176 lines
5.5 KiB
C
176 lines
5.5 KiB
C
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#ifndef _UART_DEV_H_
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#define _UART_DEV_H_
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#include "typedef.h"
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#include "os/os_api.h"
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#include "jiffies.h"
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#include "irq.h"
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/* #include "jtime.h" */
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#define CONFIG_ENABLE_UART_SEM 1
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#define SET_INTERRUPT ___interrupt
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#define irq_disable(x) bit_clr_ie(x)
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#define irq_enable(x) bit_set_ie(x)
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#ifndef time_after
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#define time_after(a,b) (((long)(b) - (long)(a)) < 0)
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#endif
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#ifndef time_before
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#define time_before(a,b) time_after(b,a)
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#endif
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#ifndef MIN
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#endif
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#ifndef MAX
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#endif
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static inline u32 ut_get_jiffies(void)
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{
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#if 1
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return jiffies;
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#endif
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#if 0
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return Jtime_updata_jiffies();
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#endif
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}
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static inline u32 ut_msecs_to_jiffies(u32 msecs)
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{
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if (msecs >= 10) {
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msecs /= 10;
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} else if (msecs) {
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msecs = 1;
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}
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return msecs;
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}
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#if CONFIG_ENABLE_UART_SEM
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typedef OS_SEM UT_Semaphore ;
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static inline void UT_OSSemCreate(UT_Semaphore *sem, u32 count)
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{
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os_sem_create(sem, count);
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}
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static inline void UT_OSSemPost(UT_Semaphore *sem)
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{
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os_sem_post(sem);
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}
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static inline u32 UT_OSSemPend(UT_Semaphore *sem, u32 timeout)
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{
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return os_sem_pend(sem, timeout);
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}
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static inline void UT_OSSemSet(UT_Semaphore *sem, u32 count)
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{
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os_sem_set(sem, count);
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}
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static inline void UT_OSSemClose(UT_Semaphore *sem)
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{
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}
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static inline void ut_sleep()
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{
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os_time_dly(1);
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}
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#else
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typedef volatile u32 UT_Semaphore;
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static inline void UT_OSSemCreate(UT_Semaphore *sem, u32 count)
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{
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*sem = count;
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}
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static inline void UT_OSSemPost(UT_Semaphore *sem)
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{
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(*sem)++;
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}
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static inline u32 UT_OSSemPend(UT_Semaphore *sem, u32 timeout)
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{
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u32 _timeout = timeout + ut_get_jiffies();
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extern void clr_wdt();
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while (1) {
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if (*sem) {
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(*sem) --;
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break;
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}
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if ((timeout != 0) && time_before(_timeout, ut_get_jiffies())) {
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return -1;
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}
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clr_wdt();
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}
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return 0;
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}
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static inline void UT_OSSemSet(UT_Semaphore *sem, u32 count)
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{
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*sem = count;
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}
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static inline void UT_OSSemClose(UT_Semaphore *sem)
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{
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}
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static inline void ut_sleep()
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{
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extern void clr_wdt();
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clr_wdt();
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}
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#endif
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typedef void (*ut_isr_cbfun)(void *ut_bus, u32 status);
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struct uart_platform_data_t {
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u8 tx_pin; ///< 作为发送引脚的引脚号，可从参考gpio.h枚举中选，当引脚为空时，则填 -1
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u8 rx_pin; ///< 作为接收引脚的引脚号，可从参考gpio.h枚举中选，当引脚为空时，则填 -1
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void *rx_cbuf; ///< 如果使用中断DMA接收，则写入循环buf的首地址，ut中断使能；如果不使用，则写入NULL，无中断
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u32 rx_cbuf_size; ///< 循环buf的大小,必须为2的多少几次幂，如果不用循环buf，该值无效，可写NULL
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u32 frame_length; ///< 产生RT中断的字节数，如无中断，该值无效
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u32 rx_timeout; ///< 产生OT中断的时间值，单位ms，如无中断，该值无效
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ut_isr_cbfun isr_cbfun; ///< ut中断的回调函数句柄，不用回调函数则写入NULL，如无中断，句柄无效
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void *argv; ///< ut中断的回调函数的一个扩展形参，可供用户设定，如无回调函数，此参数无效
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u32 is_9bit: 1; ///< ut九位模式使能位，0：关闭；1：使能
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u32 baud: 24; ///< ut的波特率
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};
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/**
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* @brief 循环buf结构体类型定义
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*/
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typedef struct {
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u8 *buffer; ///<循环buf的首地址
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u32 buf_size; ///<循环buf的大小
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u32 buf_in; ///<循环buf的写偏移量
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u32 buf_out; ///<循环buf的读偏移量
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} KFIFO;
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enum {
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UT_TX = 1,
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UT_RX,
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UT_RX_OT
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};
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/**
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* @brief ut初始化函数的返回结构体，含各函数指针，供外部使用
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*/
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typedef struct {
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ut_isr_cbfun isr_cbfun; ///< ut中断的回调函数句柄，不用回调函数则写入NULL，如无中断，句柄无效
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void *argv; ///< ut中断的回调函数的一个扩展形参,在此返回
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void (*putbyte)(char a); ///< ut发送一个byte
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u8(*getbyte)(u8 *buf, u32 timeout); ///< ut接收一个byte，buf：字节存放地址；timeout：超时时间，单位ms；返回0：失败；返回1：成功
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u32(*read)(u8 *inbuf, u32 len, u32 timeout); ///< ut接收一个字符串，inbuf：字符串存放首地址；len：预接收长度；timeout：超时时间，单位ms；返回实际接收的长度
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void (*write)(const u8 *outbuf, u32 len); ///< ut发送一个字符串，outbuf：字符串首地址；len：发送的字符串长度；
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void (*set_baud)(u32 baud); ///< ut设置波特率，baud：波特率值
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u32 frame_length;
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u32 rx_timeout;
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KFIFO kfifo; ///< ut用的循环buf结构体的指针
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UT_Semaphore sem_rx;
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UT_Semaphore sem_tx;
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} uart_bus_t;
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const uart_bus_t *uart_dev_open(const struct uart_platform_data_t *arg);
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u32 uart_dev_close(uart_bus_t *ut);
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////////////////////////////////////////////////////////////////////////////////
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#endif
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