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Diffstat (limited to 'firmware/zpu/lib/hal_uart.c')
-rw-r--r-- | firmware/zpu/lib/hal_uart.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/firmware/zpu/lib/hal_uart.c b/firmware/zpu/lib/hal_uart.c deleted file mode 100644 index af60bed6a..000000000 --- a/firmware/zpu/lib/hal_uart.c +++ /dev/null @@ -1,121 +0,0 @@ -/* -*- c -*- */ -/* - * Copyright 2007,2008 Free Software Foundation, Inc. - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include "memory_map.h" -#include "hal_uart.h" -#include "hal_io.h" -#include "mdelay.h" - -//just to save you from going insane, note that firmware/FPGA UARTs [0-2] correspond to serial ports [1-3]. -//so in software, we refer to UART_DEBUG as UART0, but it transmits on pin TXD<1>. see the UART assignments in hal_uart.h. - -#define NSPEEDS 6 -#define MAX_WB_DIV 4 - -//if you're going to recalculate the divisors, it's just uart_clock_rate / baud_rate. -//uart_clock_rate is 50MHz for USRP2. -static const uint16_t -divisor_table[NSPEEDS] = { - 5208, // 9600 - 2604, // 19200 - 1302, // 38400 - 868, // 57600 - 434, // 115200 - 217 // 230400 -}; - -static char uart_mode[4] = { - [UART_DEBUG] = UART_MODE_ONLCR, - [UART_EXP] = UART_MODE_ONLCR, - [UART_GPS] = UART_MODE_ONLCR -}; - -static char uart_speeds[4] = { - [UART_DEBUG] = US_230400, - [UART_EXP] = US_230400, - [UART_GPS] = US_115200 -}; - -void -hal_uart_set_mode(hal_uart_name_t uart, int mode) -{ - uart_mode[uart] = mode; -} - -void hal_uart_set_speed(hal_uart_name_t uart, hal_uart_speed_t speed) -{ - uart_regs[uart].clkdiv = divisor_table[speed]; -} - -void -hal_uart_init(void) -{ - for(int i = 0; i < 3; i++) { - hal_uart_set_mode(i, uart_mode[i]); - hal_uart_set_speed(i, uart_speeds[i]); - } -} - -void -hal_uart_putc(hal_uart_name_t u, int ch) -{ - if ((ch == '\n') && (uart_mode[u] == UART_MODE_ONLCR)) //map \n->\r\n if necessary - hal_uart_putc(u, '\r'); - - while (uart_regs[u].txlevel == 0) // wait for fifo to have space - ; - - uart_regs[u].txchar = ch; -} - -void -hal_uart_putc_nowait(hal_uart_name_t u, int ch) -{ - if ((ch == '\n') && (uart_mode[u] == UART_MODE_ONLCR)) //map \n->\r\n if necessary - hal_uart_putc(u, '\r'); - - if(uart_regs[u].txlevel) // If fifo has space - uart_regs[u].txchar = ch; -} - -int -hal_uart_getc(hal_uart_name_t u) -{ - while ((uart_regs[u].rxlevel) == 0) // wait for data to be ready - ; - - return uart_regs[u].rxchar; -} - -int -hal_uart_getc_noblock(hal_uart_name_t u) -{ -// int timeout = 0; -// while (((uart_regs[u].rxlevel) == 0) && (timeout++ < HAL_UART_TIMEOUT_MS)) -// mdelay(1); - if(uart_regs[u].rxlevel == 0) return -1; - return uart_regs[u].rxchar; -} - -int hal_uart_rx_flush(hal_uart_name_t u) -{ - char x = 0; - while(uart_regs[u].rxlevel) x = uart_regs[u].rxchar; - return x; -} - |