83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/*
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* Copyright (C) 2018 Marcus Comstedt
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <bsp/uart.h>
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#include <bsp/gctl.h>
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#include <bsp/regaccess.h>
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#include <bsp/util.h>
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#include <rdb/uart.h>
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#include <rdb/gctl.h>
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void Fx3UartInit(uint32_t baud_rate, Fx3UartParity_t parity, Fx3UartStopBits_t stop_bits)
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{
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/* Configure baud rate generator */
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Fx3WriteReg32(FX3_GCTL_UART_CORE_CLK,
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(((SYS_CLK/16 / baud_rate - 1) << FX3_GCTL_UART_CORE_CLK_DIV_SHIFT) & FX3_GCTL_UART_CORE_CLK_DIV_MASK) |
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(3UL << FX3_GCTL_UART_CORE_CLK_SRC_SHIFT) |
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FX3_GCTL_UART_CORE_CLK_CLK_EN);
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/* Reset UART */
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Fx3WriteReg32(FX3_UART_POWER, 0);
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Fx3UtilDelayUs(10);
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Fx3WriteReg32(FX3_UART_POWER, FX3_UART_POWER_RESETN);
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while(!(Fx3ReadReg32(FX3_UART_POWER) & FX3_UART_POWER_ACTIVE))
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;
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/* Configure and enable UART */
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Fx3WriteReg32(FX3_UART_CONFIG,
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stop_bits | parity |
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FX3_UART_CONFIG_ENABLE |
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FX3_UART_CONFIG_TX_ENABLE);
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}
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void Fx3UartTxByte(uint8_t byte)
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{
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while(!(Fx3ReadReg32(FX3_UART_STATUS) & FX3_UART_STATUS_TX_SPACE))
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;
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Fx3WriteReg32(FX3_UART_EGRESS_DATA, byte);
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}
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void Fx3UartTxBytes(const uint8_t *byte, size_t cnt)
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{
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while(cnt--)
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Fx3UartTxByte(*byte++);
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}
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extern void Fx3UartTxChar(char c)
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{
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if (c == '\n')
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Fx3UartTxByte('\r');
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Fx3UartTxByte(c);
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}
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extern void Fx3UartTxString(const char *str)
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{
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char c;
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while ((c = *str++))
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Fx3UartTxChar(c);
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}
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void Fx3UartTxFlush(void)
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{
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while(!(Fx3ReadReg32(FX3_UART_STATUS) & FX3_UART_STATUS_TX_DONE))
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;
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}
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