96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
/**
|
|
******************************************************************************
|
|
* @file SHAL_TIM.h
|
|
* @author Luca Lizaranzu
|
|
* @brief Related to USART and SHAL_UART abstractions
|
|
******************************************************************************
|
|
*/
|
|
|
|
|
|
#include "SHAL_UART.h"
|
|
#include "SHAL_GPIO.h"
|
|
#include "SHAL_UART_REG.h"
|
|
|
|
void SHAL_UART::init(const UART_Pair_Key pair){
|
|
|
|
m_key = pair;
|
|
|
|
auto uartPair = getUARTPair(pair); //Get the UART_PAIR information to be initialized
|
|
|
|
//Get the SHAL_GPIO pins for this SHAL_UART setup
|
|
const GPIO_Key Tx_Key = uartPair.TxKey; //Tx pin
|
|
const GPIO_Key Rx_Key = uartPair.RxKey; //Rx pin
|
|
|
|
GET_GPIO(Tx_Key).setPinMode(PinMode::ALTERNATE_FUNCTION_MODE);
|
|
GET_GPIO(Rx_Key).setPinMode(PinMode::ALTERNATE_FUNCTION_MODE);
|
|
|
|
GET_GPIO(Tx_Key).setAlternateFunction(uartPair.TxAlternateFunctionMask);
|
|
GET_GPIO(Rx_Key).setAlternateFunction(uartPair.RxAlternateFunctionMask);
|
|
|
|
|
|
SHAL_UART_Enable_Register pairUARTEnable = getUARTEnableReg(pair); //Register and mask to enable the SHAL_UART channel
|
|
|
|
SHAL_apply_bitmask(pairUARTEnable.reg,pairUARTEnable.mask);
|
|
|
|
|
|
}
|
|
|
|
void SHAL_UART::begin(uint32_t baudRate, SHAL_USART_Word_Length wordLength) const volatile {
|
|
|
|
auto CR = getUARTControlRegister1(m_key);
|
|
auto BRR = getUARTBaudRateRegister(m_key); // fix this
|
|
|
|
SHAL_clear_bitmask(CR.reg, CR.usart_enable_mask);
|
|
|
|
SHAL_apply_bitmask(CR.reg, static_cast<uint32_t>(wordLength));
|
|
SHAL_apply_bitmask(CR.reg, CR.receive_enable_mask);
|
|
SHAL_apply_bitmask(CR.reg, CR.transmit_enable_mask);
|
|
|
|
uint16_t baud = SystemCoreClock / (1 * baudRate);
|
|
SHAL_set_bits_16(BRR.reg, 16, baud, 0);
|
|
|
|
SHAL_apply_bitmask(CR.reg, CR.usart_enable_mask); //Enable
|
|
}
|
|
|
|
void SHAL_UART::sendString(const char *s) volatile {
|
|
const auto ISR = getUARTISR(m_key);
|
|
|
|
while (*s) sendChar(*s++); //Send chars while we haven't reached end of s
|
|
|
|
if(!SHAL_WAIT_FOR_CONDITION_US((*ISR.reg & ISR.transmission_complete_mask) != 0, 1000)){
|
|
assert(false);
|
|
}
|
|
}
|
|
|
|
void SHAL_UART::sendChar(char c) volatile {
|
|
|
|
/* TODO fix old
|
|
auto ISR = getUARTISR(m_key);
|
|
|
|
if(!SHAL_WAIT_FOR_CONDITION_US((*ISR.reg & ISR.transmit_data_register_empty_mask) == 0, 20)){ //TODO check if this is too slow for this? Need to check busy reg
|
|
assert(false);
|
|
}
|
|
|
|
|
|
*getUARTTransmitDataRegister(m_key).reg = c; //Send character
|
|
*/
|
|
/* Wait until TXE (Transmit Data Register Empty) */
|
|
while (!(USART3->ISR & USART_ISR_TXE_TXFNF))
|
|
{
|
|
/* spin */
|
|
}
|
|
USART3->TDR = (uint32_t)(uint8_t)c;
|
|
}
|
|
|
|
|
|
|
|
SHAL_UART& UARTManager::get(uint8_t uart) {
|
|
|
|
if(uart > NUM_USART_LINES - 1){
|
|
assert(false);
|
|
//Memory fault
|
|
}
|
|
|
|
return m_UARTs[uart];
|
|
}
|