diff options
Diffstat (limited to 'components')
| -rw-r--r-- | components/drivers/include/drivers/serial.h | 33 | ||||
| -rw-r--r-- | components/drivers/serial/serial.c | 52 |
2 files changed, 49 insertions, 36 deletions
diff --git a/components/drivers/include/drivers/serial.h b/components/drivers/include/drivers/serial.h index c966f5459b..41132ed916 100644 --- a/components/drivers/include/drivers/serial.h +++ b/components/drivers/include/drivers/serial.h @@ -29,7 +29,6 @@ #define __SERIAL_H__ #include <rtthread.h> -#include <rtdevice.h> #define BAUD_RATE_4800 4800 #define BAUD_RATE_9600 9600 @@ -56,11 +55,6 @@ #define NRZ_NORMAL 0 /* Non Return to Zero : normal mode */ #define NRZ_INVERTED 1 /* Non Return to Zero : inverted mode */ -#define HW_CONTROL_NONE 0 -#define HW_CONTROL_RTS 1 -#define HW_CONTROL_CTS 2 -#define HW_CONTROL_RTS_CTS 3 - #ifndef RT_SERIAL_RB_BUFSZ #define RT_SERIAL_RB_BUFSZ 64 #endif @@ -81,23 +75,21 @@ #define RT_SERIAL_TX_DATAQUEUE_LWM 30 /* Default config for serial_configure structure */ -#define RT_SERIAL_CONFIG_DEFAULT \ -{ \ - BAUD_RATE_115200, /* 115200 bits/s */ \ - DATA_BITS_8, /* 8 databits */ \ - STOP_BITS_1, /* 1 stopbit */ \ - PARITY_NONE, /* No parity */ \ - BIT_ORDER_LSB, /* LSB first sent */ \ - NRZ_NORMAL, /* Normal mode */ \ - HW_CONTROL_NONE, /* Hardware control */\ - 0 \ +#define RT_SERIAL_CONFIG_DEFAULT \ +{ \ + BAUD_RATE_115200, /* 115200 bits/s */ \ + DATA_BITS_8, /* 8 databits */ \ + STOP_BITS_1, /* 1 stopbit */ \ + PARITY_NONE, /* No parity */ \ + BIT_ORDER_LSB, /* LSB first sent */ \ + NRZ_NORMAL, /* Normal mode */ \ + 0 \ } struct serial_ringbuffer { - struct rt_ringbuffer rb; - rt_uint8_t *pool; - rt_uint16_t size; + rt_uint8_t buffer[RT_SERIAL_RB_BUFSZ]; + rt_uint16_t put_index, get_index; }; struct serial_configure @@ -108,8 +100,7 @@ struct serial_configure rt_uint32_t parity :2; rt_uint32_t bit_order :1; rt_uint32_t invert :1; - rt_uint32_t hw_control :2; - rt_uint32_t reserved :18; + rt_uint32_t reserved :20; }; struct rt_serial_device diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c index 9a356b6f0c..622d2cd68c 100644 --- a/components/drivers/serial/serial.c +++ b/components/drivers/serial/serial.c @@ -25,9 +25,6 @@ * 2012-11-23 bernard fix compiler warning. * 2013-02-20 bernard use RT_SERIAL_RB_BUFSZ to define * the size of ring buffer. - * 2014-02-26 bright use DeviceDriver ringbuffer. - * add hardware flow support. - * use new struct serial_ringbuffer. */ #include <rthw.h> @@ -36,7 +33,9 @@ rt_inline void serial_ringbuffer_init(struct serial_ringbuffer *rbuffer) { - rt_ringbuffer_init(&rbuffer->rb, rbuffer->pool, rbuffer->size); + rt_memset(rbuffer->buffer, 0, sizeof(rbuffer->buffer)); + rbuffer->put_index = 0; + rbuffer->get_index = 0; } rt_inline void serial_ringbuffer_putc(struct serial_ringbuffer *rbuffer, @@ -46,8 +45,17 @@ rt_inline void serial_ringbuffer_putc(struct serial_ringbuffer *rbuffer, /* disable interrupt */ level = rt_hw_interrupt_disable(); - rt_ringbuffer_putchar(&rbuffer->rb, ch); - // enable interrupt + + rbuffer->buffer[rbuffer->put_index] = ch; + rbuffer->put_index = (rbuffer->put_index + 1) & (RT_SERIAL_RB_BUFSZ - 1); + + /* if the next position is read index, discard this 'read char' */ + if (rbuffer->put_index == rbuffer->get_index) + { + rbuffer->get_index = (rbuffer->get_index + 1) & (RT_SERIAL_RB_BUFSZ - 1); + } + + /* enable interrupt */ rt_hw_interrupt_enable(level); } @@ -55,11 +63,25 @@ rt_inline int serial_ringbuffer_putchar(struct serial_ringbuffer *rbuffer, char ch) { rt_base_t level; - //rt_uint16_t next_index; + rt_uint16_t next_index; /* disable interrupt */ level = rt_hw_interrupt_disable(); - rt_ringbuffer_putchar(&rbuffer->rb, ch); + + next_index = (rbuffer->put_index + 1) & (RT_SERIAL_RB_BUFSZ - 1); + if (next_index != rbuffer->get_index) + { + rbuffer->buffer[rbuffer->put_index] = ch; + rbuffer->put_index = next_index; + } + else + { + /* enable interrupt */ + rt_hw_interrupt_enable(level); + + return -1; + } + /* enable interrupt */ rt_hw_interrupt_enable(level); @@ -68,14 +90,17 @@ rt_inline int serial_ringbuffer_putchar(struct serial_ringbuffer *rbuffer, rt_inline int serial_ringbuffer_getc(struct serial_ringbuffer *rbuffer) { - int ch = 0; + int ch; rt_base_t level; + ch = -1; /* disable interrupt */ level = rt_hw_interrupt_disable(); - /* get char */ - if (!rt_ringbuffer_getchar(&rbuffer->rb, (rt_uint8_t *)&ch)) - ch = -1; + if (rbuffer->get_index != rbuffer->put_index) + { + ch = rbuffer->buffer[rbuffer->get_index]; + rbuffer->get_index = (rbuffer->get_index + 1) & (RT_SERIAL_RB_BUFSZ - 1); + } /* enable interrupt */ rt_hw_interrupt_enable(level); @@ -88,10 +113,7 @@ rt_inline rt_uint32_t serial_ringbuffer_size(struct serial_ringbuffer *rbuffer) rt_base_t level; level = rt_hw_interrupt_disable(); - size = rt_ringbuffer_space_len(&rbuffer->rb); - /* size = (rbuffer->put_index - rbuffer->get_index) & (RT_SERIAL_RB_BUFSZ - 1); - */ rt_hw_interrupt_enable(level); return size; |