84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/**
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******************************************************************************
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* @file SHAL_TIM.h
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* @author Luca Lizaranzu
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* @brief Related to USART and SHAL_UART abstractions
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******************************************************************************
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*/
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#include "SHAL_UART.h"
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#include "SHAL_GPIO.h"
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void SHAL_UART::init(UART_Pair_Key pair){
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m_key = pair;
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SHAL_UART_Pair uart_pair = getUARTPair(pair); //Get the UART_PAIR information to be initialized
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//Get the SHAL_GPIO pins for this SHAL_UART setup
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GPIO_Key Tx_Key = uart_pair.TxKey; //Tx pin
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GPIO_Key Rx_Key = uart_pair.RxKey; //Rx pin
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GET_GPIO(Tx_Key).setPinMode(PinMode::ALTERNATE_FUNCTION_MODE);
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GET_GPIO(Rx_Key).setPinMode(PinMode::ALTERNATE_FUNCTION_MODE);
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GET_GPIO(Tx_Key).setAlternateFunction(uart_pair.TxAlternateFunctionMask);
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GET_GPIO(Rx_Key).setAlternateFunction(uart_pair.RxAlternateFunctionMask);
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SHAL_UART_Enable_Register pairUARTEnable = getUARTEnableReg(pair); //Register and mask to enable the SHAL_UART channel
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*pairUARTEnable.reg |= pairUARTEnable.mask; //Enable SHAL_UART line
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}
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void SHAL_UART::begin(uint32_t baudRate) volatile {
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USART_TypeDef* usart = getUARTPair(m_key).USARTReg;
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auto control_reg = getUARTControlRegister1(m_key);
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SHAL_clear_bitmask(control_reg.reg, control_reg.usart_enable_mask); //Clear enable bit (turn off usart)
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usart->CR1 = 0; //Clear USART config
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SHAL_apply_bitmask(control_reg.reg, control_reg.transmit_enable_mask); //Enable Tx
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SHAL_apply_bitmask(control_reg.reg, control_reg.receive_enable_mask); //Enable Rx
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auto baud_rate_reg = getUARTBaudRateGenerationRegister(m_key);
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unsigned long adjustedBaudRate = 8000000 / baudRate;
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SHAL_set_bits(baud_rate_reg.reg,16,adjustedBaudRate,baud_rate_reg.offset); //MAKE SURE ANY FUNCTION THAT CHANGES CLOCK UPDATES THIS! //TODO DO NOT HARDCODE THIS SHIT
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SHAL_apply_bitmask(control_reg.reg, control_reg.usart_enable_mask); //Clear enable bit (turn off usart)
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}
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void SHAL_UART::sendString(const char *s) volatile {
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while (*s) sendChar(*s++); //Send chars while we haven't reached end of s
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}
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void SHAL_UART::sendChar(char c) volatile {
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auto ISR_non_fifo = getUARTISRFifoDisabled(m_key);
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if(!SHAL_WAIT_FOR_CONDITION_US((*ISR_non_fifo.reg & ISR_non_fifo.transmit_data_register_empty_mask) == 0, 500)){
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return;
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}
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auto transmit_reg = getUARTTransmitDataRegister(m_key);
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SHAL_set_bits_16(transmit_reg.reg,16,static_cast<uint16_t>(c),transmit_reg.offset);
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}
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SHAL_UART& UARTManager::get(uint8_t uart) {
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if(uart > NUM_USART_LINES - 1){
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assert(false);
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//Memory fault
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}
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return m_UARTs[uart];
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}
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