jens
5c9c50ebeb
- added critical section - added interrupt global enable/disable - added console::getInstanveByName git-svn-id: http://moon:8086/svn/mips@76 a8ebac50-d88d-4704-bea3-6648445a41b3
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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#include <assert.h>
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#include <board.h>
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#include "uart.h"
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// ---------------------------------------------------------------------------------
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// Globals
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// ---------------------------------------------------------------------------------
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uart_if_t uart_if[2] =
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{
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{(uint32_t*)SYS_UART0_STAT, (uint32_t*)SYS_UART0_DATA, (uint32_t*)SYS_UART0_BAUD},
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{(uint32_t*)SYS_UART1_STAT, (uint32_t*)SYS_UART1_DATA, (uint32_t*)SYS_UART1_BAUD}
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};
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// ------------------------------------
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// Low-level I/O
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// ------------------------------------
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#define CALC_BAUD(b) \
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((uint32_t)((float)CPU_FREQ_HZ/(16*b) + 0.5f) - 1);
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void UART_setbaud(void const *pInst, uint32_t baudrate)
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{
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assert(pInst);
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uart_if_t *pReg = (uart_if_t*)pInst;
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*pReg->pBAUD = CALC_BAUD(baudrate);
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}
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int UART_readchar(void const *pInst)
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{
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assert(pInst);
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uart_if_t *pReg = (uart_if_t*)pInst;
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if (SYS_UART_BIT_RX_AVAIL & *pReg->pCTRL)
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return (*pReg->pDATA & 0xFF);
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return -1;
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}
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void UART_writechar(void const *pInst, char c)
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{
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assert(pInst);
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uart_if_t *pReg = (uart_if_t*)pInst;
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while((SYS_UART_BIT_TX_HALFFULL & *pReg->pCTRL) != 0);
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*pReg->pDATA = (uint32_t)c;
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}
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