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update AT91SAM9260 usart driver， using serial driver component.

This commit is contained in:
weety 2013-07-21 15:01:42 +08:00
parent 9980041de6
commit 885301bb14
10 changed files with 436 additions and 822 deletions
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2
bsp/at91sam9260/SConscript
View File

@ -3,7 +3,7 @@ Import('RTT_ROOT')
from building import *
src_bsp = ['application.c', 'startup.c', 'board.c']
src_drv = ['console.c']
src_drv = ['usart.c']
if GetDepend('RT_USING_LED'):
src_drv += ['led.c']

223
bsp/at91sam9260/board.c
View File

@ -29,218 +29,7 @@ extern void rt_hw_mmu_init(void);
extern void rt_hw_get_clock(void);
extern void rt_hw_set_dividor(rt_uint8_t hdivn, rt_uint8_t pdivn);
extern void rt_hw_set_clock(rt_uint8_t sdiv, rt_uint8_t pdiv, rt_uint8_t mdiv);
/*set debug serial port*/
//#define USE_UART1
//#define USE_UART3
//#define USE_DBGU
#define DBGU ((struct uartport *)0xfffff200)
#define UART0 ((struct uartport *)AT91SAM9260_BASE_US0)
#define UART1 ((struct uartport *)AT91SAM9260_BASE_US1)
#define UART2 ((struct uartport *)AT91SAM9260_BASE_US2)
#define UART3 ((struct uartport *)AT91SAM9260_BASE_US3)
#define UART4 ((struct uartport *)AT91SAM9260_BASE_US4)
#define UART5 ((struct uartport *)AT91SAM9260_BASE_US5)
struct serial_int_rx uart0_int_rx;
struct serial_device uart0 =
{
DBGU,
&uart0_int_rx,
RT_NULL
};
struct rt_device uart0_device;
struct serial_int_rx uart1_int_rx;
struct serial_device uart1 =
{
UART0,
&uart1_int_rx,
RT_NULL
};
struct rt_device uart1_device;
struct serial_int_rx uart2_int_rx;
struct serial_device uart2 =
{
UART1,
&uart2_int_rx,
RT_NULL
};
struct rt_device uart2_device;
struct serial_int_rx uart3_int_rx;
struct serial_device uart3 =
{
UART2,
&uart3_int_rx,
RT_NULL
};
struct rt_device uart3_device;
struct serial_int_rx uart4_int_rx;
struct serial_device uart4 =
{
UART3,
&uart4_int_rx,
RT_NULL
};
struct rt_device uart4_device;
/**
* This function will handle serial
*/
void rt_serial_handler(int vector, void *param)
{
int status;
struct rt_device *dev = (rt_device_t)param;
switch (vector)
{
#ifdef RT_USING_UART0
case AT91SAM9260_ID_US0:
status = readl(AT91SAM9260_BASE_US0+AT91_US_CSR);
if (!(status & readl(AT91SAM9260_BASE_US0+AT91_US_IMR)))
{
return;
}
rt_hw_serial_isr(dev);
break;
#endif
#ifdef RT_USING_UART1
case AT91SAM9260_ID_US1:
status = readl(AT91SAM9260_BASE_US1+AT91_US_CSR);
if (!(status & readl(AT91SAM9260_BASE_US1+AT91_US_IMR)))
{
return;
}
rt_hw_serial_isr(dev);
break;
#endif
#ifdef RT_USING_UART2
case AT91SAM9260_ID_US2:
status = readl(AT91SAM9260_BASE_US2+AT91_US_CSR);
if (!(status & readl(AT91SAM9260_BASE_US2+AT91_US_IMR)))
{
return;
}
rt_hw_serial_isr(dev);
break;
#endif
#ifdef RT_USING_UART3
case AT91SAM9260_ID_US3:
status = readl(AT91SAM9260_BASE_US3+AT91_US_CSR);
if (!(status & readl(AT91SAM9260_BASE_US3+AT91_US_IMR)))
{
return;
}
rt_hw_serial_isr(dev);
break;
#endif
default: break;
}
}
void uart_port_init(rt_uint32_t base)
{
#define BAUDRATE 115200
rt_uint32_t cd;
writel(AT91_US_RSTTX | AT91_US_RSTRX |
AT91_US_RXDIS | AT91_US_TXDIS,
base + AT91_US_CR);
writel( AT91_US_USMODE_NORMAL | AT91_US_USCLKS_MCK |
AT91_US_CHRL_8 | AT91_US_PAR_NONE |
AT91_US_NBSTOP_1 | AT91_US_CHMODE_NORMAL,
base + AT91_US_MR);
cd = (clk_get_rate(clk_get("mck")) / 16 + BAUDRATE/2) / BAUDRATE;
writel(cd, base + AT91_US_BRGR);
writel(AT91_US_RXEN | AT91_US_TXEN, base + AT91_US_CR);
writel(0x1, base + AT91_US_IER);
}
/**
* This function will handle init uart
*/
void rt_hw_uart_init(void)
{
#ifdef RT_USING_UART0
at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US0);
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<4)|(1<<5));
at91_sys_write(AT91_PIOB + PIO_PUER, (1<<4));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<5));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<4)|(1<<5));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<4)|(1<<5));
uart_port_init(AT91SAM9260_BASE_US0);
/* install interrupt handler */
rt_hw_interrupt_install(AT91SAM9260_ID_US0, rt_serial_handler,
(void *)&uart1_device, "UART0");
rt_hw_interrupt_umask(AT91SAM9260_ID_US0);
#endif
#ifdef RT_USING_UART1
at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US1);
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<6)|(1<<7));
at91_sys_write(AT91_PIOB + PIO_PUER, (1<<6));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<7));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<6)|(1<<7));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<6)|(1<<7));
uart_port_init(AT91SAM9260_BASE_US1);
/* install interrupt handler */
rt_hw_interrupt_install(AT91SAM9260_ID_US1, rt_serial_handler,
(void *)&uart2_device, "UART1");
rt_hw_interrupt_umask(AT91SAM9260_ID_US1);
#endif
#ifdef RT_USING_UART2
at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US2);
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<8)|(1<<9));
at91_sys_write(AT91_PIOB + PIO_PUER, (1<<8));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<9));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<8)|(1<<9));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<8)|(1<<9));
uart_port_init(AT91SAM9260_BASE_US2);
/* install interrupt handler */
rt_hw_interrupt_install(AT91SAM9260_ID_US2, rt_serial_handler,
(void *)&uart3_device, "UART2");
rt_hw_interrupt_umask(AT91SAM9260_ID_US2);
#endif
#ifdef RT_USING_UART3
at91_sys_write(AT91_PMC_PCER, 1<<AT91SAM9260_ID_US3);
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<10)|(1<<11));
at91_sys_write(AT91_PIOB + PIO_PUER, (1<<10));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<11));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<10)|(1<<11));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<10)|(1<<11));
uart_port_init(AT91SAM9260_BASE_US3);
/* install interrupt handler */
rt_hw_interrupt_install(AT91SAM9260_ID_US3, rt_serial_handler,
(void *)&uart4_device, "UART3");
rt_hw_interrupt_umask(AT91SAM9260_ID_US3);
#endif
#ifdef RT_USING_DBGU
#define BAUDRATE 115200
rt_uint32_t cd;
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<14)|(1<<15));
//at91_sys_write(AT91_PIOB + PIO_PUER, (1<<6));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<14)|(1<<15));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<14)|(1<<15));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<14)|(1<<15));
at91_sys_write(AT91_PMC_PCER, 1 << AT91_ID_SYS);
at91_sys_write(AT91_DBGU + AT91_US_CR, AT91_US_RSTTX | AT91_US_RSTRX | AT91_US_RXDIS | AT91_US_TXDIS);
at91_sys_write(AT91_DBGU + AT91_US_IDR, 0xffffffff);
at91_sys_write(AT91_DBGU + AT91_US_MR, AT91_US_USMODE_NORMAL | AT91_US_PAR_NONE);
cd = (clk_get_rate(clk_get("mck")) / 16 + BAUDRATE/2) / BAUDRATE;
at91_sys_write(AT91_DBGU + AT91_US_BRGR, cd);
at91_sys_write(AT91_DBGU + AT91_US_CR, AT91_US_RXEN | AT91_US_TXEN);
at91_sys_read(AT91_DBGU + AT91_US_CSR); //read for clearing interrupt
at91_sys_write(AT91_DBGU + AT91_US_IER, 0x1);
#endif
}
extern void rt_dbgu_isr(void);
#define PIT_CPIV(x) ((x) & AT91_PIT_CPIV)
#define PIT_PICNT(x) (((x) & AT91_PIT_PICNT) >> 20)
@ -254,12 +43,13 @@ static rt_uint32_t pit_cnt; /* access only w/system irq blocked */
void rt_timer_handler(int vector, void *param)
{
#ifdef RT_USING_DBGU
if (at91_sys_read(AT91_DBGU + AT91_US_CSR) & 0x1) {
//rt_kprintf("DBGU interrupt occur\n");
rt_hw_serial_isr(&uart0_device);
if (at91_sys_read(AT91_DBGU + AT91_US_CSR) & 0x1)
{
rt_dbgu_isr();
}
#endif
if (at91_sys_read(AT91_PIT_SR) & AT91_PIT_PITS) {
if (at91_sys_read(AT91_PIT_SR) & AT91_PIT_PITS)
{
unsigned nr_ticks;
/* Get number of ticks performed before irq, and ack it */
@ -339,6 +129,7 @@ void rt_hw_board_init()
/* initialize uart */
rt_hw_uart_init();
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
/* initialize mmu */
rt_hw_mmu_init();

2
bsp/at91sam9260/board.h
View File

@ -16,9 +16,7 @@
#define __BOARD_H__
#include <at91sam926x.h>
#include <serial.h>
void rt_hw_board_init(void);
//void rt_hw_sdcard_init(void);
#endif

180
bsp/at91sam9260/console.c
View File

@ -1,180 +0,0 @@
#include <rtthread.h>
#include <serial.h>
#define RT_CONSOLE_WIDTH 240
#define RT_CONSOLE_HEIGHT 320
#define RT_CONSOLE_FONT_WIDTH 8
#define RT_CONSOLE_FONT_HEIGHT 16
#define RT_CONSOLE_COL (RT_CONSOLE_WIDTH/RT_CONSOLE_FONT_WIDTH)
#define RT_CONSOLE_ROW (RT_CONSOLE_HEIGHT/RT_CONSOLE_FONT_HEIGHT)
#define RT_CONSOLE_TAB 4
#define RT_CONSOLE_FOREPIXEL (0x001f)
extern struct serial_device uart0;
struct rt_console
{
rt_uint8_t* video_ptr;
rt_uint8_t* font_ptr;
/* bpp and pixel of width */
rt_uint8_t bpp;
rt_uint32_t pitch;
/* current cursor */
rt_uint8_t current_col;
rt_uint8_t current_row;
};
struct rt_console console;
void rt_hw_console_init(rt_uint8_t* video_ptr, rt_uint8_t* font_ptr, rt_uint8_t bpp);
void rt_hw_console_newline(void);
void rt_hw_console_putc(char c);
void rt_hw_console_clear(void);
void rt_hw_console_init(rt_uint8_t* video_ptr, rt_uint8_t* font_ptr, rt_uint8_t bpp)
{
rt_memset(&console, 0, sizeof(struct rt_console));
console.video_ptr = video_ptr;
console.font_ptr = font_ptr;
console.bpp = bpp;
console.pitch = console.bpp * RT_CONSOLE_WIDTH;
rt_hw_console_clear();
}
void rt_hw_console_putc(char c)
{
switch (c)
{
case 10:
case 11:
case 12:
case 13:
/* to next line */
rt_hw_console_newline();
console.current_col = 0;
break;
case 9:
console.current_col += RT_CONSOLE_TAB;
break;
default:
{
rt_uint8_t* font_ptr;
register rt_uint32_t cursor;
register rt_uint32_t i, j;
if (console.current_col == RT_CONSOLE_COL)
{
rt_hw_console_newline();
console.current_col = 0;
rt_hw_console_putc(c);
return;
}
font_ptr = console.font_ptr + c * RT_CONSOLE_FONT_HEIGHT;
cursor = (console.current_row * RT_CONSOLE_FONT_HEIGHT) * console.pitch
+ console.current_col * RT_CONSOLE_FONT_WIDTH * console.bpp;
for (i = 0; i < RT_CONSOLE_FONT_HEIGHT; i ++ )
{
for (j = 0; j < RT_CONSOLE_FONT_WIDTH; j ++)
{
if ( ((font_ptr[i] >> (7-j)) & 0x01) != 0 )
{
/* draw a pixel */
rt_uint8_t *ptr = &(console.video_ptr[cursor + i * console.pitch + j * console.bpp]);
switch(console.bpp)
{
case 1:
*ptr = RT_CONSOLE_FOREPIXEL;
break;
case 2:
*(rt_uint16_t*)ptr = RT_CONSOLE_FOREPIXEL;
break;
case 3:
ptr[0] = RT_CONSOLE_FOREPIXEL & 0xff;
ptr[1] = (RT_CONSOLE_FOREPIXEL >> 8) & 0xff;
ptr[2] = (RT_CONSOLE_FOREPIXEL >> 16) & 0xff;
break;
case 4:
*(rt_uint32_t*)ptr = RT_CONSOLE_FOREPIXEL;
break;
}
}
}
}
console.current_col ++;
}
break;
}
}
void rt_hw_console_newline()
{
console.current_row ++;
if (console.current_row >= RT_CONSOLE_ROW)
{
rt_uint32_t i;
/* scroll to next line */
for (i = 0; i < RT_CONSOLE_ROW - 1; i ++)
{
rt_memcpy(console.video_ptr + i * RT_CONSOLE_FONT_HEIGHT * console.pitch,
console.video_ptr + (i + 1) * RT_CONSOLE_FONT_HEIGHT * console.pitch,
RT_CONSOLE_FONT_HEIGHT * console.pitch);
}
/* clear last line */
rt_memset(console.video_ptr + (RT_CONSOLE_ROW - 1) * RT_CONSOLE_FONT_HEIGHT * console.pitch,
0,
RT_CONSOLE_FONT_HEIGHT * console.pitch);
console.current_row = RT_CONSOLE_ROW - 1;
}
}
void rt_hw_console_clear()
{
console.current_col = 0;
console.current_row = 0;
rt_memset(console.video_ptr, 0, RT_CONSOLE_HEIGHT * console.pitch);
}
/* write one character to serial, must not trigger interrupt */
void rt_hw_serial_putc(const char c)
{
/*
to be polite with serial console add a line feed
to the carriage return character
*/
if (c=='\n')rt_hw_serial_putc('\r');
while (!(uart0.uart_device->USART_CSR & TXRDY));
uart0.uart_device->USART_THR = (c & 0x1FF);
}
/**
* This function is used by rt_kprintf to display a string on console.
*
* @param str the displayed string
*/
void rt_hw_console_output(const char* str)
{
while (*str)
{
rt_hw_serial_putc(*str++);
}
}

20
bsp/at91sam9260/rtconfig.h
View File

@ -62,18 +62,27 @@
/* Using SLAB Allocator */
#define RT_USING_SLAB
/* SECTION: Device System */
/* Using Device System */
#define RT_USING_DEVICE
/* SECTION: the runtime libc library */
/* the runtime libc library */
#define RT_USING_NEWLIB
#define RT_USING_PTHREADS
/* Using Module System */
#define RT_USING_MODULE
#define RT_USING_LIBDL
/* SECTION: Device System */
/* Using Device System */
#define RT_USING_DEVICE
#define RT_USING_DEVICE_IPC
#define RT_USING_SERIAL
/* SECTION: Console options */
#define RT_USING_CONSOLE
/* the buffer size of console */
#define RT_CONSOLEBUF_SIZE 128
#define RT_CONSOLE_DEVICE_NAME "dbgu"
/* SECTION: finsh, a C-Express shell */
/* Using FinSH as Shell*/
@ -83,11 +92,6 @@
#define FINSH_USING_DESCRIPTION
#define FINSH_THREAD_STACK_SIZE 4096
/* SECTION: the runtime libc library */
/* the runtime libc library */
#define RT_USING_NEWLIB
#define RT_USING_PTHREADS
/* SECTION: C++ support */
/* Using C++ support */
/* #define RT_USING_CPLUSPLUS */

57
bsp/at91sam9260/startup.c
View File

@ -19,14 +19,8 @@
#ifdef RT_USING_FINSH
#include <finsh.h>
#endif
#ifdef RT_USING_DEVICE
#include <serial.h>
#endif
extern void rt_hw_interrupt_init(void);
extern void rt_hw_board_init(void);
extern void rt_serial_init(void);
extern void rt_system_timer_init(void);
extern void rt_system_scheduler_init(void);
extern void rt_thread_idle_init(void);
@ -37,9 +31,6 @@ extern void rt_system_heap_init(void*, void*);
extern void rt_hw_finsh_init(void);
extern void rt_application_init(void);
extern struct serial_device uart0;
extern struct rt_device uart0_device;
/**
* @addtogroup at91sam9260
*/
@ -109,50 +100,6 @@ void rtthread_startup(void)
/* initialize scheduler system */
rt_system_scheduler_init();
#ifdef RT_USING_DEVICE
#ifdef RT_USING_DBGU
/* register dbgu */
rt_hw_serial_register(&uart0_device, "uart0",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_RX,
&uart0);
#endif
#ifdef RT_USING_UART0
/* register uart0 */
rt_hw_serial_register(&uart1_device, "uart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_RX,
&uart1);
#endif
#ifdef RT_USING_UART1
/* register uart1 */
rt_hw_serial_register(&uart2_device, "uart2",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_RX,
&uart2);
#endif
#ifdef RT_USING_UART2
/* register uart2 */
rt_hw_serial_register(&uart3_device, "uart3",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_RX,
&uart3);
#endif
#ifdef RT_USING_UART3
/* register uart3 */
rt_hw_serial_register(&uart4_device, "uart4",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_RX,
&uart4);
#endif
#ifdef RT_USING_DFS
//rt_hw_sdcard_init();
#endif
/*init all registed devices */
rt_device_init_all();
#endif
/* initialize application */
rt_application_init();
@ -160,9 +107,7 @@ void rtthread_startup(void)
/* initialize finsh */
finsh_system_init();
#ifdef RT_USING_DEVICE
#ifdef RT_USING_DBGU
finsh_set_device("uart0");
#endif
finsh_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
#endif

413
bsp/at91sam9260/usart.c Normal file
View File

@ -0,0 +1,413 @@
#include <rtthread.h>
#include <rthw.h>
#include <at91sam926x.h>
#include <rtdevice.h>
#define RXRDY 0x01
#define TXRDY (1 << 1)
typedef struct uartport
{
volatile rt_uint32_t CR;
volatile rt_uint32_t MR;
volatile rt_uint32_t IER;
volatile rt_uint32_t IDR;
volatile rt_uint32_t IMR;
volatile rt_uint32_t CSR;
volatile rt_uint32_t RHR;
volatile rt_uint32_t THR;
volatile rt_uint32_t BRGR;
volatile rt_uint32_t RTOR;
volatile rt_uint32_t TTGR;
volatile rt_uint32_t reserved0[5];
volatile rt_uint32_t FIDI;
volatile rt_uint32_t NER;
volatile rt_uint32_t reserved1;
volatile rt_uint32_t IFR;
volatile rt_uint32_t reserved2[44];
volatile rt_uint32_t RPR;
volatile rt_uint32_t RCR;
volatile rt_uint32_t TPR;
volatile rt_uint32_t TCR;
volatile rt_uint32_t RNPR;
volatile rt_uint32_t RNCR;
volatile rt_uint32_t TNPR;
volatile rt_uint32_t TNCR;
volatile rt_uint32_t PTCR;
volatile rt_uint32_t PTSR;
}uartport;
#define CIDR FIDI
#define EXID NER
#define FNR reserved1
#define DBGU ((struct uartport *)AT91SAM9260_BASE_DBGU)
#define UART0 ((struct uartport *)AT91SAM9260_BASE_US0)
#define UART1 ((struct uartport *)AT91SAM9260_BASE_US1)
#define UART2 ((struct uartport *)AT91SAM9260_BASE_US2)
#define UART3 ((struct uartport *)AT91SAM9260_BASE_US3)
struct at91_uart {
uartport *port;
int irq;
};
/**
* This function will handle serial
*/
void rt_at91_usart_handler(int vector, void *param)
{
int status;
struct at91_uart *uart;
rt_device_t dev = (rt_device_t)param;
uart = (struct at91_uart *)dev->user_data;
status = uart->port->CSR;
if (!(status & uart->port->IMR))
{
return;
}
rt_interrupt_enter();
rt_hw_serial_isr(dev);
rt_interrupt_leave();
}
/**
* UART device in RT-Thread
*/
static rt_err_t at91_usart_configure(struct rt_serial_device *serial,
struct serial_configure *cfg)
{
int div;
int mode = 0;
struct at91_uart *uart;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
uart = (struct at91_uart *)serial->parent.user_data;
uart->port->CR = AT91_US_RSTTX | AT91_US_RSTRX |
AT91_US_RXDIS | AT91_US_TXDIS;
mode |= AT91_US_USMODE_NORMAL | AT91_US_USCLKS_MCK |
AT91_US_CHMODE_NORMAL;
switch (cfg->data_bits)
{
case DATA_BITS_8:
mode |= AT91_US_CHRL_8;
break;
case DATA_BITS_7:
mode |= AT91_US_CHRL_7;
break;
case DATA_BITS_6:
mode |= AT91_US_CHRL_6;
break;
case DATA_BITS_5:
mode |= AT91_US_CHRL_5;
break;
default:
mode |= AT91_US_CHRL_8;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_2:
mode |= AT91_US_NBSTOP_2;
break;
case STOP_BITS_1:
default:
mode |= AT91_US_NBSTOP_1;
break;
}
switch (cfg->parity)
{
case PARITY_ODD:
mode |= AT91_US_PAR_ODD;
break;
case PARITY_EVEN:
mode |= AT91_US_PAR_EVEN;
break;
case PARITY_NONE:
default:
mode |= AT91_US_PAR_NONE;
break;
}
uart->port->MR = mode;
div = (clk_get_rate(clk_get("mck")) / 16 + cfg->baud_rate/2) / cfg->baud_rate;
uart->port->BRGR = div;
uart->port->CR = AT91_US_RXEN | AT91_US_TXEN;
uart->port->IER = 0x01;
return RT_EOK;
}
static rt_err_t at91_usart_control(struct rt_serial_device *serial,
int cmd, void *arg)
{
struct at91_uart* uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct at91_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
rt_hw_interrupt_mask(uart->irq);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
rt_hw_interrupt_umask(uart->irq);
break;
}
return RT_EOK;
}
static int at91_usart_putc(struct rt_serial_device *serial, char c)
{
rt_uint32_t level;
struct at91_uart *uart = serial->parent.user_data;
while (!(uart->port->CSR & TXRDY));
uart->port->THR = c;
return 1;
}
static int at91_usart_getc(struct rt_serial_device *serial)
{
int result;
struct at91_uart *uart = serial->parent.user_data;
if (uart->port->CSR & RXRDY)
{
result = uart->port->RHR & 0xff;
}
else
{
result = -1;
}
return result;
}
static const struct rt_uart_ops at91_usart_ops =
{
at91_usart_configure,
at91_usart_control,
at91_usart_putc,
at91_usart_getc,
};
#if defined(RT_USING_DBGU)
static struct rt_serial_device serial_dbgu;
static struct serial_ringbuffer dbgu_int_rx;
struct at91_uart dbgu = {
DBGU,
AT91_ID_SYS
};
#endif
#if defined(RT_USING_UART0)
static struct rt_serial_device serial0;
static struct serial_ringbuffer uart0_int_rx;
struct at91_uart uart0 = {
UART0,
AT91SAM9260_ID_US0
};
#endif
#if defined(RT_USING_UART1)
static struct rt_serial_device serial1;
static struct serial_ringbuffer uart1_int_rx;
struct at91_uart uart1 = {
UART1,
AT91SAM9260_ID_US1
};
#endif
#if defined(RT_USING_UART2)
static struct rt_serial_device serial2;
static struct serial_ringbuffer uart2_int_rx;
struct at91_uart uart2 = {
UART2,
AT91SAM9260_ID_US2
};
#endif
#if defined(RT_USING_UART3)
static struct rt_serial_device serial3;
static struct serial_ringbuffer uart3_int_rx;
struct at91_uart uart3 = {
UART3,
AT91SAM9260_ID_US3
};
#endif
void at91_usart_gpio_init(void)
{
rt_uint32_t val;
#ifdef RT_USING_DBGU
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<14)|(1<<15));
//at91_sys_write(AT91_PIOB + PIO_PUER, (1<<6));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<14)|(1<<15));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<14)|(1<<15));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<14)|(1<<15));
at91_sys_write(AT91_PMC_PCER, 1 << AT91_ID_SYS);
#endif
#ifdef RT_USING_UART0
at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US0);
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<4)|(1<<5));
at91_sys_write(AT91_PIOB + PIO_PUER, (1<<4));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<5));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<4)|(1<<5));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<4)|(1<<5));
#endif
#ifdef RT_USING_UART1
at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US1);
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<6)|(1<<7));
at91_sys_write(AT91_PIOB + PIO_PUER, (1<<6));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<7));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<6)|(1<<7));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<6)|(1<<7));
#endif
#ifdef RT_USING_UART2
at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_US2);
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<8)|(1<<9));
at91_sys_write(AT91_PIOB + PIO_PUER, (1<<8));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<9));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<8)|(1<<9));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<8)|(1<<9));
#endif
#ifdef RT_USING_UART3
at91_sys_write(AT91_PMC_PCER, 1<<AT91SAM9260_ID_US3);
at91_sys_write(AT91_PIOB + PIO_IDR, (1<<10)|(1<<11));
at91_sys_write(AT91_PIOB + PIO_PUER, (1<<10));
at91_sys_write(AT91_PIOB + PIO_PUDR, (1<<11));
at91_sys_write(AT91_PIOB + PIO_ASR, (1<<10)|(1<<11));
at91_sys_write(AT91_PIOB + PIO_PDR, (1<<10)|(1<<11));
#endif
}
/**
* This function will handle init uart
*/
void rt_hw_uart_init(void)
{
at91_usart_gpio_init();
#if defined(RT_USING_DBGU)
serial_dbgu.ops = &at91_usart_ops;
serial_dbgu.int_rx = &dbgu_int_rx;
serial_dbgu.config.baud_rate = BAUD_RATE_115200;
serial_dbgu.config.bit_order = BIT_ORDER_LSB;
serial_dbgu.config.data_bits = DATA_BITS_8;
serial_dbgu.config.parity = PARITY_NONE;
serial_dbgu.config.stop_bits = STOP_BITS_1;
serial_dbgu.config.invert = NRZ_NORMAL;
/* register vcom device */
rt_hw_serial_register(&serial_dbgu, "dbgu",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
&dbgu);
#endif
#if defined(RT_USING_UART0)
serial0.ops = &at91_usart_ops;
serial0.int_rx = &uart0_int_rx;
serial0.config.baud_rate = BAUD_RATE_115200;
serial0.config.bit_order = BIT_ORDER_LSB;
serial0.config.data_bits = DATA_BITS_8;
serial0.config.parity = PARITY_NONE;
serial0.config.stop_bits = STOP_BITS_1;
serial0.config.invert = NRZ_NORMAL;
/* register vcom device */
rt_hw_serial_register(&serial0, "uart0",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
&uart0);
rt_hw_interrupt_install(uart0.irq, rt_at91_usart_handler,
(void *)&(serial0.parent), "UART0");
rt_hw_interrupt_umask(uart0.irq);
#endif
#if defined(RT_USING_UART1)
serial1.ops = &at91_usart_ops;
serial1.int_rx = &uart1_int_rx;
serial1.config.baud_rate = BAUD_RATE_115200;
serial1.config.bit_order = BIT_ORDER_LSB;
serial1.config.data_bits = DATA_BITS_8;
serial1.config.parity = PARITY_NONE;
serial1.config.stop_bits = STOP_BITS_1;
serial1.config.invert = NRZ_NORMAL;
/* register vcom device */
rt_hw_serial_register(&serial1, "uart1",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
&uart1);
rt_hw_interrupt_install(uart1.irq, rt_at91_usart_handler,
(void *)&(serial1.parent), "UART1");
rt_hw_interrupt_umask(uart1.irq);
#endif
#if defined(RT_USING_UART2)
serial2.ops = &at91_usart_ops;
serial2.int_rx = &uart2_int_rx;
serial2.config.baud_rate = BAUD_RATE_115200;
serial2.config.bit_order = BIT_ORDER_LSB;
serial2.config.data_bits = DATA_BITS_8;
serial2.config.parity = PARITY_NONE;
serial2.config.stop_bits = STOP_BITS_1;
serial2.config.invert = NRZ_NORMAL;
/* register vcom device */
rt_hw_serial_register(&serial2, "uart2",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
&uart2);
rt_hw_interrupt_install(uart2.irq, rt_at91_usart_handler,
(void *)&(serial2.parent), "UART2");
rt_hw_interrupt_umask(uart2.irq);
#endif
#if defined(RT_USING_UART3)
serial3.ops = &at91_usart_ops;
serial3.int_rx = &uart3_int_rx;
serial3.config.baud_rate = BAUD_RATE_115200;
serial3.config.bit_order = BIT_ORDER_LSB;
serial3.config.data_bits = DATA_BITS_8;
serial3.config.parity = PARITY_NONE;
serial3.config.stop_bits = STOP_BITS_1;
serial3.config.invert = NRZ_NORMAL;
/* register vcom device */
rt_hw_serial_register(&serial3, "uart3",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
&uart3);
rt_hw_interrupt_install(uart3.irq, rt_at91_usart_handler,
(void *)&(serial3.parent), "UART3");
rt_hw_interrupt_umask(uart3.irq);
#endif
}
#ifdef RT_USING_DBGU
void rt_dbgu_isr(void)
{
rt_at91_usart_handler(dbgu.irq, &(serial_dbgu.parent));
}
#endif

1
libcpu/arm/at91sam926x/at91sam926x.h
View File

@ -96,6 +96,7 @@ extern "C" {
#define AT91SAM9260_BASE_TC5 0xfffdc080
#define AT91SAM9260_BASE_ADC 0xfffe0000
#define AT91_BASE_SYS 0xffffe800
#define AT91SAM9260_BASE_DBGU 0xfffff200
/*
* System Peripherals (offset from AT91_BASE_SYS)

282
libcpu/arm/at91sam926x/serial.c
View File

@ -1,282 +0,0 @@
/*
* File : serial.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://openlab.rt-thread.com/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2011-01-13 weety first version
*/
#include <rtthread.h>
#include "serial.h"
/**
* @addtogroup AT91SAM926X
*/
/*@{*/
/* RT-Thread Device Interface */
/**
* This function initializes serial
*/
static rt_err_t rt_serial_init (rt_device_t dev)
{
struct serial_device* uart = (struct serial_device*) dev->user_data;
if (!(dev->flag & RT_DEVICE_FLAG_ACTIVATED))
{
if (dev->flag & RT_DEVICE_FLAG_INT_RX)
{
rt_memset(uart->int_rx->rx_buffer, 0,
sizeof(uart->int_rx->rx_buffer));
uart->int_rx->read_index = uart->int_rx->save_index = 0;
}
if (dev->flag & RT_DEVICE_FLAG_INT_TX)
{
rt_memset(uart->int_tx->tx_buffer, 0,
sizeof(uart->int_tx->tx_buffer));
uart->int_tx->write_index = uart->int_tx->save_index = 0;
}
dev->flag |= RT_DEVICE_FLAG_ACTIVATED;
}
return RT_EOK;
}
/* save a char to serial buffer */
static void rt_serial_savechar(struct serial_device* uart, char ch)
{
rt_base_t level;
/* disable interrupt */
level = rt_hw_interrupt_disable();
uart->int_rx->rx_buffer[uart->int_rx->save_index] = ch;
uart->int_rx->save_index ++;
if (uart->int_rx->save_index >= UART_RX_BUFFER_SIZE)
uart->int_rx->save_index = 0;
/* if the next position is read index, discard this 'read char' */
if (uart->int_rx->save_index == uart->int_rx->read_index)
{
uart->int_rx->read_index ++;
if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE)
uart->int_rx->read_index = 0;
}
/* enable interrupt */
rt_hw_interrupt_enable(level);
}
static rt_err_t rt_serial_open(rt_device_t dev, rt_uint16_t oflag)
{
RT_ASSERT(dev != RT_NULL);
return RT_EOK;
}
static rt_err_t rt_serial_close(rt_device_t dev)
{
RT_ASSERT(dev != RT_NULL);
return RT_EOK;
}
static rt_size_t rt_serial_read (rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
{
rt_uint8_t* ptr;
rt_err_t err_code;
struct serial_device* uart;
ptr = buffer;
err_code = RT_EOK;
uart = (struct serial_device*)dev->user_data;
if (dev->flag & RT_DEVICE_FLAG_INT_RX)
{
rt_base_t level;
/* interrupt mode Rx */
while (size)
{
if (uart->int_rx->read_index != uart->int_rx->save_index)
{
*ptr++ = uart->int_rx->rx_buffer[uart->int_rx->read_index];
size --;
/* disable interrupt */
level = rt_hw_interrupt_disable();
uart->int_rx->read_index ++;
if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE)
uart->int_rx->read_index = 0;
/* enable interrupt */
rt_hw_interrupt_enable(level);
}
else
{
/* set error code */
err_code = -RT_EEMPTY;
break;
}
}
}
else
{
/* polling mode */
while ((rt_uint32_t)ptr - (rt_uint32_t)buffer < size)
{
while (uart->uart_device->USART_CSR & RXRDY)
{
*ptr = uart->uart_device->USART_RHR & 0xff;
ptr ++;
}
}
}
/* set error code */
rt_set_errno(err_code);
return (rt_uint32_t)ptr - (rt_uint32_t)buffer;
}
static rt_size_t rt_serial_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
{
rt_uint8_t* ptr;
rt_err_t err_code;
struct serial_device* uart;
err_code = RT_EOK;
ptr = (rt_uint8_t*)buffer;
uart = (struct serial_device*)dev->user_data;
if (dev->flag & RT_DEVICE_FLAG_INT_TX)
{
/* interrupt mode Tx */
while (uart->int_tx->save_index != uart->int_tx->write_index)
{
/* save on tx buffer */
uart->int_tx->tx_buffer[uart->int_tx->save_index] = *ptr++;
-- size;
/* move to next position */
uart->int_tx->save_index ++;
/* wrap save index */
if (uart->int_tx->save_index >= UART_TX_BUFFER_SIZE)
uart->int_tx->save_index = 0;
}
/* set error code */
if (size > 0)
err_code = -RT_EFULL;
}
else
{
/* polling mode */
while (size)
{
/*
* to be polite with serial console add a line feed
* to the carriage return character
*/
if (*ptr == '\n' && (dev->flag & RT_DEVICE_FLAG_STREAM))
{
while (!(uart->uart_device->USART_CSR & TXRDY));
uart->uart_device->USART_THR = '\r';
}
while (!(uart->uart_device->USART_CSR & TXRDY));
uart->uart_device->USART_THR = (*ptr & 0xFF);
++ptr; --size;
}
}
/* set error code */
rt_set_errno(err_code);
return (rt_uint32_t)ptr - (rt_uint32_t)buffer;
}
static rt_err_t rt_serial_control (rt_device_t dev, rt_uint8_t cmd, void *args)
{
RT_ASSERT(dev != RT_NULL);
switch (cmd)
{
case RT_DEVICE_CTRL_SUSPEND:
/* suspend device */
dev->flag |= RT_DEVICE_FLAG_SUSPENDED;
break;
case RT_DEVICE_CTRL_RESUME:
/* resume device */
dev->flag &= ~RT_DEVICE_FLAG_SUSPENDED;
break;
}
return RT_EOK;
}
/*
* serial register
*/
rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct serial_device *serial)
{
RT_ASSERT(device != RT_NULL);
device->type = RT_Device_Class_Char;
device->rx_indicate = RT_NULL;
device->tx_complete = RT_NULL;
device->init = rt_serial_init;
device->open = rt_serial_open;
device->close = rt_serial_close;
device->read = rt_serial_read;
device->write = rt_serial_write;
device->control = rt_serial_control;
device->user_data = serial;
/* register a character device */
return rt_device_register(device, name, RT_DEVICE_FLAG_RDWR | flag);
}
/* ISR for serial interrupt */
void rt_hw_serial_isr(rt_device_t device)
{
struct serial_device* uart = (struct serial_device*) device->user_data;
/* interrupt mode receive */
RT_ASSERT(device->flag & RT_DEVICE_FLAG_INT_RX);
/* save on rx buffer */
while (uart->uart_device->USART_CSR & RXRDY)
{
rt_serial_savechar(uart, uart->uart_device->USART_RHR & 0xff);
}
/* invoke callback */
if (device->rx_indicate != RT_NULL)
{
rt_size_t rx_length;
/* get rx length */
rx_length = uart->int_rx->read_index > uart->int_rx->save_index ?
UART_RX_BUFFER_SIZE - uart->int_rx->read_index + uart->int_rx->save_index :
uart->int_rx->save_index - uart->int_rx->read_index;
device->rx_indicate(device, rx_length);
}
}
/*@}*/

76
libcpu/arm/at91sam926x/serial.h
View File

@ -1,76 +0,0 @@
#ifndef __RT_HW_SERIAL_H__
#define __RT_HW_SERIAL_H__
#include <rthw.h>
#include <rtthread.h>
#include "at91sam926x.h"
#define RXRDY 0x01
#define TXRDY (1 << 1)
#define BPS 115200 /* serial baudrate */
#define UART_RX_BUFFER_SIZE 64
#define UART_TX_BUFFER_SIZE 64
struct serial_int_rx
{
rt_uint8_t rx_buffer[UART_RX_BUFFER_SIZE];
rt_uint32_t read_index, save_index;
};
struct serial_int_tx
{
rt_uint8_t tx_buffer[UART_TX_BUFFER_SIZE];
rt_uint32_t write_index, save_index;
};
typedef struct uartport
{
/* USART register offsets */
volatile rt_uint32_t USART_CR;
volatile rt_uint32_t USART_MR;
volatile rt_uint32_t USART_IER;
volatile rt_uint32_t USART_IDR;
volatile rt_uint32_t USART_IMR;
volatile rt_uint32_t USART_CSR;
volatile rt_uint32_t USART_RHR;
volatile rt_uint32_t USART_THR;
volatile rt_uint32_t USART_BRGR;
volatile rt_uint32_t USART_RTOR;
volatile rt_uint32_t USART_TTGR;
volatile rt_uint32_t reseverd0[5];
volatile rt_uint32_t USART_FIDI;
volatile rt_uint32_t USART_NER;
volatile rt_uint32_t USART_XXR;
volatile rt_uint32_t USART_IFR;
volatile rt_uint32_t reserved1[44];
volatile rt_uint32_t USART_RPR;
volatile rt_uint32_t USART_RCR;
volatile rt_uint32_t USART_TPR;
volatile rt_uint32_t USART_TCR;
volatile rt_uint32_t USART_RNPR;
volatile rt_uint32_t USART_RNCR;
volatile rt_uint32_t USART_TNPR;
volatile rt_uint32_t USART_TNCR;
volatile rt_uint32_t USART_PTCR;
volatile rt_uint32_t USART_PTSR;
}uartport;
struct serial_device
{
uartport* uart_device;
/* rx structure */
struct serial_int_rx* int_rx;
/* tx structure */
struct serial_int_tx* int_tx;
};
rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct serial_device *serial);
void rt_hw_serial_isr(rt_device_t device);
#endif