URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [drivers/] [uart.c] - Diff between revs 246 and 467

Rev 246	Rev 467
Line 31...	Line 31...
`{`	`{`
`int divisor;`	`int divisor;`
`float float_divisor;`	`float float_divisor;`

`/* Reset receiver and transmiter */`	`/* Reset receiver and transmiter */`
`REG8(UART_BASE + UART_FCR) = UART_FCR_ENABLE_FIFO \| UART_FCR_CLEAR_RCVR \| UART_FCR_CLEAR_XMIT \| UART_FCR_TRIGGER_4;`	`REG8(UART_BASE + UART_FCR) = UART_FCR_ENABLE_FIFO \| UART_FCR_CLEAR_RCVR`
	`\| UART_FCR_CLEAR_XMIT \| UART_FCR_TRIGGER_4;`

`/* Disable all interrupts */`	`/* Disable all interrupts */`
`REG8(UART_BASE + UART_IER) = 0x00;`	`REG8(UART_BASE + UART_IER) = 0x00;`

`/* Set 8 bit char, 1 stop bit, no parity */`	`/* Set 8 bit char, 1 stop bit, no parity */`
`REG8(UART_BASE + UART_LCR) = UART_LCR_WLEN8 & ~(UART_LCR_STOP \| UART_LCR_PARITY);`	`REG8(UART_BASE + UART_LCR) = UART_LCR_WLEN8 & ~(UART_LCR_STOP \|`
	`UART_LCR_PARITY);`

`/* Set baud rate */`	`/* Set baud rate */`
`float_divisor = (float) IN_CLK/(16 * UART_BAUD_RATE);`	`float_divisor = (float) IN_CLK/(16 * UART_BAUD_RATE);`
`float_divisor += 0.50f; // Ensure round up`	`float_divisor += 0.50f; // Ensure round up`
`divisor = (int) float_divisor;`	`divisor = (int) float_divisor;`