76 lines
2.1 KiB
C++
76 lines
2.1 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(const UART_Pair_Key pair){
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m_UARTPair = 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_UARTPair).USARTReg;
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usart->CR1 &= ~USART_CR1_UE; //Disable USART
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usart->CR1 = 0; //Clear USART config
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usart->CR1 = USART_CR1_TE | USART_CR1_RE; //Tx enable and Rx Enable
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usart->BRR = 8000000 / baudRate; //MAKE SURE ANY FUNCTION THAT CHANGES CLOCK UPDATES THIS! //TODO DO NOT HARDCODE THIS SHIT
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usart->CR1 |= USART_CR1_UE;
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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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USART_TypeDef* usart = getUARTPair(m_UARTPair).USARTReg;
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while(!(usart->ISR & USART_ISR_TXE)); //Wait for usart to finish what it's doing
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usart->TDR = c; //Send character
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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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