static inline void STOP_RX_HND(UART_Type *Uart, UART_DRIVER_INFO * drv_info, HANDLE hnd)
{
STOP_RX(Uart);
drv_info->drv_data->hnd_rcv = hnd->next;
hnd->len = drv_info->drv_data->rx_remaining;
usr_HND_SET_STATUS(hnd, RES_SIG_OK);
if( (hnd=drv_info->drv_data->hnd_rcv) )
START_RX_HND(Uart, drv_info, hnd);
else
START_RX_BUF(Uart, drv_info, drv_info->drv_data);
}
/** Stop receiving hnd
*
* @param pUsart
* @param drv_data
* @param hnd
*/
static void STOP_RX_HND(Usart* pUsart, UART_DRIVER_DATA drv_data, HANDLE hnd)
{
STOP_RX(pUsart);
drv_data->hnd_rcv = hnd->next;
hnd->len =pUsart->US_RCR;
hnd->dst.as_int = pUsart->US_RPR;
usr_HND_SET_STATUS(hnd, RES_SIG_OK);
if( (hnd=drv_data->hnd_rcv) )
START_RX_HND(pUsart, drv_data, hnd);
else
START_RX_BUF(pUsart, drv_data);
}
/**
* USART DSR
* @param drv_info
* @param hnd
*/
void USART_DSR(USART_INFO drv_info, HANDLE hnd)
{
UART_DRIVER_DATA drv_data = drv_info->drv_data;
unsigned char *ptr;
signed int size;
if(hnd->len)
{
hnd->next = NULL;
if (hnd->cmd & FLAG_READ)
{
if(drv_data->hnd_rcv)
{
hnd->list_add(drv_data->hnd_rcv);
return;
}
STOP_RX(drv_info->hw_base);
//try to read from buffer
ptr = (unsigned char*) (drv_info->hw_base->US_RPR);
if (ptr != drv_data->rx_ptr)
{
if (ptr < drv_data->rx_ptr)
{
size = min(hnd->len, drv_info->buf_size -
(drv_data->rx_ptr - drv_data->rx_buf));
memcpy(hnd->dst.as_byteptr, drv_data->rx_ptr, size);
hnd->len -= size;
hnd->dst.as_int += size;
drv_data->rx_ptr += size;
if(drv_data->rx_ptr == &drv_data->rx_buf[drv_info->buf_size])
drv_data->rx_ptr = drv_data->rx_buf;
}
if (hnd->len && (ptr > drv_data->rx_ptr))
{
size =min(hnd->len, ptr - drv_data->rx_ptr);
memcpy(hnd->dst.as_byteptr, drv_data->rx_ptr, size);
hnd->len -= size;
hnd->dst.as_int += size;
drv_data->rx_ptr += size;
}
}
if (hnd->len )
{
//receive directly
drv_data->hnd_rcv = hnd;
START_RX_HND(drv_info->hw_base, drv_data, hnd);
} else
{
RESUME_RX(drv_info->hw_base);
svc_HND_SET_STATUS(hnd, RES_SIG_OK);
}
} else
{
if (hnd->cmd & FLAG_WRITE)
{
if(drv_data->hnd_snd)
{
hnd->list_add(drv_data->hnd_snd);
} else
{
drv_data->hnd_snd = hnd;
START_TX_HND(drv_info->hw_base, hnd);
}
} else
{
svc_HND_SET_STATUS(hnd, RES_SIG_ERROR);
}
}
} else
{
svc_HND_SET_STATUS(hnd, RES_SIG_IDLE);
}
}
/** USART DCR
*
* @param drv_info
* @param reason
* @param param
*/
void USART_DCR(USART_INFO drv_info, unsigned int reason, HANDLE param)
{
UART_DRIVER_DATA drv_data = drv_info->drv_data;
unsigned int temp;
switch(reason)
{
case DCR_RESET:
drv_data->buf_size = drv_info->buf_size;
USART_OFF(drv_info);
break;
case DCR_OPEN:
{
DRV_UART_MODE pMode = (DRV_UART_MODE)(param->mode.as_voidptr);
if(pMode)
{
if(drv_data->cnt)
{
if( (pMode->mode != drv_data->mode) ||
(pMode->baudrate != drv_data->baudrate))
return;
} else
{
drv_data->mode = pMode->mode;
drv_data->baudrate =pMode->baudrate;
USART_CFG(drv_info, pMode);
START_RX_BUF(drv_info->hw_base, drv_data);
}
drv_data->cnt++;
param->res = RES_OK;
}
break;
}
case DCR_CLOSE:
if(drv_data->cnt)
if(!--drv_data->cnt)
USART_OFF(drv_info);
break;
case DCR_CANCEL:
{
if (param->cmd & FLAG_READ)
{
if(param == drv_data->hnd_rcv)
{
STOP_RX(drv_info->hw_base);
temp = drv_info->hw_base->US_RCR;
if(param->len > temp)
{
param->len = temp;
param->dst.as_int = drv_info->hw_base->US_RPR;
temp = RES_OK;
} else
temp = RES_SIG_IDLE;
drv_data->hnd_rcv = param->next;
if( drv_data->hnd_rcv )
START_RX_HND(drv_info->hw_base, drv_data, drv_data->hnd_rcv);
else
START_RX_BUF(drv_info->hw_base, drv_data);
svc_HND_SET_STATUS(param, temp);
} else
param->svc_list_cancel(drv_data->hnd_rcv);
} else
{
if(param == drv_data->hnd_snd)
{
STOP_TX(drv_info->hw_base);
temp = drv_info->hw_base->US_TCR;
if(param->len > temp)
{
param->len = temp;
param->src.as_int = drv_info->hw_base->US_TPR;
temp = RES_OK;
} else
temp = RES_SIG_IDLE;
drv_data->hnd_snd = param->next;
if( drv_data->hnd_snd )
START_TX_HND(drv_info->hw_base, drv_data->hnd_snd);
svc_HND_SET_STATUS(param, temp);
} else
param->svc_list_cancel(drv_data->hnd_snd);
}
break;
}
case DCR_CLOCK:
if(drv_data->cnt)
drv_info->hw_base->US_BRGR = AT91_GetDiv(drv_data->baudrate);
break;
}
}
void dsr_SerialDriver(UART_DRIVER_INFO* drv_info, HANDLE hnd)
{
unsigned char *ptr;
signed int size;
UART_DRIVER_DATA *drv_data = drv_info->drv_data;
UART_Type * Uart = drv_info->hw_base;
hnd->next = NULL;
if (hnd->cmd & FLAG_READ)
{
hnd->mode0 = 0; // няма нищо прието в хендъла
if(drv_data->hnd_rcv)
{
hnd->list_add(drv_data->hnd_rcv);
return;
}
STOP_RX(Uart);
//try to read from buffer
ptr = drv_data->rx_wrptr;
if( hnd->len && (ptr!= drv_data->rx_ptr) )
{
if(ptr < drv_data->rx_ptr)
{
size =min(hnd->len, (unsigned int)(&drv_data->rx_buf[RX_BUF_SIZE]) - (unsigned int)drv_data->rx_ptr);
memcpy(hnd->dst.as_byteptr, drv_data->rx_ptr, size);
hnd->mode0 = 1; // в хендъла е писано
hnd->len -= size;
hnd->dst.as_int += size;
drv_data->rx_ptr += size;
if(drv_data->rx_ptr == &drv_data->rx_buf[RX_BUF_SIZE])
drv_data->rx_ptr = drv_data->rx_buf;
}
if( hnd->len && (ptr!= drv_data->rx_ptr) )
{
size =min(hnd->len, ptr - drv_data->rx_ptr);
hnd->mode0 = 1; // в хендъла е писано
memcpy(hnd->dst.as_byteptr, drv_data->rx_ptr, size);
hnd->len -= size;
hnd->dst.as_int += size;
drv_data->rx_ptr += size;
}
}
if (hnd->len == 0)
{
RESUME_RX(Uart);
svc_HND_SET_STATUS(hnd, RES_SIG_OK);
return;
}
//receive directly
hnd->res = RES_BUSY;
drv_data->hnd_rcv = hnd;
START_RX_HND(Uart, drv_info, hnd);
return;
}
if (hnd->cmd & FLAG_WRITE)
{
if(hnd->len)
{
if(drv_data->hnd_snd)
{
hnd->list_add(drv_data->hnd_snd);
return;
}
hnd->res = RES_BUSY;
drv_data->hnd_snd = hnd;
START_TX_HND(Uart, hnd);
}
else
svc_HND_SET_STATUS(hnd, RES_SIG_OK);
return;
}
svc_HND_SET_STATUS(hnd, RES_SIG_ERROR);
}
void dcr_SerialDriver(UART_DRIVER_INFO* drv_info, unsigned int reason, HANDLE hnd)
{
UART_Type * Uart = drv_info->hw_base;
UART_DRIVER_DATA *drv_data = drv_info->drv_data;
switch(reason)
{
case DCR_ISR:
TX_CTS(drv_data, Uart, (unsigned int)hnd);
return;
case DCR_RESET:
SysCtlPeripheralReset(drv_info->info.peripheral_indx);
SysCtlPeripheralDisable(drv_info->info.peripheral_indx); // ??? turn off
return;
case DCR_OPEN:
{
UART_DRIVER_MODE *uart_mode = (UART_DRIVER_MODE *)(hnd->mode.as_voidptr);
if(uart_mode)
{
//unsigned long mode, baudrate;
if(drv_data->cnt)
{
if( uart_mode->mode != drv_data->mode.mode ||
uart_mode->baudrate != drv_data->mode.baudrate ||
uart_mode->hw_flow != drv_data->mode.hw_flow )
{
return;
}
}
else
{
// Enable AND Reset the UART peripheral
SysCtlPeripheralReset(drv_info->info.peripheral_indx);
if(drv_data->mode.hw_flow)
{
PIO_Cfg_List((PIN_DESC *)&drv_info->uart_pins[UART_LIST_ALL_PINS]);
ConfigureUart(drv_info, drv_data, uart_mode);
#ifdef HW_VER_10
if(drv_info->info.drv_index != UART1_IRQn)
TX_CTS(drv_data, Uart, PIO_Read(drv_info->uart_pins[CTS_PIN]));
#endif
}
else
{
PIO_Cfg_List((PIN_DESC *)&drv_info->uart_pins[UART_LIST_RX_TX_PINS]);
ConfigureUart(drv_info, drv_data, uart_mode);
}
START_RX_BUF(Uart, drv_info, drv_data);
}
drv_data->cnt++;
hnd->res = RES_OK;
}
return;
}
case DCR_CLOSE:
if(drv_data->cnt)
drv_data->cnt--;
case DCR_CANCEL:
{
if( !(hnd->res & FLG_BUSY))
return;
if (hnd->cmd & FLAG_READ)
{
if(hnd == drv_data->hnd_rcv)
{
STOP_RX(Uart);
if(hnd->len > drv_data->rx_remaining || hnd->mode0 )
{
hnd->len = drv_data->rx_remaining;
hnd->res = RES_SIG_OK;
}
else
hnd->res = RES_SIG_IDLE;
drv_data->hnd_rcv = hnd->next;
svc_HND_SET_STATUS(hnd, hnd->res);
if( (hnd=drv_data->hnd_rcv) )
START_RX_HND(Uart, drv_info, hnd);
else
START_RX_BUF(Uart, drv_info, drv_data);
}
else
{
// try cnacel
hnd->svc_list_cancel(drv_data->hnd_rcv);
}
}
else
{
if(hnd == drv_data->hnd_snd)
{
STOP_TX(Uart);
drv_data->hnd_snd = hnd->next;
svc_HND_SET_STATUS(hnd, RES_SIG_IDLE);
if( (hnd=drv_data->hnd_snd) )
START_TX_HND(Uart, hnd);
}
else
{
hnd->svc_list_cancel(drv_data->hnd_snd);
}
}
if(!drv_data->cnt)
{
NVIC->NVIC_DisableIRQ(drv_info->info.drv_index);
Uart->UARTDisable();
STOP_RX(Uart);
STOP_TX(Uart);
SysCtlPeripheralDisable(drv_info->info.peripheral_indx);
SYSCTL->SysCtlPeripheralDeepSleepDisable(drv_info->info.peripheral_indx);
SYSCTL->SysCtlPeripheralSleepDisable(drv_info->info.peripheral_indx);
if(drv_data->mode.hw_flow)
PIO_Free_List((PIN_DESC *)&drv_info->uart_pins[UART_LIST_ALL_PINS]);
else
PIO_Free_List((PIN_DESC *)&drv_info->uart_pins[UART_LIST_RX_TX_PINS]);
}
return;
}
case DCR_CLOCK:
return;
}
}