/**************************************************************************//**
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* @file uart.c
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* @version V1.10
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* $Revision: 2 $
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* $Date: 19/10/08 09:25 $
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* @brief Panchip series UART driver source file
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*
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* @note
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* Copyright (C) 2016 Panchip Technology Corp. All rights reserved.
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*****************************************************************************/
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#include "PanSeries.h"
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#include "pan_uart.h"
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#include "pan_clk.h"
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/**
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* @brief Initializes the UARTx peripheral according to the specified
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* parameters in the UART_InitStruct .
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* @param UARTx: where x can be 1, 2 to select the
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* UART peripheral.
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* @param UART_InitStruct: pointer to a UART_InitTypeDef structure that contains
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* the configuration information for the specified UART peripheral.
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* @retval UART init success (true) or fail (false)
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*/
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bool UART_Init(UART_T* UARTx, UART_InitTypeDef* UART_InitStruct)
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{
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uint32_t tmpreg = 0x00;
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uint32_t integerdivider = 0x00;
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uint32_t fractionaldivider = 0x00;
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uint64_t apbclock = 0x00;
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/*---------------------------- UART BRR Configuration -----------------------*/
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/* Configure the UART Baud Rate */
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apbclock = CLK_GetPeripheralFreq((void*)UARTx);
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/*unlock to enable write & read divisor register*/
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UARTx->LCR |= UART_LCR_DLAB_Msk;
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/* Determine the integer part baud_rate_divisor = PCLK*100 / (16*required_baud_rate)*/
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integerdivider = ((25 * apbclock) / (4 * (UART_InitStruct->UART_BaudRate)));
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//Too high baudrate (too small divider) would cause DLL/DLH be all 0 which means UART disabled,
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//thus return false if this happens.
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if (integerdivider < 100)
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return false;
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tmpreg = (integerdivider / 100);
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UARTx->RBR_THR_DLL = tmpreg & 0xFF;
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UARTx->IER_DLH = (tmpreg & 0xFF00 ) >> 8;
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/* Determine the fractional part */
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fractionaldivider = integerdivider - (100 * tmpreg);
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/* Implement the fractional part in the register */
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UARTx->DLF = ((((fractionaldivider * 16) + 50) / 100)) ;
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UARTx->LCR &= ~UART_LCR_DLAB_Msk;
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/*---------------------------- UART Line Configuration -----------------------*/
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tmpreg = UARTx->LCR;
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tmpreg &= ~(UART_LCR_SP_Msk | UART_LCR_EPS_Msk | UART_LCR_PEN_Msk | UART_LCR_STOP_Msk | UART_LCR_DLS_Msk);
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tmpreg |= (UART_InitStruct->UART_LineCtrl);
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UARTx->LCR = tmpreg;
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return true;
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}
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void UART_DeInit(UART_T* UARTx)
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{
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}
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bool UART_SendMultipleData(UART_T* UARTx, uint8_t* Buf, size_t BufSize, size_t SendSize)
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{
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if (BufSize < SendSize)
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return false;
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while (SendSize--)
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{
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UART_SendData(UARTx, *Buf++);
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while(!(UART_GetLineStatus(UARTx) & UART_LSR_TEMT_Msk)); // Wait until THR is empty to avoid data lost
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}
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return true;
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}
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bool UART_ReceiveMultipleData(UART_T* UARTx, uint8_t* Buf, size_t BufSize, size_t ExpectSize)
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{
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if (BufSize < ExpectSize)
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return false;
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while ((UART_GetLineStatus(UARTx) & UART_LSR_DR_Msk) && ExpectSize)
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{
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*Buf++ = UART_ReceiveData(UARTx);
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ExpectSize--;
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}
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return true;
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}
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/*** (C) COPYRIGHT 2016 Panchip Technology Corp. ***/
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