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rt-thread-official/bsp/rx/drivers/uart.c

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/*
*********************************************************************************************************
* Filename : uart.c
*********************************************************************************************************
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "uart.h"
#include <stdint.h>
#include <stdbool.h>
#include "r_pdl_sci.h"
/* General RPDL function definitions */
#include "r_pdl_definitions.h"
#include "intrinsics.h"
#include "iorx62n.h"
//#include <string.h>
/* Clock selection control */
#define SCI_CKS_MIN 0
#define SCI_CKS_MAX 3
#define SCI_CKS_STEP 1
#define IPR_ADDRESS(a) ((volatile unsigned char *)&ICU.IPR[IPR_SCI0_ + a])
//#define IER_ADDRESS(a) ((volatile unsigned char *)&(ICU.IER[IER_SCI0_ERI0 + a])/sizeof(unsigned char))
#define ERI_ADDRESS(a) ((volatile unsigned char *)&ICU.IR[IR_SCI0_ERI0] + ((4 * a) / sizeof(unsigned char)) )
#define IER_ADDRESS(a) ((volatile unsigned char *)&ICU.IER[IER_SCI0_ERI0] + ((4 * a) / sizeof(unsigned char)) )
#define RXI_ADDRESS(a) ((volatile unsigned char *)&ICU.IR[IR_SCI0_RXI0] + ((4 * a) / sizeof(unsigned char)) )
#define TXI_ADDRESS(a) ((volatile unsigned char *)&ICU.IR[IR_SCI0_TXI0] + ((4 * a) / sizeof(unsigned char)) )
#define TEI_ADDRESS(a) ((volatile unsigned char *)&ICU.IR[IR_SCI0_TEI0] + ((4 * a) / sizeof(unsigned char)) )
#define RXI_DTCER_ADDRESS(a) (( volatile unsigned char *)&ICU.DTCER[IR_SCI0_RXI0]+ ((4*a)/sizeof(unsigned char)))
#define TXI_DTCER_ADDRESS(a) (( volatile unsigned char *)&ICU.DTCER[IR_SCI0_TXI0]+ ((4*a) / sizeof(unsigned char)))
//#define SCI1_USE_B
//#define SCI2_USE_B
//#define SCI3_USE_B
//#define SCI6_USE_B
#define SourceClk 12000000
#define rpdl_CGC_f_pclk SourceClk * 4
/* Idle output options */
#define SPACE 0
#define MARK 1
typedef int UART_ID_Type;
typedef int IRQn_Type;
#define SCI2_USE_B
struct rx_uart
{
UART_ID_Type UART;
volatile struct st_sci __sfr * sci;
};
static rt_err_t rx_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
#if 1
struct rx_uart *uart;
unsigned char smr_copy;
unsigned char semr_copy;
unsigned char scr_copy;
unsigned char scmr_copy;
unsigned long brr_divider;
unsigned long bit_interval_counter;
RT_ASSERT(serial != RT_NULL);
uart = (struct rx_uart *)serial->parent.user_data;
if (uart->UART > 6) {
return RT_ERROR;
}
/* Initialise the working copies */
smr_copy = 0x00u;
scr_copy = 0x00u;
semr_copy = 0x00u;
scmr_copy = 0x72u;
brr_divider = 0;
switch (uart->UART) {
case 0:
SYSTEM.MSTPCRB.BIT.MSTPB31 = 0;
/* Enable the input buffer */
PORT2.ICR.BIT.B2 = 1;
/* Ensure the pin is set to input */
PORT2.DDR.BIT.B2 = 0;
/* Disable the USB0_DRPD output */
IOPORT.PFKUSB.BIT.USBE = 0;
/* Disable the MTIOC3B-A output */
MTU3.TIORH.BIT.IOB = 0;
/* Disable the TMO0 output */
TMR0.TCSR.BIT.OSA = 0;
TMR0.TCSR.BIT.OSB = 0;
/* Disable the MTIOC1A output */
MTU1.TIOR.BIT.IOA = 0;
/* Set the idle state direction */
PORT2.DDR.BIT.B0 = 1;
PORT2.DR.BIT.B0 = 1;
PORT2.ICR.BIT.B0 = 1;
PORT2.ICR.BIT.B1 = 1;
break;
case 1:
SYSTEM.MSTPCRB.BIT.MSTPB30 = 0;
/* Disable the CS6#-C output */
IOPORT.PF0CSE.BIT.CS6E = 0;
/* Disable the MOSIB-A output */
IOPORT.PFHSPI.BIT.MOSIE = 0;
/* Disable the MTIOC2A output */
MTU2.TIOR.BIT.IOA = 0;
/* Disable the TMO1 output */
TMR1.TCSR.BYTE = 0xF0u;
#ifdef SCI1_USE_B
IOPORT.PFFSCI.BIT.SCI1S = 1;
PORTF.DDR.BIT.B2 = 0;
PORTF.ICR.BIT.B2 = 1;
PORTF.DDR.BIT.B0 = 1;
PORTF.DR.BIT.B0 = 1;
#else
IOPORT.PFFSCI.BIT.SCI1S = 0;
/* Set the idle state direction */
PORT2.DDR.BIT.B6 = 1;
PORT2.DR.BIT.B6 = 1;
// PORT2.DR.BIT.B6 = 1;
/* Enable the input buffer */
//PORT3.ICR.BIT.B0 = 1;
/* Ensure the pin is set to input */
PORT3.DDR.BIT.B0 = 0;
#endif
break;
case 2:
SYSTEM.MSTPCRB.BIT.MSTPB29 = 0;
/* Disable the SSLB2-A output */
IOPORT.PFHSPI.BIT.SSL2E = 0;
#ifdef SCI2_USE_B
IOPORT.PFFSCI.BIT.SCI2S = 1;
PORT5.DDR.BIT.B0 = 1;
PORT5.DR.BIT.B0 = 1;
PORT5.DDR.BIT.B2 = 0;
PORT5.ICR.BIT.B2 = 1;
/* Disable the SSLB1-A output */
IOPORT.PFHSPI.BIT.SSL1E = 0;
#else
IOPORT.PFFSCI.BIT.SCI2S = 0;
/* Enable the input buffer */
PORT1.ICR.BIT.B2 = 1;
/* Ensure the pin is set to input */
PORT1.DDR.BIT.B2 = 0;
PORT1.DDR.BIT.B3 = 1;
PORT1.DR.BIT.B3 = 1;
/* Disable the TMO3 output */
TMR3.TCSR.BYTE = 0xF0u;
#endif
break;
case 3:
SYSTEM.MSTPCRB.BIT.MSTPB28 = 0;
#ifdef SCI3_USE_B
IOPORT.PFFSCI.BIT.SCI3S = 1;
PORT2.DDR.BIT.B5 = 0;
PORT2.ICR.BIT.B5 = 1;
PORT2.DDR.BIT.B3 = 1;
PORT2.DR.BIT.B3 = 1;
IOPORT.PF0CSE.BIT.CS4E = 0;
/* Disable the USB0_VBUSEN-A output */
IOPORT.PFKUSB.BIT.USBE = 0;
/* Disable the MTIOC4A-A output */
MTU4.TIORH.BIT.IOA = 0;
/* Disable the USB0_DPUPE-A output */
IOPORT.PFKUSB.BIT.USBE = 0;
/* Disable the EDACK0-B output */
EXDMAC0.EDMOMD.BIT.DACKE = 0;
/* Disable the MTIOC3D-A output */
MTU3.TIORL.BIT.IOD = 0;
#else
IOPORT.PFFSCI.BIT.SCI3S = 0;
/* Disable the MTIOC0B output */
MTU0.TIORH.BIT.IOB = 0;
PORT1.DDR.BIT.B6 = 0;
PORT1.ICR.BIT.B6 = 1;
PORT1.DDR.BIT.B7 = 1;
PORT1.DR.BIT.B7 = 1;
MTU3.TIORH.BIT.IOA = 0;
/* Set the idle state direction */
#endif
break;
//case UartPort4:
// SYSTEM.MSTPCRB.BIT.MSTPB27 = 0;
// break;
case 5:
SYSTEM.MSTPCRB.BIT.MSTPB26 = 0;
/* Enable the input buffer */
PORTC.ICR.BIT.B1 = 1;
/* Ensure the pin is set to input */
PORTC.DDR.BIT.B1 = 0;
PORTC.DDR.BIT.B3 = 1;
PORTC.DR.BIT.B3 = 1;
/* Disable the A17-A output */
IOPORT.PF3BUS.BIT.A17E = 0;
break;
case 6:
SYSTEM.MSTPCRB.BIT.MSTPB25 = 0;
#ifdef SCI6_USE_B
IOPORT.PFFSCI.BIT.SCI6S = 1;
PORT3.DDR.BIT.B3 = 0;
//PORT3.ICR.BIT.B3 = 1;
PORT3.DDR.BIT.B2 = 1;
PORT3.DR.BIT.B2 = 1;
/* Disable the MTIOC0A output */
MTU0.TIORH.BIT.IOA = 0;
/* Disable the CTX0 output */
IOPORT.PFJCAN.BIT.CAN0E = 0;
/* Disable the MTIOC0C output */
MTU0.TIORL.BIT.IOC = 0;
#else
IOPORT.PFFSCI.BIT.SCI6S = 0;
PORT0.DDR.BIT.B0 = 1;
PORT0.DR.BIT.B0 = 1;
PORT0.ICR.BIT.B1 = 1;
PORT0.DDR.BIT.B1 = 0;
#endif
break;
default:
break;
}
/*stop bit*/
if (cfg->stop_bits == STOP_BITS_2) {
smr_copy |= BIT_3;
} else if (cfg->stop_bits != STOP_BITS_1) {
return RT_ERROR;
}
/*data bit*/
if (cfg->data_bits == 7) {
smr_copy |= BIT_6;
} else if (cfg->data_bits != DATA_BITS_8) {
return RT_ERROR;
}
/*parity*/
if (cfg->parity == PARITY_ODD)
smr_copy |= BIT_5;
else if (cfg->parity == PARITY_EVEN)
smr_copy |= BIT_4 | BIT_5;
brr_divider = rpdl_CGC_f_pclk / cfg->baud_rate;
/* There is a fixed division by 2 */
brr_divider /= 16;
/* Select 8 base clock cycles (ABCS = 1) */
semr_copy |= (unsigned char)BIT_4;
//brr_divider /= 8;
/* More division required? */
if (brr_divider > 256) {
/* Select 16 base clock cycles (ABCS = 0) */
semr_copy &= (unsigned char)INV_BIT_4;
brr_divider /= 2;
}
/* Load the BRR reset value */
//brr_copy = 0xFFu;
/* Ensure bits TIE, RIE, TE, RE and TEIE in the SCR are 0 */
uart->sci->SCR.BYTE = 0x00;
/* Configure the CKE & MPIE bits */
uart->sci->SCR.BYTE = scr_copy & (BIT_0 | BIT_1 | BIT_3);
/* Configure the SMR register */
uart->sci->SMR.BYTE = smr_copy;
/* Configure the SCMR register */
uart->sci->SCMR.BYTE = scmr_copy;
/* Configure the SEMR register */
uart->sci->SEMR.BYTE = semr_copy;
/* Configure the BRR register */
uart->sci->BRR = brr_divider - 1;
bit_interval_counter = rpdl_CGC_f_pclk / cfg->baud_rate;
/* Wait for at least a 1-bit duration */
do {
bit_interval_counter--;
}while (bit_interval_counter != 0);
scr_copy = 0x00u;
/*enable rx an tx*/
scr_copy |= BIT_5 | BIT_4 ;
uart->sci->SCR.BYTE &= 0x5B;
uart->sci->SCR.BYTE |= scr_copy;
*(IPR_ADDRESS(uart->UART)) = 5;
uart->sci->SSR.BYTE = 0xC0;
uart->sci->SSR.BYTE &= INV_BIT_5;
while (uart->sci->SSR.BYTE & BIT_4);
uart->sci->SSR.BYTE &= INV_BIT_3;
#else
struct rx_uart *uart;
/* Declare error flag */
bool err = true;
uint32_t flag = 0;
RT_ASSERT(serial != RT_NULL);
uart = (struct rx_uart *)serial->parent.user_data;
/* Configure the pin selection of SCI channel */
err &= R_SCI_Set
(
PDL_SCI_PIN_SCI2_B
);
uart->sci->SCR.BYTE |= BIT_4 | BIT_5;
switch (cfg->parity) {
case PARITY_ODD:
flag |= PDL_SCI_PARITY_ODD;
break;
case PARITY_EVEN:
flag |= PDL_SCI_PARITY_EVEN;
break;
default:
flag |= PDL_SCI_PARITY_NONE;
break;
}
switch (cfg->data_bits) {
case DATA_BITS_7:
flag |= PDL_SCI_7_BIT_LENGTH;
break;
case DATA_BITS_8:
flag |= PDL_SCI_8_BIT_LENGTH;
break;
}
switch (cfg->stop_bits) {
case STOP_BITS_1:
flag |= PDL_SCI_STOP_1;
break;
case STOP_BITS_2:
flag |= PDL_SCI_STOP_2;
break;
}
flag |= PDL_SCI_ASYNC |
PDL_SCI_TX_CONNECTED |
PDL_SCI_RX_CONNECTED |
PDL_SCI_CLK_INT_IO ;
/* Configure the RS232 port */
err &= R_SCI_Create(
uart->UART,
flag,
cfg->baud_rate,
5);
uart->sci->SCR.BYTE |= BIT_4|BIT_5;
__enable_interrupt();
#endif
switch (uart->UART) {
case 0:
//ier_copy |= BIT_6 | BIT_7;
ICU.IER[IER_SCI0_ERI0].BIT.IEN_SCI0_ERI0 = 1;
ICU.IER[IER_SCI0_RXI0].BIT.IEN_SCI0_RXI0 = 1;
ICU.IER[IER_SCI0_TEI0].BIT.IEN_SCI0_TEI0 = 1;
ICU.IER[IER_SCI0_TXI0].BIT.IEN_SCI0_TXI0 = 1;
break;
case 1:
ICU.IER[IER_SCI1_ERI1].BIT.IEN_SCI1_ERI1 = 1;
ICU.IER[IER_SCI1_RXI1].BIT.IEN_SCI1_RXI1 = 1;
//ICU.IER[IER_SCI1_TEI1].BIT.IEN_SCI1_TEI1 = 1;
//ICU.IER[IER_SCI1_TXI1].BIT.IEN_SCI1_TXI1 = 1;
break;
case 2:
ICU.IER[IER_SCI2_ERI2].BIT.IEN_SCI2_ERI2 = 1;
ICU.IER[IER_SCI2_RXI2].BIT.IEN_SCI2_RXI2 = 1;
ICU.IER[IER_SCI2_RXI2].BIT.IEN_SCI2_TEI2 = 0;
ICU.IER[IER_SCI2_TXI2].BIT.IEN_SCI2_TXI2 = 0;
break;
case 3:
ICU.IER[IER_SCI3_ERI3].BIT.IEN_SCI3_ERI3 = 1;
ICU.IER[IER_SCI3_RXI3].BIT.IEN_SCI3_RXI3 = 1;
ICU.IER[IER_SCI3_TEI3].BIT.IEN_SCI3_TEI3 = 1;
ICU.IER[IER_SCI3_TXI3].BIT.IEN_SCI3_TXI3 = 1;
break;
case 5:
ICU.IER[IER_SCI5_ERI5].BIT.IEN_SCI5_ERI5 = 1;
ICU.IER[IER_SCI5_RXI5].BIT.IEN_SCI5_RXI5 = 1;
ICU.IER[IER_SCI5_TEI5].BIT.IEN_SCI5_TEI5 = 1;
ICU.IER[IER_SCI5_TXI5].BIT.IEN_SCI5_TXI5 = 1;
break;
case 6:
ICU.IER[IER_SCI6_ERI6].BIT.IEN_SCI6_ERI6 = 1;
ICU.IER[IER_SCI6_RXI6].BIT.IEN_SCI6_RXI6 = 1;
ICU.IER[IER_SCI6_TEI6].BIT.IEN_SCI6_TEI6 = 1;
ICU.IER[IER_SCI6_TXI6].BIT.IEN_SCI6_TXI6 = 1;
break;
}
return RT_EOK;
}
static rt_err_t rx_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct rx_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct rx_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
uart->sci->SCR.BIT.RIE = 0;
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
(void)(uart->sci->RDR);
uart->sci->SCR.BIT.RIE = 1;
break;
}
return RT_EOK;
}
static int rx_putc(struct rt_serial_device *serial, char c)
{
struct rx_uart *uart;
uart = (struct rx_uart *)serial->parent.user_data;
while (uart->sci->SSR.BIT.TDRE == 0);
uart->sci->TDR = c;
return 1;
}
static int rx_getc(struct rt_serial_device *serial)
{
struct rx_uart *uart;
uart = (struct rx_uart *)serial->parent.user_data;
if (uart->sci->SSR.BIT.RDRF)
return (int) (uart->sci->RDR);
return -1;
}
static const struct rt_uart_ops rx_uart_ops =
{
rx_configure,
rx_control,
rx_putc,
rx_getc,
};
#if defined(RT_USING_UART2)
/* UART0 device driver structure */
struct rx_uart uart2 =
{
2,
&SCI2,
};
struct rt_serial_device serial2;
#pragma vector = VECT_SCI2_ERI2
__interrupt void Interrupt_SCI2_ERI2(void)
{
/* Will the user handle the errors? */
/* Clear the error flags */
SCI2.SSR.BYTE = (uint8_t)(BIT_7 | BIT_6);
}
#pragma vector = VECT_SCI2_RXI2
__interrupt void Interrupt_SCI2_RXI2(void)
{
rt_interrupt_enter();
rt_hw_serial_isr(&serial2, RT_SERIAL_EVENT_RX_IND);
rt_interrupt_leave();
}
#endif
void rt_hw_uart_init(void)
{
struct rx_uart *uart;
struct serial_configure config;
#ifdef RT_USING_UART2
uart = &uart2;
config.baud_rate = BAUD_RATE_38400;
config.bit_order = BIT_ORDER_LSB;
config.data_bits = DATA_BITS_8;
config.parity = PARITY_NONE;
config.stop_bits = STOP_BITS_1;
config.invert = NRZ_NORMAL;
config.bufsz = RT_SERIAL_RB_BUFSZ;
serial2.ops = &rx_uart_ops;
serial2.config = config;
/* register UART1 device */
rt_hw_serial_register(&serial2, "uart2",
RT_DEVICE_FLAG_RDWR |
RT_DEVICE_FLAG_INT_RX |
RT_DEVICE_FLAG_STREAM,
uart);
#endif
}
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