URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [branches/] [stable_0_2_x/] [or1ksim/] [peripheral/] [16450.c] - Diff between revs 1394 and 1396

Rev 1394	Rev 1396
Line 54...	Line 54...

`/* Number of clock cycles (one clock cycle is one call to the uart_clock())`	`/* Number of clock cycles (one clock cycle is one call to the uart_clock())`
`before a single character is transmitted or received. */`	`before a single character is transmitted or received. */`
`static unsigned long char_clks(int dll, int dlh, int lcr)`	`static unsigned long char_clks(int dll, int dlh, int lcr)`
`{`	`{`
`float bauds_per_char = 1.;`	`unsigned int bauds_per_char = 2;`
`unsigned long char_clks = ((dlh << 8) + dll);`	`unsigned long char_clks = ((dlh << 8) + dll);`

`if (lcr & UART_LCR_PARITY)`	`if (lcr & UART_LCR_PARITY)`
`bauds_per_char = bauds_per_char + 1.;`	`bauds_per_char += 2;`

`/* stop bits 1 or two */`	`/* stop bits 1 or two */`
`if (lcr & UART_LCR_STOP)`	`if (lcr & UART_LCR_STOP)`
`bauds_per_char = bauds_per_char + 2.;`	`bauds_per_char += 4;`
`else`	`else`
`if ((lcr & 0x3) != 0)`	`if ((lcr & 0x3) != 0)`
`bauds_per_char = bauds_per_char + 1.;`	`bauds_per_char += 2;`
`else`	`else`
`bauds_per_char = bauds_per_char + 1.5;`	`bauds_per_char += 3;`

`bauds_per_char = bauds_per_char + (5. + (lcr & 0x3));`	`bauds_per_char += 10 + ((lcr & 0x3) << 1);`

`return char_clks * bauds_per_char;`	`return (char_clks * bauds_per_char) >> 1;`
`}`	`}`

`/* Set a specific UART register with value. */`	`/* Set a specific UART register with value. */`
`void uart_write_byte(oraddr_t addr, uint32_t value, void *dat)`	`void uart_write_byte(oraddr_t addr, uint32_t value, void *dat)`
`{`	`{`