -334,13 +338,13 @@ void serial_putchar(uint32_t c)
if (!(SIM_SCGC4 & SIM_SCGC4_UART0)) return;
if (transmit_pin) transmit_assert();
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL1_TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) {
int priority = nvic_execution_priority();
if (priority <= IRQ_PRIORITY) {
if ((UART0_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART0_C3 = (UART0_C3 & ~0x40) | ((n & 0x100) >> 2);
UART0_D = n;
@@ -367,7 +371,7 @@ void serial_write(const void *buf, unsigned int count)
if (transmit_pin) transmit_assert();
while (p < end) {
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL1_TX_BUFFER_SIZE) head = 0;
if (tx_buffer_tail == head) {
UART0_C2 = C2_TX_ACTIVE;
do {
@@ -375,7 +379,7 @@ void serial_write(const void *buf, unsigned int count)
if (priority <= IRQ_PRIORITY) {
if ((UART0_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART0_C3 = (UART0_C3 & ~0x40) | ((n & 0x100) >> 2);
UART0_D = n;
@@ -411,7 +415,7 @@ int serial_write_buffer_free(void)

head = tx_buffer_head;
tail = tx_buffer_tail;
if (head >= tail) return TX_BUFFER_SIZE - 1 - head + tail;
if (head >= tail) return SERIAL1_TX_BUFFER_SIZE - 1 - head + tail;
return tail - head - 1;
}

@@ -422,7 +426,7 @@ int serial_available(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
return SERIAL1_RX_BUFFER_SIZE + head - tail;
}

int serial_getchar(void)
@@ -433,13 +437,13 @@ int serial_getchar(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_RX_BUFFER_SIZE) tail = 0;
c = rx_buffer[tail];
rx_buffer_tail = tail;
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL1_RX_BUFFER_SIZE + head - tail;
if (avail <= RTS_LOW_WATERMARK) rts_assert();
}
return c;
@@ -452,7 +456,7 @@ int serial_peek(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}

@@ -517,7 +521,7 @@ void uart0_status_isr(void)
n = UART0_D;
}
newhead = head + 1;
if (newhead >= RX_BUFFER_SIZE) newhead = 0;
if (newhead >= SERIAL1_RX_BUFFER_SIZE) newhead = 0;
if (newhead != tail) {
head = newhead;
rx_buffer[head] = n;
@@ -527,7 +531,7 @@ void uart0_status_isr(void)
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL1_RX_BUFFER_SIZE + head - tail;
if (avail >= RTS_HIGH_WATERMARK) rts_deassert();
}
}
@@ -538,7 +542,7 @@ void uart0_status_isr(void)
tail = tx_buffer_tail;
do {
if (tail == head) break;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_TX_BUFFER_SIZE) tail = 0;
avail = UART0_S1;
n = tx_buffer[tail];
if (use9Bits) UART0_C3 = (UART0_C3 & ~0x40) | ((n & 0x100) >> 2);
@@ -552,7 +556,7 @@ void uart0_status_isr(void)
n = UART0_D;
if (use9Bits && (UART0_C3 & 0x80)) n |= 0x100;
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head >= SERIAL1_RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = n;
rx_buffer_head = head;
@@ -565,7 +569,7 @@ void uart0_status_isr(void)
if (head == tail) {
UART0_C2 = C2_TX_COMPLETING;
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART0_C3 = (UART0_C3 & ~0x40) | ((n & 0x100) >> 2);
UART0_D = n;

+ 23
- 19
teensy3/serial1_doughboy.txt 파일 보기

@@ -40,8 +40,12 @@
// Tunable parameters (relatively safe to edit these numbers)
////////////////////////////////////////////////////////////////

#define TX_BUFFER_SIZE 64 // number of outgoing bytes to buffer
#define RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#ifndef SERIAL1_TX_BUFFER_SIZE
#define SERIAL1_TX_BUFFER_SIZE 64 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL1_RX_BUFFER_SIZE
#define SERIAL1_RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#endif
#define IRQ_PRIORITY 64 // 0 = highest priority, 255 = lowest


@@ -57,8 +61,8 @@ static uint8_t use9Bits = 0;
#define use9Bits 0
#endif

static volatile BUFTYPE tx_buffer[TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[RX_BUFFER_SIZE];
static volatile BUFTYPE tx_buffer[SERIAL1_TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[SERIAL1_RX_BUFFER_SIZE];
static volatile uint8_t transmitting = 0;
#if defined(KINETISK)
static volatile uint8_t *transmit_pin=NULL;
@@ -70,14 +74,14 @@ static volatile uint8_t transmitting = 0;
#define transmit_assert() *(transmit_pin+4) = transmit_mask;
#define transmit_deassert() *(transmit_pin+8) = transmit_mask;
#endif
#if TX_BUFFER_SIZE > 255
#if SERIAL1_TX_BUFFER_SIZE > 255
static volatile uint16_t tx_buffer_head = 0;
static volatile uint16_t tx_buffer_tail = 0;
#else
static volatile uint8_t tx_buffer_head = 0;
static volatile uint8_t tx_buffer_tail = 0;
#endif
#if RX_BUFFER_SIZE > 255
#if SERIAL1_RX_BUFFER_SIZE > 255
static volatile uint16_t rx_buffer_head = 0;
static volatile uint16_t rx_buffer_tail = 0;
#else
@@ -204,13 +208,13 @@ void serial_putchar(uint32_t c)
if (!(SIM_SCGC4 & SIM_SCGC4_UART0)) return;
if (transmit_pin) transmit_assert();
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL1_TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) {
int priority = nvic_execution_priority();
if (priority <= IRQ_PRIORITY) {
if ((UART0_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART0_C3 = (UART0_C3 & ~0x40) | ((n & 0x100) >> 2);
UART0_D = n;
@@ -238,7 +242,7 @@ void serial_write(const void *buf, unsigned int count)
if (transmit_pin) transmit_assert();
while (p < end) {
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL1_TX_BUFFER_SIZE) head = 0;
if (tx_buffer_tail == head) {
UART0_C2 |= UART_C2_TIE;
UART0_C2 &= ~UART_C2_TCIE;
@@ -247,7 +251,7 @@ void serial_write(const void *buf, unsigned int count)
if (priority <= IRQ_PRIORITY) {
if ((UART0_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART0_C3 = (UART0_C3 & ~0x40) | ((n & 0x100) >> 2);
UART0_D = n;
@@ -284,7 +288,7 @@ int serial_write_buffer_free(void)

head = tx_buffer_head;
tail = tx_buffer_tail;
if (head >= tail) return TX_BUFFER_SIZE - 1 - head + tail;
if (head >= tail) return SERIAL1_TX_BUFFER_SIZE - 1 - head + tail;
return tail - head - 1;
}

@@ -295,7 +299,7 @@ int serial_available(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
return SERIAL1_RX_BUFFER_SIZE + head - tail;
}

int serial_getchar(void)
@@ -306,14 +310,14 @@ int serial_getchar(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_RX_BUFFER_SIZE) tail = 0;
c = rx_buffer[tail];
rx_buffer_tail = tail;
#ifdef HAS_KINETISK_UART0_FIFO
if ((UART0_C2 & (UART_C2_RIE | UART_C2_ILIE))==0) {//rx interrupt currently disabled
int freespace;
if (head >= tail) //rx head and tail would be unchanged from above if interrupts were disabled
freespace = RX_BUFFER_SIZE -1 + tail - head;
freespace = SERIAL1_RX_BUFFER_SIZE -1 + tail - head;
else
freespace = tail - head - 1;
if (freespace >= UART0_RCFIFO) {
@@ -333,7 +337,7 @@ int serial_peek(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}

@@ -389,7 +393,7 @@ void uart0_status_isr(void)
tail = rx_buffer_tail;
do {
newhead = head + 1;
if (newhead >= RX_BUFFER_SIZE) newhead = 0;
if (newhead >= SERIAL1_RX_BUFFER_SIZE) newhead = 0;
if (UART0_MODEM & UART_MODEM_RXRTSE) {
if (newhead == tail) {
UART0_C2 &= ~(UART_C2_RIE | UART_C2_ILIE);//disable rx interrupts
@@ -414,7 +418,7 @@ void uart0_status_isr(void)
tail = tx_buffer_tail;
do {
if (tail == head) break;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_TX_BUFFER_SIZE) tail = 0;
UART0_S1;
n = tx_buffer[tail];
if (use9Bits) UART0_C3 = (UART0_C3 & ~0x40) | ((n & 0x100) >> 2);
@@ -430,7 +434,7 @@ void uart0_status_isr(void)
if (UART0_S1 & UART_S1_RDRF) {
do {
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head >= SERIAL1_RX_BUFFER_SIZE) head = 0;
if (UART0_MODEM & UART_MODEM_RXRTSE) {
if (head == rx_buffer_tail) {
UART0_C2 &= ~(UART_C2_RIE);//disable rx interrupts
@@ -452,7 +456,7 @@ void uart0_status_isr(void)
UART0_C2 |= UART_C2_TCIE;
UART0_C2 &= ~UART_C2_TIE;
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL1_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART0_C3 = (UART0_C3 & ~0x40) | ((n & 0x100) >> 2);
UART0_D = n;

+ 24
- 20
teensy3/serial2.c 파일 보기

@@ -36,8 +36,12 @@
// Tunable parameters (relatively safe to edit these numbers)
////////////////////////////////////////////////////////////////

#define TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#define RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#ifndef SERIAL2_TX_BUFFER_SIZE
#define SERIAL2_TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL2_RX_BUFFER_SIZE
#define SERIAL2_RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#endif
#define RTS_HIGH_WATERMARK 40 // RTS requests sender to pause
#define RTS_LOW_WATERMARK 26 // RTS allows sender to resume
#define IRQ_PRIORITY 64 // 0 = highest priority, 255 = lowest
@@ -54,8 +58,8 @@ static uint8_t use9Bits = 0;
#define use9Bits 0
#endif

static volatile BUFTYPE tx_buffer[TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[RX_BUFFER_SIZE];
static volatile BUFTYPE tx_buffer[SERIAL2_TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[SERIAL2_RX_BUFFER_SIZE];
static volatile uint8_t transmitting = 0;
#if defined(KINETISK)
static volatile uint8_t *transmit_pin=NULL;
@@ -74,14 +78,14 @@ static volatile uint8_t transmitting = 0;
#define rts_assert() *(rts_pin+8) = rts_mask;
#define rts_deassert() *(rts_pin+4) = rts_mask;
#endif
#if TX_BUFFER_SIZE > 255
#if SERIAL2_TX_BUFFER_SIZE > 255
static volatile uint16_t tx_buffer_head = 0;
static volatile uint16_t tx_buffer_tail = 0;
#else
static volatile uint8_t tx_buffer_head = 0;
static volatile uint8_t tx_buffer_tail = 0;
#endif
#if RX_BUFFER_SIZE > 255
#if SERIAL2_RX_BUFFER_SIZE > 255
static volatile uint16_t rx_buffer_head = 0;
static volatile uint16_t rx_buffer_tail = 0;
#else
@@ -344,13 +348,13 @@ void serial2_putchar(uint32_t c)
if (!(SIM_SCGC4 & SIM_SCGC4_UART1)) return;
if (transmit_pin) transmit_assert();
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL2_TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) {
int priority = nvic_execution_priority();
if (priority <= IRQ_PRIORITY) {
if ((UART1_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL2_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART1_C3 = (UART1_C3 & ~0x40) | ((n & 0x100) >> 2);
UART1_D = n;
@@ -377,7 +381,7 @@ void serial2_write(const void *buf, unsigned int count)
if (transmit_pin) transmit_assert();
while (p < end) {
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL2_TX_BUFFER_SIZE) head = 0;
if (tx_buffer_tail == head) {
UART1_C2 = C2_TX_ACTIVE;
do {
@@ -385,7 +389,7 @@ void serial2_write(const void *buf, unsigned int count)
if (priority <= IRQ_PRIORITY) {
if ((UART1_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL2_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART1_C3 = (UART1_C3 & ~0x40) | ((n & 0x100) >> 2);
UART1_D = n;
@@ -421,7 +425,7 @@ int serial2_write_buffer_free(void)

head = tx_buffer_head;
tail = tx_buffer_tail;
if (head >= tail) return TX_BUFFER_SIZE - 1 - head + tail;
if (head >= tail) return SERIAL2_TX_BUFFER_SIZE - 1 - head + tail;
return tail - head - 1;
}

@@ -432,7 +436,7 @@ int serial2_available(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
return SERIAL2_RX_BUFFER_SIZE + head - tail;
}

int serial2_getchar(void)
@@ -443,13 +447,13 @@ int serial2_getchar(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL2_RX_BUFFER_SIZE) tail = 0;
c = rx_buffer[tail];
rx_buffer_tail = tail;
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL2_RX_BUFFER_SIZE + head - tail;
if (avail <= RTS_LOW_WATERMARK) rts_assert();
}
return c;
@@ -462,7 +466,7 @@ int serial2_peek(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL2_RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}

@@ -527,7 +531,7 @@ void uart1_status_isr(void)
n = UART1_D;
}
newhead = head + 1;
if (newhead >= RX_BUFFER_SIZE) newhead = 0;
if (newhead >= SERIAL2_RX_BUFFER_SIZE) newhead = 0;
if (newhead != tail) {
head = newhead;
rx_buffer[head] = n;
@@ -537,7 +541,7 @@ void uart1_status_isr(void)
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL2_RX_BUFFER_SIZE + head - tail;
if (avail >= RTS_HIGH_WATERMARK) rts_deassert();
}
}
@@ -548,7 +552,7 @@ void uart1_status_isr(void)
tail = tx_buffer_tail;
do {
if (tail == head) break;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL2_TX_BUFFER_SIZE) tail = 0;
avail = UART1_S1;
n = tx_buffer[tail];
if (use9Bits) UART1_C3 = (UART1_C3 & ~0x40) | ((n & 0x100) >> 2);
@@ -562,7 +566,7 @@ void uart1_status_isr(void)
n = UART1_D;
if (use9Bits && (UART1_C3 & 0x80)) n |= 0x100;
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head >= SERIAL2_RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = n;
rx_buffer_head = head;
@@ -575,7 +579,7 @@ void uart1_status_isr(void)
if (head == tail) {
UART1_C2 = C2_TX_COMPLETING;
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL2_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART1_C3 = (UART1_C3 & ~0x40) | ((n & 0x100) >> 2);
UART1_D = n;

+ 20
- 16
teensy3/serial3.c 파일 보기

@@ -36,8 +36,12 @@
// Tunable parameters (relatively safe to edit these numbers)
////////////////////////////////////////////////////////////////

#define TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#define RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#ifndef SERIAL3_TX_BUFFER_SIZE
#define SERIAL3_TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL3_RX_BUFFER_SIZE
#define SERIAL3_RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#endif
#define RTS_HIGH_WATERMARK 40 // RTS requests sender to pause
#define RTS_LOW_WATERMARK 26 // RTS allows sender to resume
#define IRQ_PRIORITY 64 // 0 = highest priority, 255 = lowest
@@ -55,8 +59,8 @@ static uint8_t use9Bits = 0;
#define use9Bits 0
#endif

static volatile BUFTYPE tx_buffer[TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[RX_BUFFER_SIZE];
static volatile BUFTYPE tx_buffer[SERIAL3_TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[SERIAL3_RX_BUFFER_SIZE];
static volatile uint8_t transmitting = 0;
#if defined(KINETISK)
static volatile uint8_t *transmit_pin=NULL;
@@ -75,14 +79,14 @@ static volatile uint8_t transmitting = 0;
#define rts_assert() *(rts_pin+8) = rts_mask;
#define rts_deassert() *(rts_pin+4) = rts_mask;
#endif
#if TX_BUFFER_SIZE > 255
#if SERIAL3_TX_BUFFER_SIZE > 255
static volatile uint16_t tx_buffer_head = 0;
static volatile uint16_t tx_buffer_tail = 0;
#else
static volatile uint8_t tx_buffer_head = 0;
static volatile uint8_t tx_buffer_tail = 0;
#endif
#if RX_BUFFER_SIZE > 255
#if SERIAL3_RX_BUFFER_SIZE > 255
static volatile uint16_t rx_buffer_head = 0;
static volatile uint16_t rx_buffer_tail = 0;
#else
@@ -291,13 +295,13 @@ void serial3_putchar(uint32_t c)
if (!(SIM_SCGC4 & SIM_SCGC4_UART2)) return;
if (transmit_pin) transmit_assert();
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL3_TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) {
int priority = nvic_execution_priority();
if (priority <= IRQ_PRIORITY) {
if ((UART2_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL3_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART2_C3 = (UART2_C3 & ~0x40) | ((n & 0x100) >> 2);
UART2_D = n;
@@ -330,7 +334,7 @@ int serial3_write_buffer_free(void)

head = tx_buffer_head;
tail = tx_buffer_tail;
if (head >= tail) return TX_BUFFER_SIZE - 1 - head + tail;
if (head >= tail) return SERIAL3_TX_BUFFER_SIZE - 1 - head + tail;
return tail - head - 1;
}

@@ -341,7 +345,7 @@ int serial3_available(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
return SERIAL3_RX_BUFFER_SIZE + head - tail;
}

int serial3_getchar(void)
@@ -352,13 +356,13 @@ int serial3_getchar(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL3_RX_BUFFER_SIZE) tail = 0;
c = rx_buffer[tail];
rx_buffer_tail = tail;
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL3_RX_BUFFER_SIZE + head - tail;
if (avail <= RTS_LOW_WATERMARK) rts_assert();
}
return c;
@@ -371,7 +375,7 @@ int serial3_peek(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL3_RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}

@@ -401,7 +405,7 @@ void uart2_status_isr(void)
n = UART2_D;
}
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head >= SERIAL3_RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = n;
rx_buffer_head = head;
@@ -410,7 +414,7 @@ void uart2_status_isr(void)
int avail;
tail = tx_buffer_tail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL3_RX_BUFFER_SIZE + head - tail;
if (avail >= RTS_HIGH_WATERMARK) rts_deassert();
}
}
@@ -421,7 +425,7 @@ void uart2_status_isr(void)
if (head == tail) {
UART2_C2 = C2_TX_COMPLETING;
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL3_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART2_C3 = (UART2_C3 & ~0x40) | ((n & 0x100) >> 2);
UART2_D = n;

+ 20
- 16
teensy3/serial4.c 파일 보기

@@ -38,8 +38,12 @@
// Tunable parameters (relatively safe to edit these numbers)
////////////////////////////////////////////////////////////////

#define TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#define RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#ifndef SERIAL4_TX_BUFFER_SIZE
#define SERIAL4_TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL4_RX_BUFFER_SIZE
#define SERIAL4_RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#endif
#define RTS_HIGH_WATERMARK 40 // RTS requests sender to pause
#define RTS_LOW_WATERMARK 26 // RTS allows sender to resume
#define IRQ_PRIORITY 64 // 0 = highest priority, 255 = lowest
@@ -57,8 +61,8 @@ static uint8_t use9Bits = 0;
#define use9Bits 0
#endif

static volatile BUFTYPE tx_buffer[TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[RX_BUFFER_SIZE];
static volatile BUFTYPE tx_buffer[SERIAL4_TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[SERIAL4_RX_BUFFER_SIZE];
static volatile uint8_t transmitting = 0;
static volatile uint8_t *transmit_pin=NULL;
#define transmit_assert() *transmit_pin = 1
@@ -66,14 +70,14 @@ static volatile uint8_t *transmit_pin=NULL;
static volatile uint8_t *rts_pin=NULL;
#define rts_assert() *rts_pin = 0
#define rts_deassert() *rts_pin = 1
#if TX_BUFFER_SIZE > 255
#if SERIAL4_TX_BUFFER_SIZE > 255
static volatile uint16_t tx_buffer_head = 0;
static volatile uint16_t tx_buffer_tail = 0;
#else
static volatile uint8_t tx_buffer_head = 0;
static volatile uint8_t tx_buffer_tail = 0;
#endif
#if RX_BUFFER_SIZE > 255
#if SERIAL4_RX_BUFFER_SIZE > 255
static volatile uint16_t rx_buffer_head = 0;
static volatile uint16_t rx_buffer_tail = 0;
#else
@@ -245,13 +249,13 @@ void serial4_putchar(uint32_t c)
if (!(SIM_SCGC4 & SIM_SCGC4_UART3)) return;
if (transmit_pin) transmit_assert();
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL4_TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) {
int priority = nvic_execution_priority();
if (priority <= IRQ_PRIORITY) {
if ((UART3_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL4_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART3_C3 = (UART3_C3 & ~0x40) | ((n & 0x100) >> 2);
UART3_D = n;
@@ -284,7 +288,7 @@ int serial4_write_buffer_free(void)

head = tx_buffer_head;
tail = tx_buffer_tail;
if (head >= tail) return TX_BUFFER_SIZE - 1 - head + tail;
if (head >= tail) return SERIAL4_TX_BUFFER_SIZE - 1 - head + tail;
return tail - head - 1;
}

@@ -295,7 +299,7 @@ int serial4_available(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
return SERIAL4_RX_BUFFER_SIZE + head - tail;
}

int serial4_getchar(void)
@@ -306,13 +310,13 @@ int serial4_getchar(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL4_RX_BUFFER_SIZE) tail = 0;
c = rx_buffer[tail];
rx_buffer_tail = tail;
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL4_RX_BUFFER_SIZE + head - tail;
if (avail <= RTS_LOW_WATERMARK) rts_assert();
}
return c;
@@ -325,7 +329,7 @@ int serial4_peek(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL4_RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}

@@ -355,7 +359,7 @@ void uart3_status_isr(void)
n = UART3_D;
}
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head >= SERIAL4_RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = n;
rx_buffer_head = head;
@@ -364,7 +368,7 @@ void uart3_status_isr(void)
int avail;
tail = tx_buffer_tail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL4_RX_BUFFER_SIZE + head - tail;
if (avail >= RTS_HIGH_WATERMARK) rts_deassert();
}
}
@@ -375,7 +379,7 @@ void uart3_status_isr(void)
if (head == tail) {
UART3_C2 = C2_TX_COMPLETING;
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL4_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART3_C3 = (UART3_C3 & ~0x40) | ((n & 0x100) >> 2);
UART3_D = n;

+ 20
- 16
teensy3/serial5.c 파일 보기

@@ -38,8 +38,12 @@
// Tunable parameters (relatively safe to edit these numbers)
////////////////////////////////////////////////////////////////

#define TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#define RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#ifndef SERIAL5_TX_BUFFER_SIZE
#define SERIAL5_TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL5_RX_BUFFER_SIZE
#define SERIAL5_RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#endif
#define RTS_HIGH_WATERMARK 40 // RTS requests sender to pause
#define RTS_LOW_WATERMARK 26 // RTS allows sender to resume
#define IRQ_PRIORITY 64 // 0 = highest priority, 255 = lowest
@@ -57,8 +61,8 @@ static uint8_t use9Bits = 0;
#define use9Bits 0
#endif

static volatile BUFTYPE tx_buffer[TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[RX_BUFFER_SIZE];
static volatile BUFTYPE tx_buffer[SERIAL5_TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[SERIAL5_RX_BUFFER_SIZE];
static volatile uint8_t transmitting = 0;
static volatile uint8_t *transmit_pin=NULL;
#define transmit_assert() *transmit_pin = 1
@@ -66,14 +70,14 @@ static volatile uint8_t *transmit_pin=NULL;
static volatile uint8_t *rts_pin=NULL;
#define rts_assert() *rts_pin = 0
#define rts_deassert() *rts_pin = 1
#if TX_BUFFER_SIZE > 255
#if SERIAL5_TX_BUFFER_SIZE > 255
static volatile uint16_t tx_buffer_head = 0;
static volatile uint16_t tx_buffer_tail = 0;
#else
static volatile uint8_t tx_buffer_head = 0;
static volatile uint8_t tx_buffer_tail = 0;
#endif
#if RX_BUFFER_SIZE > 255
#if SERIAL5_RX_BUFFER_SIZE > 255
static volatile uint16_t rx_buffer_head = 0;
static volatile uint16_t rx_buffer_tail = 0;
#else
@@ -221,13 +225,13 @@ void serial5_putchar(uint32_t c)
if (!(SIM_SCGC1 & SIM_SCGC1_UART4)) return;
if (transmit_pin) transmit_assert();
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL5_TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) {
int priority = nvic_execution_priority();
if (priority <= IRQ_PRIORITY) {
if ((UART4_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL5_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART4_C3 = (UART4_C3 & ~0x40) | ((n & 0x100) >> 2);
UART4_D = n;
@@ -260,7 +264,7 @@ int serial5_write_buffer_free(void)

head = tx_buffer_head;
tail = tx_buffer_tail;
if (head >= tail) return TX_BUFFER_SIZE - 1 - head + tail;
if (head >= tail) return SERIAL5_TX_BUFFER_SIZE - 1 - head + tail;
return tail - head - 1;
}

@@ -271,7 +275,7 @@ int serial5_available(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
return SERIAL5_RX_BUFFER_SIZE + head - tail;
}

int serial5_getchar(void)
@@ -282,13 +286,13 @@ int serial5_getchar(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL5_RX_BUFFER_SIZE) tail = 0;
c = rx_buffer[tail];
rx_buffer_tail = tail;
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL5_RX_BUFFER_SIZE + head - tail;
if (avail <= RTS_LOW_WATERMARK) rts_assert();
}
return c;
@@ -301,7 +305,7 @@ int serial5_peek(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL5_RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}

@@ -331,7 +335,7 @@ void uart4_status_isr(void)
n = UART4_D;
}
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head >= SERIAL5_RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = n;
rx_buffer_head = head;
@@ -340,7 +344,7 @@ void uart4_status_isr(void)
int avail;
tail = tx_buffer_tail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL5_RX_BUFFER_SIZE + head - tail;
if (avail >= RTS_HIGH_WATERMARK) rts_deassert();
}
}
@@ -351,7 +355,7 @@ void uart4_status_isr(void)
if (head == tail) {
UART4_C2 = C2_TX_COMPLETING;
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL5_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART4_C3 = (UART4_C3 & ~0x40) | ((n & 0x100) >> 2);
UART4_D = n;

+ 20
- 16
teensy3/serial6.c 파일 보기

@@ -38,8 +38,12 @@
// Tunable parameters (relatively safe to edit these numbers)
////////////////////////////////////////////////////////////////

#define TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#define RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#ifndef SERIAL6_TX_BUFFER_SIZE
#define SERIAL6_TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL6_RX_BUFFER_SIZE
#define SERIAL6_RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#endif
#define RTS_HIGH_WATERMARK 40 // RTS requests sender to pause
#define RTS_LOW_WATERMARK 26 // RTS allows sender to resume
#define IRQ_PRIORITY 64 // 0 = highest priority, 255 = lowest
@@ -57,8 +61,8 @@ static uint8_t use9Bits = 0;
#define use9Bits 0
#endif

static volatile BUFTYPE tx_buffer[TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[RX_BUFFER_SIZE];
static volatile BUFTYPE tx_buffer[SERIAL6_TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[SERIAL6_RX_BUFFER_SIZE];
static volatile uint8_t transmitting = 0;
static volatile uint8_t *transmit_pin=NULL;
#define transmit_assert() *transmit_pin = 1
@@ -66,14 +70,14 @@ static volatile uint8_t *transmit_pin=NULL;
static volatile uint8_t *rts_pin=NULL;
#define rts_assert() *rts_pin = 0
#define rts_deassert() *rts_pin = 1
#if TX_BUFFER_SIZE > 255
#if SERIAL6_TX_BUFFER_SIZE > 255
static volatile uint16_t tx_buffer_head = 0;
static volatile uint16_t tx_buffer_tail = 0;
#else
static volatile uint8_t tx_buffer_head = 0;
static volatile uint8_t tx_buffer_tail = 0;
#endif
#if RX_BUFFER_SIZE > 255
#if SERIAL6_RX_BUFFER_SIZE > 255
static volatile uint16_t rx_buffer_head = 0;
static volatile uint16_t rx_buffer_tail = 0;
#else
@@ -221,13 +225,13 @@ void serial6_putchar(uint32_t c)
if (!(SIM_SCGC1 & SIM_SCGC1_UART5)) return;
if (transmit_pin) transmit_assert();
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL6_TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) {
int priority = nvic_execution_priority();
if (priority <= IRQ_PRIORITY) {
if ((UART5_S1 & UART_S1_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL6_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART5_C3 = (UART5_C3 & ~0x40) | ((n & 0x100) >> 2);
UART5_D = n;
@@ -260,7 +264,7 @@ int serial6_write_buffer_free(void)

head = tx_buffer_head;
tail = tx_buffer_tail;
if (head >= tail) return TX_BUFFER_SIZE - 1 - head + tail;
if (head >= tail) return SERIAL6_TX_BUFFER_SIZE - 1 - head + tail;
return tail - head - 1;
}

@@ -271,7 +275,7 @@ int serial6_available(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
return SERIAL6_RX_BUFFER_SIZE + head - tail;
}

int serial6_getchar(void)
@@ -282,13 +286,13 @@ int serial6_getchar(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL6_RX_BUFFER_SIZE) tail = 0;
c = rx_buffer[tail];
rx_buffer_tail = tail;
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL6_RX_BUFFER_SIZE + head - tail;
if (avail <= RTS_LOW_WATERMARK) rts_assert();
}
return c;
@@ -301,7 +305,7 @@ int serial6_peek(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL6_RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}

@@ -331,7 +335,7 @@ void uart5_status_isr(void)
n = UART5_D;
}
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head >= SERIAL6_RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = n;
rx_buffer_head = head;
@@ -340,7 +344,7 @@ void uart5_status_isr(void)
int avail;
tail = tx_buffer_tail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL6_RX_BUFFER_SIZE + head - tail;
if (avail >= RTS_HIGH_WATERMARK) rts_deassert();
}
}
@@ -351,7 +355,7 @@ void uart5_status_isr(void)
if (head == tail) {
UART5_C2 = C2_TX_COMPLETING;
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL6_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
if (use9Bits) UART5_C3 = (UART5_C3 & ~0x40) | ((n & 0x100) >> 2);
UART5_D = n;

+ 20
- 16
teensy3/serial6_lpuart.c 파일 보기

@@ -46,8 +46,12 @@
// Tunable parameters (relatively safe to edit these numbers)
////////////////////////////////////////////////////////////////

#define TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#define RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#ifndef SERIAL6_TX_BUFFER_SIZE
#define SERIAL6_TX_BUFFER_SIZE 40 // number of outgoing bytes to buffer
#endif
#ifndef SERIAL6_RX_BUFFER_SIZE
#define SERIAL6_RX_BUFFER_SIZE 64 // number of incoming bytes to buffer
#endif
#define RTS_HIGH_WATERMARK 40 // RTS requests sender to pause
#define RTS_LOW_WATERMARK 26 // RTS allows sender to resume
#define IRQ_PRIORITY 64 // 0 = highest priority, 255 = lowest
@@ -65,8 +69,8 @@ static uint8_t use9Bits = 0;
#define use9Bits 0
#endif

static volatile BUFTYPE tx_buffer[TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[RX_BUFFER_SIZE];
static volatile BUFTYPE tx_buffer[SERIAL6_TX_BUFFER_SIZE];
static volatile BUFTYPE rx_buffer[SERIAL6_RX_BUFFER_SIZE];
static volatile uint8_t transmitting = 0;
static volatile uint8_t *transmit_pin=NULL;
#define transmit_assert() *transmit_pin = 1
@@ -74,14 +78,14 @@ static volatile uint8_t *transmit_pin=NULL;
static volatile uint8_t *rts_pin=NULL;
#define rts_assert() *rts_pin = 0
#define rts_deassert() *rts_pin = 1
#if TX_BUFFER_SIZE > 255
#if SERIAL6_TX_BUFFER_SIZE > 255
static volatile uint16_t tx_buffer_head = 0;
static volatile uint16_t tx_buffer_tail = 0;
#else
static volatile uint8_t tx_buffer_head = 0;
static volatile uint8_t tx_buffer_tail = 0;
#endif
#if RX_BUFFER_SIZE > 255
#if SERIAL6_RX_BUFFER_SIZE > 255
static volatile uint16_t rx_buffer_head = 0;
static volatile uint16_t rx_buffer_tail = 0;
#else
@@ -304,13 +308,13 @@ void serial6_putchar(uint32_t c)
if (!(SIM_SCGC2 & SIM_SCGC2_LPUART0)) return;
if (transmit_pin) transmit_assert();
head = tx_buffer_head;
if (++head >= TX_BUFFER_SIZE) head = 0;
if (++head >= SERIAL6_TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) {
int priority = nvic_execution_priority();
if (priority <= IRQ_PRIORITY) {
if ((LPUART0_STAT & LPUART_STAT_TDRE)) {
uint32_t tail = tx_buffer_tail;
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL6_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
//if (use9Bits) UART5_C3 = (UART5_C3 & ~0x40) | ((n & 0x100) >> 2);
LPUART0_DATA = n;
@@ -346,7 +350,7 @@ int serial6_write_buffer_free(void)

head = tx_buffer_head;
tail = tx_buffer_tail;
if (head >= tail) return TX_BUFFER_SIZE - 1 - head + tail;
if (head >= tail) return SERIAL6_TX_BUFFER_SIZE - 1 - head + tail;
return tail - head - 1;
}

@@ -357,7 +361,7 @@ int serial6_available(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
return SERIAL6_RX_BUFFER_SIZE + head - tail;
}

int serial6_getchar(void)
@@ -368,13 +372,13 @@ int serial6_getchar(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL6_RX_BUFFER_SIZE) tail = 0;
c = rx_buffer[tail];
rx_buffer_tail = tail;
if (rts_pin) {
int avail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL6_RX_BUFFER_SIZE + head - tail;
if (avail <= RTS_LOW_WATERMARK) rts_assert();
}
return c;
@@ -387,7 +391,7 @@ int serial6_peek(void)
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL6_RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}

@@ -418,7 +422,7 @@ void lpuart0_status_isr(void)
// }
n = LPUART0_DATA & 0x3ff; // use only the 10 data bits
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head >= SERIAL6_RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = n;
rx_buffer_head = head;
@@ -427,7 +431,7 @@ void lpuart0_status_isr(void)
int avail;
tail = tx_buffer_tail;
if (head >= tail) avail = head - tail;
else avail = RX_BUFFER_SIZE + head - tail;
else avail = SERIAL6_RX_BUFFER_SIZE + head - tail;
if (avail >= RTS_HIGH_WATERMARK) rts_deassert();
}
}
@@ -441,7 +445,7 @@ void lpuart0_status_isr(void)
//LPUART0_CTRL &= ~LPUART_CTRL_TIE;
//LPUART0_CTRL |= LPUART_CTRL_TCIE; // Actually wondering if we can just leave this one on...
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
if (++tail >= SERIAL6_TX_BUFFER_SIZE) tail = 0;
n = tx_buffer[tail];
//if (use9Bits) UART5_C3 = (UART5_C3 & ~0x40) | ((n & 0x100) >> 2);
LPUART0_DATA = n;

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