/* mbed Microcontroller Library
* Copyright (c) 2006-2015 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// math.h required for floating point operations for baud rate calculation
#include "mbed_assert.h"
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include "serial_api.h"
#include "cmsis.h"
#include "pinmap.h"
#include "gpio_api.h"
#include "scif_iodefine.h"
#include "cpg_iodefine.h"
#include "mbed_critical.h"
/******************************************************************************
* INITIALIZATION
******************************************************************************/
#define PCLK (66666666) // Define the peripheral clock P1 frequency.
#define UART_NUM 8
#define IRQ_NUM 4
static void uart0_tx_irq(void);
static void uart1_tx_irq(void);
static void uart2_tx_irq(void);
static void uart3_tx_irq(void);
static void uart4_tx_irq(void);
static void uart5_tx_irq(void);
static void uart6_tx_irq(void);
static void uart7_tx_irq(void);
static void uart0_rx_irq(void);
static void uart1_rx_irq(void);
static void uart2_rx_irq(void);
static void uart3_rx_irq(void);
static void uart4_rx_irq(void);
static void uart5_rx_irq(void);
static void uart6_rx_irq(void);
static void uart7_rx_irq(void);
static void uart0_er_irq(void);
static void uart1_er_irq(void);
static void uart2_er_irq(void);
static void uart3_er_irq(void);
static void uart4_er_irq(void);
static void uart5_er_irq(void);
static void uart6_er_irq(void);
static void uart7_er_irq(void);
static void serial_put_done(serial_t *obj);
static uint8_t serial_available_buffer(serial_t *obj);
static void serial_irq_err_set(serial_t *obj, uint32_t enable);
static const PinMap PinMap_UART_TX[] = {
{P2_14 , UART0, 6},
{P2_5 , UART1, 6},
{P4_12 , UART1, 7},
{P6_3 , UART2, 7},
{P4_14 , UART2, 7},
{P5_3 , UART3, 5},
{P8_8 , UART3, 7},
{P5_0 , UART4, 5},
{P8_14 , UART4, 7},
{P8_13 , UART5, 5},
{P11_10, UART5, 3},
{P6_6 , UART5, 5},
{P5_6 , UART6, 5},
{P11_1 , UART6, 4},
{P7_4 , UART7, 4},
{NC , NC , 0}
};
static const PinMap PinMap_UART_RX[] = {
{P2_15 , UART0, 6},
{P2_6 , UART1, 6},
{P4_13 , UART1, 7},
{P6_2 , UART2, 7},
{P4_15 , UART2, 7},
{P5_4 , UART3, 5},
{P8_9 , UART3, 7},
{P5_1 , UART4, 5},
{P8_15 , UART4, 7},
{P8_11 , UART5, 5},
{P11_11, UART5, 3},
{P6_7 , UART5, 5},
{P5_7 , UART6, 5},
{P11_2 , UART6, 4},
{P7_5 , UART7, 4},
{NC , NC , 0}
};
static const PinMap PinMap_UART_CTS[] = {
{P2_3 , UART1, 6},
{P11_7 , UART5, 3},
{P7_6 , UART7, 4},
{NC , NC , 0}
};
static const PinMap PinMap_UART_RTS[] = {
{P2_7 , UART1, 6},
{P11_8 , UART5, 3},
{P7_7 , UART7, 4},
{NC , NC , 0}
};
static const struct st_scif *SCIF[] = SCIF_ADDRESS_LIST;
static uart_irq_handler irq_handler;
int stdio_uart_inited = 0;
serial_t stdio_uart;
struct serial_global_data_s {
uint32_t serial_irq_id;
gpio_t sw_rts, sw_cts;
uint8_t rx_irq_set_flow, rx_irq_set_api;
serial_t *tranferring_obj, *receiving_obj;
uint32_t async_tx_callback, async_rx_callback;
int event, wanted_rx_events;
};
static struct serial_global_data_s uart_data[UART_NUM];
static const IRQn_Type irq_set_tbl[UART_NUM][IRQ_NUM] = {
{SCIFRXI0_IRQn, SCIFTXI0_IRQn, SCIFBRI0_IRQn, SCIFERI0_IRQn},
{SCIFRXI1_IRQn, SCIFTXI1_IRQn, SCIFBRI1_IRQn, SCIFERI1_IRQn},
{SCIFRXI2_IRQn, SCIFTXI2_IRQn, SCIFBRI2_IRQn, SCIFERI2_IRQn},
{SCIFRXI3_IRQn, SCIFTXI3_IRQn, SCIFBRI3_IRQn, SCIFERI3_IRQn},
{SCIFRXI4_IRQn, SCIFTXI4_IRQn, SCIFBRI4_IRQn, SCIFERI4_IRQn},
{SCIFRXI5_IRQn, SCIFTXI5_IRQn, SCIFBRI5_IRQn, SCIFERI5_IRQn},
{SCIFRXI6_IRQn, SCIFTXI6_IRQn, SCIFBRI6_IRQn, SCIFERI6_IRQn},
{SCIFRXI7_IRQn, SCIFTXI7_IRQn, SCIFBRI7_IRQn, SCIFERI7_IRQn}
};
static const IRQHandler hander_set_tbl[UART_NUM][IRQ_NUM] = {
{uart0_rx_irq, uart0_tx_irq, uart0_er_irq, uart0_er_irq},
{uart1_rx_irq, uart1_tx_irq, uart1_er_irq, uart1_er_irq},
{uart2_rx_irq, uart2_tx_irq, uart2_er_irq, uart2_er_irq},
{uart3_rx_irq, uart3_tx_irq, uart3_er_irq, uart3_er_irq},
{uart4_rx_irq, uart4_tx_irq, uart4_er_irq, uart4_er_irq},
{uart5_rx_irq, uart5_tx_irq, uart5_er_irq, uart5_er_irq},
{uart6_rx_irq, uart6_tx_irq, uart6_er_irq, uart6_er_irq},
{uart7_rx_irq, uart7_tx_irq, uart7_er_irq, uart7_er_irq}
};
static __IO uint16_t *SCSCR_MATCH[] = {
&SCSCR_0,
&SCSCR_1,
&SCSCR_2,
&SCSCR_3,
&SCSCR_4,
&SCSCR_5,
&SCSCR_6,
&SCSCR_7,
};
static __IO uint16_t *SCFSR_MATCH[] = {
&SCFSR_0,
&SCFSR_1,
&SCFSR_2,
&SCFSR_3,
&SCFSR_4,
&SCFSR_5,
&SCFSR_6,
&SCFSR_7,
};
void serial_init(serial_t *obj, PinName tx, PinName rx) {
volatile uint8_t dummy ;
int is_stdio_uart = 0;
// determine the UART to use
uint32_t uart_tx = pinmap_peripheral(tx, PinMap_UART_TX);
uint32_t uart_rx = pinmap_peripheral(rx, PinMap_UART_RX);
uint32_t uart = pinmap_merge(uart_tx, uart_rx);
MBED_ASSERT((int)uart != NC);
obj->serial.uart = (struct st_scif *)SCIF[uart];
// enable power
switch (uart) {
case UART0:
CPG.STBCR4 &= ~(1 << 7);
break;
case UART1:
CPG.STBCR4 &= ~(1 << 6);
break;
case UART2:
CPG.STBCR4 &= ~(1 << 5);
break;
case UART3:
CPG.STBCR4 &= ~(1 << 4);
break;
case UART4:
CPG.STBCR4 &= ~(1 << 3);
break;
case UART5:
CPG.STBCR4 &= ~(1 << 2);
break;
case UART6:
CPG.STBCR4 &= ~(1 << 1);
break;
case UART7:
CPG.STBCR4 &= ~(1 << 0);
break;
}
dummy = CPG.STBCR4;
/* ==== SCIF initial setting ==== */
/* ---- Serial control register (SCSCR) setting ---- */
/* B'00 : Internal CLK */
obj->serial.uart->SCSCR = 0x0000u; /* SCIF transmitting and receiving operations stop */
/* ---- FIFO control register (SCFCR) setting ---- */
/* Transmit FIFO reset & Receive FIFO data register reset */
obj->serial.uart->SCFCR = 0x0006;
/* ---- Serial status register (SCFSR) setting ---- */
dummy = obj->serial.uart->SCFSR;
obj->serial.uart->SCFSR = (dummy & 0xFF6Cu); /* ER,BRK,DR bit clear */
/* ---- Line status register (SCLSR) setting ---- */
/* ORER bit clear */
obj->serial.uart->SCLSR = 0;
/* ---- Serial extension mode register (SCEMR) setting ----
b7 BGDM - Baud rate generator double-speed mode : Normal mode
b0 ABCS - Base clock select in asynchronous mode : Base clock is 16 times the bit rate */
obj->serial.uart->SCEMR = 0x0000u;
/* ---- Bit rate register (SCBRR) setting ---- */
serial_baud (obj, 9600);
serial_format(obj, 8, ParityNone, 1);
/* ---- FIFO control register (SCFCR) setting ---- */
obj->serial.uart->SCFCR = 0x0030u;
/* ---- Serial port register (SCSPTR) setting ----
b1 SPB2IO - Serial port break output : disabled
b0 SPB2DT - Serial port break data : High-level */
obj->serial.uart->SCSPTR = 0x0003u; // SPB2IO = 1, SPB2DT = 1
/* ---- Line status register (SCLSR) setting ----
b0 ORER - Overrun error detect : clear */
if (obj->serial.uart->SCLSR & 0x0001) {
obj->serial.uart->SCLSR = 0u; // ORER clear
}
// pinout the chosen uart
pinmap_pinout(tx, PinMap_UART_TX);
pinmap_pinout(rx, PinMap_UART_RX);
switch (uart) {
case UART0:
obj->serial.index = 0;
break;
case UART1:
obj->serial.index = 1;
break;
case UART2:
obj->serial.index = 2;
break;
case UART3:
obj->serial.index = 3;
break;
case UART4:
obj->serial.index = 4;
break;
case UART5:
obj->serial.index = 5;
break;
case UART6:
obj->serial.index = 6;
break;
case UART7:
obj->serial.index = 7;
break;
}
uart_data[obj->serial.index].sw_rts.pin = NC;
uart_data[obj->serial.index].sw_cts.pin = NC;
/* ---- Serial control register (SCSCR) setting ---- */
/* Setting the TE and RE bits enables the TxD and RxD pins to be used. */
obj->serial.uart->SCSCR = 0x0070;
is_stdio_uart = (uart == STDIO_UART) ? (1) : (0);
if (is_stdio_uart) {
stdio_uart_inited = 1;
memcpy(&stdio_uart, obj, sizeof(serial_t));
}
}
void serial_free(serial_t *obj) {
uart_data[obj->serial.index].serial_irq_id = 0;
}
// serial_baud
// set the baud rate, taking in to account the current SystemFrequency
void serial_baud(serial_t *obj, int baudrate) {
uint16_t DL;
obj->serial.uart->SCSMR &= ~0x0003;
if (baudrate > 32552) {
obj->serial.uart->SCEMR = 0x0081; // BGDM = 1, ABCS = 1
DL = PCLK / (8 * baudrate);
if (DL > 0) {
DL--;
}
obj->serial.uart->SCBRR = (uint8_t)DL;
} else if (baudrate > 16276) {
obj->serial.uart->SCEMR = 0x0080; // BGDM = 1
obj->serial.uart->SCBRR = PCLK / (16 * baudrate) - 1;
} else if (baudrate > 8138) {
obj->serial.uart->SCEMR = 0x0000;
obj->serial.uart->SCBRR = PCLK / (32 * baudrate) - 1;
} else if (baudrate > 4169) {
obj->serial.uart->SCSMR |= 0x0001;
obj->serial.uart->SCEMR = 0x0080; // BGDM = 1
obj->serial.uart->SCBRR = PCLK / (64 * baudrate) - 1;
} else if (baudrate > 2034) {
obj->serial.uart->SCSMR |= 0x0001;
obj->serial.uart->SCEMR = 0x0000;
obj->serial.uart->SCBRR = PCLK / (128 * baudrate) - 1;
} else if (baudrate > 1017) {
obj->serial.uart->SCSMR |= 0x0002;
obj->serial.uart->SCEMR = 0x0080; // BGDM = 1
obj->serial.uart->SCBRR = PCLK / (256 * baudrate) - 1;
} else if (baudrate > 508) {
obj->serial.uart->SCSMR |= 0x0002;
obj->serial.uart->SCEMR = 0x0000;
obj->serial.uart->SCBRR = PCLK / (512 * baudrate) - 1;
} else if (baudrate > 254) {
obj->serial.uart->SCSMR |= 0x0003;
obj->serial.uart->SCEMR = 0x0080; // BGDM = 1
obj->serial.uart->SCBRR = PCLK / (1024 * baudrate) - 1;
} else if (baudrate > 127) {
obj->serial.uart->SCSMR |= 0x0003;
obj->serial.uart->SCEMR = 0x0000;
obj->serial.uart->SCBRR = PCLK / (2048 * baudrate) - 1;
} else {
obj->serial.uart->SCSMR |= 0x0003;
obj->serial.uart->SCEMR = 0x0000;
obj->serial.uart->SCBRR = 0xFFu;
}
}
void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
int parity_enable;
int parity_select;
MBED_ASSERT((stop_bits == 1) || (stop_bits == 2)); // 0: 1 stop bits, 1: 2 stop bits
MBED_ASSERT((data_bits > 4) && (data_bits < 9)); // 5: 5 data bits ... 3: 8 data bits
MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven) ||
(parity == ParityForced1) || (parity == ParityForced0));
stop_bits = (stop_bits == 1)? 0:
(stop_bits == 2)? 1:
0; // must not to be
data_bits = (data_bits == 8)? 0:
(data_bits == 7)? 1:
0; // must not to be
switch (parity) {
case ParityNone:
parity_enable = 0;
parity_select = 0;
break;
case ParityOdd:
parity_enable = 1;
parity_select = 1;
break;
case ParityEven:
parity_enable = 1;
parity_select = 0;
break;
case ParityForced1:
case ParityForced0:
default:
parity_enable = 0;
parity_select = 0;
break;
}
obj->serial.uart->SCSMR = (obj->serial.uart->SCSMR & ~0x0078)
| (data_bits << 6)
| (parity_enable << 5)
| (parity_select << 4)
| (stop_bits << 3);
}
/******************************************************************************
* INTERRUPTS HANDLING
******************************************************************************/
static void uart_tx_irq(IRQn_Type irq_num, uint32_t index) {
__IO uint16_t *dmy_rd_scscr;
__IO uint16_t *dmy_rd_scfsr;
serial_t *obj;
int i;
dmy_rd_scscr = SCSCR_MATCH[index];
*dmy_rd_scscr &= 0x007B; // Clear TIE and Write to bit15~8,2 is always 0
dmy_rd_scfsr = SCFSR_MATCH[index];
*dmy_rd_scfsr = (*dmy_rd_scfsr & ~0x0020); // Set TEND
obj = uart_data[index].tranferring_obj;
if (obj) {
i = obj->tx_buff.length - obj->tx_buff.pos;
if (0 < i) {
if (serial_available_buffer(obj) < i) {
i = serial_available_buffer(obj);
}
do {
uint8_t c = *(uint8_t *)obj->tx_buff.buffer;
obj->tx_buff.buffer = (uint8_t *)obj->tx_buff.buffer + 1;
++obj->tx_buff.pos;
obj->serial.uart->SCFTDR = c;
} while (--i);
serial_put_done(obj);
} else {
uart_data[index].tranferring_obj = NULL;
uart_data[index].event = SERIAL_EVENT_TX_COMPLETE;
((void (*)())uart_data[index].async_tx_callback)();
}
}
irq_handler(uart_data[index].serial_irq_id, TxIrq);
}
static void uart_rx_irq(IRQn_Type irq_num, uint32_t index) {
__IO uint16_t *dmy_rd_scscr;
__IO uint16_t *dmy_rd_scfsr;
serial_t *obj;
int c;
dmy_rd_scscr = SCSCR_MATCH[index];
*dmy_rd_scscr &= 0x00B3; // Clear RIE,REIE and Write to bit15~8,2 is always 0
dmy_rd_scfsr = SCFSR_MATCH[index];
*dmy_rd_scfsr = (*dmy_rd_scfsr & ~0x0003); // Clear RDF,DR
obj = uart_data[index].receiving_obj;
if (obj) {
if (obj->serial.uart->SCLSR & 1) {
if (uart_data[index].wanted_rx_events & SERIAL_EVENT_RX_OVERRUN_ERROR) {
serial_rx_abort_asynch(obj);
uart_data[index].event = SERIAL_EVENT_RX_OVERRUN_ERROR;
((void (*)())uart_data[index].async_rx_callback)();
}
return;
}
c = serial_getc(obj);
if (c != -1) {
((uint8_t *)obj->rx_buff.buffer)[obj->rx_buff.pos] = c;
++obj->rx_buff.pos;
if (c == obj->char_match && ! obj->char_found) {
obj->char_found = 1;
if (obj->rx_buff.pos == obj->rx_buff.length) {
if (uart_data[index].wanted_rx_events & SERIAL_EVENT_RX_COMPLETE) {
uart_data[index].event = SERIAL_EVENT_RX_COMPLETE;
}
}
if (uart_data[index].wanted_rx_events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
uart_data[index].event |= SERIAL_EVENT_RX_CHARACTER_MATCH;
}
if (uart_data[index].event) {
uart_data[index].receiving_obj = NULL;
((void (*)())uart_data[index].async_rx_callback)();
}
} else if (obj->rx_buff.pos == obj->rx_buff.length) {
uart_data[index].receiving_obj = NULL;
if (uart_data[index].wanted_rx_events & SERIAL_EVENT_RX_COMPLETE) {
uart_data[index].event = SERIAL_EVENT_RX_COMPLETE;
((void (*)())uart_data[index].async_rx_callback)();
}
}
} else {
serial_rx_abort_asynch(obj);
if (uart_data[index].wanted_rx_events & (SERIAL_EVENT_RX_PARITY_ERROR | SERIAL_EVENT_RX_FRAMING_ERROR)) {
uart_data[index].event = SERIAL_EVENT_RX_PARITY_ERROR | SERIAL_EVENT_RX_FRAMING_ERROR;
if (obj->serial.uart->SCFSR & 1 << 2) {
uart_data[index].event = SERIAL_EVENT_RX_PARITY_ERROR;
} else if (obj->serial.uart->SCFSR & 1 << 3) {
uart_data[index].event = SERIAL_EVENT_RX_FRAMING_ERROR;
}
((void (*)())uart_data[index].async_rx_callback)();
}
return;
}
}
irq_handler(uart_data[index].serial_irq_id, RxIrq);
}
static void uart_err_irq(IRQn_Type irq_num, uint32_t index) {
serial_t *obj = uart_data[index].receiving_obj;
int err_read;
if (obj) {
serial_irq_err_set(obj, 0);
if (uart_data[index].wanted_rx_events & (SERIAL_EVENT_RX_PARITY_ERROR | SERIAL_EVENT_RX_FRAMING_ERROR)) {
uart_data[index].event = SERIAL_EVENT_RX_PARITY_ERROR | SERIAL_EVENT_RX_FRAMING_ERROR;
if (obj->serial.uart->SCFSR & 1 << 2) {
uart_data[index].event = SERIAL_EVENT_RX_PARITY_ERROR;
} else if (obj->serial.uart->SCFSR & 1 << 3) {
uart_data[index].event = SERIAL_EVENT_RX_FRAMING_ERROR;
}
((void (*)())uart_data[index].async_rx_callback)();
}
serial_rx_abort_asynch(obj);
core_util_critical_section_enter();
if (obj->serial.uart->SCFSR & 0x93) {
err_read = obj->serial.uart->SCFSR;
obj->serial.uart->SCFSR = (err_read & ~0x93);
}
if (obj->serial.uart->SCLSR & 1) {
obj->serial.uart->SCLSR = 0;
}
core_util_critical_section_exit();
}
}
/* TX handler */
static void uart0_tx_irq(void) {
uart_tx_irq(SCIFTXI0_IRQn, 0);
}
static void uart1_tx_irq(void) {
uart_tx_irq(SCIFTXI1_IRQn, 1);
}
static void uart2_tx_irq(void) {
uart_tx_irq(SCIFTXI2_IRQn, 2);
}
static void uart3_tx_irq(void) {
uart_tx_irq(SCIFTXI3_IRQn, 3);
}
static void uart4_tx_irq(void) {
uart_tx_irq(SCIFTXI4_IRQn, 4);
}
static void uart5_tx_irq(void) {
uart_tx_irq(SCIFTXI5_IRQn, 5);
}
static void uart6_tx_irq(void) {
uart_tx_irq(SCIFTXI6_IRQn, 6);
}
static void uart7_tx_irq(void) {
uart_tx_irq(SCIFTXI7_IRQn, 7);
}
/* RX handler */
static void uart0_rx_irq(void) {
uart_rx_irq(SCIFRXI0_IRQn, 0);
}
static void uart1_rx_irq(void) {
uart_rx_irq(SCIFRXI1_IRQn, 1);
}
static void uart2_rx_irq(void) {
uart_rx_irq(SCIFRXI2_IRQn, 2);
}
static void uart3_rx_irq(void) {
uart_rx_irq(SCIFRXI3_IRQn, 3);
}
static void uart4_rx_irq(void) {
uart_rx_irq(SCIFRXI4_IRQn, 4);
}
static void uart5_rx_irq(void) {
uart_rx_irq(SCIFRXI5_IRQn, 5);
}
static void uart6_rx_irq(void) {
uart_rx_irq(SCIFRXI6_IRQn, 6);
}
static void uart7_rx_irq(void) {
uart_rx_irq(SCIFRXI7_IRQn, 7);
}
/* Error handler */
static void uart0_er_irq(void)
{
uart_err_irq(SCIFERI0_IRQn, 0);
}
static void uart1_er_irq(void)
{
uart_err_irq(SCIFERI0_IRQn, 1);
}
static void uart2_er_irq(void)
{
uart_err_irq(SCIFERI0_IRQn, 2);
}
static void uart3_er_irq(void)
{
uart_err_irq(SCIFERI0_IRQn, 3);
}
static void uart4_er_irq(void)
{
uart_err_irq(SCIFERI0_IRQn, 4);
}
static void uart5_er_irq(void)
{
uart_err_irq(SCIFERI0_IRQn, 5);
}
static void uart6_er_irq(void)
{
uart_err_irq(SCIFERI0_IRQn, 6);
}
static void uart7_er_irq(void)
{
uart_err_irq(SCIFERI0_IRQn, 7);
}
void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
irq_handler = handler;
uart_data[obj->serial.index].serial_irq_id = id;
}
static void serial_irq_set_irq(IRQn_Type IRQn, IRQHandler handler, uint32_t enable)
{
if (enable) {
InterruptHandlerRegister(IRQn, (void (*)(uint32_t))handler);
GIC_SetPriority(IRQn, 5);
GIC_EnableIRQ(IRQn);
} else {
GIC_DisableIRQ(IRQn);
}
}
static void serial_irq_set_internal(serial_t *obj, SerialIrq irq, uint32_t enable) {
IRQn_Type IRQn;
IRQHandler handler;
IRQn = irq_set_tbl[obj->serial.index][irq];
handler = hander_set_tbl[obj->serial.index][irq];
if ((obj->serial.index >= 0) && (obj->serial.index <= 7)) {
serial_irq_set_irq(IRQn, handler, enable);
}
}
static void serial_irq_err_set(serial_t *obj, uint32_t enable)
{
serial_irq_set_irq(irq_set_tbl[obj->serial.index][2], hander_set_tbl[obj->serial.index][2], enable);
serial_irq_set_irq(irq_set_tbl[obj->serial.index][3], hander_set_tbl[obj->serial.index][3], enable);
}
void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
if (RxIrq == irq) {
uart_data[obj->serial.index].rx_irq_set_api = enable;
}
serial_irq_set_internal(obj, irq, enable);
}
static void serial_flow_irq_set(serial_t *obj, uint32_t enable) {
uart_data[obj->serial.index].rx_irq_set_flow = enable;
serial_irq_set_internal(obj, RxIrq, enable);
}
/******************************************************************************
* READ/WRITE
******************************************************************************/
int serial_getc(serial_t *obj) {
uint16_t err_read;
int data;
core_util_critical_section_enter();
if (obj->serial.uart->SCFSR & 0x93) {
err_read = obj->serial.uart->SCFSR;
obj->serial.uart->SCFSR = (err_read & ~0x93);
}
obj->serial.uart->SCSCR |= 0x0040; // Set RIE
core_util_critical_section_exit();
if (obj->serial.uart->SCLSR & 0x0001) {
obj->serial.uart->SCLSR = 0u; // ORER clear
}
while (!serial_readable(obj));
data = obj->serial.uart->SCFRDR & 0xff;
core_util_critical_section_enter();
err_read = obj->serial.uart->SCFSR;
obj->serial.uart->SCFSR = (err_read & 0xfffD); // Clear RDF
core_util_critical_section_exit();
if (err_read & 0x80) {
data = -1; //err
}
return data;
}
void serial_putc(serial_t *obj, int c) {
while (!serial_writable(obj));
obj->serial.uart->SCFTDR = c;
serial_put_done(obj);
}
static void serial_put_done(serial_t *obj)
{
volatile uint16_t dummy_read;
core_util_critical_section_enter();
dummy_read = obj->serial.uart->SCFSR;
obj->serial.uart->SCFSR = (dummy_read & 0xff9f); // Clear TEND/TDFE
obj->serial.uart->SCSCR |= 0x0080; // Set TIE
core_util_critical_section_exit();
}
int serial_readable(serial_t *obj) {
return ((obj->serial.uart->SCFSR & 0x02) != 0); // RDF
}
int serial_writable(serial_t *obj) {
return ((obj->serial.uart->SCFSR & 0x20) != 0); // TDFE
}
void serial_clear(serial_t *obj) {
core_util_critical_section_enter();
obj->serial.uart->SCFCR |= 0x06; // TFRST = 1, RFRST = 1
obj->serial.uart->SCFCR &= ~0x06; // TFRST = 0, RFRST = 0
obj->serial.uart->SCFSR &= ~0x0093u; // ER, BRK, RDF, DR = 0
core_util_critical_section_exit();
}
void serial_pinout_tx(PinName tx) {
pinmap_pinout(tx, PinMap_UART_TX);
}
void serial_break_set(serial_t *obj) {
core_util_critical_section_enter();
// TxD Output(L)
obj->serial.uart->SCSPTR &= ~0x0001u; // SPB2DT = 0
obj->serial.uart->SCSCR &= ~0x0020u; // TE = 0 (Output disable)
core_util_critical_section_exit();
}
void serial_break_clear(serial_t *obj) {
core_util_critical_section_enter();
obj->serial.uart->SCSCR |= 0x0020u; // TE = 1 (Output enable)
obj->serial.uart->SCSPTR |= 0x0001u; // SPB2DT = 1
core_util_critical_section_exit();
}
void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow) {
// determine the UART to use
serial_flow_irq_set(obj, 0);
if (type == FlowControlRTSCTS) {
core_util_critical_section_enter();
obj->serial.uart->SCFCR = 0x0008u; // CTS/RTS enable
core_util_critical_section_exit();
pinmap_pinout(rxflow, PinMap_UART_RTS);
pinmap_pinout(txflow, PinMap_UART_CTS);
} else {
core_util_critical_section_enter();
obj->serial.uart->SCFCR = 0x0000u; // CTS/RTS diable
core_util_critical_section_exit();
}
}
static uint8_t serial_available_buffer(serial_t *obj)
{
return 1;
/* Faster but unstable way */
/*
uint16_t ret = 16 - ((obj->serial.uart->SCFDR >> 8) & 0x1F);
while (ret == 0) {
ret = 16 - ((obj->serial.uart->SCFDR >> 8) & 0x1F);
}
MBED_ASSERT(0 < ret && ret <= 16);
return ret;
*/
}
#if DEVICE_SERIAL_ASYNCH
/******************************************************************************
* ASYNCHRONOUS HAL
******************************************************************************/
int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx_width, uint32_t handler, uint32_t event, DMAUsage hint)
{
int i;
buffer_t *buf = &obj->tx_buff;
struct serial_global_data_s *data = uart_data + obj->serial.index;
if (tx_length == 0) {
return 0;
}
buf->buffer = (void *)tx;
buf->length = tx_length * tx_width / 8;
buf->pos = 0;
buf->width = tx_width;
data->tranferring_obj = obj;
data->async_tx_callback = handler;
serial_irq_set(obj, TxIrq, 1);
while (!serial_writable(obj));
i = buf->length;
if (serial_available_buffer(obj) < i) {
i = serial_available_buffer(obj);
}
do {
uint8_t c = *(uint8_t *)buf->buffer;
obj->tx_buff.buffer = (uint8_t *)obj->tx_buff.buffer + 1;
++buf->pos;
obj->serial.uart->SCFTDR = c;
} while (--i);
serial_put_done(obj);
return buf->length;
}
void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_width, uint32_t handler, uint32_t event, uint8_t char_match, DMAUsage hint)
{
buffer_t *buf = &obj->rx_buff;
struct serial_global_data_s *data = uart_data + obj->serial.index;
if (rx_length == 0) {
return;
}
buf->buffer = rx;
buf->length = rx_length * rx_width / 8;
buf->pos = 0;
buf->width = rx_width;
obj->char_match = char_match;
obj->char_found = 0;
data->receiving_obj = obj;
data->async_rx_callback = handler;
data->event = 0;
data->wanted_rx_events = event;
serial_irq_set(obj, RxIrq, 1);
serial_irq_err_set(obj, 1);
}
uint8_t serial_tx_active(serial_t *obj)
{
return uart_data[obj->serial.index].tranferring_obj != NULL;
}
uint8_t serial_rx_active(serial_t *obj)
{
return uart_data[obj->serial.index].receiving_obj != NULL;
}
int serial_irq_handler_asynch(serial_t *obj)
{
return uart_data[obj->serial.index].event;
}
void serial_tx_abort_asynch(serial_t *obj)
{
uart_data[obj->serial.index].tranferring_obj = NULL;
obj->serial.uart->SCFCR |= 1 << 2;
obj->serial.uart->SCFCR &= ~(1 << 2);
}
void serial_rx_abort_asynch(serial_t *obj)
{
uart_data[obj->serial.index].receiving_obj = NULL;
obj->serial.uart->SCFCR |= 1 << 1;
obj->serial.uart->SCFCR &= ~(1 << 1);
}
#endif
