OSStatus BUartRecv( mico_uart_t uart, void* data, uint32_t size, uint32_t timeout )
{
while (size != 0)
{
uint32_t transfer_size = MIN(uart_interfaces[uart].rx_buffer->size / 2, size);
/* Check if ring buffer already contains the required amount of data. */
if ( transfer_size > (uint32_t)BuartIOctl(BUART_IOCTL_RXFIFO_DATLEN_GET, 0) )
{
/* Set rx_size and wait in rx_complete semaphore until data reaches rx_size or timeout occurs */
uart_interfaces[uart].rx_size = transfer_size;
BuartIOctl(BUART_IOCTL_RXFIFO_TRGR_DEPTH_SET, uart_interfaces[uart].rx_size-1);
BuartIOctl(UART_IOCTL_RXINT_SET, 1);
#ifndef NO_MICO_RTOS
if ( mico_rtos_get_semaphore( &uart_interfaces[uart].rx_complete, timeout) != kNoErr )
{
//BuartIOctl(UART_IOCTL_RXINT_SET, 0);
uart_interfaces[uart].rx_size = 0;
return kTimeoutErr;
}
#else
uart_interfaces[uart].rx_complete = false;
int delay_start = mico_get_time_no_os();
while(uart_interfaces[uart].rx_complete == false){
if(mico_get_time_no_os() >= delay_start + timeout && timeout != MICO_NEVER_TIMEOUT){
uart_interfaces[uart].rx_size = 0;
return kTimeoutErr;
}
}
#endif
/* Reset rx_size to prevent semaphore being set while nothing waits for the data */
uart_interfaces[uart].rx_size = 0;
}
size -= transfer_size;
// Grab data from the buffer
do
{
uint32_t bytes_available;
bytes_available = (uint32_t)BuartIOctl(BUART_IOCTL_RXFIFO_DATLEN_GET, 0);
bytes_available = MIN( bytes_available, transfer_size );
BuartRecv(data, bytes_available, 0);
transfer_size -= bytes_available;
data = ( (uint8_t*) data + bytes_available );
} while ( transfer_size != 0 );
}
if ( size != 0 )
{
return kGeneralErr;
}
else
{
return kNoErr;
}
}
static OSStatus BUartRecv( platform_uart_driver_t* driver, void* data, uint32_t size, uint32_t timeout )
{
int next_trigger;
uint32_t recved_data_len = (uint32_t)BuartIOctl(BUART_IOCTL_RXFIFO_DATLEN_GET, 0);
uint32_t delay_start = 0;
while (size != 0)
{
uint32_t transfer_size = MIN( BUART_RX_FIFO_SIZE / 2, size );
/* Check if ring buffer already contains the required amount of data. */
if ( transfer_size > recved_data_len )
{
/* Set rx_size and wait in rx_complete semaphore until data reaches rx_size or timeout occurs */
driver->rx_size = transfer_size;
next_trigger = (driver->buart_fifo_head + driver->rx_size - 1)% BUART_RX_FIFO_SIZE;
/* */
if( next_trigger < driver->buart_fifo_head && (driver->buart_fifo_head + recved_data_len) < BUART_RX_FIFO_SIZE ){
BuartIOctl( BUART_IOCTL_RXFIFO_TRGR_DEPTH_SET, BUART_RX_FIFO_SIZE - 1 );
BuartIOctl(UART_IOCTL_RXINT_CLR, 0);
BuartIOctl(UART_IOCTL_RXINT_SET, 1);
#ifndef NO_MICO_RTOS
#if 0
if ( mico_rtos_get_semaphore( &driver->rx_complete, timeout) != kNoErr )
{
driver->rx_size = 0;
BuartIOctl(UART_IOCTL_RXINT_SET, 0);
return kTimeoutErr;
}
#else
delay_start = mico_get_time();
while(1){
mico_rtos_get_semaphore( &driver->rx_complete, 50);
if( (BUART_RX_FIFO_SIZE - driver->buart_fifo_head) <= (uint32_t)BuartIOctl(BUART_IOCTL_RXFIFO_DATLEN_GET, 0) )
break;
if( mico_get_time() - delay_start > timeout ){
driver->rx_size = 0;
BuartIOctl(UART_IOCTL_RXINT_SET, 0);
return kTimeoutErr;
}
}
#endif
#else
driver->rx_complete = false;
int delay_start = mico_get_time_no_os();
while(driver->rx_complete == false){
if(mico_get_time_no_os() >= delay_start + timeout && timeout != MICO_NEVER_TIMEOUT){
driver->rx_size = 0;
BuartIOctl(UART_IOCTL_RXINT_SET, 0);
return kTimeoutErr;
}
}
#endif
mico_thread_msleep(20);
}
#ifndef NO_MICO_RTOS
#if 1
recved_data_len = (uint32_t)BuartIOctl(BUART_IOCTL_RXFIFO_DATLEN_GET, 0);
if ( transfer_size > recved_data_len ){
BuartIOctl(UART_IOCTL_RXINT_CLR, 0);
BuartIOctl( BUART_IOCTL_RXFIFO_TRGR_DEPTH_SET, next_trigger );
BuartIOctl(UART_IOCTL_RXINT_SET, 1);
if ( mico_rtos_get_semaphore( &driver->rx_complete, timeout) != kNoErr )
{
driver->rx_size = 0;
BuartIOctl(UART_IOCTL_RXINT_SET, 0);
return kTimeoutErr;
}
}
else{
driver->rx_size = 0;
}
#else
//platform_log( "Waiting...,head:%d expext:%d trigger:%d", driver->buart_fifo_head, driver->rx_size, next_trigger );
BuartIOctl(UART_IOCTL_RXINT_CLR, 0);
BuartIOctl( BUART_IOCTL_RXFIFO_TRGR_DEPTH_SET, next_trigger );
BuartIOctl(UART_IOCTL_RXINT_SET, 1);
delay_start = mico_get_time();
while(1){
mico_rtos_get_semaphore( &driver->rx_complete, 50);
if( driver->rx_size <= (uint32_t)BuartIOctl(BUART_IOCTL_RXFIFO_DATLEN_GET, 0) )
break;
if( mico_get_time() - delay_start > timeout ){
driver->rx_size = 0;
BuartIOctl(UART_IOCTL_RXINT_SET, 0);
return kTimeoutErr;
}
}
#endif
#else
BuartIOctl(UART_IOCTL_RXINT_CLR, 0);
BuartIOctl( BUART_IOCTL_RXFIFO_TRGR_DEPTH_SET, next_trigger );
BuartIOctl(UART_IOCTL_RXINT_SET, 1);
driver->rx_complete = false;
delay_start = mico_get_time_no_os();
while(driver->rx_complete == false){
if(mico_get_time_no_os() >= delay_start + timeout && timeout != MICO_NEVER_TIMEOUT){
driver->rx_size = 0;
BuartIOctl(UART_IOCTL_RXINT_SET, 0);
return kTimeoutErr;
}
}
#endif
/* Reset rx_size to prevent semaphore being set while nothing waits for the data */
driver->rx_size = 0;
}
size -= transfer_size;
// Grab data from the buffer
do
{
uint32_t bytes_available;
bytes_available = (uint32_t)BuartIOctl(BUART_IOCTL_RXFIFO_DATLEN_GET, 0);
bytes_available = MIN( bytes_available, transfer_size );
BuartRecv(data, bytes_available, 0);
driver->buart_fifo_head = (driver->buart_fifo_head + bytes_available)% BUART_RX_FIFO_SIZE;
transfer_size -= bytes_available;
} while ( transfer_size != 0 );
}
if ( size != 0 )
{
return kGeneralErr;
}
else
{
return kNoErr;
}
}
