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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [orpsocv2/] [bench/] [sysc/] [src/] [UartSC.cpp] - Diff between revs 6 and 42

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Rev 6	Rev 42
Line 26...	Line 26...
`#include <iomanip>`	`#include <iomanip>`
`#include <cmath>`	`#include <cmath>`

`#include "UartSC.h"`	`#include "UartSC.h"`

	`//#define UART_SC_DEBUG`


`SC_HAS_PROCESS( UartSC );`	`SC_HAS_PROCESS( UartSC );`

`//! Constructor for the Uart system C model`	`//! Constructor for the Uart system C model`

Line 52...	Line 54...
`int uart_baud`	`int uart_baud`
`)`	`)`
`{`	`{`
`// Calculate number of clocks per UART bit`	`// Calculate number of clocks per UART bit`
`clocks_per_bit = (int)(clk_freq_hz/uart_baud);`	`clocks_per_bit = (int)(clk_freq_hz/uart_baud);`
	`bits_received=0;`
	`#ifdef UART_SC_DEBUG`
	`printf("UartSC Initialised: Sys. clk. freq.: %d Hz, Baud: %d, cpb: %d\n", clk_freq_hz, uart_baud, clocks_per_bit);`
	`#endif`
`}`	`}`


`// Maybe do this with threads instead?!`	`// Maybe do this with threads instead?!`
`void`	`void`
`UartSC::checkTx () {`	`UartSC::checkTx () {`

	`#ifdef UART_SC_DEBUG`
`//printf("Uart TX activity: level is : 0x%x\n", uarttx.read()&1);`	`//printf("Uart TX activity: level is : 0x%x\n", uarttx.read()&1);`
	`#endif`

`// Check the number of bits received`	`// Check the number of bits received`
`if (bits_received==0)`	`if (bits_received==0)`
`{`	`{`
`// Check if tx is low`	`// Check if tx is low`
Line 72...	Line 80...
`// Line pulled low, begin receive of new char`	`// Line pulled low, begin receive of new char`
`current_char = 0;`	`current_char = 0;`
`// Start`	`// Start`
`counter = 1;`	`counter = 1;`
`bits_received++; // We got the start bit`	`bits_received++; // We got the start bit`
`//cout << "UartSC checkTx: got start bit at time " << sc_time_stamp() << endl;`	`#ifdef UART_SC_DEBUG`
	`cout << "UartSC checkTx: got start bit at time " << sc_time_stamp() << endl;`
	`#endif`
`}`	`}`
`}`	`}`
`else if (bits_received > 0 && bits_received < 9)`	`else if (bits_received > 0 && bits_received < 9)`
`{`	`{`
`// Check the counter - see if it's time to sample the line`	`// Check the counter - see if it's time to sample the line`
Line 114...	Line 124...
`counter = 0;`	`counter = 0;`
`}`	`}`
`else`	`else`
`{`	`{`
`// Print the char`	`// Print the char`
`//printf("Char received: 0x%2x time: ", current_char);`	`#ifdef UART_SC_DEBUG`
`//cout << sc_time_stamp() << endl;`	`printf("Char received: 0x%2x time: ", current_char);`
`cout << current_char;`	`cout << sc_time_stamp() << endl;`
	`#endif`
	`// cout'ing the char didn't work for some systems - jb 090613ol`
	`//cout << current_char;`
	`printf("%c",current_char);`

`bits_received = 0;`	`bits_received = 0;`
`counter = 0;`	`counter = 0;`
`}`	`}`
`}`	`}`
`else`	`else`

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[/] [openrisc/] [trunk/] [orpsocv2/] [bench/] [sysc/] [src/] [UartSC.cpp] - Diff between revs 6 and 42