1 #include "uart_pl011.h"
10 UART011_PEIM = 1 << 8,
11 UART011_BEIM = 1 << 9,
12 UART011_OEIM = 1 << 10,
14 UART011_RXIS = 1 << 4,
15 UART011_RTIS = 1 << 6,
17 UART011_RXIC = 1 << 4,
18 UART011_RTIC = 1 << 6,
20 UART01x_CR_UARTEN = 1, // UART enable
21 UART011_CR_LBE = 0x080, // loopback enable
22 UART011_CR_TXE = 0x100, // transmit enable
23 UART011_CR_RXE = 0x200, // receive enable
25 UART01x_FR_BUSY = 0x008,
26 UART01x_FR_RXFE = 0x010,
27 UART01x_FR_TXFF = 0x020,
29 UART01x_LCRH_PEN = 0x02, // parity enable
30 UART01x_LCRH_FEN = 0x10, // FIFO enable
31 UART01x_LCRH_WLEN_8 = 0x60,
46 unsigned long Uart_pl011::rd(unsigned long reg) const
48 volatile unsigned long *r = (unsigned long*)(_base + reg);
52 void Uart_pl011::wr(unsigned long reg, unsigned long val) const
54 volatile unsigned long *r = (unsigned long*)(_base + reg);
58 bool Uart_pl011::startup(unsigned long base)
61 wr(UART011_CR, UART01x_CR_UARTEN | UART011_CR_TXE | UART011_CR_RXE);
62 // wr(UART011_FBRD, 2);
63 // wr(UART011_IBRD, 13);
64 // wr(UART011_LCRH, 0x60);
66 while (rd(UART01x_FR) & UART01x_FR_BUSY);
70 void Uart_pl011::shutdown()
73 wr(UART011_ICR, 0xffff);
77 bool Uart_pl011::enable_rx_irq(bool enable)
79 unsigned long mask = UART011_RXIM | UART011_RTIM;
81 wr(UART011_ICR, 0xffff);
82 wr(UART011_ECR, 0xff);
84 wr(UART011_IMSC, rd(UART011_IMSC) | mask);
86 wr(UART011_IMSC, rd(UART011_IMSC) & ~mask);
89 bool Uart_pl011::enable_tx_irq(bool /*enable*/) { return false; }
90 bool Uart_pl011::change_mode(Transfer_mode, Baud_rate r)
95 unsigned long old_cr = rd(UART011_CR);
100 wr(UART011_LCRH, UART01x_LCRH_WLEN_8 | UART01x_LCRH_FEN);
102 wr(UART011_CR, old_cr);
107 int Uart_pl011::get_char(bool blocking) const
109 while (!char_avail())
110 if (!blocking) return -1;
112 //wr(UART011_ICR, UART011_RXIC | UART011_RTIC);
114 int c = rd(UART01x_DR);
115 wr(UART011_ECR, 0xff);
119 int Uart_pl011::char_avail() const
121 return !(rd(UART01x_FR) & UART01x_FR_RXFE);
124 void Uart_pl011::out_char(char c) const
126 while (rd(UART01x_FR) & UART01x_FR_TXFF)
131 int Uart_pl011::write(char const *s, unsigned long count) const
133 unsigned long c = count;
141 while (rd(UART01x_FR) & UART01x_FR_BUSY)